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Porous Co 3 O 4 /CuO Composite Assembled from Nanosheets as High‐Performance Anodes for Lithium‐Ion Batteries
Author(s) -
Hao Qin,
Zhao Dianyun,
Duan Huimei,
Xu Caixia
Publication year - 2015
Publication title -
chemsuschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.412
H-Index - 157
eISSN - 1864-564X
pISSN - 1864-5631
DOI - 10.1002/cssc.201403420
Subject(s) - anode , nanocomposite , materials science , faraday efficiency , bimetallic strip , lithium (medication) , electrochemistry , microstructure , chemical engineering , ternary operation , alloy , oxide , composite number , electrode , nanotechnology , composite material , metallurgy , chemistry , metal , medicine , engineering , endocrinology , computer science , programming language
Upon dealloying a carefully designed CoCuAl ternary alloy in NaOH solution at room temperature, a Co 3 O 4 /CuO nanocomposite with an interconnected porous microstructure assembled by a secondary structure of nanosheets was successfully fabricated. By using the dealloying strategy, the target metals directly grew to form uniform bimetallic oxide nanocomposites. Owing to the unique hierarchical structure and the synergistic effect of both active electrode materials, the Co 3 O 4 /CuO nanocomposite exhibits much enhanced electrochemical performance with higher capacities and better cycling stability compared to anodes of pure Co 3 O 4 . Moreover, it performs excellently in terms of cycle reversibility, Coulombic efficiency, and rate capability, at both low or high current rates. With the advantages of unique performance and ease of preparation, the as‐made Co 3 O 4 /CuO nanocomposite demonstrates promising application potential as an advanced anode material for lithium‐ion batteries.