碱性锌锰电池的电解液由普通锌锰电池的酸性变为导电性能更好的碱性(\ceKOH\ceKOH),负极也由锌片改为锌粉,反应面积增加,使放电电流大幅度提高,正极是\ceMnO2\ceMnO2。碱性锌锰电池的容量和放电时间比普通锌锰电池增加几倍。
负极:\ceZn+\ceZn+\ce2OH−−\ce2OH−−\ce2e−\ce2e−\xlongequal[]\xlongequal[]\ceZn(OH)2\ceZn(OH)2
正极:\ce2MnO2+\ce2MnO2+\ce2H2O+\ce2H2O+\ce2e−\ce2e−\xlongequal[]\xlongequal[]\ce2MnO(OH)+\ce2MnO(OH)+\ce2OH−\ce2OH−
总反应:\ceZn+\ceZn+\ce2MnO2+\ce2MnO2+\ce2H2O\ce2H2O\xlongequal[]\xlongequal[]\ce2MnO(OH)\ce2MnO(OH)+\ceZn(OH)2\ceZn(OH)2