期刊
JOURNAL OF POWER SOURCES
卷 195, 期 1, 页码 313-319出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jpowsour.2009.07.022
关键词
Copper oxide; Morphology; Self-assembled; Anode; Lithium ion battery
We report a simple self-assembled synthesis of hierarchical CuO particles with various morphologies such as leaf, shuttle, flower, dandelion, and caddice clew. The morphologies can be easily tailored by adjusting the pH value. The synthesis is based on dehydration and re-crystallization of precursor Cu(OH)(2) nanowires. [Cu(NH3)(4)](2+) and OH-in the solutions are considered as the key factors to influence the assembling manner of CuO. The obtained hierarchical CuO particles serve as a good model system for the study as anodes for lithium ion batteries. Various morphologies of CuO particles result in different electrochemical performances of electrodes. Compared to others, dandelion-like and caddice clew-like CuO exhibit reversible discharge capacities of 385 mAh g(-1) and 400 mAh g(-1) at 0.1 C, 340 mAh g(-1) and 374 mAh g(-1) at 0.5 C after 50 cycles, respectively. The higher discharge capacities and better cycling performances are attributed to their larger surface area and porosity, leading to better contact between CuO and electrolyte and shorter diffusion length of lithium ions. (C) 2009 Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据