锂/聚苯电池放电行为的理论分析

Theoretical Study on the Discharge Curves of Lithium/Polyphenylene

锂／聚苯电池的放电特性取决于其放电电流密度（ｉｄ）。当ｉｄ很小时，高分子电极在整个厚度范围内均匀放电。当ｉｄ很高时，正极的反应被限制在一狭小区域，该区域随着电池的不断放电而向高分子电极内部穿透，并且电阻不断增加，而截止电压表明放电过程的结束。当以中等电流放电时，上述两种放电形式都存在。据此，建立了锂／导电高分子电池的放电电压与放电电流的关系式。

The discharge characteristics of a lithium/conducting polymer battery depend on its discharge current density(id). As id was sufficiently low, the reaction in the positive electrode carried out evenly throughout the film. As id was extraordinary high, the reaction in the positive electrode was confined in a narrow zone, which moves through the electrode as the battery was discharged. If the battery was discharge at a medium rate, both the reactions in the narrow zone and in the other part the positive electrode should be considered. Based on these reaction models, 3 voltagetime equations have been derived for describing the discharge processes of the battery, and they are in good agreements with the experimental results of alithium/poly(paraphenylene) battery. 