学术
摘 要:
应用低温固相法和化学沉淀法制备4种用于电化学电容器的纳米级二氧化锰.由XRD、SEM和循环伏安等表征和测试其物化性能及电容特性.结果表明,该二氧化锰材料的颗粒尺寸约几十nm,在0.1 A·g^-1电流密度下放电时产物的比电容最高,可达149F·g^-1,二氧化锰的大倍率放电性能与其结构特征直接相关,材料的晶体结构越完整其大倍率放电性能越好.[著者文摘]
文章出处:
《电化学》-2007年13卷3期 -233-237页
栏目信息:
文献标识码:
A
文章编号:
1006-3471（2007）03-0233-05
The Syntheses and Electrochemical Performance of Nano-MnO2 for Supercapacitor
MA Jun , ZHENG Ming-sen, DONG Quan-feng （Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, Fujian, China）
Abstract:
Nano-manganese dioxide were prepared by two different methods which are low temperature solid reaction and chemical deposition . The products were characterized by XRD, SEM, BET and constant current charge-discharge tests. The result shows that there is a close relationship between specific capacitance and BET surface areas. Meanwhile the specific capacitance was impacted little by the structure of the nano-manganese dioxides. However, the product performance of high rates, was influenced by structure, the higher rate can be obtained with the more perfect crystal structure.[著者文摘]
Key words:
supercapacitor; nano-manganese dioxide; crystal structure
基金资助:
973项目（2002CB211800）,福建省化学电源科技创新平台（2006H0090）资助
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