熔盐法制备Co_(9)S_(8)/C锂离子电池负极材料及其性能研究  

Preparation of Co_(9)S_(8)/C Anode Materials for Lithium-Ion Batteries By Molten Salt Method and Performance Research

作　　者：王思毅 况知凡 甘振鉴 冉燕 王石泉[2] 刘红英[2] 张燕青[2] WANG Si-yi;KUANG Zhi-fan;GAN Zhen-jian;RAN Yan;WANG Shi-quan;LIU Hong-ying;ZHANG Yan-qing(School of Microelectronics,Hubei University,Wuhan Hubei 430062,China;School of Chemistry and Chemical Engineering,Hubei University,Wuhan Hubei 430062,China)

机构地区：[1]湖北大学微电子学院,湖北武汉430062 [2]湖北大学化学化工学院,湖北武汉430062

出　　处：《化肥设计》2024年第3期6-12,21,共8页Chemical Fertilizer Design

基　　金：湖北三峡实验室开放/创新基金(SK211005)资助。

摘　　要：以氯化钴为钴源,硫脲为硫源,柠檬酸为碳源,冷冻干燥后,采用熔盐法在不同的温度进行退火处理得到Co_(9)S_(8)与C的复合物CS(CS-600,CS-700,CS-800,CS-900)。系统地探讨了不同的退火温度对产物的晶体结构、形貌及电化学性能的影响。结果发现:和纯Co_(9)S_(8)样品相比,碳复合的Co_(9)S_(8)样品的循环性能与倍率性能得到了较大的提升。在煅烧温度为700℃时,所合成的样品CS-700具有最高的比容量与最好的循环性能,在100 mA·g^(-1)充放电循环100次后,放电比容量可以达到898.6 mAh·g^(-1),可作为锂离子电池负极材料的潜在选择。Taking cobalt chloride as the cobalt source,thiourea as the sulfur source,and citric acid as the carbon source,after freezing and drying,the compounds CS(CS-600,CS-700,CS-800,CS-900)of Co_(9)S_(8)and Carbon are obtained by annealing the molten salts at different temperatures.The papers discusses effects of different annealing temperatures on the crystal structure,morphology and electrochemical properties of the products in a systematical manner.It is found that the cycle and rate properties of the Co_(9)S_(8)-carbon compound samples are much higher than those of pure Co_(9)S_(8)samples.At the calcination temperature of 700℃,the synthesized sample CS-700 has the highest specific capacity and the best cycle performance,and its discharge specific capacity can reach 898.6 mAh·g^(-1)after 100 charge/discharge cycles at 100 mA·g^(-1).This means that it can be used as a potential anode material for lithium-ion batteries.

关 键 词：负极材料 熔盐法 Co_(9)S_(8) 碳复合 锂离子电池 

分 类 号：TQ912[化学工程]