Hierarchical lamellar-structured MnO2@graphene for high performance Li, Na and K ion batteries

Wenyang Zhang, Huixin Jin, Yiqun Du, Youjian Zhang, Zihan Wang, Jianxin Zhang*

*この研究の対応する著者

研究成果: Article査読

8 被引用数 (Scopus)

抄録

Finding suitable electrode materials for energy storage devices with large ions like Na+ and K+ is notoriously difficult. Herein, MnO2@graphene with hierarchical lamellar structure has be synthesized. The flower-like lamellar-structured MnO2 and nanosheets of graphene combine together to form the composite with vast space for large ions to transport and store, as well as huge surface area for reactions. Sandwiched between graphene nanosheets, electrical conductivity and mechanical properties of MnO2 are highly enhanced, enabling it to with-stand large current shock and long time cycling. In Li, Na and K ion batteries, MnO2@graphene all shows excellent electrochemical performance. Also, when coupled with liquid K-Na anode, MnO2@graphene displays better performance than with solid K anode, indicating its great potential at dendrite-free K ion battery. MnO2@graphene promotes the exploitation of more suitable electrode materials for alkali ion batteries, deepens understanding of their inner mechanisms, and boosts their commercialization.

本文言語English
ページ(範囲)12481-12486
ページ数6
ジャーナルChemistrySelect
5
40
DOI
出版ステータスPublished - 2020 10月 29
外部発表はい

ASJC Scopus subject areas

  • 化学 (全般)

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