| 三(三甲基硅烷)亚磷酸酯添加剂改善高镍三元正极材料的高电压循环性能 |
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| 引用本文： | 董庆雨,毛亚云,郭峰,程振杰,董厚才,陈鹏,康拓,吴晓东,沈炎宾,陈立桅.三(三甲基硅烷)亚磷酸酯添加剂改善高镍三元正极材料的高电压循环性能[J].无机化学学报,2019,35(6):1050-1058. |
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| 作者姓名： | 董庆雨 毛亚云 郭峰 程振杰 董厚才 陈鹏 康拓 吴晓东 沈炎宾 陈立桅 |
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| 作者单位： | 中国科学技术大学纳米技术与纳米仿生学院;中国科学院苏州纳米技术与纳米仿生研究所;上海大学材料科学与工程学院;中国科学技术大学纳米科学技术学院 |
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| 基金项目： | 国家科技部（No.2016YFB0100102）、中国科学院战略性先导专项（No.XDA09010600，XDA09010303）和国家自然科学基金（No.21625304，21733012）资助项目。 |
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| 摘 要： | 研究了三(三甲基硅烷)亚磷酸酯(TMSP)添加剂对高镍三元正极材料Li Ni_(0.83)Mn_(0.05)Co_(0.12)O_2(LNMC811)高电压循环性能的影响。结合电化学表征、理论计算、扫描电子显微镜(SEM)、透射电子显微镜(TEM)、X射线光电子能谱(XPS)、X射线衍射(XRD)等方法研究发现,在高电位(4.5 Vvs Li/Li~+)下,TMSP添加剂能够在LNMC811正极表面被氧化分解,生成一层富含导锂离子性能好的硅酸盐和电化学稳定的无机碳酸锂,且电解液主要分解产物(有机碳酸锂和氟化锂)含量较少的正极固体电解质界面(CEI)膜;分析表明覆盖在正极表面的薄而均匀的CEI膜,能够很好的降低充放电过程的极化电压,隔离电解液和正极的接触,减少电解液的分解,抑制金属离子的溶出,稳定正极晶体结构,使LNMC811材料能够在4.5 V(vs Li/Li~+)高电压循环时仍然保持良好的循环性能和倍率性能。
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| 关 键 词： | 高镍三元正极材料 三(三甲基硅烷)亚磷酸酯 锂离子电池 高能量密度 |
| 收稿时间： | 2019/1/18 0:00:00 |
| 修稿时间： | 2019/3/14 0:00:00 |
Tris(trimethylsilane) Phosphite Additive for Improving the High Voltage Cycling Performance of a Nickel-Rich Layered Oxide Cathode Material |
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| DONG Qing-Yu,MAO Ya-Yun,GUO Feng,CHENG Zhen-Jie,DONG Hou-Cai,CHEN Peng,KANG Tuo,WU Xiao-Dong,SHEN Yan-Bin and CHEN Li-Wei.Tris(trimethylsilane) Phosphite Additive for Improving the High Voltage Cycling Performance of a Nickel-Rich Layered Oxide Cathode Material[J].Chinese Journal of Inorganic Chemistry,2019,35(6):1050-1058. |
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| Authors: | DONG Qing-Yu MAO Ya-Yun GUO Feng CHENG Zhen-Jie DONG Hou-Cai CHEN Peng KANG Tuo WU Xiao-Dong SHEN Yan-Bin and CHEN Li-Wei |
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| Institution: | School of Nano Technology and Nano Bionics, University of Science and Technology of China, Hefei 230026, China;Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences, Suzhou, Jiangsu 215123, China,Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences, Suzhou, Jiangsu 215123, China;School of Materials Science and Engineering, Shanghai University, Shanghai 200444, China,School of Nano Technology and Nano Bionics, University of Science and Technology of China, Hefei 230026, China;Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences, Suzhou, Jiangsu 215123, China,School of Nano Technology and Nano Bionics, University of Science and Technology of China, Hefei 230026, China;Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences, Suzhou, Jiangsu 215123, China,Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences, Suzhou, Jiangsu 215123, China;School of Materials Science and Engineering, Shanghai University, Shanghai 200444, China,Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences, Suzhou, Jiangsu 215123, China;Nano Science and Technology Institute, University of Science and Technology of China, Suzhou, Jiangsu 215123, China,Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences, Suzhou, Jiangsu 215123, China,School of Nano Technology and Nano Bionics, University of Science and Technology of China, Hefei 230026, China;Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences, Suzhou, Jiangsu 215123, China,School of Nano Technology and Nano Bionics, University of Science and Technology of China, Hefei 230026, China;Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences, Suzhou, Jiangsu 215123, China and Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences, Suzhou, Jiangsu 215123, China |
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| Abstract: | |
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| Keywords: | nickel-rich layered oxide tris(trimethylsilane) phosphite lithium ion battery high energy density |
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