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电化学(中英文) ›› 2011, Vol. 17 ›› Issue (2): 217-221.  doi: 10.61558/2993-074X.2834

• 研究论文 • 上一篇    下一篇

介孔碳基钴镍氧化物的电化学电容性能

杨贞胜1, 孔令斌1,2*, 邓 莉1, 罗永春2, 康 龙2   

  1. 1. 兰州理工大学甘肃省有色金属新材料省部共建国家重点实验室,甘肃 兰州730050;
    2. 兰州理工大学材料科学与工程学院,甘肃 兰州 730050
  • 收稿日期:2011-01-07 修回日期:2011-03-15 出版日期:2011-05-28 发布日期:2011-05-05
  • 通讯作者: 孔令斌 E-mail:konglb@lut.cn
  • 基金资助:

    国家自然科学基金(50602020), 973计划前期研究专项(2007CB216408)和甘肃省高校基本科研业务费专项资金

Electrochemical Capacitive Performance of Mesoporous Carbon Based Co-Ni Oxides

YANG Zhen-Sheng1, KONG Ling-Bin1,2*, DENG Li1, LUO Yong-Chun2, KANG Long2   

  1. 1. State Key Laboratory of Gansu Advanced Non-ferrous Metal Materials, Lanzhou University of Technology, Lanzhou 730050, China;
    2. School of Materials Science and Engineering, Lanzhou University of Technology, Lanzhou 730050, China
  • Received:2011-01-07 Revised:2011-03-15 Published:2011-05-28 Online:2011-05-05
  • Contact: KONG Ling-Bin E-mail:konglb@lut.cn

摘要: 以介孔碳CMK-3为载体,利用CMK-3表面缺陷作形核中心,应用前驱体化学液相共沉淀法制备新型的Co0.25Ni0.75氧化物/CMK-3复合材料.X射线衍射(XRD)分析及扫描电子显微镜(SEM)形貌观察表明该材料主要呈现弱结晶态结构, 其中Co-Ni氧化物纳米片交错成空间网络并包覆在介孔碳表面.BET测试表明该材料孔径分布在3~4 nm之间,且高分散、疏松多孔,具有良好的OH-离子传递特性.循环伏安和恒流充放电测试表明,该材料有高的电化学活性, 在5 mA/cm2电流密度下,Co0.25Ni0.75氧化物(92%)/C比电容达1781F/g.

关键词: 超级电容器, 钴镍氧化物, 交错纳米片网络

Abstract: By using defects on the surface of CMK-3 served as nucleation center, Co0.25Ni0.75 oxide/C composite was successfully prepared through a simple chemical co-precipitation method. Characterization was carried by using X-ray diffraction, BET and scanning electron microscopy. Results showed that a perfect mesoporous network of interconnected nanoflakes was obtained for Co0.25Ni0.75 oxide/C composite and, this material has a less crystallization, interconnected nanoflakes network structure and a narrow mesoporous distribution at about 3~4 nm. The highly dispersed and loosely packed Co0.25Ni0.75 oxide/C composite possessed good electrochemical accessibility and fast diffusion rate of OH-. Cyclic voltammetry, charge–discharge curves suggested that the as-prepared Co0.25Ni0.75 oxide(92%) /C electrode is highly electrochemical activated and an admirable specific capacitance of as high as 1781 F/g could be obtained at current density of 5mA/cm2.

Key words: supercapacitor; , cobalt-nickel oxide; , interconnected nanoflakes network

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