Mn<sub>3</sub>O<sub>4</sub>-石墨烯气凝胶的高效制备及其储锂性能

高峰; 覃仕辉; 臧云浩; 顾建峰; 曲江英

doi:10.1016/S1872-5805(20)60479-6

Mn₃O₄-石墨烯气凝胶的高效制备及其储锂性能

doi: 10.1016/S1872-5805(20)60479-6

1.
东莞理工学院生态环境与建筑工程学院, 广东东莞 523808;
2.
深圳大学材料学院, 广东深圳 518071

基金项目: 国家自然科学基金（U1610114）；东莞理工学院博士启动项目（GB200902-31，C300501-072）.

详细信息

作者简介:
高峰,副教授.E-mail:fenggao2003@163.com

通讯作者:
曲江英,副教授.E-mail:qujianggaofeng@163.com

中图分类号: TB33
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- 被引次数: 0
出版历程
- 收稿日期: 2020-01-03
- 录用日期: 2020-04-28
- 修回日期: 2020-03-26
- 刊出日期: 2020-04-28

Highly efficient formation of Mn₃O₄-graphene oxide hybrid aerogels for use as the cathode material of high performance lithium ion batteries

1.
School of Environment and Civil Engineering, Dongguan University of Technology, Dongguan 523808, China;
2.
College of materials science and engineering, Shenzhen University, Shenzhen 518071, China

Funds: National Natural Science Foundation of China (U1610114); Scientific Research Foundation for Leading Scholars in Dongguan University of Technology (GB200902-31, GC300501-072).

摘要

摘要: 以改进的Hummers法制备的Mn²⁺/氧化石墨烯悬浊液为原料，无需添加锰源，采用水热法得到Mn₃O₄含量可调的Mn₃O₄-石墨烯气凝胶（Mn₃O₄-GA）。得益于石墨烯气凝胶相互连通的三维导电网络以及Mn₃O₄纳米粒子和其间的强烈的耦合作用，Mn₃O₄-GA表现出了比Mn₃O₄-石墨烯粉末复合物（Mn₃O₄-G）更加优异的储锂性能，其中Mn₃O₄-GA-70（Mn₃O₄含量为70%）在100 mA·g^-1的电流密度下其可逆比容量达到1 073 mA·h·g^-1，在800 mA·g^-1的电流密度下循环200次后其比容量为565 mA·h·g^-1，保持率为85%。该方法为环境友好制备锰基石墨烯气凝胶提供新思路。
- 锂离子电池 /
- 绿色制备 /
- 石墨烯气凝胶 /
- 四氧化三锰/石墨烯气凝胶
Abstract: We report a combined hydrothermal treatment and freeze-drying method to fabricate Mn₃O₄-graphene oxide (GO) hybrid aerogels for use as the cathode material of lithium ion batteries. Results indicate that the Mn₃O₄-GO hybrids show much better lithium storage capacity and rate capability than Mn₃O₄/reduced GO powder obtained by calcination of the hydrothermally treated sample dried at 300 ℃ for 30 min under an argon atmosphere. The stronger interaction between GO and Mn₃O₄ compared with that between reduced GO and Mn₃O₄ is beneficial for the improvement of utilization rate of Mn₃O₄ and therefore the capacity. Also the higher porosity of the Mn₃O₄-GO hybrids than that of the Mn₃O₄/reduced GO allows faster ion diffusion and therefore a higher rate capability. A typical Mn₃O₄-GO hybrid with a Mn₃O₄ content of 70 wt.% exhibits the highest specific capacity of 1 073 mA h g^-1 at 100 mA g^-1 and excellent cycling stability with a capacity retention rate of 85% of after 200 cycles at 800 mA g^-1. The method is promising for the large-scale, environmentally friendly production of MnO_x-GO hybrids for lithium ion batteries.
- Lithium ion batteries /
- Green synthesis /
- Graphene aerogel /
- Mn₃O₄-graphene aerogel

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