K_2FeO_4电极的放电机制探讨  

Research on the Discharge Mechanism of K2FeO4 Electrode

作　　者：杨卫华[1] 

机构地区：[1]华侨大学材料科学与工程学院,福建泉州362021

出　　处：《华侨大学学报（自然科学版）》2008年第1期46-48,共3页Journal of Huaqiao University(Natural Science)

基　　金：国家自然科学基金资助项目(20575023);福建省自然科学基金计划资助项目(D0540003)

摘　　要：采用三电极体系法,通过分析K2FeO4电极的间歇放电及电极在10 mol.L-1KOH溶液中的循环伏安行为,了解K2FeO4电极的放电机制.比较K2FeO4电极放电前后的X射线衍射结果,表明K2FeO4的放电机制为固-固放电,K2FeO4的放电过程分两步进行,即Fe(Ⅵ)→Fe(Ⅴ)→Fe(Ⅲ).其放电产物形式比较复杂,最终可能转化为FeOOH,且在放电过程中,OH-,H2O等作为反应物或产物可能参与了放电过程.In order to understand the discharge mechanism of K2FeO4 electrode, the intermittent discharge and cycle voltammetry （CV） behavior of K2FeO4 electrode using 10 mol·L^-1 KOH solution as electrolyte in a three-electrode system was investigated in this paper. By comparing the XRD results before and after discharge of K2FeO4 electrode, it is clear that the discharge process is a solid-solid course and may contain two steps, that is, Fe（Ⅵ）→Fe（Ⅴ）→Fe（Ⅲ）. The discharge product of K2FeO4 are very complex and maybe translate into FeOOH ultimately. OH^-, H2O and so on may participate in the discharge process as reactants or productions.

关 键 词：K2FeO4 放电机制 循环伏安行为 间歇放电 

分 类 号：O646.54[理学—物理化学]