| 钨掺杂对锂离子电池LiNiO2正极材料性能的影响 |
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| 引用本文： | 孔祥泽,李东林,王子匀,贺欣,李童心,周小荣,樊小勇,苟蕾.钨掺杂对锂离子电池LiNiO2正极材料性能的影响[J].无机化学学报,2019,35(7):1169-1175. |
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| 作者姓名： | 孔祥泽 李东林 王子匀 贺欣 李童心 周小荣 樊小勇 苟蕾 |
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| 作者单位： | 长安大学材料科学与工程学院新能源材料与器件研究所 |
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| 基金项目： | 国家自然科学基金（No.21473014，21073021）资助项目 |
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| 摘 要： | 采用溶胶-凝胶法制备了钨掺杂镍酸锂正极材料(LiNi_(1-x)W_xO_2,x=1%、3%),研究了钨掺杂对LiNiO_2正极材料电化学性能的影响。结果表明,钨掺杂明显地改善了LiNiO_2的充放电循环性能,在100 mA·g~(-1)的电流密度和2.5～4.5 V电压范围的测试条件下,LiNi_(0.99)W_(0.01)O_2材料循环400次后的容量保持率为62.51%,而LiNiO_2在相同循环条件下的保持率仅为47.06%。同时,钨掺杂也提升了LiNiO_2的充放电倍率性能,掺杂材料在每一个倍率下放电比容量均高于未掺杂材料。
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| 关 键 词： | 锂离子电池 LiNiO2 钨掺杂 电化学性能 |
| 收稿时间： | 2018/12/26 0:00:00 |
| 修稿时间： | 2019/5/6 0:00:00 |
Effect of W-Doping on Electrochemical Performance of LiNiO2 Cathode for Lithium-Ion Batteries |
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| KONG Xiang-Ze,LI Dong-Lin,WANG Zi-Yun,HE Xin,LI Tong-Xin,ZHOU Xiao-Rong,FAN Xiao-Yong and GOU Lei.Effect of W-Doping on Electrochemical Performance of LiNiO2 Cathode for Lithium-Ion Batteries[J].Chinese Journal of Inorganic Chemistry,2019,35(7):1169-1175. |
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| Authors: | KONG Xiang-Ze LI Dong-Lin WANG Zi-Yun HE Xin LI Tong-Xin ZHOU Xiao-Rong FAN Xiao-Yong and GOU Lei |
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| Institution: | New Energy Materials and Devices Laboratory, School of Materials Science and Engineering, Chang''an University, Xi''an 710064, China,New Energy Materials and Devices Laboratory, School of Materials Science and Engineering, Chang''an University, Xi''an 710064, China,New Energy Materials and Devices Laboratory, School of Materials Science and Engineering, Chang''an University, Xi''an 710064, China,New Energy Materials and Devices Laboratory, School of Materials Science and Engineering, Chang''an University, Xi''an 710064, China,New Energy Materials and Devices Laboratory, School of Materials Science and Engineering, Chang''an University, Xi''an 710064, China,New Energy Materials and Devices Laboratory, School of Materials Science and Engineering, Chang''an University, Xi''an 710064, China,New Energy Materials and Devices Laboratory, School of Materials Science and Engineering, Chang''an University, Xi''an 710064, China and New Energy Materials and Devices Laboratory, School of Materials Science and Engineering, Chang''an University, Xi''an 710064, China |
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| Abstract: | W-doping LiNiO2 (LiNi1-xWxO2, x=1% and 3%) cathode materials were prepared by sol-gel method. The effects of W-doping on electrochemical performances of LiNiO2 materials were studied. The results showed that W-doping significantly improved the cycle performance of LiNiO2 during charge-discharge process. The capacity retention of the LiNi0.99W0.01O2 was 62.51% at a current density of 100 mA·g-1 after 400 cycles in the voltage of 2.5~4.5 V, while the LiNiO2 was only 47.06%. In addition, the rate performance of LiNiO2 was improved at the same current rates. |
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| Keywords: | Li-ions batteries LiNiO2 W-doping electrochemical performance |
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