正极材料对热电池空载性能的影响  

Effect of cathode materials on no-load performance of thermal batteries

作　　者：杨晓勇[1] 郑世刚 李清馨 邢永慧[1] 汪东东 YANG Xiaoyong;ZHENG Shigang;LI Qingxin;XING Yonghui;WANG Dongdong(Tianjin Institute of Power Sources,Tianjin 300384,China;The military representative of the Rocket Force,Beijing 100074,China)

机构地区：[1]中国电子科技集团公司第十八研究所,天津300384 [2]火箭军某军事代表室,北京100074

出　　处：《电源技术》2024年第12期2490-2493,共4页Chinese Journal of Power Sources

摘　　要：空载安全性是热电池设计过程中首先要考虑的问题。以LiB/LiCl-LiBr-KBr/MS_(2)(M=Fe,Co,Ni)热电池体系作为研究对象,探究了FeS_(2)、CoS_(2)、NiS_(2)正极材料对热电池空载安全性能的影响。通过分析材料形貌、热稳定性,证实了FeS_(2)的热稳定性和结构稳定性最差,CoS_(2)和NiS_(2)较好;通过对比不同硫化物正极材料与电解质之间的相容性,证实了FeS_(2)与熔盐电解质之间的化学稳定性较差,而CoS_(2)和NiS_(2)的化学稳定性相当。同时结合热电池空载曲线,证明了CoS_(2)空载安全性最好,而FeS_(2)正极材料的空载曲线下降最快。No-load safety is the first consideration in the design of thermal battery.The LiB/LiCl-LiBr-KBr/MS_(2)(M=Fe,Co,Ni)thermal battery system was taken as the research object,and the effects of FeS_(2),CoS_(2) and NiS_(2) cathode materials on the no-load safety performance of thermal batteries were explored.Through the analysis of material morphology and thermal stability,it is confirmed that the thermal stability and structural stability of FeS_(2) are the worst,while those of CoS_(2) and NiS_(2) are better.By comparing the compatibility between different sulfide cathode materials and electrolytes,it is concluded that the chemical stability between FeS_(2) and molten salt electrolytes is poor,while the chemical stability of CoS_(2) and NiS_(2) is comparable.At the same time,combined with the no-load curve of the thermal battery,it is proved that the no-load safety of CoS_(2) is the best,while the no-load curve of FeS_(2) cathode material decreases the fastest.

关 键 词：热电池 空载性能 硫化物 熔盐电解质 

分 类 号：TM911[电气工程—电力电子与电力传动]