Waste eggshell as bio-template to synthesize high capacity δ-MnO2 nanoplatelets anode for lithium ion battery

Wenyang Zhang, Boya Zhang, Huixin Jin, Pan Li, Youjian Zhang, Shiyu Ma, Jianxin Zhang*

*この研究の対応する著者

研究成果: Article査読

27 被引用数 (Scopus)

抄録

In this work, abandoned chicken eggshell was used as hard biological template to synthesize battery material for the first time. We developed a simple hydrothermal method to form flocculent batt-like δ-MnO2 nanoplatelets balls inside the pores of eggshell. Herein, eggshell was ground and screened into different mesh to prepare MnO2 using the same method for comparison. MnO2 made by similar eggshell-free method served as a contrast. The MnO2 prepared from eggshell between 200 and 400 mesh has a large specific surface area up to 320.9 m2/g and a nanoplatelets ball structure capable of storing large amount of lithium ions. Most importantly, it shows the best electrochemical performances. At a current density of 100 mA/g, it delivered a high initial specific discharge/charge capacity of 2156.6/1008.2 mA h/g. After a short descent, its capacity gradually increased after about 30th cycle, and reached 1024.8/1022.1 mA h/g at the 100th cycle, much higher than that of MnO2 from eggshell-free method and reported by others. Our original preparation method of using eggshell as hard biological template has referential significance of reducing particle size and advancing electrochemical performances for other battery materials.

本文言語English
ページ(範囲)20441-20448
ページ数8
ジャーナルCeramics International
44
16
DOI
出版ステータスPublished - 2018 11月
外部発表はい

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • セラミックおよび複合材料
  • プロセス化学およびプロセス工学
  • 表面、皮膜および薄膜
  • 材料化学

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