摘要
利用正交实验L33(9)探讨磷酸铁锂正极的制备工艺对不同倍率下电极工作性能的影响,并对电解液的匹配性进行研究。采用不同活性物质、导电剂和粘结剂配比制成磷酸铁锂正极,应用不同电解液组装成锂离子电池,选用17mA·g-1和170mA·g-1的工作电流密度对电池进行充放电循环测试。研究结果表明,在17mA·g-1倍率充放电条件下,最佳电极制备工艺是:活性物质、导电剂和粘结剂的质量百分比为85:7:8,匹配的电解液为LiPF6/EC-DEC-DMC(体积比1:1:1,浓度1mol·L-1);在170mA·g-1倍率充放电条件下,活性物质、导电剂和粘结剂的最佳质量百分比为80:12:8,与其相匹配的电解液为LiPF6/EC-DMC(体积比1:1,浓度1mol·L-1)。
The influences of the recipes for preparing the LiFePO4 cathode and the compositions of the electrolyte on the electrochemical performance of the prepared cathodes were studied by using the L3^3（9） Latin orthogonal experiment method. The LiFePO4 cathodes with different ratios of active material to conductor and to binder were prepared, and the charge-discharge performances of the prepared LiFePO4 cathodes were tested under the cycling current densities of 17 mA·g^-1 and 170 mA·g^-1 separately. The results show that, for preparing LiFePO4 cathode, the best ratio of active material to conductor and to binder is 85：7：8 （in weight） for charge-discharge circulation working at current density of 17 mA·g^-1, and is 80：12：8 for charge-discharge circulation working at current density of 170 mA·g^-1, As to the electrolytes used with the electrode mentioned above, the 1 mol·L^-1 LiPF6 solution with the solvent composition of EC ： DMC： DEC = 1：1：1 （volume ratio） is more suitable for the cells cycling at 17 mA·g^-1, and the 1 mol·L^-1 LiPF6 solution with the solvent composition ofEC ： DMC = 1：1 is better for the cell cycling at 170 mA·g^-1.
出处
《高校化学工程学报》
EI
CAS
CSCD
北大核心
2007年第1期54-58,共5页
Journal of Chemical Engineering of Chinese Universities
基金
国家自然科学基金(50236010
20476055)
上海市曙光学者奖励计划(03SG12)
关键词
LIFEPO4
正极
锂离子电池
制备工艺参数
电解液
LiFePO4
cathode
lithium-ion battery
preparation technological parameters
electrolytes
作者简介
张晓鸣（1981-），男，天津市人，上海交通大学硕士．
通讯联系人：马紫峰．E-mail：zfma@sjtu．edu．cn
