| 荷电态对锰酸锂电池储存性能的影响 |
| |
| 引用本文： | 刘云建,李新海,郭华军,王志兴.荷电态对锰酸锂电池储存性能的影响[J].中南大学学报(自然科学版),2011(10). |
| |
| 作者姓名： | 刘云建 李新海 郭华军 王志兴 |
| |
| 作者单位： | 江苏大学材料科学与工程学院;中南大学冶金科学与工程学院; |
| |
| 基金项目： | 国家重点基础研究发展计划(“973”计划)项目(2007CB613607); 江苏大学高级人才启动基金资助项目(10JDG041) |
| |
| 摘 要： | 采用商品化的LiMn2O4和石墨作为正负极材料制作锰酸锂动力电池,研究锰酸锂电池在不同荷电态下的储存性能,并且利用扫描电镜(SEM)、X线衍射(XRD)、循环伏安(CV)和交流阻抗(AC)等分析检测手段表征LiMn2O4电极储存前后的结构、形貌和表面状态变化,测试锰酸锂电池储存前后的电化学性能。研究结果表明:锰酸锂在放电态下储存的容量恢复率最高,达到99.4%;满电储存后容量恢复率最低,为93.6%;储存后锰酸锂电池的循环性能均有所改善,其中满电储存后循环性能最好,170次循环容量保持率为89.7%,储存前170次循环容量保持率为85.4%;锰酸锂电池储存后容量衰减随着荷电态的增加而增加,这主要是由Mn溶解量以及储存后正极表面极化的增加而引起的。
|
| 关 键 词： | 锰酸锂 储存性能 电化学性能 衰减机理 荷电态 |
Effect of state of charge on storage performance of manganese spinel battery |
| |
| LIU Yun-jian,LI Xin-hai,GUO Hua-jun,WANG Zhi-xing.Effect of state of charge on storage performance of manganese spinel battery[J].Journal of Central South University:Science and Technology,2011(10). |
| |
| Authors: | LIU Yun-jian LI Xin-hai GUO Hua-jun WANG Zhi-xing |
| |
| Institution: | LIU Yun-jian1,2,LI Xin-hai2,GUO Hua-jun2,WANG Zhi-xing2 (1.School of Material Science and Engineering,Jiangsu University,Zhenjiang 212013,China,2.School of Metallurgical Science and Engineering,Central South University,Changsha 410083,China) |
| |
| Abstract: | The power battery was manufactured with the commercial LiMn2O4 and graphite.The storage performances of LiMn2O4 batteries at different charged states were studied.Structure,morphology and surface state change of the LiMn2O4 before and after storage were observed by scanning electron microscopy(SEM),X-ray diffraction(XRD),cyclic voltammograms(CV) and electrochemical impedance spectroscopy(EIS),respectively.The electrochemical performances of LiMn2O4 battery before and after storage were tested.The results sh... |
| |
| Keywords: | lithium manganese spinel storage performance electrochemical performance capacity fading mechanism state of charge |
| 本文献已被 CNKI 等数据库收录！ |
|
