CAJ | 학술논문

选取三种不同的二价锰盐分别与高锰酸钾低温固相反应，制备出不同的纳米二氧化锰电活性材料。采用X射线衍射仪(XRD)、扫描电子显微镜(SEM)与全自动高压物理吸附仪对材料表面的形貌与结构进行了表征，借助循环伏安、恒流充放电和交流阻抗技术测试材料的电化学性能。研究结果表明，二价锰源的阴离子对产物的微观结构和电化学性能均会产生一定影响。其中，由硫酸锰和氯化锰分别与高锰酸钾反应制备的无定形MnO2电极材料比电容较高，而由乙酸锰和高锰酸钾反应制备出的γ-MnO2电极材料具有良好的循环稳定性能，循环800次后，电容保持率可高达95%。
선취삼충불동적이개맹염분별여고맹산갑저온고상반응，제비출불동적납미이양화맹전활성재료。채용X사선연사의(XRD)、소묘전자현미경(SEM)여전자동고압물리흡부의대재료표면적형모여결구진행료표정，차조순배복안、항류충방전화교류조항기술측시재료적전화학성능。연구결과표명，이개맹원적음리자대산물적미관결구화전화학성능균회산생일정영향。기중，유류산맹화록화맹분별여고맹산갑반응제비적무정형MnO2전겁재료비전용교고，이유을산맹화고맹산갑반응제비출적γ-MnO2전겁재료구유량호적순배은정성능，순배800차후，전용보지솔가고체95%。
Three different kinds of bivalent manganese salt were adopted to react with potassium permanganate using a solid state method under low temperature, respectively. Different nanostructured manganese dioxide electroactive materials were prepared. The morphologies and structures of the materials were characterized by X-ray diffractometer (XRD), scanning electron microscope (SEM), and xtended pressure sorption analyzer. Cyclic voltammetry, constant current charge and discharge and electrochemical impedance experiments were adopted to investigate the electrochemical behaviors. The results show that the anion of bivalent manganese source has an effect on the microstructure and electrochemical properties of as-prepared samples. A high specific capacitance was possessed by the amorphous manganese dioxide electrodes prepared from manganese sulfate or manganese chloride. While the cyclability was excellent ofγ-MnO2 which prepared from manganese. The capacitance retention was as high as 95%after 800 cycles.