阳极
材料科学
磁黄铁矿
介电谱
循环伏安法
纳米复合材料
钠离子电池
电极
化学工程
电池(电)
硫化物
复合数
电化学
纳米技术
复合材料
冶金
化学
法拉第效率
物理化学
功率(物理)
工程类
物理
量子力学
作者
Ganesh Kumar Veerasubramani,Myung Soo Park,Jin Yi Choi,Yun‐Sung Lee,Sang‐Jae Kim,Dong Won Kim
出处
期刊:ACS Sustainable Chemistry & Engineering
[American Chemical Society]
日期:2019-01-29
卷期号:7 (6): 5921-5930
被引量:39
标识
DOI:10.1021/acssuschemeng.8b05904
摘要
Conversion-based transition metal sulfide compounds have been considered as a promising anode material for sodium-ion batteries (SIBs). The major obstacle of these conversion-type anode materials is a large volume change in the course of sodium-ion conversion, which deteriorates their structural stability. Herein, we report a rational combination of pyrrhotite Fe1–xS with alabandite MnS as an anode material with the subsided structural degradation and improved storage ability for SIB. Impressively, the Fe1–xS/MnS composite electrode initially delivered a discharge capacity of 602 mAh g–1 at 100 mA g–1 with good cycling stability and excellent rate capability, which reveals its enhanced sodium-ion storage capacity as compared to its pristine electrodes (Fe1–xS, MnS). Electrochemical impedance spectroscopy and cyclic voltammetry analyses demonstrate the enhanced rate performance and improved cycling stability of the Fe1–xS/MnS composite electrode as well as better pseudocapacitive contribution. The cooperative effect of the Fe1–xS/MnS composite anode makes it as a promising anode material for SIBs.
科研通智能强力驱动
Strongly Powered by AbleSci AI