Nitrogen-doped graphene in-situ modifying MnO nanoparticles for highly improved lithium storage

Hua Wen Huang, Shan Shan Fan, Wenda Dong, Wei Zou, Min Yan, Zhao Deng, Xianfeng Zheng, Jing Liu, Hong En Wang, Lihua Chen, Yu Li, Bao Lian Su

Research output: Contribution to journalArticle

Abstract

We report the nitrogen-doped graphene (NG) in-situ modifying MnO nanoparticles (MnO/NG) to improve the electrochemistry performance for lithium storage. The NG in-situ modification not only improves the electrical conductivity but also alleviates the agglomeration and accommodates the volume change of MnO nanoparticles during the cycling process. More importantly, the non-heat treatment is beneficial to maintain the original structure and crystal shape of MnO. As a results, the MnO/NG exhibits a high reversible capacity of 1005 mAh/g after 100 cycles at 100 mA/g, four times that of pure MnO nanoparticles (209 mAh/g) and almost twice that of in-situ carbonization of MnO nanoparticles (MnO/C) (490 mAh/g). Particularly, the MnO/NG demonstrates a stable cycling capacity of 549 mAh/g after 1000 cycles at 1000 mA/g without pulverization. This work confirms that nitrogen-doped graphene in-situ modification is a more efficient strategy comparing to carbon modification for transition metal oxides as anode materials for highly improved lithium storage.

Original languageEnglish
Pages (from-to)893-901
Number of pages9
JournalApplied Surface Science
Volume473
DOIs
Publication statusPublished - 15 Apr 2019

Keywords

  • In-situ carbonization
  • In-situ modification
  • Li-ion battery
  • MnO
  • Nitrogen-doped graphene

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