石墨烯
甲酸
材料科学
阳极
氧化物
锂(药物)
循环伏安法
电化学
化学工程
无机化学
纳米技术
化学
电极
有机化学
医学
物理化学
内分泌学
工程类
冶金
作者
Hana Noh,Wonchang Choi
出处
期刊:Journal of The Electrochemical Society
[The Electrochemical Society]
日期:2016-01-01
卷期号:163 (6): A1042-A1049
被引量:45
摘要
Micron-sized TiNb2O7 (TNO), composed of nano-scaled primary particles, was synthesized using formic acid and a hydrothermal reaction. The TNO microsphere was optimized using formic acid and then wrapped with a graphene oxide (GO) layer using cetyltrimethylammonium bromide (CTAB) surfactants. It was then heat treated in a reducing atmosphere to yield a reduced graphene oxide-wrapped TNO microsphere (rGO-wrapped TNO microsphere) which exhibited superior rate capabilities and cyclability for anode materials in lithium ion batteries. In-depth electrochemical evaluations, including cyclic voltammetry and impedance studies, reveal that both rGO wrapping and the presence of a controlled TNO microsphere improve the electronic conductivity and lithium ion diffusivity of anodes.
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