低用量水系负极粘结剂对锂电池性能的影响  

Effect of Low Dosage of Negative Water Binder on Performance of Lithium Battery

作　　者：庞洪川 李泓淼 户献雷 Pang Hongchuan;Li Hongmiao;Hu Xianlei(Guangzhou Tinci High-tech Materials Co.,Ltd.,Guangzhou 510760,China)

机构地区：[1]广州天赐高新材料股份有限公司,广东广州510760

出　　处：《广东化工》2025年第6期30-33,共4页Guangdong Chemical Industry

摘　　要：研究了传统粘结剂增加电池内阻、影响能量密度、加工性能限制、浆料稳定性问题以及动力学性能限制等问题,通过减少负极粘结剂的使用量,设计了两种低添加量的锂电池石墨负极配方。选用天赐材料Tinctive E300作为主要粘结剂,其总添加量分别为2.0%和2.5%,旨在提升电池的能量密度和动力学性能。采用湿法匀浆工艺制备浆料,展现出优异的假塑性流体特性和稳定性,有利于提高极片涂布的加工性能。其极片具有良好的剥离力和较低的电阻,有效减少掉粉现象,提升电池装配的可靠性。其电池电化学性能测试中表现出低内阻、低直流内阻(DCR)、优越的低温性能和倍率性能,显示出新配方的广泛应用潜力。Two graphite anode formulations for lithium batteries with low additive amounts were designed by reducing the amount of anode binder used,in response to the problems of traditional binder increasing the internal resistance of the battery,affecting the energy density,the limitation of the processing performance,the problem of slurry stability,and the limitation of the kinetic performance.Tinctive E300 was selected as the main binder,and its total additive amount was 2.0%and 2.5%,respectively,aiming to improve the energy density and kinetic performance of the battery.The slurry is prepared by wet homogenisation process,which demonstrates excellent pseudoplastic fluid properties and stability,which is conducive to improving the processing performance of the electrode sheet coating.Its electrode sheet has good peeling force and low resistance,which effectively reduces the phenomenon of powder fall and improves the reliability of battery assembly.Its battery electrochemical performance test shows low internal resistance,low DC internal resistance(DCR),superior low temperature performance and multiplier performance,indicating the potential of the new formulation for a wide range of applications.

关 键 词：锂离子电池 石墨负极 水性粘结剂 聚丙烯酸酯 电性能 

分 类 号：TQ436.5[化学工程]