阳极
材料科学
钴
碳纤维
纳米颗粒
电化学
氧化钴
化学工程
金属有机骨架
多孔性
氧化物
纳米技术
电极
化学
复合材料
冶金
复合数
有机化学
吸附
物理化学
工程类
作者
Achmad Yanuar Maulana,Byungsu Kim,Jae-Hyun Shim,Chaeeun Lee,Jungwook Song,Da-Won Lee,Boram Yun,Hyunjeong Gim,Cybelle F. Futalan,Jongsik Kim
标识
DOI:10.1016/j.jallcom.2022.164645
摘要
Recently, cobalt (II, III) oxide (Co3O4) is considered as an alternative anode material for high-performance LIBs because of its high safety and theoretical capacity (890 mAh g−1). However, Co3O4 anode materials suffer from low conductivity and poor cycle life due to structural strain and huge volume change during lithiation/delithiation processes. In this work, porous N-doped graphitic carbon encapsulated Co3O4 structure (Co3O4 @PNGC) was synthesized by using mixed Zn and Co metal-organic frameworks templates (ZIF-67/ZIF-8) and coated with polydopamine as a nitrogen and carbon source. During the synthesis, Zn species was evaporated to form the structural pores, and the in-situ formation of Co(0) occurred that served as a catalyst in the graphitization of the carbon matrix. The Co3O4/PNGC exhibited an improved discharge capacity of 847.4 mAh g−1 after 500 cycles at 1 C when compared to the bare sample.
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