| 新型成膜添加剂CH3COONH4对石墨负极电性能的改善 |
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| 引用本文： | 张晓丽,张丽娜,郑洪河,仇晓阳,朱旭.新型成膜添加剂CH3COONH4对石墨负极电性能的改善[J].内蒙古大学学报(自然科学版),2012,43(5):514-519. |
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| 作者姓名： | 张晓丽 张丽娜 郑洪河 仇晓阳 朱旭 |
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| 作者单位： | 1. 商丘师范学院化学化工学院,河南商丘,476000
2. 河南师范大学化学与环境科学学院,河南新乡,453002 |
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| 基金项目： | 国家自然科学基金资助项目(No.21045003);河南省教育厅自然科学基金资助项目(No.2011B150028) |
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| 摘 要： | 应用循环伏安和恒电流充放电等电化学方法,结合微观测试手段傅里叶变换红外光谱(FTIR)和扫描电镜(SEM),剖析了电解液中加入少量CH3COONH4后对电极表面SEI膜的影响.通过与空白溶液比较显示,添加CH3COONH4能显著提高天然石墨负极首次循环过程中的充放电容量,降低不可逆容量损失,提高电极的循环性能和倍率充放电性能.扫描电镜和电极表面SEI膜组分的FTIR分析表明,添加适宜浓度的CH3COONH4有助于改善天然石墨的电化学性能.
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| 关 键 词： | 锂离子电池 天然石墨 CH3COONH4 成膜添加剂 电化学性能 |
Improvement of CH3COONH4-New Film-Forming Additive on Electrical Properties of the Graphite Cathode |
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| ZHANG Xiao-li
,
ZHANG Li-na
,
ZHENG Hong-he
,
QIU Xiao-yang
,
ZHU Xu.Improvement of CH3COONH4-New Film-Forming Additive on Electrical Properties of the Graphite Cathode[J].Acta Scientiarum Naturalium Universitatis Neimongol,2012,43(5):514-519. |
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| Authors: | ZHANG Xiao-li ZHANG Li-na ZHENG Hong-he QIU Xiao-yang ZHU Xu |
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| Institution: | 1(1.School of Chemistry and Chemical Engineering,Shangqiu Normal College, Shangqiu 476000,China;2.College of Chemistry and Environmental Science, Henan Normal University,Xinxiang 453002,China) |
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| Abstract: | The electrochemical behavior of graphite cathode based on blank solution and adding additive solution were investigated by cyclic voltammetry and galvanostatic charge-discharge techniques.FTIR analysis and SEM were used to study the electrode SEI films after cycling.Compared with the blank solution,adding a small amount of CH3COONH4 into 1mol/L LiPF6/EC+EMC electrolyte solution could significantly increase the natural graphite cathode charge-discharge capacity,lower the irreversible capacity loss during the first cycle,and increase the electrode cycling performance and the charge and discharge capacity performance.FTIR analysis and SEM indicated that adding appropriate concentration of CH3COONH4 could help to improve the electrochemical performance of a natural graphite. |
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| Keywords: | lithium-ion batteries graphite cathode CH3COONH4 film-forming additive electrochemical performance |
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