KMnO_4掺杂K_2FeO_4碱性固态电解质电池电化学性能研究  

Study on the Eelectrochemical Performance of KMnO_4K_2FeO_4 Mixed Electrode in Alkaline Solid-state Battery

作　　者：王妍妍[1] 孙秋丽[1] 王永龙[1] 曹建胜[1] 叶世海[1] 

机构地区：[1]南开大学新能源材料化学研究所,天津300071

出　　处：《南开大学学报（自然科学版）》2009年第3期81-85,共5页Acta Scientiarum Naturalium Universitatis Nankaiensis

基　　金：国家自然科学基金(20773070);天津市自然科学基金(06YFJMJC05200)

摘　　要：应用次氯酸盐氧化法制备出了纯度较高的K_2FeO_4,并通过XRD、SEM测试对其结构和形貌进行了表征。将KMnO_4与K_2FeO_4进行机械复合制得KMnO_(4-)K_2FeO_4复合电极用于改善K_2FeO_4-Zn碱性固态电解质电池的放电性能,电化学测试结果表明,添加量为5%时改性效果最佳,KMnO_4可将放电过程中电极表面富集的Fe(Ⅲ)重新氧化为Fe(Ⅵ),可以有效的提高K_2FeO_4的3e转移,优化K_2FeO_4放电过程中的传质、传荷过程,从而提高其放电容量。K2FeO4 with high purity was synthesized using hypochlorite oxidation method. The morphology and structure of product was characterized by XRD and SEM. KMnO4- K2FeO4 mixed electrode was employed to alkaline solid-state battery to improve the discharge properties. The test results exhibit that the best ratio of KMnO4 added to K2FeO4 is 5% and Fe （Ⅲ） enriched on the surface of the electrode during discharge process can be oxidated to Fe （ Ⅵ ） again by KMnO4. The transmission of charge and reactant were optimized in the discharge process and the discharge capacity is obviously improved.

关 键 词：K2FeO4 KMNO4 高铁酸盐 放电性能 

分 类 号：O611.4[理学—无机化学]