材料科学
电解质
电化学
阳极
钠
氮气
碳纤维
钾
化学工程
镍
钠离子电池
兴奋剂
储能
电导率
纳米技术
化学
电极
冶金
复合材料
光电子学
有机化学
复合数
工程类
功率(物理)
物理
物理化学
法拉第效率
量子力学
作者
Shikai Xu,Zhiqiang Li,Kainian Chu,Yufeng Ge,Yang Xu,Ping Niu,Yang Yang,Qianwang Chen,Fangcai Zheng
出处
期刊:ACS applied energy materials
[American Chemical Society]
日期:2021-01-05
卷期号:4 (1): 662-670
被引量:17
标识
DOI:10.1021/acsaem.0c02546
摘要
Although nickel sulfides with high theoretical capacities have been demonstrated as promising anodes for sodium/potassium ion batteries (SIBs/KIBs), they always suffer from large volume expansion and inferior electronic conductivity, resulting in irreversible capacity loss. In this work, we design and prepare NiS nanosheets attached to the inner surface of the hole in nitrogen-doped carbon matrixes (h-NiS@N-C), which could provide much more exposed active sites for electrochemical reactions for SIBs and KIBs. The void space in nitrogen-doped carbon matrixes not only could largely buffer volume expansion of NiS nanosheets but also could store the electrolyte and shorten the diffusion distance for ions during the discharge/charge process. The h-NiS@N-C exhibits a reversible capacity of 510 and 500 mA h g–1 after 200 cycles at 100 mA g–1 for SIBs and KIBs, respectively. When tested at a high current density of 1 A g–1, it displays a long-term cycling stability over 1000 cycles with a capacity of 290 and 260 mA h g–1 for SIBs and KIBs, respectively. Furthermore, the sodium full battery performance suggests that the h-NiS@N-C has application potential for energy-storage devices.
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