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论文类型：期刊论文

发表时间：2017-01-01

发表刊物：CHEMELECTROCHEM

收录刊物：SCIE、EI、Scopus

卷号：4

期号：1

页面范围：102-108

ISSN号：2196-0216

关键字：cobalt; doping; hollow structures; lithium-ion batteries; nanostructures

摘要：Despite a high theoretical specific capacity (890mAhg(-1)) as an anode material for Li-ion batteries, Co3O4 has not been used in practice due to its inferior mechanical stability and poor electrical conductivity. Herein, we synthesized three-dimensional (3D) flower-like nanocomposites consisting of nitrogen-doped carbon nanosheets decorated with hollow Co3O4 nanospheres (H-Co3O4@N-CNSs) with an ultrahigh loading mass (83wt%) of Co3O4. The H-Co3O4@N-CNSs exhibited excellent performance of 750mAhg(-1) at 500mAg(-1) and 700mAhg(-1) at 1000mAg(-1) after 400cycles and a high capacity retention rate of 93.75% at 500mAg(-1). This excellent electrochemical performance was attributed to a synergistic effect between the hollow Co3O4 nanospheres, the N-doped carbon nanosheets, and the pores between adjacent carbon nanosheets. Our suggested fabrication strategy for creating a hierarchical structure has great potential for the design of high-performance anode materials.