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author:

Chen, Fuqiang (Chen, Fuqiang.) [1] | Li, Jiamei (Li, Jiamei.) [2] | Shao, Yanqun (Shao, Yanqun.) [3] (Scholars:邵艳群) | Zhu, Zhijin (Zhu, Zhijin.) [4] | Shen, Tongwei (Shen, Tongwei.) [5] | Chen, Kongfa (Chen, Kongfa.) [6] (Scholars:陈孔发) | Chen, Yunxiang (Chen, Yunxiang.) [7] | Chen, Yaliang (Chen, Yaliang.) [8]

Indexed by:

EI Scopus SCIE

Abstract:

Layered double hydroxides (LDHs) have long been a hot research topic in supercapacitors because of their abundant reaction sites. However, LDH nanosheets tend to easily stack together during the synthesis process. Therefore, in this paper, a simple and effective stirring aging method was used to grow ZIF-67 uniformly on the surface of Ni-Mn LDH. The strategy can fully utilize the high specific surface area of ZIF-67 to provide a large number of active sites for Ni-Mn LDHs, which results in a significant increase of the capacitance contribution. The core-shell structure NM LDHs@Z has significant redox peaks and the surface redox reaction. The capacitance contribution of NM LDHs@Z increase from 21.7 % to 91.4 %. But it does not belong battery-type supercapacitors from the CV curves. It is necessary to find out a better characterization parameter to estimate the type of battery or capacitor, instead of the CV and GCD curve shapes. The Ni-Mn LDHs@ZIF-67 composites can achieve a specific capacitance of 1340 F g- 1at a current density of 1 A g-1. As the specific current density is increased to 10 A g- 1, the capacity retention can reach about 75 %, which is superior to that of the Ni-Mn LDHs (60 %). The hybrid supercapacitor is composed of Ni-Mn LDHs@ZIF-67 composite as the cathode and activated carbon (AC) as the anode with a 128 F g- 1 specific capacitance at a 1 A g- 1 current density and a 45.8 Wh kg- 1 energy density at a 850 W kg- 1 power density. The Ni-Mn LDH@ZIF-67 composites has a potential application in hybrid supercapacitors.

Keyword:

Aggregated LDHs Ni-Mn LDHs Supercapacitors ZIF-67

Community:

  • [ 1 ] [Chen, Fuqiang]Fuzhou Univ, Coll Mat Sci & Engn, Fuzhou 350108, Fujian, Peoples R China
  • [ 2 ] [Li, Jiamei]Fuzhou Univ, Coll Mat Sci & Engn, Fuzhou 350108, Fujian, Peoples R China
  • [ 3 ] [Shao, Yanqun]Fuzhou Univ, Coll Mat Sci & Engn, Fuzhou 350108, Fujian, Peoples R China
  • [ 4 ] [Zhu, Zhijin]Fuzhou Univ, Coll Mat Sci & Engn, Fuzhou 350108, Fujian, Peoples R China
  • [ 5 ] [Shen, Tongwei]Fuzhou Univ, Coll Mat Sci & Engn, Fuzhou 350108, Fujian, Peoples R China
  • [ 6 ] [Chen, Kongfa]Fuzhou Univ, Coll Mat Sci & Engn, Fuzhou 350108, Fujian, Peoples R China
  • [ 7 ] [Shao, Yanqun]Fuzhou Univ, Coll Zhicheng, Fuzhou 350002, Fujian, Peoples R China
  • [ 8 ] [Chen, Yunxiang]State Grid Fujian Elect Power Co Ltd, Elect Power Res Inst, Fuzhou 350007, Fujian, Peoples R China
  • [ 9 ] [Chen, Yaliang]Fujian Yongzheng Engn Qual Inspect Co Ltd, Fuzhou 350010, Fujian, Peoples R China

Reprint 's Address:

  • 邵艳群

    [Shao, Yanqun]Fuzhou Univ, Coll Mat Sci & Engn, Fuzhou 350108, Fujian, Peoples R China;;[Shao, Yanqun]Fuzhou Univ, Coll Zhicheng, Fuzhou 350002, Fujian, Peoples R China;;[Chen, Yunxiang]State Grid Fujian Elect Power Co Ltd, Elect Power Res Inst, Fuzhou 350007, Fujian, Peoples R China

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Source :

CHEMICAL ENGINEERING JOURNAL

ISSN: 1385-8947

Year: 2025

Volume: 507

1 3 . 4 0 0

JCR@2023

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: 1

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