| 钟海燕,胡立新,张金波,胡伟.Al3+掺杂LiMn2O4的制备及高温循环性能研究[J].有色金属材料与工程,2014,35(1):7-9,32. |
| Al3+掺杂LiMn2O4的制备及高温循环性能研究 |
| Study on Electrochemical Performance Al3+ Doping on LiMn2O4 |
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| DOI： |
| 中文关键词: LiMn2O4 沉淀法 正极材料 电化学性能 |
| 英文关键词:LiMn2O4 co-precipitation method cathode material electrochemical performance |
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| 中文摘要: |
| 采用沉淀法合成LiMn2-xAlxO4（x=0.01，0.05，0.10，0.20），pH的范围为10.5～10.6，搅拌速度为350 r/min，水浴温度为55℃，分两次烧结.首次煅烧温度为680℃，保温时间为18 h；第二次煅烧温度为850℃，保温时间为18 h.利用X射线衍射、扫描电子显微镜和电化学方法测试最终产物.测试结果表明：Al3+的掺入有效地改善了LiMn2O4的高温循环性能，使其高温循环容量衰减得到了有效的抑制，尤其当Al3+的掺入量为0.05时，有比其他掺杂量更优的性能. |
| 英文摘要: |
| Co-precipitation method was adopted to get synthesized LiMn2-xAlxO4(x=0,0.01,0.05,0.10,0.20),the pH value 10.5~10.6,the intensity of stirring 350 r/m,water temperature 55℃,two-stage sintering with 680℃ as the first-stage temperature and 850℃ as the second-stage temperature,holding time 18 h.Its performances were tested and studied by X-ray diffraction measurements,scanning electron microscope and electrochemical experiments.Test results show that the cycling performance of LiMn2O4 at high temperature was improved significantly by adding in doping Al3+ and capacity losing during cycling under high temperature was effectively suppressed has a better high-temperature cycle performance. |
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