Electrochemical Lithiation of Covalently Bonded Sulfur in Vulcanized Polyisoprene

被引：44

作者：

Fu, Chengyin ^{[1
]}

Li, Guanghui ^{[1
,2
]}

Zhang, Jian ^{[1
]}

Cornejo, Benjamin ^{[1
]}

Piao, Sophie S. ^{[5
]}

Bozhilov, Krassimir N. ^{[3
]}

Haddon, Robert C. ^{[1
,2
,4
]}

Guo, Juchen ^{[1
]}

机构：

[1] Univ Calif Riverside, Dept Chem & Environm Engn, Riverside, CA 92521 USA

[2] Univ Calif Riverside, Ctr Nanoscale Sci & Engn, Riverside, CA 92521 USA

[3] Univ Calif Riverside, Cent Facil Adv Microscopy & Microanal, Riverside, CA 92521 USA

[4] Univ Calif Riverside, Dept Chem, Riverside, CA 92521 USA

[5] CALTECH, Div Chem & Chem Engn, Pasadena, CA 91125 USA

来源：

ACS ENERGY LETTERS | 2016年 / 1卷 / 01期

基金：

美国国家科学基金会;

关键词：

COMPOSITE CATHODE MATERIALS; ELEMENTAL-SULFUR; INVERSE VULCANIZATION; ELECTRODES; BATTERIES; STORAGE;

D O I：

10.1021/acsenergylett.6b00073

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

We report the synthesis of vulcanized polyisoprene (SPIP) nanowires and an investigation of the electrochemical lithiation mechanism of the covalently bonded sulfur bridges in SPIP. Electrochemical analysis demonstrates that the sulfur chains in SPIP have distinct electrochemical signatures from those that are characteristic of bulk elemental sulfur. The cyclic voltammetry and galvanostatic cycling data show a distinct multistep charge transfer process and solid-state lithium sulfur reaction behavior, and it is clear that this new material provides a promising basis for the development of cathodes for rechargeable batteries. Chemical changes due to the lithiation process are studied using Raman and X-ray photoelectron spectroscopy, on the basis of which new lithiation mechanisms of covalently bonded sulfur are proposed.

引用

页码：115 / 120

页数：6

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