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Mn–Doped Hollow Na 3 V 2 O 2 (PO 4 ) 2 F as a High Performance Cathode Material for Sodium Ion Batteries
Author(s) -
Du Peng,
Mi Kan,
Hu Fangdong,
Jiang Xiaolei,
Zheng Xiuwen
Publication year - 2021
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/ejic.202001159
Subject(s) - cathode , electrochemistry , doping , chemistry , conductivity , ion , analytical chemistry (journal) , sodium , hydrothermal circulation , electrical resistivity and conductivity , hydrothermal synthesis , sodium ion battery , chemical engineering , materials science , electrode , optoelectronics , electrical engineering , organic chemistry , chromatography , faraday efficiency , engineering
Na 3 V 2 O 2 (PO 4 ) 2 F (marked as NVOPF) is a promising cathode material for sodium‐ion batteries owing to its high voltage and theoretical energy density, while the low electrical conductivity hinders its practical applications. Ion‐doping could effectively improve electronic conductivity and structural stability of these materials. In this study, Mn‐doping Na 3 V 2− x Mn x O 2 (PO 4 ) 2 F (0≤ x ≤0.15) hollow microspheres were successfully synthesized by hydrothermal method in the presence of H 2 O 2 . Among these obtained materials, NVMOPF‐0.050 exhibits the best electrochemical performance with initial discharge capacity of 118 mAh g −1 and 61 mAh g −1 at 0.1 C and 2 C as cathode material for sodium ion batteries. Excellent performance can be attributed to the hollow spherical architecture, and good structural stability.