Ultralight and High Thermal Conductive Current Collector Derived from Polyimide for Advanced LIBs

Currently, the thermal runaway of lithium-ion batteries (LIBs) has become one of its most concerned safety hazards. Therefore, battery cells with high safety and energy density have become the important goal for the development of LIBs. In this work, the ultralight and high thermal conductivity of t...

Full description

Saved in:
Bibliographic Details
Published inACS applied energy materials Vol. 4; no. 9; pp. 9721 - 9730
Main Authors Hu, Jun-Qi, Li, Yue-Zhu, Liao, Song-Yi, Huang, Xing-Wen, Chen, Yi-Zhao, Peng, Xiao-Kang, Yang, Yi-Bin, Min, Yong-Gang
Format Journal Article
LanguageEnglish
Published American Chemical Society 27.09.2021
Subjects
surface metalation
polyimide
current collector
electrochemistry
thermal conductivity
Online AccessGet full text

Cover

More Information
Summary:Currently, the thermal runaway of lithium-ion batteries (LIBs) has become one of its most concerned safety hazards. Therefore, battery cells with high safety and energy density have become the important goal for the development of LIBs. In this work, the ultralight and high thermal conductivity of the Cu@graphene-like thermal film (shortened as Cu@GTF) composite current collector with a sandwich structure was derived from polyimide and prepared by the vacuum evaporation method. Compared with the commercial copper foil, the Cu@GTF showed a smaller areal density of <7.0 mg/cm2 (vs 17.50 mg/cm2 of commercial Cu foil) and a higher thermal conductivity of >550 mm2/s (vs 164 mm2/s of Cu foil). Considering its lighter mass, higher thermal conductivity, and reasonable electrical conductivity, the Cu@GTF as a current collector may become a favorable competitor of the commercial Cu foil to meet people’s needs for high safety, energy, and performance of LIBs.
ISSN:2574-0962
2574-0962
DOI:10.1021/acsaem.1c01814