Clarification of the dispersion mechanism of three typical chemical dispersants in lithium-ion battery (LIB) slurry  

作　　者：Zhilong Wang Zehua Wang Xiaodong Liu Xiayi Liu Tong Zhao Masahiro Takei 

机构地区：[1]Faculty of Mechanical and Precision Instrument Engineering,Xi'an University of Technology,Xi'an,710048,China [2]Division of Artificial Systems Science,Graduate School of Engineering,Chiba University,Chiba,2638522,Japan

出　　处：《Particuology》2023年第9期90-102,共13页颗粒学报（英文版）

基　　金：support from National Natural Science Foundation of China(grant No.52006176,51876175,and 62101438);the Key Research and Development Project of Shaanxi Province(grant No.2022kw-18).

摘　　要：This paper mainly clarified the dispersion mechanism of three typical chemical dispersants which are polyethylene glycol octylphenyl ether(Triton X-100,T-100),polyethylene pyrrolidone(PVP)and carboxymethyl cellulose(CMC)within lithium-ion battery(LIB)slurry.Initially,the optimum amounts of T-100,PVP and CMC are selected from 0%,0.5%,1.5%and 2.5%by evaluating the impedance of LIB slurry in the case of adding each typical chemical dispersant with EIS method.Moreover,the impedance spectrum of three different slurry samples which are PVDF-NMP solution,LiCoO_(2) slurry and Carbon Black(CB)slurry with the optimum amount of each dispersant are also investigated.After using SEM and C element distribution images of LIB slurry to verify the correctness of the dispersion mechanism of each dispersant,it is concluded that the dispersion CMC with its optimum amount 1.5%is the best one to promote the formation of conductive paths and CB-coated LiCoO_(2) network structure within LIB slurry,which has the considerably potential to improve the performance of LIB.

关 键 词：Lithium-ion battery(LIB)slurry Chemical dispersants Electrochemical characterizations Electrical impedance spectroscopy(EIS) 

分 类 号：TM912[电气工程—电力电子与电力传动]