A review of current collectors for lithium-ion batteries

Research output: Contribution to journalReview articlepeer-review

Authors

  • Pengcheng Zhu
  • Jean Marshall
  • Vannessa Goodship

Colleges, School and Institutes

Abstract

Lithium-ion batteries are the state-of-the-art power source for most consumer electronic devices. Current collectors are indispensable components bridging lithium-ion batteries and external circuits, greatly influencing the capacity, rate capability and long-term stability of lithium-ion batteries. Conventional current collectors, Al and Cu foils have been used since the first commercial lithium-ion battery, and over the past two decades, the thickness of these current collectors has decreased in order to increase the energy density. However to improve the performance further, alternative materials and structures, as well as specific treatments such as etching and carbon coating, have also been investigated to enhance the electrochemical stability and electrical conductivity of current collectors, for next-generation lithium-ion batteries with higher capacities and longer service lifetime. This work reviews six types of materials for current collectors, including Al, Cu, Ni, Ti, stainless steel and carbonaceous materials, and compares these materials from five aspects of electrochemical stability, electrical conductivity, mechanical property, density and sustainability. The effects of three different structures of foil, mesh and foam as well as two treatments of chemical etching and coating are also discussed. Future opportunities are highlighted at the end of this review.

Bibliographic note

Funding Information: This research was funded by the Faraday Institution ; ReLiB fast-start project (grant numbers FIRG005 and FIRG006 ), the Innovate UK though the Faraday Challenge; R2LIB, TS/S004572/1 .

Details

Original languageEnglish
Article number229321
JournalJournal of Power Sources
Volume485
Early online date13 Dec 2020
Publication statusPublished - 15 Feb 2021