Acacia Senegal-Inspired Bifunctional Binder for Longevity of Lithium-Sulfur Batteries

被引：226

作者：

Li, Gaoran ^{[1
]}

Ling, Min ^{[2
,3
]}

Ye, Yifan ^{[4
,5
]}

Li, Zhoupeng ^{[1
]}

Guo, Jinghua ^{[5
,6
]}

Yao, Yingfang ^{[7
]}

Zhu, Junfa ^{[4
]}

Lin, Zhan ^{[1
]}

Zhang, Shanqing ^{[2
,3
]}

机构：

[1] Zhejiang Univ, Coll Chem & Biol Engn, Minist Educ, Key Lab Biomass Chem Engn, Hangzhou 310027, Zhejiang, Peoples R China

[2] Griffith Univ, Ctr Clean Environm & Energy, Environm Futures Res Inst, Brisbane, Qld 4222, Australia

[3] Griffith Univ, Griffith Sch Environm, Brisbane, Qld 4222, Australia

[4] Univ Sci & Technol China, Natl Synchrotron Radiat Lab, Hefei 230029, Peoples R China

[5] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Adv Light Source, Berkeley, CA 94720 USA

[6] Univ Calif Santa Cruz, Dept Chem & Biochem, Santa Cruz, CA 95064 USA

[7] Nanjing Univ, Ecomat & Renewable Energy Res Ctr, Dept Phys, Natl Lab Solid State Microstruct, Nanjing 210093, Jiangsu, Peoples R China

来源：

ADVANCED ENERGY MATERIALS | 2015年 / 5卷 / 21期

基金：

中国国家自然科学基金;

关键词：

HIGH-PERFORMANCE SILICON; HIGH-CAPACITY; ENHANCED CYCLABILITY; BETA-CYCLODEXTRIN; CATHODE; ANODES; GRAPHENE; GUM; NANOCRYSTALS; CHALLENGES;

D O I：

10.1002/aenm.201500878

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070305 [高分子化学与物理];

摘要：

The sulfur cathode in traditional lithium-sulfur batteries suffers from poor cyclability due to polysulfide shuttling effect as well as large volume change during charge/discharge processes. Gum arabic (GA), a low cost, nontoxic, and sustainable natural polymer from Acacia senegal, is adopted as a binder for the sulfur cathode to address these issues. The excellent mechanical properties of GA endow the cathode with high binding strength and suitable ductility to buffer volume change, while the functional groups chemically and physically confine sulfur species within the cathode to inhibit the shuttling effect of polysulfides. Additionally, GA shifts the electrode fabrication process from the organic solvent process to an aqueous process, eliminates the use of toxic organic solvents, and achieves uniformly distributed electrode with lower impedance. A remarkable cycling performance, i.e., 841 mAh g(-1) at low current rate of C/5, is achieved throughout 500 cycles due to the bifunctions of the GA binder.

引用

页数：8

共 44 条

[1]

Abu-Dalo MA, 2012, INT J ELECTROCHEM SC, V7, P9303

[2]

Almuslet N.A., 2012, J. Phys. Sci, V23, P43

[3]

Enhanced cyclability of sulfur cathodes in lithium-sulfur batteries with Na-alginate as a binder [J].