中性水溶液高容量TiB_2负极的电氧化反应

王雅东; 光先勇; 王智鑫; 艾新平; 杨汉西

doi:10.61558/2993-074X.1949

电化学 >

2009 , Vol. 15 >Issue 1: 30 - 33

DOI: https://doi.org/10.61558/2993-074X.1949

研究论文

中性水溶液高容量TiB_2负极的电氧化反应

王雅东 ,
光先勇 ,
王智鑫 ,
艾新平 ,
杨汉西

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武汉理工大学材料复合新技术国家重点实验室;武汉大学化学与分子科学学院;

收稿日期: 2009-02-28

修回日期: 2009-02-28

网络出版日期: 2009-02-28

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Electrooxidation Behaviors of TiB_2 as High Capacity Anodic Material in Neutral Aqueous Electrolytes

WANG Ya-dong ,
GUANG Xian-yong ,
WANG Zhi-xin ,
AI Xin-ping ,
YANG Han-xi

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(1.The State Key Laboratory of Advanced Technology for Materials Synthesis and Processing,Wuhan University of Technology;Wuhan 430070,China;2.College of Chemistry and Molecular Sciences,Wuhan University,Wuhan 430072,China

Received date: 2009-02-28

Revised date: 2009-02-28

Online published: 2009-02-28

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摘要

本文报道了TiB2作为阳极材料在中性水溶液中的电化学行为.结果表明TiB2在KF水溶液中释放出超高电化学容量:在电流密度为50 mA/g时,容量可以达到1300 mAh/g,超过目前报道的所有金属电极的容量.在放电过程中,二硼化钛中的硼发生电化学氧化反应生成硼氟酸根,而其中的钛则形成金属单质.因此二硼化钛可以作为一种阳极材料构建高比容量中性化学电源体系.

关键词： 金属硼化物; 中性水溶液; 阳极材料; 电氧化; 水溶液电池体系

本文引用格式

王雅东 , 光先勇 , 王智鑫 , 艾新平 , 杨汉西 . 中性水溶液高容量TiB_2负极的电氧化反应[J]. 电化学, 2009 , 15(1) : 30 -33 . DOI: 10.61558/2993-074X.1949

Abstract

Titanium diborides were investigated as an anodic material for neutral aqueous batteries.It is revealed that this material shows superiorly high electrochemical activities in the neutral electrolytes.The discharge capacities observed for TiB2 reached 1300 mAh/g at the constant current density of 50 mA/g,exceeding all the metal electrodes reported so far.The electrooxidation of this compound was found to proceed via the electrochemical dissolution of boron to form borofluoride,while titanium remained unchanged at the electrode.These results suggest a possible use of the boride compounds as a new material for constructing neutral aqueous batteries with high electrochemical capacity and rate capability.

Key words： metal borides; anodic materials; aqueous batteries; neutral electrolytes; electrooxidation

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