Acta Phys. -Chim. Sin. ›› 1998, Vol. 14 ›› Issue (05): 477-480.doi: 10.3866/PKU.WHXB19980519

• Note • Previous Articles    

A Simple Method to Evaluate Lithium Insertion Capacity of PPP-based Carbon

Zhou Heng-Hui, Chen Ji-Tao, Ci Yun-Xiang, Liu Chang-Yan   

  1. College of Chemistry Molecular Engineering,Peking University,Beijing 100871
  • Received:1997-09-26 Revised:1997-11-15 Published:1998-05-15
  • Contact: Ci Yun-Xiang

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Abstract:

 The method to evaluate the reversible lithium insertion capacity (Qre) has been studied using poly (p-phenylence) (PPP) heat-treated at 550 1000 ℃ in inert gas atomsphere by H/C atomic ratio and FTIR measures. The H/C atomic ratio and Qre decreased with increasing heat-treament temperature. The absorption ratio of 1020cm-1 band to the 1440cm-1 band (Ra) is directly related to the Qre of carbon samples. The samples with R. >1-1 and without 807cm-1 peak tend to have high Qre (>372 mA.h-g-1). The reversible capacity for Li+ ion insertion decrease as Ra decreases.

Key words: PPP-dericed carbon, Lithium ion cell, Reversible lithium insertion capacity, FTIR