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author:

Zhan, Guanghao (Zhan, Guanghao.) [1] | Yan, Ruibo (Yan, Ruibo.) [2] | Liao, Wenhua (Liao, Wenhua.) [3] | Hu, Qianqian (Hu, Qianqian.) [4] | Huang, Xiaoying (Huang, Xiaoying.) [5]

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Abstract:

Iron-based sulfides are considered promising anode materials for lithium-ion batteries (LIBs) due to their low cost and high theoretical specific capacities. However, low conductivity and dissolution of lithium polysulfides during the reaction hamper their practical applications. Herein, we firstly synthesized N-doped carbon-coated Fe1−xS (Fe1−xS@NC) sheets through vacuum pyrolysis of the precursor Fe1−xS(en)0.5 (en = ethylenediamine). Then Fe1−xS@NC-rGO composites (rGO = reduced graphene oxide) were prepared in which the Fe1−xS@NC sheets were anchored on the rGO. The performance of the composites as an anode material for LIBs has been investigated. It is found that coating N-doped C on Fe1−xS surfaces can improve the surface conductivity and electrochemical kinetics of Fe1−xS, which is beneficial for the conversion between lithium polysulfides and Fe1−xS. In addition, the coated N-doped C on the Fe1−xS sheets can serve as a barrier to direct contact between the electrolyte and the material, reducing the dissolution of polysulfides and preventing the loss of active ingredients. More importantly, the double protection of the N-doped C layer and the flexible rGO substrate minimizes the structural damage caused by the cyclic expansion of Fe1−xS@NC-rGO. As expected, Fe1−xS@NC-rGO exhibits good rate performance with a reversible capacity of 939.5 mA h g−1 after 1690 cycles at a current density of 1.0 A g−1, along with outstanding charge and discharge performance and excellent long-term cycling stability. This work shows that the introduction of NC coating and the rGO matrix into Fe1−xS would synergistically enhance the performance of Fe1−xS for LIBs and highlights the effectiveness of the synthetic strategy for double carbon-based materials-protected sulfides in developing superior LIB electrodes. © 2023 The Royal Society of Chemistry.

Keyword:

Anodes Cathodes Coatings Dissolution Doping (additives) Electric discharges Electrolytes Graphene Iron compounds Lithium compounds Lithium-ion batteries Lithium sulfur batteries Polysulfides Sulfur compounds

Community:

  • [ 1 ] [Zhan, Guanghao]College of Chemistry, Fuzhou University, Fujian, Fuzhou; 350108, China
  • [ 2 ] [Zhan, Guanghao]State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou; 350002, China
  • [ 3 ] [Yan, Ruibo]State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou; 350002, China
  • [ 4 ] [Yan, Ruibo]College of Chemistry and Materials Science, Fujian Normal University, Fujian, Fuzhou; 350007, China
  • [ 5 ] [Liao, Wenhua]State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou; 350002, China
  • [ 6 ] [Liao, Wenhua]College of Chemistry and Materials Science, Fujian Normal University, Fujian, Fuzhou; 350007, China
  • [ 7 ] [Hu, Qianqian]State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou; 350002, China
  • [ 8 ] [Huang, Xiaoying]State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou; 350002, China

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Source :

Dalton Transactions

ISSN: 1477-9226

Year: 2022

Issue: 6

Volume: 52

Page: 1711-1719

4 . 0

JCR@2022

3 . 5 0 0

JCR@2023

ESI HC Threshold:74

JCR Journal Grade:1

CAS Journal Grade:1

Cited Count:

WoS CC Cited Count:

SCOPUS Cited Count:

ESI Highly Cited Papers on the List: 0 Unfold All

WanFang Cited Count:

Chinese Cited Count:

30 Days PV: 0

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