Impact of polypyrrole coating on the electrochemical properties of Li1.04Fe0.3Mn0.7PO4 cathode materials

IF 3 4区材料科学 Q3 CHEMISTRY, PHYSICAL

Solid State Ionics Pub Date : 2024-07-25 DOI:10.1016/j.ssi.2024.116648

Rui He , Xue Bai , Aijia Wei , Lijing Sun , Lihui Zhang , Guanyu Zhao , Qinglong Yuan , Jinping Mu , Xi Zhang , Zhenfa Liu

引用次数: 0

Abstract

In this work, polypyrrole (PPy) was used to modify Li_1.04Fe_0.3Mn_0.7PO₄ cathode materials and improve their conductivity. This study found that PPy could form a coating layer and conductive network on the material surface and effectively enhance the conductivity of the material as well as stability of the electrolyte interface. When the amount of PPy addition was 2%, the capacity retention rate at 0.2C and 20 °C was 98.6% after 500 cycles, and the capacity retention rate at −15 °C was 89.0% after 200 cycles. The capacity retention rate of the 2% PPy coated Li_1.04Fe_0.3Mn_0.7PO₄ sample was 20.4% higher than that of the pure Li_1.04Fe_0.3Mn_0.7PO₄ sample after 200 cycles at −15 °C.

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聚吡咯涂层对 Li1.04Fe0.3Mn0.7PO4 阴极材料电化学性能的影响

在这项研究中，聚吡咯（PPy）被用于改性锰酸锂阴极材料并提高其导电性。研究发现，PPy 能在材料表面形成涂层和导电网络，有效提高材料的导电性和电解质界面的稳定性。当 PPy 的添加量为 2% 时，在 0.2C 和 20°C 下循环 500 次后的容量保持率为 98.6%，在 -15°C 下循环 200 次后的容量保持率为 89.0%。在 -15 ℃ 下循环 200 次后，2% PPy 涂层锰酸锂样品的容量保持率比纯锰酸锂样品高 20.4%。

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

Solid State Ionics 物理-物理：凝聚态物理

CiteScore

6.10

自引率

3.10%

发文量

152

审稿时长

58 days

期刊介绍： This interdisciplinary journal is devoted to the physics, chemistry and materials science of diffusion, mass transport, and reactivity of solids. The major part of each issue is devoted to articles on: (i) physics and chemistry of defects in solids; (ii) reactions in and on solids, e.g. intercalation, corrosion, oxidation, sintering; (iii) ion transport measurements, mechanisms and theory; (iv) solid state electrochemistry; (v) ionically-electronically mixed conducting solids. Related technological applications are also included, provided their characteristics are interpreted in terms of the basic solid state properties. Review papers and relevant symposium proceedings are welcome.