一种具有正交结构的新材料Na0.45VOPO4•1.58H2O应用于钠离子电池正极材料

2021 9th International Renewable and Sustainable Energy Conference (IRSEC) Pub Date : 2021-11-23 DOI:10.1109/IRSEC53969.2021.9741139

A. Kafih, Abdelwahed Chari, J. Alami, M. Dahbi, A. Guessous

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引用次数: 0

摘要

采用正交结构的新材料Na0.45VOPO4•1.58H2O作为钠离子电池正极材料。本文采用循环伏安法、恒流充放电法和长周期法研究了钒基离子在磷酸介质中电化学氧化成功合成的这种材料的电化学性能。在2.5 ~ 3.8 V(相对于Na+/ Na)范围内，在0.1 C下可获得~ 90 mAh g - 1的可逆容量，具有3.4 V的高平均电位和良好的可循环性(20次循环后的初始库仑效率> 97%)。

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A New Material Na0.45VOPO4•1.58H2O with an Orthorhombic Structure is Applied as Cathode Material for Sodium-ion Batteries

A new material Na0.45VOPO4•1.58H2O with an orthorhombic structure is applied as cathode material for sodiumion batteries. In this paper, the electrochemical properties of this material which has been successfully synthesized by electrochemical oxidation of vanadyl ions in a phosphoric acid medium have been investigated using cyclic voltammetry, galvanostatic charge-discharge, and a long cycle term. A reversible capacity of ~ 90 mAh g - 1 at 0.1 C was determined between 2.5 and 3.8 V (versus Na+/ Na) with a high average potential of 3.4 V and good cyclability (initial Coulomb efficiency > 97% after 20 cycles).

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2021 9th International Renewable and Sustainable Energy Conference (IRSEC)

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