Highly monodisperse dumbbell-like yolk-shell manganese monoxide/carbon microspheres for lithium storage and their lithiation evolution

Junjie Chen, Ke Yang, Huyan Yu, Tariq Shah, Qiuyu Zhang, Baoliang Zhang

Research output: Contribution to journalArticlepeer-review

27 Scopus citations

Abstract

Herein, a novel dumbbell-like MnO/C microspheres with the yolk-shell structure, high monodispersity and regular morphology are successfully prepared by calcining precursors MnCO3/RF microspheres under the vacuum condition. The effects of calcination temperature on morphology, carbonization degrees of carbon shells and pore properties of MnO/C microspheres are systematically investigated. Benefited from the yolk-shell structure, reasonable distribution of MnO nanocrystals and porous structure, MnO/C microspheres prepared at 550 °C exhibit high reversible capacity of 852.6 mAh/g at 1.32C over 500 cycles, long-term cycling stability (888.4 mAh/g at 2.64C over 400 cycles) and excellent rate performance (454.39 mAh/g at 6.60C and 253.28 mAh/g at 13.20C are remained). Furthermore, the lithiation evolution of MnO/C microspheres in the long-term cycling process at nano- and micro-scales are revealed and the LiCoO2||MnO/C full cell present a great cyclic stability. Dumbbell-like MnO/C microspheres demonstrate potential applications for next-generation Li-ion batteries as anode materials profited from superior electrochemical performance.

Original languageEnglish
Pages (from-to)37-48
Number of pages12
JournalCarbon
Volume170
DOIs
StatePublished - Dec 2020

Keywords

  • Dumbbell-like
  • Lithiation evolution
  • MnO/C microspheres
  • Monodispersity
  • Yolk-shell structure

Fingerprint

Dive into the research topics of 'Highly monodisperse dumbbell-like yolk-shell manganese monoxide/carbon microspheres for lithium storage and their lithiation evolution'. Together they form a unique fingerprint.

Cite this