| 尖晶石锰酸锂的柠檬酸辅助溶胶-凝胶法合成及电化学表征 |
| |
| 引用本文： | 王超,刘兴泉,张峥,向小春,刘宏基.尖晶石锰酸锂的柠檬酸辅助溶胶-凝胶法合成及电化学表征[J].化工科技,2011,19(6):1-6. |
| |
| 作者姓名： | 王超 刘兴泉 张峥 向小春 刘宏基 |
| |
| 作者单位： | 电子科技大学微电子与固体电子学院电子薄膜与集成器件国家重点实验室,四川成都,610054 |
| |
| 基金项目： | 国家自然科学基金资助项目，电子科技大学杰出人才引进项目资助 |
| |
| 摘 要： | 以醋酸锰、氢氧化锂为原料,以柠檬酸为络合剂,n(柠檬酸):n(锂)=1:1,采用柠檬酸辅助溶胶-凝胶法制备了富锂尖晶石Li1+xMn2O4 (x=0,0.02,0.05,0.07),采用TG-DTA、XRD、SEM分别对前驱体和目标材料进行了表征,采用恒流充放电及循环伏安(CV)测试对材料进行了电化学性能表征,考察了不...
|
| 关 键 词： | 尖晶石锰酸锂 柠檬酸络合物 溶胶-凝胶法 锂离子电池 正极材料 |
Synthesis and electrochemical characterizations of spinel LiMn2O4 by citric acid-assisted sol-gel method |
| |
| WANG Chao,LIU Xing-quan,ZHANG Zheng,XIANG Xiao-chun,LIU Hong-ji.Synthesis and electrochemical characterizations of spinel LiMn2O4 by citric acid-assisted sol-gel method[J].Science & Technology In Chemical Industry,2011,19(6):1-6. |
| |
| Authors: | WANG Chao LIU Xing-quan ZHANG Zheng XIANG Xiao-chun LIU Hong-ji |
| |
| Affiliation: | (School of Microelectronics and Solid State Electronics,State Key Laboratory of Electronic Thin Film and Integrated Devices,University of Electronic Science and Technology of China,Chengdu 610054,China) |
| |
| Abstract: | The spinel Li1＋xMn2O4（x=0,0.02,0.05,0.07）cathode materials were prepared by a citric acid-assisted sol-gel method using LiOH and Mn（CH3COO）2 as raw materials and citric acid as the chelating agent,the molar ratio of citric acid to Li was 1∶1,and the precursors and resultant materials were characterized by TG-DTA,SEM and XRD,respectively.The electrochemical properties of the materials were investigated by galvanostatic charge and discharge and CV test.The influence of Li/Mn molar ratios on the electrochemical properties of Li1＋xMn2O4 cathode materials was examined.The results revealed that the optimal sintering temperature was 750 ℃,the well-defined pure cubic spinel phase can be obtained by calcining the precursor at 750 ℃.The optimal Li/Mn molar ratio was 1.05∶2,and the initial discharge capacity of Li1.05Mn2O4 was 124.5 mAh/g at 0.5C and 3.4~4.35V range,it remained 92.5% of the initial specific discharge capacity after 90 cycles.The Li1.05Mn2O4 displayed better electrochemical performance. |
| |
| Keywords: | Spinel LiMn2O4 Citric acid complex Sol-gel method Lithium ion batteries Cathode materials |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
|
