CeO2 nanodots decorated ketjen black for high performance lithium-sulfur batteries

被引：25

作者：

Qian, Xinye ^{[1
,3
]}

Jin, Lina ^{[1
]}

Zhu, Lin ^{[1
]}

Yao, Shanshan ^{[1
]}

Rao, Dewei ^{[1
]}

Shen, Xiangqian ^{[1
]}

Xi, Xiaoming ^{[2
]}

Xiao, Kesong ^{[2
]}

Qin, Shibiao ^{[2
]}

机构：

[1] Jiangsu Univ, Coll Mat Sci & Engn, Inst Adv Mat, Zhenjiang 212013, Peoples R China

[2] Changsha Res Inst Min & Met, Hunan Engn Lab Power Battery Cathode Mat, Changsha 410012, Hunan, Peoples R China

[3] Nanjing Univ, Lab Solid State Microstruct, Nanjing 210093, Jiangsu, Peoples R China

来源：

RSC ADVANCES | 2016年 / 6卷 / 112期

基金：

中国博士后科学基金; 中国国家自然科学基金;

关键词：

LI/DISSOLVED POLYSULFIDE BATTERIES; ELECTROCHEMICAL PROPERTIES; CARBON; CATHODE; CHEMISTRY; CAPACITY;

D O I：

10.1039/c6ra24156e

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

A CeO2 nanodots decorated ketjen black composite was fabricated by a simple wet impregnation method and used as the host of sulfur for a lithium-sulfur battery. The microstructure and chemical components were evaluated by XRD, SEM, TEM, surface area analysis and thermogravimetric analysis. Electrochemical tests and microanalysis demonstrated that CeO2 nanodots served as the sulfur fixation spots as well as the catalytic agent compared with the reference sample without CeO2 nanodots. The CeO2/KB-S cathode material with the CeO2/KB mass ratio of approximately 15/85 shows a high initial discharge capacity of 905 mA h g(-1) at the current rate of 1C and remains at 710 mA h g(-1) after 300 cycles. Furthermore, the CeO2/KB-S cathode shows a promising rate performance with the discharge capacity of 800 mA h g(-1) even at the current rate of 2C.

引用

页码：111190 / 111196

页数：7

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