文献类型：期刊文献

英文题名：In Situ Fabrication of Hierarchical CuO@Cu Microspheres Composed of Nanosheets as High-Performance Anode Materials for Lithium-Ion Batteries

作者：Li, Zhimiao[1];Xu, Yunlong[1];Chen, Yue[1];Zhang, Wei[1];Li, Keqiang[1];Zhang, Huang[2,3,4]

机构：[1]East China Univ Sci & Technol, Sch Mat Sci & Engn, 130 Meilong Rd, Shanghai 200237, Peoples R China;[2]Northwestern Polytech Univ, Xian Inst Flexible Elect IFE, 127 West Youyi Rd, Xian 710072, Shaanxi, Peoples R China;[3]HIU, Helmholtzstr 11, D-89081 Ulm, Germany;[4]Karlsruhe Inst Technol, POB 3640, D-76021 Karlsruhe, Germany

年份：2019

卷号：4

期号：46

起止页码：13569

外文期刊名：CHEMISTRYSELECT

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000514099500021)】；

基金：This work is supported by Shanghai Nanotechnology Special Foundation (No. 11 nm0500900), Shanghai Leading Academic Discipline Project (B502) and Shanghai Key Laboratory Project (08DZ2230500). H.Z. acknowledges the financial support from the Fundamental Research Funds for the Central Universities (31020190QD029).

语种：英文

外文关键词：Copper oxide; Hierarchical structure; Lithium-ion battery; Microspheres; Nanosheets

摘要：Transition metal oxides have been regarded as promising anode candidates for high-energy lithium-ion batteries. Herein, we report the fabrication of hierarchical CuO@Cu microspheres composed of nanosheets by an in-situ oxidation process for lithium-ion batteries. As anodes, the composite delivers a reversible specific capacity of 850 mAh g(-1) at 100 mA g(-1), and maintains at 643 mAh g(-1) at 1 A g(-1) for 600 cycles. The superior reversible capacity and cycling stability of the CuO@Cu microspheres can be attributed to their unique hierarchical structure, which not only alleviates the structural variation, shortens the ion diffusion length upon cycling, but also improves the electrical conductivity with remained metallic Cu. The presented results offer an efficient way to design hierarchical micro-nanostructure for high-performance anode materials in lithium-ion batteries.