MCMB/水性粘结剂体系锂离子电池负极制备工艺研究  

STUDY ON PREPARATION TECHNOLOGY OF THE CATHODE IN MCMB/AQUEOUS BINDER SYSTEM FOR LITHIUM ION BATTERY

作　　者：郭雪飞[1] 王成扬[1] 张晓林[1] 王圆方 

机构地区：[1]天津大学化工学院绿色合成与转化教育部重点实验室,天津300072 [2]天津市铁诚电池材料有限公司,天津300110

出　　处：《炭素》2006年第4期38-44,共7页Carbon

摘　　要：在锂离子电池炭负极的制备中,粘结剂和导电炭黑用量、不同的碾压及封装条件都将影响电池的电化学性能。通过循环伏安及恒电流充放电测量技术,研究了中间相炭微球(M CM B)/水性粘结剂负极制备中上述因素的影响,发现水性粘结剂含量为2w t%(羰甲基纤维素钠∶丁苯橡胶=1∶1,质量比)、导电炭黑含量为3w t%、负极碾压压力为25M Pa、封装压力50M Pa时,M CM B作为负极材料时表现出了较好的充放电性能,可逆放电容量达到了320.3mA h/g。且水性粘结剂工艺性能良好,可以考虑代替成本高且对环境有污染的有机粘结剂。The difference amount of the binder and additive carbon black,rolling pressure of the cathode and encapsulation pressure could affect the performance of the lithium ion batteries distinctly. The influence of above factors in cathode preparation of meso--carbon microbeads（MCMB）/aqueous binder system on performances of lithium ion battery was investigated by means of electrochemical and cyclic voltammetry measurements. The electrochemical measurements show that MCMB cathode with 2wt%binder, 3wt% additive carbon black, 25MPa rolling pressure and 50MPa encapsulation pressure, has good performance of the charge and dischage,its first reversible discharge capacity is 320. 3 mAh/g. At the same time, aqueous binder applied in the batteries shows excellent performance, it could be considered to replace the organic binder which is expensive and pollutant.

关 键 词：锂离子电池 水性粘结剂 炭黑 充放电性能 循环伏安法 

分 类 号：TM912.9[电气工程—电力电子与电力传动]