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MOF-Derived CoSe 2 @N-Doped Carbon Matrix Confined in Hollow Mesoporous Carbon Nanospheres as High-Performance Anodes for Potassium-Ion Batteries
Nano-Micro Letters ( IF 26.6 ) Pub Date : 2020-10-27 , DOI: 10.1007/s40820-020-00539-6
Su Hyun Yang 1 , Seung-Keun Park 2 , Yun Chan Kang 1
Affiliation  

  • A novel vacuum-assisted strategy is proposed to form N-doped carbon-encapsulated CoSe2 nanocrystals within hollow mesoporous carbon nanospheres (CoSe2@NC/HMCS) via a solid-state reaction.

  • The “dual confinement” by both the N-doped carbon matrix derived from 2-methylimidazole and the small-sized pores of the hollow mesoporous carbon nanospheres can effectively prevent the overgrowth of CoSe2 nanocrystals.

  • CoSe2@NC/HMCS exhibits an excellent electrochemical performance as the anode material for KIBs in terms of cycling stability and rate capability.



中文翻译:

MOF 衍生的 CoSe 2 @N 掺杂碳基体被限制在中空介孔碳纳米球中作为钾离子电池的高性能阳极

  • 提出了一种新颖的真空辅助策略,通过固态反应在中空介孔碳纳米球(CoSe 2 @NC/HMCS)内形成氮掺杂碳封装的CoSe 2纳米晶体。

  • 2-甲基咪唑衍生的N掺杂碳基体和中空介孔碳纳米球的小尺寸孔的“双重限制”可以有效防止CoSe 2纳米晶体的过度生长。

  • CoSe 2 @NC/HMCS 作为 KIB 负极材料在循环稳定性和倍率性能方面表现出优异的电化学性能。

更新日期:2020-10-30
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