过渡金属掺杂MnO_2用于超级电容器电极材料
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- 英文论文题名：Transition metals doped MnO_2 as an electrode material for supercapcitor
- 论文作者：阮运军 ; 吉晓 ; 王春栋 ; 江建军
- 英文论文作者：Yunjun Ruan ; Xiao Ji ; Chundong Wang ; Jianjun Jiang ; School of Optical and Electronic Information ; Huazhong University of Science and Technology
- 年：2016
- 作者机构：华中科技大学光学与电子信息学院;
- 论文关键词：金属掺杂 ; 二氧化锰 ; 赝电容 ; 超级电容器
- 会议召开时间：2016-07-01
- 会议录名称：中国化学会第30届学术年会摘要集-第三十分会：化学电源
- 语种：中文
- 分类号：TQ137.12;TM53
- 学会代码：ZGHY
- 会议名称：中国化学会第30届学术年会-第三十分会 ; 化学电源
- 会议地点：中国辽宁大连
- 主办单位：中国化学会
- 学会名称：中国化学会
- 页数：1
- 文件大小：228k
- 原文格式：D
- 会议级别：全国
摘要
超级电容器是一种介于电池和电容器之间的储能元件~([1])。二氧化锰作为一种赝电容材料,但因其具有一定的带隙,导电性较差,限制其电化学性能。Hu等~([2])在水热反应中加入Al~(3+),不仅使形貌变化,同时也产生一些氧空位,使其导电性得以提升,电化学性能得到提高。我们采用水热法制备二氧化锰,在反应过程中加入不同种类的金属离子,研究其形貌变化及电化学特性。由Fig.1可以看出单独的二氧化锰与加入Ni~(2+)的产物形貌均为纳米线团簇,而加入Fe~(3+)的产物变成了颗粒状。并且加入Fe~(3+)后,产物的比电容较单独的二氧化锰有较大提升。而加入Ni~(2+)的产物比电容较二氧化锰反而下降。
Supercapacitor is a new energy storage component which has high power density,long cycling lifespan and excellent stability.The electrochemical performance pf electrode materials is a key factor to supercapacitor.Many metal oxides suffer from poor electronic conductivity that hinder their application.We doped MnO_2 with transition metals(Fe,Ni) during hydrothermal process,and also investigated the changes of morphology and electrochemical performance of the products.As shown in Fig.1,the pure MnO_2 is a cluster of nanowires and the addition of Ni~(2+)have barely influence on the morphology of MnO_2.However,the addition of Fe~(3+) changed the morphology of MnO_2 into particles.And the value of specific capacitance of the Fe-doped MnO_2 is higher than that of pure and Ni-doped MnO_2.Therefore,the electrochemical performance of MnO_2 has great enhancement by doping some kind of transition metals.
Supercapacitor is a new energy storage component which has high power density,long cycling lifespan and excellent stability.The electrochemical performance pf electrode materials is a key factor to supercapacitor.Many metal oxides suffer from poor electronic conductivity that hinder their application.We doped MnO_2 with transition metals(Fe,Ni) during hydrothermal process,and also investigated the changes of morphology and electrochemical performance of the products.As shown in Fig.1,the pure MnO_2 is a cluster of nanowires and the addition of Ni~(2+)have barely influence on the morphology of MnO_2.However,the addition of Fe~(3+) changed the morphology of MnO_2 into particles.And the value of specific capacitance of the Fe-doped MnO_2 is higher than that of pure and Ni-doped MnO_2.Therefore,the electrochemical performance of MnO_2 has great enhancement by doping some kind of transition metals.
引文
[1]Ruan,Y.;Jiang,J.;Wan,H.;Ji,X.;Miao,L.;Peng,L.;Zhang,B.;Lv,L.;Liu,J.Journal of Power Sources,2016,301,122.
[2]Hu,Z.;Xiao,X.;Chen,C.;Li,T.;Huang,L.;Zhang,C.;Su,J.;Miao,L.;Jiang,J.;Zhang,Y.;Zhou,J.Nano Energy,2015,11,226.
[2]Hu,Z.;Xiao,X.;Chen,C.;Li,T.;Huang,L.;Zhang,C.;Su,J.;Miao,L.;Jiang,J.;Zhang,Y.;Zhou,J.Nano Energy,2015,11,226.