将水热合成的 CoS2与一定量葡萄糖混合后经高温煅烧得到碳化 CoS2粉,利用 X 射线衍射仪、扫描电镜和激光粒度分布仪对碳化前后 CoS2的显微结构进行了研究;采用丝网印刷技术将 CoS2粉制成薄膜电极,组装成 LiSi/CoS2体系单体热电池并测试了其放电性能.结果表明:碳化 CoS2颗粒表面形成包覆碳层,阻隔了 CoS2合成过程中生成的杂质对热电池性能的影响;与未碳化 CoS2的相比,碳化 CoS2使得 LiSi/CoS2体系热电池放电初期存在的电压尖峰降低了81.3%,有效比容量提高了26%.
The carbonized cobalt disulfide (CoS2 )powders were prepared by high-temperature roasting of the mixture of hydrothermal synthesized CoS2 and a certain amount of glucose.The microscopic structures properties of CoS2 before and after carbonization were studied by X-ray diffraction,scanning electron microscopy and laser particle size distribution instrument.The thin-film anode of CoS2 was prepared by the screen printing technology, and then the anode was assembled into LiSi/CoS2 single cells for the discharge performance test.The results show that a carbon layer was formed on the surface of the carbonized CoS2 particles,which cut off the effects of impurities formed in the CoS2 synthesis process on the performance of thermal batteries.Comparing to those of the un-carbonized CoS2 ,the initial discharge voltage spike of LiSi/CoS2 system thermal battery with carbonized CoS2 was reduced by 81.3%,and the effective specific capacity increased by 26%.
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