Chinese Journal of Applied Chemistry ›› 2018, Vol. 35 ›› Issue (12): 1507-1513.DOI: 10.11944/j.issn.1000-0518.2018.12.180020

• Full Papers • Previous Articles     Next Articles

Effect of Activated Carbon from Rice Husk on the Rate Performance of Lithium Manganese Oxide Battery

SONG Xuelia,ZHANG Jianhuia*(),LU Haiyanb,BAO Jinpengb,TIAN Yongxiaa,LIN Haibob   

  1. aZhuhai College of Jilin University,Zhuhai,Guangdong 519041,China
    bCollege of Chemistry,Jilin University,Changchun 130012,China
  • Received:2018-01-22 Accepted:2018-05-14 Published:2018-12-05 Online:2018-12-10
  • Contact: ZHANG Jianhui
  • Supported by:
    Supported by the National Natural Science Foundation of China(No.21573093)

Abstract:

Rice husk activated carbon(RH-AC) was synthesized via facile carbonization and activation basing on previous work. Lithium Manganese Oxide(LMO) and RH-AC were used to prepare composite electrode. Lithium metal was used as the counter electrode. Composite electrode and pure LMO electrode were tested via the galvanostatic charge/discharge(GCD). The results show that the specific capacity of 89.3 mA·h/g at 5 C rate, and the capacity retention of 89% after 100 cycles are obtained for the composite electrode with addition 5% mass fraction of RH-AC(RH-AC5). Obviously, the composite electrode exhibits higher specific capacity with better rate capability and cycle stability than those of LMO electrode. This result was further verified by the impedance simulation result and the lithium ion diffusion coefficients obtained by the cyclic voltammetric method for LMO electrode and RH-AC5 electrode.

Key words: lithium manganese oxide, activated carbon, rate capability, diffusion coefficients