Porous CuO nanotubes/graphene with sandwich architecture as high-performance anodes for lithium-ion batteries

Shuning Xiao; Donglai Pan; Liangjun Wang; Zhengzhong Zhang; Zhiyang Lyu; Wenhao Dong; Xiaolang Chen; Dieqing Zhang; Wei Chen; Hexing Li

doi:10.1039/c6nr07802h

Porous CuO nanotubes/graphene with sandwich architecture as high-performance anodes for lithium-ion batteries

Nanoscale. 2016 Nov 24;8(46):19343-19351. doi: 10.1039/c6nr07802h.

Authors

Affiliations

¹ Education Ministry Key Lab of Resource Chemistry, Shanghai Key Laboratory of Rare Earth Functional Materials, International Joint Lab of Resource Chemistry SHNU-NUS-PU, Department of Chemistry, Shanghai Normal University, Shanghai 200234, China. dqzhang@shnu.edu.cn Hexing-li@shnu.edu.cn phycw@nus.edu.sg and Department of Chemistry, National University of Singapore, 3 Science Drive 3, 117543 Singapore, Singapore.
² Education Ministry Key Lab of Resource Chemistry, Shanghai Key Laboratory of Rare Earth Functional Materials, International Joint Lab of Resource Chemistry SHNU-NUS-PU, Department of Chemistry, Shanghai Normal University, Shanghai 200234, China. dqzhang@shnu.edu.cn Hexing-li@shnu.edu.cn phycw@nus.edu.sg.
³ Department of Physics, National University of Singapore, 2 Science Drive 3, 117542 Singapore, Singapore.
⁴ Department of Chemistry, National University of Singapore, 3 Science Drive 3, 117543 Singapore, Singapore.
⁵ Education Ministry Key Lab of Resource Chemistry, Shanghai Key Laboratory of Rare Earth Functional Materials, International Joint Lab of Resource Chemistry SHNU-NUS-PU, Department of Chemistry, Shanghai Normal University, Shanghai 200234, China. dqzhang@shnu.edu.cn Hexing-li@shnu.edu.cn phycw@nus.edu.sg and Department of Chemistry, National University of Singapore, 3 Science Drive 3, 117543 Singapore, Singapore and Department of Physics, National University of Singapore, 2 Science Drive 3, 117542 Singapore, Singapore.

PMID: 27841893
DOI: 10.1039/c6nr07802h

Abstract

Constructing a porous conductive framework represents a promising strategy for designing high-performance anodes for Li-ion batteries. Here, porous CuO nanotubes/graphene with hierarchical architectures were fabricated by simple annealing of copper nanowires/graphene hybrids synthesized by a microwave-assisted process. In these nanoarchitectures, the embedded porous CuO nanotubes can prevent restacking of the graphene sheets, whereas graphene can increase the electrical conductivity of CuO. Moreover, these two components constitute a sandwich-like interlaced framework that favors ion diffusion, as well as promoting better electron transport. As a result, the as-prepared nanohybrid exhibits a high specific capacity of 725 mA h g^-1 and a capacity retention of ∼81% after 250 cycles, as well as outstanding rate performance in comparison to those of bare CuO or a CuO-CNT (carbon nanotubes) hybrid.