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author:

Li, Senlin (Li, Senlin.) [1] (Scholars:林立森) | Zhang, Xin (Zhang, Xin.) [2] | Chen, Hui (Chen, Hui.) [3] | Hu, Haiman (Hu, Haiman.) [4] | Liu, Jingdong (Liu, Jingdong.) [5] (Scholars:刘景东) | Zhang, Yurong (Zhang, Yurong.) [6] (Scholars:张玉荣) | Pan, Yongxin (Pan, Yongxin.) [7] | Zheng, Yuanhui (Zheng, Yuanhui.) [8] (Scholars:郑远辉)

Indexed by:

EI Scopus SCIE

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 Liquid metal Lithium-sulfur batteries Sulfur/gallium hybrid materials

Community:

  • [ 1 ] [Li, Senlin]Fuzhou Univ, Coll Chem, Fuzhou 350116, Fujian, Peoples R China
  • [ 2 ] [Zhang, Xin]Fuzhou Univ, Coll Chem, Fuzhou 350116, Fujian, Peoples R China
  • [ 3 ] [Chen, Hui]Fuzhou Univ, Coll Chem, Fuzhou 350116, Fujian, Peoples R China
  • [ 4 ] [Hu, Haiman]Fuzhou Univ, Coll Chem, Fuzhou 350116, Fujian, Peoples R China
  • [ 5 ] [Liu, Jingdong]Fuzhou Univ, Coll Chem, Fuzhou 350116, Fujian, Peoples R China
  • [ 6 ] [Zhang, Yurong]Fuzhou Univ, Coll Chem, Fuzhou 350116, Fujian, Peoples R China
  • [ 7 ] [Pan, Yongxin]Fuzhou Univ, Coll Chem, Fuzhou 350116, Fujian, Peoples R China
  • [ 8 ] [Zheng, Yuanhui]Fuzhou Univ, Coll Chem, Fuzhou 350116, Fujian, Peoples R China
  • [ 9 ] [Zheng, Yuanhui]Fujian Sci & Technol Innovat Lab Optoelect Inform, Fuzhou 350002, Fujian, Peoples R China

Reprint 's Address:

  • 郑远辉

    [Zheng, Yuanhui]Fuzhou Univ, Coll Chem, Fuzhou 350116, Fujian, Peoples R China

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Source :

ELECTROCHIMICA ACTA

ISSN: 0013-4686

Year: 2020

Volume: 364

6 . 9 0 1

JCR@2020

5 . 5 0 0

JCR@2023

ESI Discipline: CHEMISTRY;

ESI HC Threshold:160

JCR Journal Grade:2

CAS Journal Grade:2

Cited Count:

WoS CC Cited Count: 33

SCOPUS Cited Count: 34

ESI Highly Cited Papers on the List: 0 Unfold All

WanFang Cited Count:

Chinese Cited Count:

30 Days PV: 0

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