材料科学
阳极
溶解
硫化物
硫化镍
纳米颗粒
图层(电子)
化学工程
涂层
碳纤维
硫化铅
纳米技术
电池(电)
镍
碳纳米管
电化学
电极
冶金
复合材料
化学
物理
功率(物理)
量子点
复合数
量子力学
物理化学
工程类
作者
Feipeng Zhao,Qiufang Gong,Brian Traynor,Duo Zhang,Jiaojiao Li,Hualin Ye,Fengjiao Chen,Ning Han,Yeyun Wang,Xuhui Sun,Yanguang Li
出处
期刊:Nano Research
[Springer Nature]
日期:2016-08-08
卷期号:9 (10): 3162-3170
被引量:65
标识
DOI:10.1007/s12274-016-1198-3
摘要
Nanostructured metal sulfides are potential electrode materials for sodium-ion batteries; however, they typically suffer from very poor cycling stability due to large volume changes and dissolution of discharge products. Herein we propose a rational material design strategy for sulfide-based materials to address these problems. Taking nickel sulfide (NiS
x
) as an example, we demonstrated that its electrochemical performance can be dramatically improved by confining the NiSx nanoparticles in a percolating conductive carbon nanotube network, and stabilizing them with an ultrathin carbon coating layer. The carbon layer serves as a physical barrier to alleviate the effects of both the volume change and dissolution of active materials. The hybrid material exhibited a large reversible specific capacity of >500 mAh/g and excellent cycling stability over 200 cycles. Given the traditionally problematic nature of NiS
x
as a battery anode material, we believe that the observed high performance reported here reflects the effectiveness of our material design strategy.
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