期刊论文

Wu Xiongwei

中文

化学学报

0567-7351

2011

69

16

1858-1864

国家重点基础研究发展计划（973计划 No.2010CB227201） 国家自然科学基金（No.50972165） 米塔尔创新基金（Nos.09MX19 10MX01）资助项目

本校为其他机构

以冶金级V_2O_3和V_2O_5为原料,采用混合加热和自催化强化溶解相结合的方法制备钒电解液.通过热力学分析,从理论上计算并确定了V_2O_5和V_2O_3溶解过程中在硫酸溶液中的离子存在形式,从而计算了钒电解液VOSO_4过程的吉布斯自由能变化△_rG_m,以及相应的反应生成焓△_rH_m.结果表明:反应为放热反应,且为自发过程(△_rG_m＜0).同时通过 UV-Vis光谱对所制备的电解液存在形式进行表征,证实了理论分析的正确性;使用循环伏安和充放电对其电化学性能予以分析,所得钒电解液具有很好的电化学性能.

The vanadium solution was prepared by heating the mixture of vanadium trioxide and vanadium pentoxide in sulfuric acid solution, which utilized the autocatalytic effect of vanadium with mixed valence, to intensify the dissolving of the mixture of vanadium trioxide and vanadium pentoxide. The formations of vanadium ions were theoretically determined. Moreover, negative Delta(r)G(m) and Delta H-r(m) of the reactions were calculated by thermomechanical analysis. The reactions was proved to be a spontaneous process (Delta(r)G(m)