文献类型：期刊文献

英文题名：Experimental and analytical investigation of the potential of carbon fibres for use in multifunctional batteries

作者：Fu, Yu[1];Gan, Qi[2]

机构：[1]Tongji Univ, Sch Aerosp Engn & Appl Mech, Zhangwu Rd 100, Shanghai 200092, Peoples R China;[2]East China Univ Sci & Technol, Frontiers Sci Ctr Materiobiol & Dynam Chem, Key Lab Ultrafine Mat, Minist Educ, Shanghai 200237, Peoples R China

年份：2023

卷号：27

期号：2

起止页码：345

外文期刊名：JOURNAL OF SOLID STATE ELECTROCHEMISTRY

收录：;EI(收录号：20224613106632);WOS:【SCI-EXPANDED(收录号:WOS:000881536000002)】；

基金：This work was financially supported by Tongji University (Project No. 13302150046 and 13302350056), the National Natural Science Foundation of China (No. 32071337). This work is also sponsored by the Young Elite Scientists Sponsorship Program of the Chinese Association of Science and Technology (2021QNRC001) and Shanghai Pujiang Program (20PJ1402600).

语种：英文

外文关键词：Carbon fibre; Lithium-ion batteries; Electrochemical properties; Lithiation kinetics

摘要：Carbon fibres have been extensively investigated for their promising potential as anodes or current collectors in next-generation integrated batteries. However, the exact reasons for the distinct lithium-ion battery (LIB) performance of different carbon fibres remain largely unknown. In this work, we explored the morphology-/microstructure-mediated lithiation mechanism in carbon fibre anodes and found that a pitch-based carbon fibre with the highest crystal-ordering degree exhibited higher cycling stability but lower reversible capacity and rate capability than a polyacrylonitrile-based carbon fibre (PAN) with the lowest crystal-ordering degree; a modified PAN carbon fibre with a slightly higher crystal ordering degree than PAN showed the highest cycling stability and rate capability. Such carbon-fibre-dependent lithiation is attributable to the distinct lithiation kinetics intrinsic to carbon fibres with different microstructures. This study reveals the morphology-/microstructure-dependent lithiation mechanism of carbon fibres and provides important insights into the interplay between their lithiation kinetics, microstructure and lithium storage performance. Carbon fibres' adequate crystal degree, small diameter and high structural integrity collectively account for their superior electrochemical properties. This provides guidelines for the design of carbon fibre electrodes and other carbonaceous electrodes for use in next-generation LIBs.