Mechanistic understanding of the charge storage processes in FeF_(2) aggregates assembled with cylindrical nanoparticles as a cathode material for lithium-ion batteries by in situ magnetometry
作者机构：Center for Marine Observation and CommunicationsCollege of PhysicsQingdao UniversityQingdaoShandongChina College of Electrical Engineering and AutomationShandong University of Science and TechnologyQingdaoShandongChina State Key Laboratory of Crystal MaterialsSchool of PhysicsShandong UniversityJinanShandongChina
出 版 物：《Carbon Energy》 (碳能源（英文）)
年 卷 期：2022年第4卷第6期
页 面：1011-1020页
核心收录：
基 金：National Natural Science Foundation of China Grant/Award Number:51804173
主 题：charge storage mechanism FeF_(2)cathode materials in situ magnetometry lithium-ion batteries
摘 要：Transition metal fluorides(TMFs)cathode materials have shown extraordinary promises for electrochemical energy storage,but the understanding of their electrochemical reaction mechanisms is still a matter of debate due to the complicated and continuous changing in the battery internal ***,we design a novel iron fluoride(FeF_(2))aggregate assembled with cylindrical nanoparticles as cathode material to build FeF_(2) lithium-ion batteries(LIBs)and employ advanced in situ magnetometry to detect their intrinsic electronic structure during cycling in real *** results show that FeF_(2) cannot be involved in complete conversion reactions when the FeF_(2) LIBs operate between the conventional voltage range of 1.0–4.0 V,and that the corresponding conversion ratio of FeF_(2) can be further ***,we first demonstrate that the spin-polarized surface capacitance exists in the FeF_(2) cathode by monitoring the magnetic responses over various voltage *** research presents an original and insightful method to examine the conversion mechanism of TMFs and significantly provides an important reference for the future artificial design of energy systems based on spinpolarized surface capacitance.
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