Query：
学者姓名：刘景东
Refining：
Year
Type
Indexed by
Source
Complex
Co-
Language
Clean All
Abstract ：
The practical applications of solid-state electrolytes in lithium-ion batteries (LIBs) are hindered by their low ionic conductivity and high interfacial resistance. Herein, an ethoxylated trimethylolpropane triacrylate based quasi-solid-state electrolyte (ETPTA-QSSE) with a three-dimensional (3D) network is prepared by a one-step in-situ photopolymerization method. The 3D network is designed to overcome the contradiction between the plasticizer-related ionic conductivity and the thickness-dependent mechanical property of quasi-solid-state electrolytes. The ETPTA-QSSE achieves superb room-temperature ionic conductivity up to 4.55x10(-3) S cm(-1), a high lithium ion transference number of 0.57, along with a wide electrochemical window of 5.3 V (vs. Li+/Li), which outperforms most ever of the reported solid-state electrolytes. Owing to the robust network structure and the cathode-electrolyte integrated electrode design, Li metal symmetrical cells show reduced interface resistance and reinforced electrode/ electrolyte interface stability. When applying the ETPTA-QSSE in LiFePO4 parallel to Li cells, the quasi-solid-state cell demonstrates an enhanced initial discharge capacity (155.5 mAh g(-1) at 0.2 C) accompanied by a high average Coulombic efficiency of greater than 99.3%, offering capacity retention of 92% after 200 cycles. Accordingly, this work sheds light on the strategy of enhancing ionic conductivity and reducing interfacial resistance of quasi-solid-state electrolytes, which is promising for high-voltage LIBs.
Keyword ：
electrochemical window electrochemical window ionic conductivity ionic conductivity lithium-ion batteries lithium-ion batteries photopolymerization photopolymerization quasi-solid-state electrolyte quasi-solid-state electrolyte
Cite：
Copy from the list or Export to your reference management。
| GB/T 7714 | Zhang WenJing , Li SenLin , Zhang YuRong et al. A quasi-solid-state electrolyte with high ionic conductivity for stable lithium-ion batteries [J]. | SCIENCE CHINA-TECHNOLOGICAL SCIENCES , 2022 , 65 (10) : 2369-2379 . |
| MLA | Zhang WenJing et al. "A quasi-solid-state electrolyte with high ionic conductivity for stable lithium-ion batteries" . | SCIENCE CHINA-TECHNOLOGICAL SCIENCES 65 . 10 (2022) : 2369-2379 . |
| APA | Zhang WenJing , Li SenLin , Zhang YuRong , Wang XingHui , Liu JingDong , Zheng YuanHui . A quasi-solid-state electrolyte with high ionic conductivity for stable lithium-ion batteries . | SCIENCE CHINA-TECHNOLOGICAL SCIENCES , 2022 , 65 (10) , 2369-2379 . |
| Export to | NoteExpress RIS BibTex |
Version ：
Abstract ：
A lithium-sulfur battery, a potential next-generation secondary battery, is affected by poor conductivity of sulfur and the dissolution of intermediate polysulfides. Here we report a lithium-sulfur battery with ultrahigh sulfur loading and excellent cycling stability using porous graphitic carbon (PGC) as a high-conductivity carrier of sulfur and carbon fiber with crisscross conductive framework as an electric attachment site of sulfur. PGC is fabricated through a simple and environmentally friendly synthesis process involving high-temperature graphitization in a N-2 atmosphere followed by an annealing process in air. Due to the presence of porous graphitic structure, with C-O termination groups, PGC endows the lithium-sulfur battery system with excellent cycling performance. The lithium-sulfur battery cathode constructed by PGC with a sulfur loading of 2.5 mg cm(-2) still retains a high specific capacity of 734.4 mA h g(-1) after 200 cycles. Meanwhile, an ultrahigh sulfur loading of 12.8 mg cm(-2) for a CR2025 coin cell is achieved, which is the highest sulfur loading reported in the literature for the coin cell. The ultrahigh sulfur loading cell also shows good electrochemical properties, profiting from the mesopores terminated with C-O groups, high specific surface area of 1129.9 m(2) g(-1) and high-conductivity graphitic structure.
Cite：
Copy from the list or Export to your reference management。
| GB/T 7714 | Chen, Hui , Hong, Hengfeng , Zhang, Xin et al. Integration of porous graphitic carbon and carbon fiber framework for ultrahigh sulfur-loading lithium-sulfur battery [J]. | DALTON TRANSACTIONS , 2022 , 51 (8) : 3357-3365 . |
| MLA | Chen, Hui et al. "Integration of porous graphitic carbon and carbon fiber framework for ultrahigh sulfur-loading lithium-sulfur battery" . | DALTON TRANSACTIONS 51 . 8 (2022) : 3357-3365 . |
| APA | Chen, Hui , Hong, Hengfeng , Zhang, Xin , Zhang, Yurong , Liu, Jingdong , Zheng, Yuanhui . Integration of porous graphitic carbon and carbon fiber framework for ultrahigh sulfur-loading lithium-sulfur battery . | DALTON TRANSACTIONS , 2022 , 51 (8) , 3357-3365 . |
| Export to | NoteExpress RIS BibTex |
Version ：
Abstract ：
The practical applications of lithium sulfur batteries have been greatly restricted by the polysulfide shuttle effect and non-conductivity of sulfur. Here, we report a nickel-catalyzed carbonization method to synthesize three-dimensional (3D) nickel@N-doped carbon-nanotube (CNT) foams for lithium-sulfur batteries. The corresponding carbon/sulfur cathode with a high sulfur loading of 3.71 mg cm-2 possesses a high initial capacity of 855.6 mAh g-1 at 135 mA g-1 and good cyclic stability with a low fading rate of 0.153% per cycle for 100 cycles at 270 mA g-1. The growth of carbon thin layers on the nickel nanoparticles results in the encapsulation of the nanoparticles in the CNTs, which makes the carbon forms highly conductive and prevents the metal nanoparticles from being oxidized by polysulfides. The high conductivity is favorable for the electron transfer between polysulfides and carbon electrode. Moreover, the doped nitrogen atoms on the CNTs have strong chemical adsorption ability for polysulfides, accelerating redox reaction of polysulfides on the carbon electrode (i.e., suppressing the shuttle effect). These unique structural characteristics well explain the excellent electrochemical performance of the assembled batteries. It is believed that the fabricated carbon foam is a promising material for high sulfur-loading lithium-sulfur battery. (c) 2022 Published by Elsevier B.V.
Keyword ：
High sulfur loading High sulfur loading Internally grown nickel metal Internally grown nickel metal Lithium -sulfur battery Lithium -sulfur battery Stably high electrical conductivity Stably high electrical conductivity Three-dimensional carbon nanotubes foam Three-dimensional carbon nanotubes foam
Cite：
Copy from the list or Export to your reference management。
| GB/T 7714 | Hu, Haiman , Chen, Hui , Wang, Wensong et al. Synthesis of nickel@N-doped carbon nanotube foams for high sulfur-loading lithium-sulfur battery [J]. | JOURNAL OF ALLOYS AND COMPOUNDS , 2022 , 922 . |
| MLA | Hu, Haiman et al. "Synthesis of nickel@N-doped carbon nanotube foams for high sulfur-loading lithium-sulfur battery" . | JOURNAL OF ALLOYS AND COMPOUNDS 922 (2022) . |
| APA | Hu, Haiman , Chen, Hui , Wang, Wensong , Li, Senlin , Zhang, Yurong , Liu, Jingdong et al. Synthesis of nickel@N-doped carbon nanotube foams for high sulfur-loading lithium-sulfur battery . | JOURNAL OF ALLOYS AND COMPOUNDS , 2022 , 922 . |
| Export to | NoteExpress RIS BibTex |
Version ：
Abstract ：
A better understanding of the redox process of lithium polysulfide (LPS) on carbon surfaces is helpful for designing Li/S batteries with better performance. The "shuttle mechanism" can explain the low coulomb efficiency and self-discharge of a Li/S battery, but it cannot explain the fact that battery performance is strongly affected by electrolyte volume and sulfur load. This paper aims to reveal the main redox process of LPS on the surface of carbon by examining the cathodic behavior with different electrolyte volume and sulfur load. Scanning electron microscopy (SEM) images and impedance spectra of the cathode before and after the first discharge were compared, and it was found that the discharge process is the continuous dissolution of sulfur composited with carbon into the electrolyte to form LPS. At the same time, LPS re-precipitates sulfur on the surface of the cathode through a disproportionation reaction to form a solid film. Cyclic voltammetry (CV) curves showed that the solid film passivates the electrode, and the electrode is activated only when the potential is swept negatively and Li2S is generated. When a lean electrolyte is used, there is fluctuation in the CV curves, which proves that the dissolution-reprecipitation of sulfur is the main process of the cathode. The discharge-charge curves of cathodes with different sulfur load were compared, and it was found that there is wavy fluctuation in the discharge curve when the sulfur load increases, which proves again that the sulfur reaction dominates the electrode process. [GRAPHICS] .
Keyword ：
disproportionation reaction disproportionation reaction Li-S battery Li-S battery lithium polysulfides lithium polysulfides reaction mechanism reaction mechanism
Cite：
Copy from the list or Export to your reference management。
| GB/T 7714 | Liu, Jingdong , Zheng, Yuanhui . Dissolution and Reprecipitation of Sulfur on Carbon Surface [J]. | JOURNAL OF ELECTRONIC MATERIALS , 2022 , 51 (6) : 2926-2932 . |
| MLA | Liu, Jingdong et al. "Dissolution and Reprecipitation of Sulfur on Carbon Surface" . | JOURNAL OF ELECTRONIC MATERIALS 51 . 6 (2022) : 2926-2932 . |
| APA | Liu, Jingdong , Zheng, Yuanhui . Dissolution and Reprecipitation of Sulfur on Carbon Surface . | JOURNAL OF ELECTRONIC MATERIALS , 2022 , 51 (6) , 2926-2932 . |
| Export to | NoteExpress RIS BibTex |
Version ：
Abstract ：
The practical applications of lithium sulfur batteries have been greatly restricted by the polysulfide shuttle effect and non-conductivity of sulfur. Here, we report a nickel-catalyzed carbonization method to synthesize three-dimensional (3D) nickel@N-doped carbon-nanotube (CNT) foams for lithium-sulfur batteries. The corresponding carbon/sulfur cathode with a high sulfur loading of 3.71 mg cm(-2) possesses a high initial capacity of 855.6 mAh g(-1) at 135 mA g(-1) and good cyclic stability with a low fading rate of 0.153% per cycle for 100 cycles at 270 mA g(-1). The growth of carbon thin layers on the nickel nanoparticles results in the encapsulation of the nanoparticles in the CNTs, which makes the carbon forms highly conductive and prevents the metal nanoparticles from being oxidized by polysulfides. The high conductivity is favorable for the electron transfer between polysulfides and carbon electrode. Moreover, the doped nitrogen atoms on the CNTs have strong chemical adsorption ability for polysulfides, accelerating redox reaction of polysulfides on the carbon electrode (i.e., suppressing the shuttle effect). These unique structural characteristics well explain the excellent electrochemical performance of the assembled batteries. It is believed that the fabricated carbon foam is a promising material for high sulfur-loading lithium-sulfur battery. (C) 2022 Published by Elsevier B.V.
Keyword ：
High sulfur loading High sulfur loading Internally grown nickel metal Internally grown nickel metal Lithium-sulfur battery Lithium-sulfur battery Stably high electrical conductivity Stably high electrical conductivity Three-dimensional carbon nanotubes foam Three-dimensional carbon nanotubes foam
Cite：
Copy from the list or Export to your reference management。
| GB/T 7714 | Hu, Haiman , Chen, Hui , Wang, Wensong et al. Synthesis of nickel@N-doped carbon nanotube foams for high sulfur-loading lithium-sulfur battery [J]. | JOURNAL OF ALLOYS AND COMPOUNDS , 2022 , 922 . |
| MLA | Hu, Haiman et al. "Synthesis of nickel@N-doped carbon nanotube foams for high sulfur-loading lithium-sulfur battery" . | JOURNAL OF ALLOYS AND COMPOUNDS 922 (2022) . |
| APA | Hu, Haiman , Chen, Hui , Wang, Wensong , Li, Senlin , Zhang, Yurong , Liu, Jingdong et al. Synthesis of nickel@N-doped carbon nanotube foams for high sulfur-loading lithium-sulfur battery . | JOURNAL OF ALLOYS AND COMPOUNDS , 2022 , 922 . |
| Export to | NoteExpress RIS BibTex |
Version ：
Abstract ：
A novel silica@gallium core-shell structure is designed to maximize catalytically active surface gallium for highly efficient electrocatalysis of lithium polysulfides in lithium-sulfur batteries. The fabricated SiO2@Ga/S cathode battery exhibits a high reversible capacity of 927.1 mAh g(-1) at 0.75C and excellent cycling stability with a capacity retention rate of 85.97% for 600 cycles. When the sulfur mass loading is up to 6.5 mg cm(-2), the battery displays a high discharge capacity of similar to 4.145 mAh cm(-2) with high Coulombic efficiency of 85.04% after 200 cycles. Finally, a mechanism that the highly conductive electron-given-surface of liquid metal Ga shell on the surface of SiO2 in the thick electrodes for reversible electrocatalysis of lithium polysulfides in lithium-sulfur batteries is proposed.
Keyword ：
Liquid metal Liquid metal Lithium-sulfur batteries Lithium-sulfur batteries Reversible electrocatalysis Reversible electrocatalysis Silica@gallium core-shell particles Silica@gallium core-shell particles
Cite：
Copy from the list or Export to your reference management。
| GB/T 7714 | Li, Senlin , Zhang, Wenjing , Liu, Jingdong et al. Maximizing catalytically active surface gallium for electrocatalysis of lithium polysulfides in lithium-sulfur batteries by silica@gallium core-shell particles [J]. | APPLIED SURFACE SCIENCE , 2021 , 563 . |
| MLA | Li, Senlin et al. "Maximizing catalytically active surface gallium for electrocatalysis of lithium polysulfides in lithium-sulfur batteries by silica@gallium core-shell particles" . | APPLIED SURFACE SCIENCE 563 (2021) . |
| APA | Li, Senlin , Zhang, Wenjing , Liu, Jingdong , Zhang, Yurong , Zheng, Yuanhui . Maximizing catalytically active surface gallium for electrocatalysis of lithium polysulfides in lithium-sulfur batteries by silica@gallium core-shell particles . | APPLIED SURFACE SCIENCE , 2021 , 563 . |
| Export to | NoteExpress RIS BibTex |
Version ：
Abstract ：
Fundamental understanding on reaction mechanism of a working Li/S system is of great significance to design better batteries. In view of the importance of lithium polysulfides (PSs) in the working process of battery, PSs saturated solution in ethylene glycol dimethyl ether/1,3-dioxolane (DME/DOL) was synthesized by chemical method. The properties of PSs solution were studied by Tyndall experiment, UV-Vis spectroscopy, and OCP-t curve. It was found that the PSs solution is heterogeneous. PSs and S-8 maintain dynamic equilibrium through disproportionation reaction. S-8 generated accounts for passivation of electrode. Cyclic voltammetry of S/C electrode under different fabrication conditions were studied by using three electrode system. It was found that Li2S generated through reduction of PSs helps to dissolve passive layer and activates electrode. Passivation is more serious at charge stage. Process of electrode is an electron transfer reaction accompanied by chemical equilibrium. A novel mechanism based on precipitation and dissolution of S-8 at the surface of electrode is used to elucidate the discharge-charge process of Li/S battery.
Keyword ：
Discharge-charge process Discharge-charge process Li Li Reaction mechanism Reaction mechanism S batteries S batteries
Cite：
Copy from the list or Export to your reference management。
| GB/T 7714 | Liu, Jingdong , Hu, Haiman , Zheng, Yuanhui . A novel mechanism on discharge-charge process in Li/S batteries [J]. | IONICS , 2021 , 27 (7) : 2989-2996 . |
| MLA | Liu, Jingdong et al. "A novel mechanism on discharge-charge process in Li/S batteries" . | IONICS 27 . 7 (2021) : 2989-2996 . |
| APA | Liu, Jingdong , Hu, Haiman , Zheng, Yuanhui . A novel mechanism on discharge-charge process in Li/S batteries . | IONICS , 2021 , 27 (7) , 2989-2996 . |
| Export to | NoteExpress RIS BibTex |
Version ：
Abstract ：
Here we report a supercapacitor with high energy density and high cycling stability using low-cost and environmentally friendly CoMoO4/bamboo charcoal (BC) hybrid materials as the cathode. The hybrid materials were fabricated via a one-pot solvothermal reaction followed by an annealing process. The optimized CoMoO4/BC hybrid material has a specific surface area of 74.4 m(2) g(-1), being 1.7-fold higher than that of the CoMoO4 precursor. The hybrid electrode shows a high specific capacitance of 422.3 F g(-1) at 0.5 A g(-1) and 304.8 F g(-1) at 50 A g(-1). The as-assembled CoMoO4/BC parallel to activated carbon supercapacitor exhibits a high energy density of 56.7 W h kg(-1) and 18.3 W h kg(-1) at a power density of 785 W kg(-1) and 40 000 W kg(-1), respectively. Furthermore, it also shows excellent long-term cycling stability. Subjected to 40 000 cycles of charge-discharge test at a current density of 50 A g(-1), there is only about 10% capacitance loss (occurring only during the first 5000 cycles). This excellent electrochemical performance is ascribed to the covalent C-Mo and C-O bonds formed between CoMoO4 and BC as well as the porous feature of the hybrid material, which provide highways for electron transfer and ion transportation within the electrodes and at the electrode-electrolyte interface.
Cite：
Copy from the list or Export to your reference management。
| GB/T 7714 | Chen, Hui , Hu, Haiman , Han, Fei et al. CoMoO4/bamboo charcoal hybrid material for high-energy-density and high cycling stability supercapacitors [J]. | DALTON TRANSACTIONS , 2020 , 49 (31) : 10799-10807 . |
| MLA | Chen, Hui et al. "CoMoO4/bamboo charcoal hybrid material for high-energy-density and high cycling stability supercapacitors" . | DALTON TRANSACTIONS 49 . 31 (2020) : 10799-10807 . |
| APA | Chen, Hui , Hu, Haiman , Han, Fei , Liu, Jingdong , Zhang, Yurong , Zheng, Yuanhui . CoMoO4/bamboo charcoal hybrid material for high-energy-density and high cycling stability supercapacitors . | DALTON TRANSACTIONS , 2020 , 49 (31) , 10799-10807 . |
| Export to | NoteExpress RIS BibTex |
Version ：
Abstract ：
Lithium-sulfur battery has long been considered as the best choice for the next generation secondary battery. However, the intrinsic insulativity of sulfur and the polysulfide shuttle effect have been the key problems that hinder the commercialization of lithium sulfur batteries. Here, using a facile shearing implement assists thermal synthesis process, in which liquid metal gallium and sulfur (mass ratio1:10) are the only reactants, we create a 3D porous sulfur/gallium hybrid materials (S/Ga). Micro/nanometer liquid metal gallium particles embed in the porous sulfur. The S/Ga cathode lithium cell exhibits a high Coulombic efficiencies of 98.7%, and high specific capacities of 1044 mAh g(-1) after 100 cycles at 1.0 mA cm(-2), and good cyclic stability. During first cycle discharge process of the S/Ga cathode, the sulfur reduces to Li2S8 and dissolves in the electrolyte, then the liquid metal Ga has an intimate electrical contact with conductive carbon substrates. Electrons are easily transferred to high conductive liquid metal Ga. Due to the electron abundance on Ga surface, it shows an electrocatalytic effect for the conversion of soluble lithium polysulfides (Li2S4-8) to Li2S2/Li2S, thus improving S utilization and cyclic stability. (C) 2020 Elsevier Ltd. All rights reserved.
Keyword ：
Electrocatalytic effect Electrocatalytic effect Liquid metal Liquid metal Lithium-sulfur batteries Lithium-sulfur batteries Sulfur/gallium hybrid materials Sulfur/gallium hybrid materials
Cite：
Copy from the list or Export to your reference management。
| GB/T 7714 | Li, Senlin , Zhang, Xin , Chen, Hui et al. Electrocatalytic effect of 3D porous sulfur/gallium hybrid materials in lithium-sulfur batteries [J]. | ELECTROCHIMICA ACTA , 2020 , 364 . |
| MLA | Li, Senlin et al. "Electrocatalytic effect of 3D porous sulfur/gallium hybrid materials in lithium-sulfur batteries" . | ELECTROCHIMICA ACTA 364 (2020) . |
| APA | Li, Senlin , Zhang, Xin , Chen, Hui , Hu, Haiman , Liu, Jingdong , Zhang, Yurong et al. Electrocatalytic effect of 3D porous sulfur/gallium hybrid materials in lithium-sulfur batteries . | ELECTROCHIMICA ACTA , 2020 , 364 . |
| Export to | NoteExpress RIS BibTex |
Version ：
Abstract ：
Lithium-sulfur batteries have become an appealing candidate for low-cost and high-energy-density power sources. It is generally believed that the shuttle effect in Li/S batteries causes serious performance degradation, such as low coulombic efficiency, sulfur loss, and so on. Here, we report a new mechanism based on the disproportionation reactions of polysulfides (PSs) to explain the rapid fading of capacity in Li/S batteries. Two different electrolytes (i.e., a carbonate-based electrolyte and an ether-based electrolyte) were adopted to study the disproportionation mechanism. We found that elemental sulfur was reprecipitated on the surface of the cathodes, forming a passive layer. The passive layer formed in the carbonate-based electrolyte is much denser than that formed in the ether-based electrolyte, resulting in the faster capacity fading in the carbonate-based electrolyte. The simulation of cathodic peaks and anodic peaks in CV profiles confirms the disproportionation reaction of PSs in the ether-based electrolyte. The electrochemical behavior of these Li/S batteries are well explained by an EC mechanism that involves an electron transfer reaction followed by a reversible disproportionation reaction. It is found that the disproportionation of PSs plays a more important role than the shuttle effect during the initial stage of the charge/discharge process.
Keyword ：
disproportionation disproportionation Li-S batteries Li-S batteries polysulfides polysulfides rechargeable batteries rechargeable batteries redox shuttle redox shuttle
Cite：
Copy from the list or Export to your reference management。
| GB/T 7714 | Liu, Jingdong , Chen, Hui , Chen, Wenda et al. New Insight into the "Shuttle Mechanism" of Rechargeable Lithium-Sulfur Batteries [J]. | CHEMELECTROCHEM , 2019 , 6 (10) : 2782-2787 . |
| MLA | Liu, Jingdong et al. "New Insight into the "Shuttle Mechanism" of Rechargeable Lithium-Sulfur Batteries" . | CHEMELECTROCHEM 6 . 10 (2019) : 2782-2787 . |
| APA | Liu, Jingdong , Chen, Hui , Chen, Wenda , Zhang, Yurong , Zheng, Yuanhui . New Insight into the "Shuttle Mechanism" of Rechargeable Lithium-Sulfur Batteries . | CHEMELECTROCHEM , 2019 , 6 (10) , 2782-2787 . |
| Export to | NoteExpress RIS BibTex |
Version ：
Export
| Results： |
Selected to |
| Format： |
