PVP-assisted synthesis of LiFePO4/C cathode material for Li-ion storage

IF 2.4 4区化学 Q3 CHEMISTRY, PHYSICAL

Ionics Pub Date : 2025-01-12 DOI:10.1007/s11581-024-06055-6

A. Movahedian, S. M. Masoudpanah, A. Sarmadi, M. Hasheminiasari

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引用次数: 0

Abstract

In this study, a solution combustion synthesis method was employed using polyvinylpyrrolidone (PVP) as fuel to prepare LiFePO₄ (LFP) powders. The effects of PVP contents on the structural, microstructural, and electrochemical properties were investigated by various characterization methods. The as-combusted powders were calcined at 750 °C for 6 h under an Ar-5% H₂ atmosphere, resulting in the well-crystalline LiFePO₄ powders without any impurity α-Fe₂O₃ and Fe₂P phases. The LFP powders were composed of large spherical LiFePO₄ particles (1 \(\mu\)m) in which the specific surface area and pore size were dependent on the PVP fuel content. The LFP powders prepared by a mass ratio of PVP to metal nitrate of 3 had the highest specific surface area of 328 m² g⁻¹, leading to excellent cycling performance such as a stable coulombic efficiency of 100% and a high capacity retention of 92% (from 84 to 78 mAh g⁻¹) for 500 charge/discharge cycles at a current rate of 1C.

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来源期刊

Ionics 化学-电化学

CiteScore

5.30

自引率

7.10%

发文量

427

审稿时长

2.2 months

期刊介绍： Ionics is publishing original results in the fields of science and technology of ionic motion. This includes theoretical, experimental and practical work on electrolytes, electrode, ionic/electronic interfaces, ionic transport aspects of corrosion, galvanic cells, e.g. for thermodynamic and kinetic studies, batteries, fuel cells, sensors and electrochromics. Fast solid ionic conductors are presently providing new opportunities in view of several advantages, in addition to conventional liquid electrolytes.