阮丁山,李玲,杜柯,毛林林,李斌,方庆城,徐振鹏,胡国荣.Mg-Y共掺杂高电压钴酸锂正极材料的合成及其性能研究[J].稀有金属材料与工程,0,():-.[Ruan Ding-shan,Li Ling,Du Ke,Mao Lin-lin,Li Bin,Fang Qing-cheng,Xu Zhen-peng,Hu Guo-rong.The synthesis of Mg-Y doped Cobalt Oxide cathode material and the studies on its performance in high voltage[J].Rare Metal Materials and Engineering,0,():-].
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Mg-Y共掺杂高电压钴酸锂正极材料的合成及其性能研究
投稿时间:2020-05-14  修订日期:2020-06-03
中文关键词:  锂离子电池  正极材料  钴酸锂  掺杂改性
基金项目:
中文摘要:
      将Co3O4、Li2CO3、Mg(OH)2和Y2O3按一定化学计量比称取并混合均匀后,采用高温固相法合成LiCo1-x-yMgxYyO2正极材料并探究了Mg-Y共掺杂对钴酸锂高电压性能的影响。采用X射线衍射(XRD)和扫描电镜(SEM)分别表征其晶体结构和形貌。LiCo1-x-yMgxYyO2正极材料高电压性能测试,结果表明选择Mg掺杂量为0.2wt%下,当Y掺杂量的质量百分数为0.10%wt时,在3.0-4.6V电压范围内0.5C下的初始放电比容量为212.3mAh/g,循环50圈的容量保持率为96.28%。4C大倍率下,未掺杂Y元素样品容量保持率为54.92%,相比之下Y掺杂后容量保持率提高为60.43%。
The synthesis of Mg-Y doped Cobalt Oxide cathode material and the studies on its performance in high voltage
英文关键词:lithium-ion battery  cathode material  LiCoO2  doped
英文摘要:
      In order to improve the lifetime of the Lithium-ion battery, Mg-Y co-doped LiCoO2 was prepared by high temperature solid phase synthesis, with Co3O4, Li2CO3, Mg(OH)2 and Y2O3 as raw materials. The structure and morphology were characterized by X-ray diffraction (XRD) and scanning electron microscpoe (SEM). The battery achieved best electrochemical performance when the cathode is doped with 0.10wt% yttrium and 0.20wt% magnesium. The results of electrochemical performance showed that the initial discharge capacity was 212.3 mAh/g at 0.5C, 3.0-4.6V and with the outstanding capacity retention of 96.28% after 50 cycles at 3.0-4.6V. The discharge capacity of co-doped LiCoO2 at 4.0C remained 60.43% of the discharge capacity at 0.2C, while that of Mg only doped LiCoO2 is only 54.92%.
作者单位
阮丁山 广东邦普循环科技有限公司 
李玲 广东邦普循环科技有限公司 
杜柯 中南大学冶金与环境学院 
毛林林 广东邦普循环科技有限公司 
李斌 广东邦普循环科技有限公司 
方庆城 广东邦普循环科技有限公司 
徐振鹏 广东邦普循环科技有限公司 
胡国荣 中南大学冶金与环境学院 
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