锂盐种类对Li/FeS_2一次电池性能的影响

Effect of different lithium salts on performance of Li/FeS_2 battery

考察了Li I、Li PF6、Li Cl O4、Li TFSI不同锂盐对锂/二硫化亚铁(Li/Fe S2)一次电池内阻、开路电压及放电性能的影响。按Li I、Li PF6、Li Cl O4、Li TFSI的顺序,Li/Fe S2电池平均内阻分别为122、108、152、136 mΩ,平均开路电压为1.91、1.92、1.87、1.93 V。在-30℃下锂盐采用Li TFSI的Li/Fe S2电池性能最好,1 000 m A恒流放电Li TFSI电池放电中值电压比最低的Li Cl O4约高0.09 V,1 000 m A放电容量比Li Cl O4约高243 m Ah。随着温度的升高,不同锂盐电池的放电性能均明显提升,Li I、Li PF6性能提升幅度最大。当低于50℃时Li PF6放电性能优于Li I,Li PF6可作为Li/Fe S2电池用锂盐Li I的替代品。

The effects of Li I,Li PF6,Li Cl O4 and lithium bis（trifluoromethylsulfonyl）imide（Li TFSI） on internal resistance,open circuit voltage and discharge performance of Li/Fe S2 primary batteries were investigated.In accordance with the sequence of Li I,Li PF6,Li Cl O4 and Li TFSI,the average internal resistances of the battery are 122,108,152 and 136mΩ; open circuit voltages are 1.91,1.92,1.87 and 1.93 V.Under-30 ℃,the batteries prepared by Li TFSI possess the best performance.At 1 000 m A,the mean discharge voltage of Li/Fe S2 battery used Li TFSI is more than 0.09 V higher than which one used Li Cl O4; capacity is more than 243 m Ah than which one used Li Cl O4.The discharge performances of different batteries improve as the temperature is improved,and the batteries prepared by Li I and Li PF6 have the biggest hoist scope.Below 50 ℃,the discharge property of Li PF6 is superior to Li I.Li PF6 can be used as a substitute for Li I in Li/Fe S2 battery..