La-doped nano manganese dioxide active electrode material was prepared by sol-gel method.The effects of acid treatment,temperature and lanthanum nitrate content on the morphology and properties of nano-MnO2 were studied respectively.The results showed that acidification and lanthanum doping were effective means to improve the electrochemical activity of nano-MnO2,acidification can reduce the particle size and improved the loose degree.Doping can optimize the crystal structure and enhanced the specific capacitance for nano-MnO2.When the calcination temperature was 300℃,the molar ratio of lanthanum nitrate and acetic acid manganese was 0.09∶1,the specific capacitance of electrode material reached the maximum,and the charge discharge process had good consistency.
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基金资助
国家自然科学基金(21204072);陕西省重点科技创新团队计划(2014KCT-04)
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