Design and Preparation of Soluble Polyimide Binder With Random Copolymerized Rigid-Flexible Segments for Lithium Ion Batteries
Chenglu Liang
School of Materials Science and Hydrogen Energy, Foshan University, Foshan, People's Republic of China
Guangdong Dowstone Technology Company, Foshan, People's Republic of China
Department of Materials Science and Engineering, Fujian University of Technology, Fuzhou, China
Lab of Advanced Elastomer, South China University of Technology, Guangzhou, China
Contribution: Conceptualization (lead), Data curation (lead), Investigation (lead), Methodology (lead), Writing - original draft (lead), Writing - review & editing (lead)
Search for more papers by this authorZhengyang Li
Department of Materials Science and Engineering, Fujian University of Technology, Fuzhou, China
Contribution: Data curation (equal), Formal analysis (equal), Investigation (equal)
Search for more papers by this authorYuan Chen
Department of Materials Science and Engineering, Fujian University of Technology, Fuzhou, China
Contribution: Data curation (equal), Formal analysis (equal), Investigation (equal)
Search for more papers by this authorCorresponding Author
Yi Zhang
School of Materials Science and Hydrogen Energy, Foshan University, Foshan, People's Republic of China
Guangdong Dowstone Technology Company, Foshan, People's Republic of China
Correspondence:
Yi Zhang ([email protected])
Yukun Chen ([email protected])
Contribution: Funding acquisition (lead), Project administration (lead), Supervision (lead), Writing - review & editing (lead)
Search for more papers by this authorYang Liu
Guangdong Dowstone Technology Company, Foshan, People's Republic of China
Department of Materials Science and Engineering, Fujian University of Technology, Fuzhou, China
Lab of Advanced Elastomer, South China University of Technology, Guangzhou, China
Contribution: Conceptualization (equal), Data curation (equal), Investigation (equal), Project administration (equal)
Search for more papers by this authorCorresponding Author
Yukun Chen
Lab of Advanced Elastomer, South China University of Technology, Guangzhou, China
Correspondence:
Yi Zhang ([email protected])
Yukun Chen ([email protected])
Contribution: Conceptualization (equal), Project administration (equal), Supervision (equal), Writing - review & editing (equal)
Search for more papers by this authorChenglu Liang
School of Materials Science and Hydrogen Energy, Foshan University, Foshan, People's Republic of China
Guangdong Dowstone Technology Company, Foshan, People's Republic of China
Department of Materials Science and Engineering, Fujian University of Technology, Fuzhou, China
Lab of Advanced Elastomer, South China University of Technology, Guangzhou, China
Contribution: Conceptualization (lead), Data curation (lead), Investigation (lead), Methodology (lead), Writing - original draft (lead), Writing - review & editing (lead)
Search for more papers by this authorZhengyang Li
Department of Materials Science and Engineering, Fujian University of Technology, Fuzhou, China
Contribution: Data curation (equal), Formal analysis (equal), Investigation (equal)
Search for more papers by this authorYuan Chen
Department of Materials Science and Engineering, Fujian University of Technology, Fuzhou, China
Contribution: Data curation (equal), Formal analysis (equal), Investigation (equal)
Search for more papers by this authorCorresponding Author
Yi Zhang
School of Materials Science and Hydrogen Energy, Foshan University, Foshan, People's Republic of China
Guangdong Dowstone Technology Company, Foshan, People's Republic of China
Correspondence:
Yi Zhang ([email protected])
Yukun Chen ([email protected])
Contribution: Funding acquisition (lead), Project administration (lead), Supervision (lead), Writing - review & editing (lead)
Search for more papers by this authorYang Liu
Guangdong Dowstone Technology Company, Foshan, People's Republic of China
Department of Materials Science and Engineering, Fujian University of Technology, Fuzhou, China
Lab of Advanced Elastomer, South China University of Technology, Guangzhou, China
Contribution: Conceptualization (equal), Data curation (equal), Investigation (equal), Project administration (equal)
Search for more papers by this authorCorresponding Author
Yukun Chen
Lab of Advanced Elastomer, South China University of Technology, Guangzhou, China
Correspondence:
Yi Zhang ([email protected])
Yukun Chen ([email protected])
Contribution: Conceptualization (equal), Project administration (equal), Supervision (equal), Writing - review & editing (equal)
Search for more papers by this authorFunding: This work was supported by National Natural Science Foundation of China (52131308).
[Correction added on January 30, 2025, after first online publication: Affiliation details for Chenglu Liang was updated]
ABSTRACT
Binders play a critical role in the preparation and operation of electrodes in lithium-ion batteries (LIBs). Developing new binding materials with high affinity to Li ions and resistance to higher voltages was desirable for the practical applications of LIBs. In this work, soluble polyimide binder (PI) with random copolymerized rigid-flexible segments were synthesized and evaluated as cathode binder for the typical lithium iron phosphate cathode material in terms of cycling performances, rate capability, and electrochemical impedance. By introducing the polar and soft ether segment into the rigid PI chains, the NMP-soluble PI precursors were obtained. The rigid-flexible segments in the PI binders work synergistically during the electrochemical process, in which the rigid segments of aromatic units with strong lithiophilic CO group provided the necessary mechanical support and affinity with electrolytes, while the flexible segments endow the high solubility and buffer effect to the volume change during the charge/discharge process. Moreover, the 3,5-diaminobenzoic acid (DABA) working as the crosslinking unit was introduced during the synthesis and the addition ratios were optimized. The as-optimized PI binders exhibited superior rate performances and comparable cycling stability when compared with the commercial PVDF binder, demonstrating the great potential for PI binder in the LIBs systems.
Conflicts of Interest
The authors declare no conflicts of interest.
Open Research
Data Availability Statement
The data that support the findings of this study are available from the corresponding author upon reasonable request.
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