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Highlights 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… Click to show full abstract
Highlights 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. Electronic supplementary material The online version of this article (10.1007/s40820-020-00539-6) contains supplementary material, which is available to authorized users.
Journal Title: Nano-Micro Letters
Year Published: 2020
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