Tian Qianqiu, Hu Jing, Zhang Shiyu, Han Xiaopeng, Guo Hao, Tang Licheng, Wang Jiajun, Hu Wenbin
School of Materials Science and Engineering, Tianjin University, Tianjin 300072, China.
Shandong Engineering Research Center of Green and High-Value Marine Fine Chemical, Weifang University of Science and Technology, Shouguang 262700, China.
Nanomaterials (Basel). 2022 Apr 15;12(8):1360. doi: 10.3390/nano12081360.
Long-time thermal batteries with high specific energy are crucial for improving the fast response ability of long-range weapons. Due to its high capacity, safety, and stability, the new sulfide cathode has attracted extensive attention. In this study, an FeS@CoS composite cathode with a core-shell structure was prepared via a combination of hydrothermal and high-temperature vulcanization processes. The novel FeS@CoS cathode not only delivers a high discharge voltage and output capacity, but also has high thermal stability and excellent conductivity. Benefiting from the synergistic effect of FeS and CoS, the as-synthesized cathode yields a high specific capacity. At a large current density of 1 A/cm, the utilization rate of FeS@CoS cathode material can reach 72.33%, which is 8.23% higher than that of FeS. Moreover, the maximum output capacity is up to 902 As/g, with a utilization rate of 79.02% at 500 mA/cm. This novel design strategy holds great promise for the development and application of high-performance thermal batteries in the future.
具有高比能量的长效热电池对于提高远程武器的快速响应能力至关重要。新型硫化物阴极因其高容量、安全性和稳定性而备受关注。本研究通过水热法和高温硫化法相结合制备了具有核壳结构的FeS@CoS复合阴极。这种新型FeS@CoS阴极不仅具有高放电电压和输出容量，还具有高热稳定性和优异的导电性。受益于FeS和CoS的协同效应，合成的阴极具有高比容量。在1 A/cm的大电流密度下，FeS@CoS阴极材料的利用率可达72.33%，比FeS高8.23%。此外，最大输出容量高达902 As/g，在500 mA/cm时利用率为79.02%。这种新颖的设计策略对未来高性能热电池的开发和应用具有广阔前景。
