Deciphering the lithium storage chemistry in flexible carbon fiber-based self-supportive electrodes
作者机构：College of Materials Science and EngineeringHunan Joint International Laboratory of Advanced Materials and Technology for Clean EnergyHunan UniversityChangshaPeople's Republic of China Guangxi Key Laboratory of Electrochemical Energy MaterialsSchool of Chemistry&Chemical EngineeringGuangxi UniversityNanningPeople's Republic of China Key Laboratory for Water Quality and Conservation of the Pearl River DeltaInstitute of Environmental Research at Greater BayMinistry of EducationGuangzhou UniversityGuangzhouChina
出 版 物：《Carbon Energy》 (碳能源（英文）)
年 卷 期：2022年第4卷第5期
页 面：820-832页
核心收录：
基 金：National Natural Science Foundation of China,Grant/Award Numbers:21875292,21902188 National Key Research and Development Program of China,Grant/Award Number:2019YFA0705702 Hunan Provincial Natural Science Foundation,Grant/Award Number:2021JJ30087 Natural Science Foundation of Guangdong Province,Grant/Award Number:2020A1515010798 Hunan Joint International Laboratory of Advanced Materials and Technology for Clean Energy,Grant/Award Number:2020CB1007
主 题：density functional theory flexible carbon fiber cloth lithium-ion batteries Ni5P4 self-supportive electrodes
摘 要：Flexible carbon fiber cloth(CFC)is an important scaffold and/or current collector for active materials in the development of flexible self-supportive electrode materials(SSEMs),especially in lithium-ion ***,during the intercalation of Li ions into the matrix of CFC(below 0.5 V ***/Li+),the incompatibility in the capacity of the CFC,when used directly as an anode material or as a current collector for active materials,leads to difficulty in the estimation of its actual *** address this issue,we prepared Ni_(5)P_(4)nanosheets on CFC(denoted CFC@Ni_(5)P_(4))and investigated the contribution of CFC in the CFC@Ni_(5)P_(4)by comparing to the powder Ni_(5)P_(4)nanosheets traditionally coated on a copper foil(CuF)(denoted P-Ni_(5)P_(4)).At a current density of 0.4 mA cm^(−2),the as-prepared CFC@Ni_(5)P_(4)showed an areal capacity of 7.38 mAh cm^(−2),which is significantly higher than that of the PNi_(5)P_(4)*** importantly,theoretical studies revealed that the CFC has a high Li adsorption energy that contributes to the low Li-ion diffusion energy barrier of the Ni_(5)P_(4)due to the strong interaction between the CFC and Ni_(5)P_(4),leading to the superior Li-ion storage performance of the CFC@Ni_(5)P_(4)over the pristine Ni_(5)P_(4)*** present work unveils the underlying mechanism leading to the achievement of high performance in SSEMs.
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