钒电池充电过程中钒价态及其变化的现场分析  

FIELD ANALYSIS OF VALENCY STATE OF VANADIUM DURING THE CHARGING OF VANADIUM BATTERY

作　　者：彭声谦[1] 蔡世明[2] 许国镇[3] 杨华铨[4] 

机构地区：[1]西南工学院资源系,绵阳621002 [2]四川建材地勘总队 [3]中国地质大学 [4]北京大学

出　　处：《理化检验（化学分册）》1998年第7期291-294,共4页Physical Testing and Chemical Analysis(Part B:Chemical Analysis)

基　　金：国家地质矿产部资助项目部分

摘　　要：钒电池是一种具有能充电放电性能的新型二次电池。该电池以硫酸氧钒(VOS0_4)作为电解质,在充电过程阳极半电池中V(Ⅳ)被氧化为V(Ⅴ),阴极半电池中V(Ⅳ)先被还原为V(Ⅲ),然后V(Ⅲ)进一步被还原为V(Ⅱ)。文中研究了用电位滴定对两个半电池中充电时钒价态变化进行测定的方法,并设计了分析装置,实现了分析V(Ⅱ)时的防氧化保护。试验表明,该分析法设备简单、操作简便,易于实现现场快速分析。通过测定,能及时了解电池充电过程中钒不同价态的定量转变情况及其与开路电压的关系,可有效地监测电池的充电效率。All-vanadium redox flow cell is a new energy storage system. The battery employs vanadyl sulphuric acid solution as the electrolyte. During charging of the cell, V(Ⅳ) was oxidised to V ( V ) in the positive compartment, while V ( Ⅳ ) was reduced to V ( I ) and V ( I ) further reduced to V( I ) in the negative compartment. Using potential titration, the change of the oxidation states of vanadium was determined in both half-cell. The equipments of the potential titration and protecting V( I ) from oxidation were also designed. They are quite simple and easy to operate. By using this equipment, field analysis can be effectively performed and the change of valency state of vanadium and, its relation with open-circuit voltage can be measured. The charge efficiency can also be efficiently determined.

关 键 词：钒电池 充电 钒价态 电位滴定 分析 

分 类 号：TM912[电气工程—电力电子与电力传动]