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High-quality mesoporous graphene particles as high-energy and fast-charging anodes for lithium-ion batteries.

  • Author(s): Mo, Runwei
  • Li, Fan
  • Tan, Xinyi
  • Xu, Pengcheng
  • Tao, Ran
  • Shen, Gurong
  • Lu, Xing
  • Liu, Fang
  • Shen, Li
  • Xu, Bin
  • Xiao, Qiangfeng
  • Wang, Xiang
  • Wang, Chongmin
  • Li, Jinlai
  • Wang, Ge
  • Lu, Yunfeng
  • et al.
Abstract

The application of graphene for electrochemical energy storage has received tremendous attention; however, challenges remain in synthesis and other aspects. Here we report the synthesis of high-quality, nitrogen-doped, mesoporous graphene particles through chemical vapor deposition with magnesium-oxide particles as the catalyst and template. Such particles possess excellent structural and electrochemical stability, electronic and ionic conductivity, enabling their use as high-performance anodes with high reversible capacity, outstanding rate performance (e.g., 1,138 mA h g-1 at 0.2 C or 440 mA h g-1 at 60 C with a mass loading of 1 mg cm-2), and excellent cycling stability (e.g., >99% capacity retention for 500 cycles at 2 C with a mass loading of 1 mg cm-2). Interestingly, thick electrodes could be fabricated with high areal capacity and current density (e.g., 6.1 mA h cm-2 at 0.9 mA cm-2), providing an intriguing class of materials for lithium-ion batteries with high energy and power performance.

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