纳米Ag改性方式对锂氟化碳电池性能的影响  

Effect of nano-Ag modification methods on performance of lithium fluoride carbon batteries

作　　者：张红梅 甘潦 王开琼 王庆杰 石斌 ZHANG Hongmei;GAN Liao;WANG Kaiqiong;WANG Qingjie;SHI Bin(Guizhou Meiling Power Source Co.,Ltd.,of CASIC,Zunyi Guizhou 563003,China;Air Force Unit 93147,Zunyi Guizhou 563003,China)

机构地区：[1]贵州梅岭电源有限公司,贵州遵义563003 [2]空军93147部队,贵州遵义563003

出　　处：《电源技术》2023年第9期1164-1168,共5页Chinese Journal of Power Sources

基　　金：国防基础科研计划(JCKY2019204C025)。

摘　　要：分别采用纳米Ag线和纳米Ag颗粒对氟化碳材料进行复合,以CF_(x)、CF_(x)@Ag1(复合纳米Ag线)、CF_(x)@Ag2(复合纳米Ag颗粒)为正极活性物质,制备5 Ah软包装锂氟化碳电池,研究纳米Ag线和纳米Ag颗粒复合对电池电化学性能的影响。使用X射线衍射(XRD)、扫描电子显微镜(SEM)、能量散射光谱(EDS)对材料的形貌结构进行表征分析并利用四探针测定其电导率,采用恒流放电测试及交流阻抗对电池的电化学性能进行分析,并测定电池恒流放电下的温度变化。结果表明,纳米Ag线和纳米Ag颗粒复合均可以提高CF_(x)材料的电导率,以改性材料为活性物质制备的电池具有更好的电化学性能和热稳定性,其中CF_(x)@Ag1的改性效果好于CF_(x)@Ag2。Nano-Ag wires and nano-Ag particles were used to composite with fluorinated carbons materials.CF_(x),CF_(x)@Ag1(compositing nano-Ag wires),and CF_(x)@Ag2(compositing nano-Ag particles)were used as positive active materials to prepare 5 Ah flexible packaging lithium fluorinated carbons cells to research the combination effect of nano-Ag wires and nano-Ag particles with CF_(x) on the electrochemical performances of the battery.The morphologies and structures of the materials were characterized and analyzed by XRD,SEM,and EDS,and the electrical conductivities were measured by four probes.The electrochemical performances of the battery were analyzed by constant current discharge and AC impedance test;and then,the temperature changes under constant current discharge of the cells were measured during different rates to study cells heating effect.The results show that both nano-Ag wires and nano-Ag particles can improve the electrical conductivity of CF_(x) materials,and the batteries prepared with the compound materials as active positive materials have better electrochemical performances and thermal stability.Among them,the modification effect of CF_(x)@Ag1 is better than that of CF_(x)@Ag2.

关 键 词：CF_(x) 纳米Ag线 纳米Ag颗粒 锂氟化碳电池 热稳定性 

分 类 号：TM912[电气工程—电力电子与电力传动]