多孔氧化镍纳米颗粒的制备及其电化学性能研究
Preparation and electrochemical performance of porous NiO nanoparticles for lithium ion batteries
黄涛 1李晓娜 2杨则恒1
作者信息
- 1. 合肥工业大学化学与化工学院,安徽合肥230009
- 2. 中国科学技术大学化学与材料科学学院,安徽合肥230026
- 折叠
摘要
通过简单的热分解前驱化合物的方法制备了多孔氧化镍纳米颗粒,产物由具有多孔的纳米颗粒组成.通过循环伏安和恒流充放电技术表征了多孔氧化镍纳米颗粒电极的电化学性能.结果显示多孔氧化镍纳米颗粒展现出优异的电化学性能:高的比容量、循环性能以及倍率性能.500 mA/g电流密度下循环120圈,其比容量能保持在835mA h/g.多孔结构的引入增加了电极和电解液之间的接触面积,同时提供空间来缓解循环过程中引起的体积膨胀效应,从而提高了电化学性能.
Abstract
Porous NiO nanoparticles were synthesized via a facile thermal decomposition method by only using a simple compound precursor.The as-prepared NiO samples are composed of nanoparticles with large pore volume.The electrochemical properties of the porous NiO nanoparticles were examined by cyclic voltammetry and galvanostatic charge-discharge studies.The results demonstrate that the as-prepared NiO nanoparticles are excellent electrode materials in LIBs(lithium ion batteries) with high specific capacity,good retention and rate performance.The porous NiO nanoparticles can retain a reversible capacity of 835 mAh/g after 120 cycles at a high current density of 500 mA/g.The introduction of porous structure into the NiO electrodes offers a large contact area between the electrode and electrolyte,and provides space for buffering the strain during cycling,thus leading to enhanced lithium-storage properties.
关键词
氧化镍/锂离子电池/多孔/负极材料/丁二酮肟Key words
NiO/lithium ion battery/porous/anode material/nickel dimethylglyoxime引用本文复制引用
出版年
2017
NETL
NSTL
维普
万方数据