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author:

Liu, Jingdong (Liu, Jingdong.) [1] | Hu, Haiman (Hu, Haiman.) [2] | Zheng, Yuanhui (Zheng, Yuanhui.) [3]

Indexed by:

EI

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 S8 maintain dynamic equilibrium through disproportionation reaction. S8 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 S8 at the surface of electrode is used to elucidate the discharge-charge process of Li/S battery. © 2021, The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature.

Keyword:

Cyclic voltammetry Electric discharges Electrodes Electron transport properties Ethylene Ethylene glycol Fuels Lithium batteries Lithium compounds Passivation Ultraviolet visible spectroscopy

Community:

  • [ 1 ] [Liu, Jingdong]College of Chemistry, Fuzhou University, No. 2, Xueyuan Road, New College Campus, Minghou Town, Fuzhou, China
  • [ 2 ] [Hu, Haiman]College of Chemistry, Fuzhou University, No. 2, Xueyuan Road, New College Campus, Minghou Town, Fuzhou, China
  • [ 3 ] [Zheng, Yuanhui]College of Chemistry, Fuzhou University, No. 2, Xueyuan Road, New College Campus, Minghou Town, Fuzhou, China

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Source :

Ionics

ISSN: 0947-7047

Year: 2021

Issue: 7

Volume: 27

Page: 2989-2996

2 . 9 6 1

JCR@2021

2 . 4 0 0

JCR@2023

ESI HC Threshold:87

JCR Journal Grade:3

CAS Journal Grade:4

Cited Count:

WoS CC Cited Count: 0

SCOPUS Cited Count: 4

ESI Highly Cited Papers on the List: 0 Unfold All

WanFang Cited Count:

Chinese Cited Count:

30 Days PV: 1

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