Energy Storage Science and Technology ›› 2024, Vol. 13 ›› Issue (3): 749-758.doi: 10.19799/j.cnki.2095-4239.2023.0763

• Energy Storage Materials and Devices • Previous Articles     Next Articles

Characteristics and preparation of metallized plastic current collectors for lithium-ion batteries

Zhiguo ZHANG1(), Huaqing LI2, Li WANG1(), Xiangming HE1   

  1. 1.Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing 100084, China
    2.Jiangsu HanYe New Material Institute Co. , Ltd, Suzhou 215234, Jiangsu, China
  • Received:2023-10-24 Revised:2023-11-22 Online:2024-03-28 Published:2024-03-28
  • Contact: Li WANG E-mail:zhangzg@qsinghua.edu.cn;wang-l@tsinghua.edu.cn

Abstract:

Metallized plastic current collectors (MPCCs) have attracted considerable attention from industrial researchers as MPCCs can considerably increase the energy density of batteries by reducing the thickness and weight of devices. Furthermore, polymer properties, such as insulation, heat shrinkage, and melting considerably increase battery safety. Understanding the properties and preparation methods of polymer substrates and MPCCs is crucial for the development of high-quality MPCCs and the promotion of the development of high energy density and high-safety batteries. Therefore, this review focused on the properties of commonly used and potential polymers and clarified the advantages of high-quality polyethylene terephthalate (PET)-and polypropylene (PP)-based MPCCs applied to lithium-ion batteries as well as their fabrication and operational challenges, including the dissolution reaction of PET, low adhesion between PP, and metal layers. We have proposed measures to overcome these drawbacks. This paper summarizes the principles, advantages, disadvantages, and strategies (magnetron sputtering, evaporation, chemical deposition and electrochemical deposition, etc.) for depositing metal layers on polymer surfaces to improve the homogeneity, consistency, and electrical conductivity of the metal layers on polymer surfaces. Finally, to improve MPCC availability in batteries, the directions of developing MPCC, including improving the metal-polymer interfacial bonding, safety, and conductivity of batteries, as well as functionalizing and refining MPCC elaborated.

Key words: lithium-ion battery, composite current collector, plastic film, metal coating

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