应用化学 ›› 2022, Vol. 39 ›› Issue (5): 779-786.DOI: 10.19894/j.issn.1000-0518.210141

• 研究论文 • 上一篇    下一篇

多孔纳米立方FeSe2/石墨烯复合材料的可控构建及在钠离子电池中的应用

王福洋1, 宋伟明1(), 孙立1, 冯建2, 叶军1, 杨芷奇1   

  1. 1.齐齐哈尔大学化学与化学工程学院,齐齐哈尔 161006
    2.东北大学材料科学与工程学院,沈阳 110819
  • 收稿日期:2021-03-24 接受日期:2021-07-28 出版日期:2022-05-01 发布日期:2022-05-24
  • 通讯作者: 宋伟明
  • 基金资助:
    黑龙江省省属高等学校基本科研业务费(135109102);齐齐哈尔大学研究生创新科研项目(YJSCX2019038)

Controllable Construction of Porous Nanocube FeSe2/Graphene Composite for Efficient Na⁃Ion Storage

Fu-Yang WANG1, Wei-Ming SONG1(), Li SUN1, Jian FENG2, Jun YE1, Zhi-Qi YANG1   

  1. 1.School of Chemistry and Chemical Engineering,Qiqihar University,Qiqihar 161006,China
    2.School of Materials Science and Engineering,Northeastern University,Shenyang 110819,China
  • Received:2021-03-24 Accepted:2021-07-28 Published:2022-05-01 Online:2022-05-24
  • Contact: Wei-Ming SONG
  • About author:qdsongweiming@163.com
  • Supported by:
    the Basic Scientific Research Business Expenses of Provincial Colleges and Universities in Heilongjiang Province(135109102);Qiqihar University Postgraduate Innovation Research Project(YJSCX2019038)

摘要:

设计具有较高比容量和循环稳定性的负极材料对于钠离子电池的发展至关重要。过渡金属硒化物因其具有较高的理论容量而成为潜在的负极材料。但是,硒化物电导率低下且在钠离子嵌入/脱出的过程中会发生较大程度的体积膨胀,导致比容量快速下降。因此,结构调控显得尤为重要。通过常规水热法在二维还原氧化石墨烯(rGO)上原位生长多孔纳米立方体FeSe2,制备了具有更多活性位点和结构更加稳定的FeSe2/rGO复合材料。当用作钠离子电池的负极时,复合材料FeSe2/rGO在0.2 A/g时比容量为694.6 mA?h/g,在2.0 A/g电流密度下,循环300圈后比容量为300 mA?h/g。

关键词: FeSe2/rGO, 夹层结构, 钠离子电池, 负极材料

Abstract:

The design of anode materials with higher specific capacity and cycle stability is very important for the development of sodium ion batteries. Transition metal selenide has become a potential anode electrode material because of its higher theoretical capacity. However, selenide has a low conductivity and a large volume expansion occurs during the insertion/extraction of sodium ions, resulting in a rapid decrease in specific capacity. Therefore, structural control is particularly important. The FeSe2/rGO composite material with more active sites and more stable structure was prepared by conventional hydrothermal method to grow porous nanocube FeSe2in situ on two-dimensional reduced graphene oxide(rGO). When used as an anode material for Sodium ion battery(SIBs), the FeSe2/rGO electrode has excellent rate capacity of 694.6 mA?h/g at 0.2 A/g, and high reversible capacity of 300.0 mA?h/g at 2.0 A/g after 300 cycles.

Key words: FeSe2/rGO, Sandwich structure, Sodium ion batteries, Anode material

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