Spherical mesophase soft carbon materials with micro-nano composite structure and their applications in lithium-ion batteries

Fuchuang Huang, Qinghai Zhao, James Yang, Hongxin Zhang, Wei Huo, Fangchao Xu

Research output: Contribution to journalReview articlepeer-review

2 Scopus citations

Abstract

This paper is to investigate the mesophase sphere soft carbon material with micro-nano composite structure and its application in the energy-storage Li-ion battery and electrochemical performance of the battery through experimental tests. The results show that the ball diameter is below 10 μm. For button half-cell, the first coulombic efficiency at 0.1C rate is about 87.1%, the ratio that charging capacity of 2C divided by the charging capacity of 1C is 84.8%, and the charging capacity retention rate after 50 cycles at 0.5C rate is 99.9%. For a full battery of 50 Ah, the discharge capacity can still maintain at 80% or more at the 2C or 3C discharging rate, its discharge rate can still reach more than 80% at a temperature of −20℃, and the capacity retention is 97.7% after 500 cycles.

Original languageEnglish
Pages (from-to)1675-1680
Number of pages6
JournalEnergy Sources, Part A: Recovery, Utilization and Environmental Effects
Volume40
Issue number14
DOIs
StatePublished - Jul 18 2018

Keywords

  • Electrochemical performance
  • Li-ion battery
  • mesophase sphere soft carbon material
  • micro-nano composite structure
  • properties of materials

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