| Y3+掺杂LiV3O8正极材料电化学性能研究 |
| |
| 引用本文： | 刘永梅,刘守庆,梁坤.Y3+掺杂LiV3O8正极材料电化学性能研究[J].云南大学学报(自然科学版),2011,33(4):439. |
| |
| 作者姓名： | 刘永梅 刘守庆 梁坤 |
| |
| 作者单位： | 西南林业大学西南山地森林资源保育与利用重点实验室; |
| |
| 基金项目： | 云南省教育厅基金资助项目(2010Y291) |
| |
| 摘 要： | 利用固相合成干冷空气淬火法,合成了一系列Y3+掺杂的LiV3-yYyO8 (y=0,0.01,0.03,0.05,0.1,0.2)正极材料.XRD结果表明,Y3+掺杂量不同对LiV3O8结构的影响不同.适量Y3+掺杂能保持LiV3O8的原有结构,增大其d100值,同时降低材料的结晶度.当Y3+掺杂过多时,样品中会产生YVO4杂相.充放电循环、循环伏安(CV)及交流阻抗(EIS)测试结果表明,Y3+掺杂虽然降低了材料的初始容量,但适量的Y3+掺杂能稳定材料的循环性能.电池存放实验表明Y3+掺杂还能提高电池的存放性能.在高电压下存放15d后,掺杂样的放电容量保持率为94.2%,高于未掺杂样的88.2 %.
|
| 关 键 词： | LiV3O8 Y3+掺杂 存放性能 正极材料 |
| 收稿时间： | 2011-1-11 |
Study on the electrochemical and storable properties of LiV_3O_8 cathode material doped with Y~(3+) |
| |
| LIU Yong-mei,LIU Shou-qing,LIANG Kun.Study on the electrochemical and storable properties of LiV_3O_8 cathode material doped with Y~(3+)[J].Journal of Yunnan University(Natural Sciences),2011,33(4):439. |
| |
| Authors: | LIU Yong-mei LIU Shou-qing LIANG Kun |
| |
| Institution: | LIU Yong-mei,LIU Shou-qing,LIANG Kun(The Key Laboratory of Forest Resources Conservation and Use in the Southwest Mountains of China,Southwest Forestry University,Kunming 650224,China) |
| |
| Abstract: | A series of yttrium-doped lithium trivanadates LiV3-yYyO8(y=0,0.01,0.03,0.05,0.1 and 0.2) were synthesized by a new solid-state reaction.X-ray diffraction(XRD) tests show the different amount of yttrium doping has the different effects on the structure of LiV3O8,a proper amount of yttrium doping can retain its original structure,increase its d100 value and decrease its crystallinity.The charge-discharge,cyclic voltammetry(CV) and electrochemical impedance spectroscopy(EIS) tests show that a proper amount of... |
| |
| Keywords: | LiV3O8 Y3 doping storable performance cathodic material |
| 本文献已被 CNKI 等数据库收录！ |
| 点击此处可从《云南大学学报(自然科学版)》浏览原始摘要信息 |
| 点击此处可从《云南大学学报(自然科学版)》下载免费的PDF全文 |
|
