C@MnO_2复合材料的制备及电化学性能研究
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- 英文论文题名：The synthesis of C@MnO_2 composite and its capacitance performance
- 论文作者：王建芳 ; 寇领江 ; 任有良 ; 刘倩 ; 孙强强
- 英文论文作者：Jianfang Wang ; Lingjiang Kou ; Youliang Ren ; Qian Liu ; Qiangqiang Sun ; College of Chemical Engineering and Modern Materials of Shangluo University ; Shaanxi Key Laboratory of Comprehensive Utilization of Tailings Resource
- 年：2016
- 作者机构：商洛学院化学工程与现代材料学院(陕西省尾矿资源综合利用重点实验室);
- 论文关键词：介孔碳 ; 氧化锰 ; 核壳材料 ; 电容性能
- 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-第三十九分会：纳米碳材料
- 语种：中文
- 分类号：TB332
- 学会代码：ZGHY
- 会议名称：中国化学会第30届学术年会-第三十九分会 ; 纳米碳材料
- 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：324k
- 原文格式：D
- 会议级别：全国
摘要
在过渡金属氧化物中,氧化锰具有较高的理论比电容(1370 F g~(-1))、环境友好及低毒性等优点。然而,该材料电子传导特性较差且循环寿命低,在充放电过程中出现许多力学性能及活性材料溶解等问题~([2])。氧化锰和碳材料的结合克服了上述缺点从而形成一类新的复合材料。本研究采用两步法,以八苯基倍半硅氧烷为前驱体制得介孔碳硅球phx-C-Si,除硅后得到phx-C介孔碳球~([3])。所得碳球在0.5 mol L~(-1)KMnO_4溶液中发生反应,最终得到C@MnO_2。产物颗粒基本呈球形,具有良好的分散性,呈现有序的介孔结构。采用三电极体系在1 mol L~(-1)硫酸钠电解液中对电极材料C@MnO_2进行循环伏安测试,该材料表现出较高的比电容值(286 F g~(-1))。
Among the various transition-metal oxides, MnO_2 has attracted more attentions for its high theoretical specific capacitance(1370 F g~(-1)), environmental compatibility, and low cost. However, it suffers from the poor conductivity and short cycle life, caused by mechanical issues and active material dissolution during a charge/discharge process ~([2]). To a certain extent, a MnO_2/C composite integrating MnO_2 nanostructures with a carbonaceous backbone can overcome these drawbacks~([3]). Via two step method, firstly mesoporous carbon spheres are prepared by using eight phenyl silsesquioxane as precursor, then mesoporous carbon are reacted 0.5 mol L~(-1) KMnO_4 to form C@MnO_2 finally. The electrochemical property of as–prepared C@MnO_2 has been investigated by cyclic voltammetry in 1 mol L~(-1) Na_2SO_4 solution in a voltage of-0.2-0.8 V, which exhibits high specific capacitance of 286 F g~(-1).
Among the various transition-metal oxides, MnO_2 has attracted more attentions for its high theoretical specific capacitance(1370 F g~(-1)), environmental compatibility, and low cost. However, it suffers from the poor conductivity and short cycle life, caused by mechanical issues and active material dissolution during a charge/discharge process ~([2]). To a certain extent, a MnO_2/C composite integrating MnO_2 nanostructures with a carbonaceous backbone can overcome these drawbacks~([3]). Via two step method, firstly mesoporous carbon spheres are prepared by using eight phenyl silsesquioxane as precursor, then mesoporous carbon are reacted 0.5 mol L~(-1) KMnO_4 to form C@MnO_2 finally. The electrochemical property of as–prepared C@MnO_2 has been investigated by cyclic voltammetry in 1 mol L~(-1) Na_2SO_4 solution in a voltage of-0.2-0.8 V, which exhibits high specific capacitance of 286 F g~(-1).
引文
[1]Chen,S.;Zhu,J.;Wu,X.;Han;Q.;Wang,X.ACS Nano,2010,4:2822.
[2]Kim,I-T.;Kouda,N.;Yoshimoto,N.;Morita,M.J.Power Sources,2015,298:123.
[2]Kim,I-T.;Kouda,N.;Yoshimoto,N.;Morita,M.J.Power Sources,2015,298:123.