化工学报 ›› 2017, Vol. 68 ›› Issue (3): 1116-1121.DOI: 10.11949/j.issn.0438-1157.20161630

• 表面与界面工程 • 上一篇    下一篇

Na0.44MnO2纳米棒/石墨烯正极的制备和电化学储锂性能

刘才1,2, 王丽媛1, 李建刚1, 冀德坤1, 焦玉海1, 张荣月1, 徐文星3   

  1. 1 北京石油化工学院化学工程学院, 北京 102617;
    2 恩泽生物质精细化学品北京市重点实验室, 北京 102617;
    3 北京石油化工学院信息工程学院, 北京 102617
  • 收稿日期:2016-11-16 修回日期:2016-11-18 出版日期:2017-03-05 发布日期:2017-03-05
  • 通讯作者: 徐文星,xuwenxing@bipt.edu.cn
  • 基金资助:

    国家自然科学基金项目(61304217);北京市教育委员会科技计划项目(KM201510017001,KM201510017003)。

Preparation and electrochemical lithium storage properties of Na0.44MnO2 nanorods/graphene cathode

LIU Cai1,2, WANG Liyuan1, LI Jiangang1, JI Dekun1, JIAO Yuhai1, ZHANG Rongyue1, XU Wenxing3   

  1. 1 College of Chemical Engineering, Beijing Institute of Petrochemical Technology, Beijing 102617, China;
    2 Beijing Key Laboratory of Enze Biomass Fine Chemicals, Beijing 102617, China;
    3 College of Information Engineering, Beijing Institute of Petrochemical Technology, Beijing 102617, China
  • Received:2016-11-16 Revised:2016-11-18 Online:2017-03-05 Published:2017-03-05
  • Contact: 10.11949/j.issn.0438-1157.20161630
  • Supported by:

    supported by the National Natural Science Foundation of China (61304217),the Scientific Research Common Program of Beijing Municipal Commission of Education (KM201510017001,KM201510017003).

摘要:

以KMnO4、MnSO4和NaOH为初始原料,利用水热软化学法制备Na0.44MnO2。XRD证实该材料具有S形孔道结构,TEM表征表明这是一种单晶纳米棒,可能有利于制备高性能正极材料。同时利用Hummers法制备石墨烯作为导电剂,通过搅拌法混合电极材料制备正极涂片。电化学测试研究显示随着的石墨烯添加量的增大,电池容量和倍率性能均得到提高。当石墨烯含量达到45%时,在0.1 A·g-1电流密度下电池容量达到192.5 mAh·g-1,在2.0 A·g-1倍率电流密度下,其容量依然保持在123.4 mAh·g-1,说明该电极材料有潜力应用于下一代高性能电池当中。

关键词: 水热, 制备, 纳米材料, 石墨烯, 锂离子电池

Abstract:

Na0.44MnO2 nanorods were prepared from KMnO4, MnSO4 and NaOH as initial raw materials by hydrothermal soft chemical method. XRD confirmed that the products have S-shaped channel structure, and TEM characterization indicates that Na0.44MnO2 nanorods is single-crystal structure, which can be suited for preparation of high performance cathode material. Graphene prepared by hummer method were used as conductive agent. Electrochemical test research shows that the capacity, cycle and rate performance of Na0.44MnO2 nanorods/graphene are improved with the increase of the amount of graphene. When the content of graphene reached to 45%, the capacity of electrode is up to 192.5 mAh·g-1 at the current density of 0.1 A·g-1. In the rate test, the capacity of electrode is still located at 123.4 mAh·g-1 at the current density of 2.0 A·g-1, and it indicates that these electrode materials have potential application in the next generation of advanced batteries.

Key words: hydrothermal, preparation, nanomaterials, graphene, lithium ion batteries

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