Manipulation of Na3V2（PO4）2F3 via aluminum doping to alter local electron states toward an advanced cathode for sodiumion batteries（英文）
作者机构：International Joint Research Center for Advanced Energy Materials of Yunnan Province Yunnan Key Laboratory of Carbon Neutrality and Green Low-Carbon Technologies School of Materials and Energy Yunnan University College of Environmental and Chemical Engineering Metallurgy College R & D Center Yunnan Yuntianhua Co. Ltd International Joint Research Center for Advanced Energy Materials of Yunnan Province Yunnan Key Laboratory of Carbon Neutrality and Green Low-Carbon Technologies School of Materials and EnergySouthwest United Graduate School Yunnan University
出 版 物：《Rare Metals》 (稀有金属(英文版))
年 卷 期：2024年第43卷第9期
页 面：4253-4262页
核心收录：
学科分类：0808[工学-电气工程] 0806[工学-冶金工程] 0817[工学-化学工程与技术] 08[工学] 0703[理学-化学] 0702[理学-物理学]
基 金：supported by the National Natural Science Foundation of China (Nos.52064049 and52372232) the Major Science and Technology Projects of Yunnan Province (No.202302AB080019-3) the National Natural Science Foundation of Yunnan Province (Nos.202301AS070040 and202301AU070209) the Scientific Research Fund Project of Yunnan Provincial Department of Education (No.2023J0033)
主 题：Cathode Doping Electrochemistry NASICON Sodium-ion energy storage batteries
摘 要：With its unique 3D skeleton structure and exceptional cyclic stability,the Na+superionic conducto（NASICON）-type Na3V2（PO4）2F3（NVPF） has been con sidered as a competitive cathode material for advanced Na ion ***,the release of fluorine during th heat treatment leads to the formation of an additional phas Na3V2（PO4）3（NVP）,which results in a low-voltage plateau and compromises the energy ***,we modulat the local electronic states of the V site by aluminum sub stitution to strengthen the stability of *** results confirm that the aluminum introduction not only changes the loca electron states of V sites,significantly reducing the for mation of NVP by-product from 6.71 wt% to 1.01 wt% but also effectively reduces the band gap,improving th electronic conductivity of *** optimized Na3V1.9Al0.1（PO4）2F3exhibits higher energy density of 340 Wh·kg-1and excellent rate performance of 106.7 mAh·g-1at 10C compared with the pristine cathode.
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