优化TiO2纳米管形貌以构建高性能超级电容器电极

O646; 该文研究了电化学参数对于阳极氧化TiO2纳米管的形貌调控作用,以及修饰改性对TiO2纳米管电化学性能的影响.湿度是决定能否成功制备样品的关键因素,当相对湿度低于70％时,可得到完好的TiO2纳米管膜层.通过改变氧化电压和时间,可调控TiO2纳米管的管径和管长.此外,通过电化学自掺杂和在纳米管的表面负载Pt金属颗粒对TiO2纳米管进行修饰,提升了超级电容器的性能.对于经自掺杂100 V电压氧化3 h的样品,在100 mV/s的扫描速率下,其比容量达到2.576 mF/cm2,经过5000次循环,其容量保持率仍达到89.55％,呈现优异的倍率性能.经Pt修饰的样品,在相同的扫描速率下,...

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Published in东华大学学报（英文版） Vol. 41; no. 4; pp. 377 - 387
Main Authors 王瑾, 陈广冰, 王春瑞, 李惠
Format Journal Article
LanguageChinese
Published 东华大学物理学院,上海 201620 2024
Subjects
anodization
conductivity
阳极氧化
超级电容器
导电性
TiO2 nanotube
TiO2纳米管
supercapacitor
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Abstract O646; 该文研究了电化学参数对于阳极氧化TiO2纳米管的形貌调控作用,以及修饰改性对TiO2纳米管电化学性能的影响.湿度是决定能否成功制备样品的关键因素,当相对湿度低于70％时,可得到完好的TiO2纳米管膜层.通过改变氧化电压和时间,可调控TiO2纳米管的管径和管长.此外,通过电化学自掺杂和在纳米管的表面负载Pt金属颗粒对TiO2纳米管进行修饰,提升了超级电容器的性能.对于经自掺杂100 V电压氧化3 h的样品,在100 mV/s的扫描速率下,其比容量达到2.576 mF/cm2,经过5000次循环,其容量保持率仍达到89.55％,呈现优异的倍率性能.经Pt修饰的样品,在相同的扫描速率下,其比容量高达3.486 mF/cm2,展现出更为出色的电化学性能.
AbstractList O646; 该文研究了电化学参数对于阳极氧化TiO2纳米管的形貌调控作用,以及修饰改性对TiO2纳米管电化学性能的影响.湿度是决定能否成功制备样品的关键因素,当相对湿度低于70％时,可得到完好的TiO2纳米管膜层.通过改变氧化电压和时间,可调控TiO2纳米管的管径和管长.此外,通过电化学自掺杂和在纳米管的表面负载Pt金属颗粒对TiO2纳米管进行修饰,提升了超级电容器的性能.对于经自掺杂100 V电压氧化3 h的样品,在100 mV/s的扫描速率下,其比容量达到2.576 mF/cm2,经过5000次循环,其容量保持率仍达到89.55％,呈现优异的倍率性能.经Pt修饰的样品,在相同的扫描速率下,其比容量高达3.486 mF/cm2,展现出更为出色的电化学性能.
Abstract_FL This article studies the role of electrochemical parameters in controlling the morphology of oxidized TiO2 nanotubes and the electrochemical performance of modified TiO2 nanotubes.Humidity is a key factor for fabricating TiO2 nanotubes.When the relative humidity belows 70％,the TiO2 nanotubes can be successfully prepared.What's more,by changing the anodization voltage and time,the diameter and the length of TiO2 nanotubes can be adjusted.In addition,the TiO2 nanotubes are modified through electrochemical self-doping and loading Pt metal particles on the surface of the nanotubes,which promotes the performance of the supercapacitor.The sample anodized at 100 V for 3 h has a specific capacity of up to 2.576 mF/cm2 at a scan rate of 100 mV/s after self-doping,and its capacity retention rate still remains at 89.55％after 5 000 cycles,demonstrating excellent cycling stability.The Pt-modified sample has a specific capacity of up to 3.486 mF/cm2 at the same scan rate,exhibiting more outstanding electrochemical performance.
Author 陈广冰
王春瑞
王瑾
李惠
AuthorAffiliation 东华大学物理学院,上海 201620
AuthorAffiliation_xml – name: 东华大学物理学院,上海 201620
Author_FL WANG Chunrui
CHEN Guangbing
LI Hui
WANG Jin
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  fullname: 陈广冰
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  fullname: 王春瑞
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  fullname: 李惠
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DocumentTitle_FL Morphology Control of TiO2 Nanotubes towards High-Efficient Electrodes for Supercapacitor
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Keywords anodization
conductivity
阳极氧化
超级电容器
导电性
TiO2 nanotube
TiO2纳米管
supercapacitor
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Title 优化TiO2纳米管形貌以构建高性能超级电容器电极
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