A Fluorine-free Polysulfone-Polyamide-Polyimide Copolymer Binder for LiNi0.8Co0.1Mn0.1O2 Cathode in Lithium-ion Battery

Hao Peng; Lin Liu; Qiao Zhang; Shuhao Liu; Man Lin; Hao Li; Yonghong Deng; Chuanlai Jiao; Chaoyang Wang; Hongli Xu

doi:10.1007/s10118-025-3281-2

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A Fluorine-free Polysulfone-Polyamide-Polyimide Copolymer Binder for LiNi_0.8Co_0.1Mn_0.1O₂ Cathode in Lithium-ion Battery

RESEARCH ARTICLE | Updated：2025-07-15

- A Fluorine-free Polysulfone-Polyamide-Polyimide Copolymer Binder for LiNi_0.8Co_0.1Mn_0.1O₂ Cathode in Lithium-ion Battery
- A Fluorine-free Polysulfone-Polyamide-Polyimide Copolymer Binder for LiNi_0.8Co_0.1Mn_0.1O₂ Cathode in Lithium-ion Battery
- 高分子科学（英文） 2025年43卷第7期页码：1146-1154
- Affiliations：
  
  a.School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin 300130, China
  b.Department of Materials Science and Engineering, School of Innovation and Entrepreneurship, Institute of Innovative Materials, Southern University of Science and Technology, Shenzhen 518055, China
  c.Research Institute of Materials Science, South China University of Technology, Guangzhou 510640, China
- Author bio：
  
  jiaocl@sustech.edu.cn (C.L.J.)
  zhywang@scut.edu.cn (C.Y.W.)
  xuhl3@sustech.edu.cn (H.L.X.)
- Funds：
  
  This work was financially supported by the Shenzhen Science and Technology Program (No. JCYJ20220818100407016), the National Natural Science Foundation of China (No. 22275059), Guangdong Special Support Program (No. 2021TX06L775), and high-level special funds (No. G03050K002).;Electronic supplementary information (ESI) is available free of charge in the online version of this article at http://doi.org/10.1007/s10118-025-3281-2.
- DOI：10.1007/s10118-025-3281-2
  中图分类号：
- 收稿：2024-10-30，
  
  修回：2024-11-29，
  
  录用：2024-12-09，
  
  网络首发：2025-02-10，
  
  纸质出版：2025-07-01
- Accepted：
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Peng, H.; Liu, L.; Zhang, Q.; Liu, S. H.; Lin, M.; Li, H.; Deng, Y. H.; Jiao, C. L.; Wang, C. Y.; Xu, H. L. A fluorine-free polysulfone-polyamide-polyimide copolymer binder for LiNi_0.8Co_0.1Mn_0.1O₂ cathode in lithium-ion battery. Chinese J. Polym. Sci. 2025, 43, 1146–1154 DOI: 10.1007/s10118-025-3281-2.

Hao Peng, Lin Liu, Qiao Zhang, et al. A Fluorine-free Polysulfone-Polyamide-Polyimide Copolymer Binder for LiNi_0.8Co_0.1Mn_0.1O₂ Cathode in Lithium-ion Battery[J]. Chinese Journal of Polymer Science, 2025, 43(7): 1146-1154. DOI: 10.1007/s10118-025-3281-2.
Peng, H.; Liu, L.; Zhang, Q.; Liu, S. H.; Lin, M.; Li, H.; Deng, Y. H.; Jiao, C. L.; Wang, C. Y.; Xu, H. L. A fluorine-free polysulfone-polyamide-polyimide copolymer binder for LiNi_0.8Co_0.1Mn_0.1O₂ cathode in lithium-ion battery. Chinese J. Polym. Sci. 2025, 43, 1146–1154 DOI: 10.1007/s10118-025-3281-2. DOI：

Hao Peng, Lin Liu, Qiao Zhang, et al. A Fluorine-free Polysulfone-Polyamide-Polyimide Copolymer Binder for LiNi_0.8Co_0.1Mn_0.1O₂ Cathode in Lithium-ion Battery[J]. Chinese Journal of Polymer Science, 2025, 43(7): 1146-1154. DOI: 10.1007/s10118-025-3281-2. DOI：

摘要

The coating on the surface of the NCM811@PVDF and NCM811@SPIO electrode are 12 nm and 3 nm

respectively. The uniform and continuous SPIO coating layer acts as a multifunctional protective layer on the surface of the NCM811 particles

effectively enhancing the stability of the cathode/electrolyte interface structure and suppressing side reactions at the electrode/electrolyte interface.

Abstract

High-voltage LiNi

0.8

0.1

(NCM811) cathodes are critical for enhancing the energy density of lithium-ion batteries (LIBs). The development of binders compatible with high-voltage NCM811 cathode materials is crucial to enhance the electrochemical performance of LIBs. However

the traditional fluoropolymer binder

poly(vinylidene difluoride)

(PVDF)

can potentially leach components or break down into poly(fluoroalkyl substances) (PFAS) chemicals

thereby contributing to PFAS contamination. A novel fluorine-free polymer

polysulfone-polyamide-polyimide (SPIO)

was designed and synthesized as a binder for NCM811 cathodes. The SPIO binder exhibits exceptional mechanical properties and superior electrochemical characteristics. The cathode film fabricated with SPIO demonstrated a remarkable delamination force of 8 N (390 N·m

–1

)

indicating robust adhesion. The Li||NCM811 cell incorporating the SPIO binder retained 80% of its initial capacity after 300 cycles at a current density of 0.2 C. In comparison

the control cells assembled with the PVDF binder retained only 52% of their capacities under the same cycling conditions. Furthermore

the SPIO binder exhibited improved compatibility with the electrolyte. Transmission electron microscopy analysis of the cathode films after 100 cycles revealed the formation of a uniform

dense

and continuous chemical-electrochemical interface (CEI) by the SPIO binder on the surface of the NCM811 particles

which significantly contributed to the enhancement of the electrochemical performance. These results highlight the potential of SPIO as an advanced binder material for high-performance lithium-ion batteries.

关键词

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