Sn-MOF衍生的多相复合材料的制备及储锂性能  

Preparation and lithium storage properties of Sn-MOF derived multiphase composites

作　　者：田光梅 魏润源 王尧尧 王北平[1,3] TIAN Guangmei;WEI Runyuan;WANG Yaoyao;WANG Beiping(School of Materials Science and Engineering,North Minzu University,Yinchuan Ningxia 750021,China;Jinchuan Group Co.,Ltd.,Jinchang Gansu 737100,China;Research Center of Silicon Target and Silicon-Carbon Negative Material Engineering Technology,Yinchuan Ningxia 750021,China)

机构地区：[1]北方民族大学材料科学与工程学院,宁夏银川750021 [2]金川集团职工培训中心,甘肃金昌737100 [3]宁夏硅靶及硅碳负极材料工程技术研究中心,宁夏银川750021

出　　处：《电源技术》2024年第6期1062-1068,共7页Chinese Journal of Power Sources

基　　金：宁夏自然科学基金项目(2020AAC03189);北方民族大学研究生创新项目(YCX22148)。

摘　　要：作为锂离子电池负极材料,金属锡及锡氧化物随锂离子的嵌入与脱出会产生巨大的体积变化,导致循环过程中储锂容量及循环性能急剧衰减。以氯化亚锡(SnCl_(2))和对苯二甲酸为原料,通过水热法制备了Sn-MOF衍生的金属氧化物@C复合材料。研究结果表明,SC-1样品中的主相SnO_(2)及少量的SnO均匀分布在具有丰富介孔结构的无定形碳基体中,相较于其他两个样品,表现出更好的容量性能、高倍率充放电性能和电化学结构稳定性。SC-1样品在0.1 A/g下充电比容量达到1092.4 mAh/g,在2 A/g下充电比容量仍达到308.9 mAh/g,经过100次循环后容量保持率为56.8%。As anode materials for lithium ion batteries,metal tin and tin oxides undergo significant volume changes with the insertion and removal of lithium ions,leading to a sharp decline in lithium storage capacity and cycling performance during the cycling process.Using stannous chloride(SnCl_(2))and terephthalic acid as raw materials,the Sn-MOF derived metal oxide@C composite materials were prepared through hydrothermal method.The results indicate that the main phase SnO_(2) and a small amount of SnO in the SC-1 sample uniformly distribute in the amorphous carbon matrix with rich mesoporous structure.Compared with the other two samples,it shows better capacity performance,high-rate charge discharge performance and electrochemical structural stability.The charge specific capacity of SC-1 sample is 1092.4 mAh/g at 0.1 A/g,and 308.9 mAh/g at 2 A/g.After 100 cycles,the capacity retention is 56.8%.

关 键 词：锂离子电池 金属氧化物复合材料 水热法 电化学性能 

分 类 号：TM912.9[电气工程—电力电子与电力传动]