阳极
异质结
材料科学
电化学
锡
化学工程
储能
纳米技术
碳纤维
电极
离子
复合数
光电子学
复合材料
化学
冶金
量子力学
物理
工程类
物理化学
功率(物理)
有机化学
作者
Jiamin Lu,Shuyang Zhao,Shaoxun Fan,Qian Lv,Jia Li,Ruitao Lv
出处
期刊:Carbon
[Elsevier BV]
日期:2019-03-13
卷期号:148: 525-531
被引量:85
标识
DOI:10.1016/j.carbon.2019.03.022
摘要
Sodium-ion batteries (SIBs) have attracted tremendous attention as next-generation high-performance and low-cost energy storage devices. However, achieving both high capacity and good cycling performance is still challenging. Tin sulfides are promising SIB anode materials but usually demonstrate a capacity much lower than theoretical values and suffer from large volume expansion during charge-discharge process. Herein, SnS/SnS2 heterostructures are vertically grown on carbon cloth substrates and used as a binder-free self-supporting anode, exhibiting a high Na+ storage capacity (>800 mAh g−1 at 200 mA g−1) and good cycling performance (>400 mAh g−1 after 1000 cycles at 1 A g−1). The excellent sodium-ion storage performance can be attributed to the enhanced charge-transfer kinetics by the SnS/SnS2 heterostructure, the hierarchical structure composed of uniform nanohoneycomb-like SnS/SnS2 structure and the carbon cloth as the self-supporting framework. The superior electrochemical performance by forming heterostructures may inspire the rational design of layered materials for high-performance SIB applications.
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