基于 PAN 原位无机反应的高 LFP 负载自支撑柔性正极材料研究

IF 2.7 4区材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Letters Pub Date : 2024-10-24 DOI:10.1016/j.matlet.2024.137615

Wenjin Song, Tianyan Yang, Xianxian Shi, Wei Xie, Peitao Xiao, Di Lu, Yufang Chen

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引用次数: 0

摘要

高负载柔性电极材料是柔性电池的关键组成部分。本文利用电纺丝技术制备了一种柔性电极，该电极无需粘合剂和集流器即可实现高导电性和自支撑性。这种结构优势得益于 PAN（聚丙烯腈）和 LFP/CNF 的高度相容性和纤维化，通过前驱体转化方法将其就地转化为以连续碳纤维/CNF 为导电相、以 LFP（LiFePO4）为储锂相的柔性自支撑复合电极。这些柔性材料在 0.1C 时的比容量为 110.5 mAh/g，0.5C 时为 92 mAh/g，3C 时为 58 mAh/g，并在机械弯曲后实现了可逆充放电循环。这些发现凸显了 LFP/CNF 电极在柔性和高性能储能应用方面的潜力。

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Research on self-supporting flexible cathode materials with high LFP loading based on PAN in situ inorganic reaction

High loading flexible electrode material is a key component of flexible batteries. This article prepares a flexible electrode by using electrospinning technology that achieves high conductivity and self-supporting without adhesive and current collector. This structural advantage is attributed to the high compatibility and fibrosis of PAN (polyacrylonitrile) and LFP/CNF, which is transformed in situ by precursor conversion method into a flexible self-supporting composite electrode with continuous carbon fiber/CNF as the conductive phase and LFP(LiFePO₄) as the lithium storage phase. These flexible materials achieving a specific capacity of 110.5 mAh/g at 0.1C, 92 mAh/g at 0.5C, and 58 mAh/g at 3C, further demonstrated reversible charge and discharge cycles after mechanical bending. These findings highlight the potential of LFP/CNF electrodes for flexible and high-performance energy storage applications.

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来源期刊

Materials Letters 工程技术-材料科学：综合

CiteScore

5.60

自引率

3.30%

发文量

1948

审稿时长

50 days

期刊介绍： Materials Letters has an open access mirror journal Materials Letters: X, sharing the same aims and scope, editorial team, submission system and rigorous peer review. Materials Letters is dedicated to publishing novel, cutting edge reports of broad interest to the materials community. The journal provides a forum for materials scientists and engineers, physicists, and chemists to rapidly communicate on the most important topics in the field of materials. Contributions include, but are not limited to, a variety of topics such as: • Materials - Metals and alloys, amorphous solids, ceramics, composites, polymers, semiconductors • Applications - Structural, opto-electronic, magnetic, medical, MEMS, sensors, smart • Characterization - Analytical, microscopy, scanning probes, nanoscopic, optical, electrical, magnetic, acoustic, spectroscopic, diffraction • Novel Materials - Micro and nanostructures (nanowires, nanotubes, nanoparticles), nanocomposites, thin films, superlattices, quantum dots. • Processing - Crystal growth, thin film processing, sol-gel processing, mechanical processing, assembly, nanocrystalline processing. • Properties - Mechanical, magnetic, optical, electrical, ferroelectric, thermal, interfacial, transport, thermodynamic • Synthesis - Quenching, solid state, solidification, solution synthesis, vapor deposition, high pressure, explosive