Copper-coated Porous Polyimide as Ultralight and Safe Current Collectors for Advanced LIBs

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外文摘要：Metallic copper is widely used as current collector(CC)for graphite anode of lithium-ion batteries(LIBs)due to its high electrical con-ductivity and electrochemical stability.However,the large volume density of commercial copper foil(～8.9 g·cm-3)limits the increase of energy density of battery.Here,copper-coated porous polyimide(Cu@PPI)was prepared by vacuum evaporation as collector for the graphite anode.The sandwich structure connects the copper metal on both sides of the collector with excellent electrical conductivity.Compared to commercial Cu foil,Cu@PPI has lighter mass(≤3.9 mg for disc of 12 mm diameter versus 9.9 mg of～10 μm Cu foil)and lower volume density(≤3.3 g·cm-3).In ad-dition,the porous structure allows of better adhesion of reactive substances and electrochemical properties than pure Cu foils.It is estimated that the energy density of Cu@PPI should be much higher than that of Cu foil.This strategy should be applicable for other current collectors.

外文关键词：

Copper-coatedVacuum evaporationPorous polyimide(PPI)Current collector(CC)LIBs

作者：

Cun-Sheng Liu、Jun-Qi Hu、Ting-Ting Mao、Song-Yi Liao、Ru-Ming Feng、Yi-Dong Liu、Yong-Gang Min

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作者单位：

School of Materials and Energy,Guangdong University of Technology,Guangzhou 510006,China

College of Chemistry and Chemical Engineering,Zhongkai University of Agriculture and Engineering,Guangzhou 510225,China

Shanwei Branch of Advanced Energy Science and Technology Guangdong Laboratory,Shanwei 516600,China

基金：

Foshan Science and Technology Innovation Team(2019)Guangdong Basic and Applied Basic Research Foundation广州市科技计划Science and Technology Major Project of Guangdong Province国家重点研发计划

项目编号：

19200010001082021A15151111032022010108672201101658512342020YFB0408100

出版年：

2024

DOI：

10.1007/s10118-023-3062-8

高分子科学(英文版)

中国化学会　中国科学院化学研究所

高分子科学(英文版)

CSTPCD

影响因子：0.721

ISSN：0256-7679

年,卷(期)：2024.42(4)