Chitosan as a functional additive for high-performance lithium-sulfur batteries

被引：96

作者：

Chen, Yilei ^{[1
]}

Liu, Naiqiang ^{[1
]}

Shao, Hongyuan ^{[1
]}

Wang, Weikun ^{[2
]}

Gao, Mengyao ^{[1
]}

Li, Chengming ^{[1
]}

Zhang, Hao ^{[2
]}

Wang, Anbang ^{[2
]}

Huang, Yaqin ^{[1
]}

机构：

[1] Beijing Univ Chem Technol, Beijing Lab Biomed Mat, State Key Lab Chem Resource Engn, 15 BeiSanhuan East Rd, Beijing 100029, Peoples R China

[2] Res Inst Chem Def, Beijing 100191, Peoples R China

来源：

JOURNAL OF MATERIALS CHEMISTRY A | 2015年 / 3卷 / 29期

基金：

美国国家科学基金会;

关键词：

POROUS CARBON NANOTUBES; POLYSULFIDE SHUTTLE; CAPACITY; BINDER; CATHODE; COMPOSITE; ELECTRODE;

D O I：

10.1039/c5ta03032c

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：

Chitosan with abundant hydroxyl and amine groups as an additive for cathodes and separators has been proven to be an effective polysulfide trapping agent in lithium-sulfur batteries. Compared with common sulfur cathodes, the cathode with chitosan shows an enhanced initial discharge capacity from 950 to 1145 mA h g(-1) at C/10. The reversible specific capacity after 100 cycles increases from 508 mA h g(-1) to 680 mA h g(-1) and 473 to 646 mA h g(-1) at rates of C/2 and 1 C, respectively. In addition, batteries with separators that are coated with a carbon/chitosan layer can exhibit a high discharge capacity of 830 mA h g(-1) at C/2 after 100 cycles and 675 mA h g(-1) at 1 C after 200 cycles with the capacity fading to as low as 0.11% per cycle. This study demonstrates the benefits of using chitosan for not only lithium-sulfur batteries but also potentially other sulfur-based battery applications.

引用

页码：15235 / 15240

页数：6

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