典型文献
The storage mechanism difference between amorphous and anatase as supercapacitors
文献摘要：
Although TiO2 nanotubes is a promising electrode as supercapacitors due to its high energy density, easy synthesis and chemical stability, there are draw backs such as low conductivity and capacitance. Many studies concentrated on improving its electrochemical performance itself but little attention was payed to the reason of capacitance differences caused by its different crystal structures. Herein, we prepare amorphous and anatase TiO2 nanotubes and hydrogenated them by a simple electrochemical hydrogenation method to improve their conductivity and capacitance. And then study and compare their morphology and structure differences by SEM, TEM, XRD and BET. The results show that the pore size distribution, internal structure order and internal carrier concentration are the main reasons for their electrochemical performance differences. The microporous structure less than 2 nm in amorphous nanotubes act as a trap of electrolyte ions at current density larger than 0.1μA cm-2, leading to small charge and discharge capacitance. The long-range ordered crystal structure of anatase is more favorable for the orderly diffusion of carriers, reducing the inelastic scattering of carrier diffusion process and the electron hole-complexing probability, making anatase nanotubes exhibit higher coulomb efficiency and cycle stability than that of amorphous ones.
文献关键词：
中图分类号：
作者姓名：
Wanggang Zhang;Yiming Liu;Zhiyuan Song;Changwan Zhuang;Aili Wei
作者机构：
College of Materials Science and Engineering,Taiyuan University of Technology,Taiyuan,Shanxi,030024,China;Shanxi Academy of Analytical Sciences,Taiyuan,Shanxi,030006,China
文献出处：
引用格式：
[1]Wanggang Zhang;Yiming Liu;Zhiyuan Song;Changwan Zhuang;Aili Wei-.The storage mechanism difference between amorphous and anatase as supercapacitors)[J].绿色能源与环境（英文）,2022(01):156-164
A类：
payed
B类：
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AB值：
0.572311
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