水热条件下甲酸还原V_2O_5制备钒电解液  

Preparation of vanadium electrolyte by using formic acid-reduction of V_2O_5 with hydrothermal method

作　　者：王大辉[1] 夏缘[1] 王利[1] 陈一博[1] 

机构地区：[1]兰州理工大学材料科学与工程学院,甘肃兰州730050

出　　处：《兰州理工大学学报》2013年第5期61-64,共4页Journal of Lanzhou University of Technology

摘　　要：以V2O5和甲酸为原料,在室温下、水体系中反应制得钒电解液,并以键价理论为基础,对其反应机理进行探讨.采用UV光谱和拉曼光谱对所制备的电解液的价态和浓度以及成键状态进行表征,利用循环伏安对其电化学性能进行测试分析.结果表明,甲酸可以和V2O5以1∶1的物质的量比进行氧化还原反应生成V(Ⅳ)电解液;硫酸会和钒离子形成配合物,提高电解液的稳定性和电化学可逆性;残留的甲酸有利于提高电解液的电导.Vanadium electrolyte was prepared with VzOs and formic acid as its raw materials at indoor temperature in distilled water and its reaction mechanism was explored on the basis of bond valence theo- ry. The valence state, concentration, and bond-formation state of the prepared electrolyte were characterized by using UV and Raman spectrophotometers and its electrochemical performance was tested and analyzed with cyclic voltammetry. The results indicated that V（IV） electrolyte was generated with the oxidation-reduction reaction of vanadium pentoxide and formic acid with mass-ratio of 1 ： 1, sulphuric acid and vanadium-ion could form a stable coordination compound, so that the stability and electrochemical reversi- bility of electrolyte was improved. The residual formic acid was beneficial to improve conductivity of vanadium electrolyte.

关 键 词：钒电解液 键价 水热条件 电化学性能 

分 类 号：O646[理学—物理化学]