功率对热等离子法制备纳米SiO的影响及其锂电池性能测试  

Effect of Power on Preparation of Nano-SiO by Thermal Plasma Method and Performance Test of Lithium Battery

作　　者：陈新亮 万小涵 马文会[1,2] 魏奎先[1] 李绍元[1] CHEN Xinliang;WAN Xiaohan;MA Wenhui;WEI Kuixian;LI Shaoyuan(National Engineering Laboratory for Vacuum Metallurgy,Kunming University of Science and Technology,Kunming 650093,China;State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization,Kunming University of Science and Technology,Kunming 650093,China)

机构地区：[1]昆明理工大学真空冶金国家工程实验室,昆明650093 [2]昆明理工大学复杂有色金属资源清洁利用国家重点实验室,昆明650093

出　　处：《有色金属工程》2020年第7期1-7,共7页Nonferrous Metals Engineering

基　　金：国家自然科学基金资助项目(51904134,51974143);国家重点研发计划(2018YFC1901801,2018YFC1901805)。

摘　　要：利用热等离子发生器,分别在功率为13.2、14.3和15.4 kW时制得了比表面积为84.16、126.26、172.02 m^2/g的纳米SiO颗粒,与原始SiO颗粒比表面积1.95 m^2/g相比,产物比表面积随等离子体功率升高而增大。TEM结果表明制备出的纳米SiO颗粒形貌为近球形,且随等离子体功率升高,得到的粒径越小分布越均匀。分别以3种功率制备纳米SiO为负极活性材料测试锂电池性能,首次放电容量分别为1732、1771、1924 mA·h/g,50次循环后其容量保持在313、316、395 mA·h/g;而原始SiO颗粒首次放电容量约为1291 mA·h/g,50次循环后,容量保持在75 mA·h/g,表明利用热等离子法制备的纳米SiO的电化学性能得到了极大的提升。Nano-SiO particles were prepared using thermal plasma method and its application as anode material of lithium ion battery was also investigated.Various thermal plasma power of 13.2,14.3 and 15.4 kW were examined respectively,and specific surface areas of prepared nano-SiO particles are 84.16,126.26 and 172.02 m^2/g,respectively.Comparing with specific surface area of original SiO particles of 1.95 m^2/g,significant increments was achieved by thermal plasma treatment,and its value increased along with plasma power.According to TEM characterization nano-SiO particles were nearly spherical.When plasma power was increased,particles size decreased and,its distribution became more uniform.Nano-SiO particles derived from threee different thermal plasma power were also investigated as anode material of lithium-ion battery.First discharge capacity was 1732,1771,1924 mA·h/g,and its capacity was maintained at 313,316,395 mA·h/g after 50 cycles.While initial discharge capacity of the original SiO particles was about 1291 mA·h/g,and maintained at 75 mA·h/g after 50 cycles.Accordingly,lithium-ion battery with as-prepared nano-SiO anode exhibited improved electrochemical performance.

关 键 词：热等离子法 纳米SIO 负极材料 

分 类 号：TQ174[化学工程—陶瓷工业]