K-doped Li2FeTiO4 cathode with enhanced structural stability for lithium-ion batteries

IF 2.6 4区化学 Q3 ELECTROCHEMISTRY

Journal of Solid State Electrochemistry Pub Date : 2025-04-16 DOI:10.1007/s10008-025-06320-2

Peng-qing Hou, Yingdong Qu, Rui Huang, Xinru Tian, Guanglong Li, Shaohua Luo

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引用次数: 0

Abstract

Li₂FeTiO₄ cathode has emerged as a promising option for lithium-ion batteries because of its outstanding capacity and eco-friendly properties. However the abominable conductivity and ion transports hindered its electrochemical performance. In this work, (Li_1-xK_x)₂FeTiO₄ (LiFT-Kx, x = 0 and 0.01) cathode materials with were successfully synthesized. Remarkably, there was a notable improvement in the properties of interlayer spacing, ionic conductivity and kinetics. As a result, LiFT-K0.01 cathode expressed splendid initial capacitance (108.8 mAh g⁻¹, 0.05 C), stability (82.9% over 30 cycles), and rate performance (89.8 mAh g⁻¹, 82.4% of the original values). This work might provide valuable insights for the exploration of lithium storage with excellent long-term stability, and it might open new possibilities for the development of advanced energy storage technologies based on lithium-ion batteries.

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增强结构稳定性的k掺杂Li2FeTiO4锂离子电池阴极

Li2FeTiO4阴极由于其出色的容量和环保特性而成为锂离子电池的一种有前途的选择。但其电导率和离子输运性差，影响了其电化学性能。本文成功合成了（Li1-xKx）2FeTiO4 （LiFT-Kx, x = 0和0.01）正极材料。值得注意的是，在层间距、离子电导率和动力学性能方面有了显著的改善。结果表明，LiFT-K0.01阴极具有良好的初始电容（108.8 mAh g−1,0.05 C）、稳定性（30次循环后82.9%）和倍率性能（89.8 mAh g−1，为原始值的82.4%）。这项工作可能为探索具有优异长期稳定性的锂存储提供有价值的见解，并可能为基于锂离子电池的先进储能技术的发展开辟新的可能性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of Solid State Electrochemistry 工程技术-电化学

CiteScore

4.80

自引率

4.00%

发文量

227

审稿时长

4.1 months

期刊介绍： The Journal of Solid State Electrochemistry is devoted to all aspects of solid-state chemistry and solid-state physics in electrochemistry. The Journal of Solid State Electrochemistry publishes papers on all aspects of electrochemistry of solid compounds, including experimental and theoretical, basic and applied work. It equally publishes papers on the thermodynamics and kinetics of electrochemical reactions if at least one actively participating phase is solid. Also of interest are articles on the transport of ions and electrons in solids whenever these processes are relevant to electrochemical reactions and on the use of solid-state electrochemical reactions in the analysis of solids and their surfaces. The journal covers solid-state electrochemistry and focusses on the following fields: mechanisms of solid-state electrochemical reactions, semiconductor electrochemistry, electrochemical batteries, accumulators and fuel cells, electrochemical mineral leaching, galvanic metal plating, electrochemical potential memory devices, solid-state electrochemical sensors, ion and electron transport in solid materials and polymers, electrocatalysis, photoelectrochemistry, corrosion of solid materials, solid-state electroanalysis, electrochemical machining of materials, electrochromism and electrochromic devices, new electrochemical solid-state synthesis. The Journal of Solid State Electrochemistry makes the professional in research and industry aware of this swift progress and its importance for future developments and success in the above-mentioned fields.