隔膜陶瓷涂层对磷酸铁锂电池性能的影响研究

doi:10.3969/j.issn.1008-0198.2026.04.019

湖南电力 ›› 2026, Vol. 46 ›› Issue (4): 144-151.doi: 10.3969/j.issn.1008-0198.2026.04.019

隔膜陶瓷涂层对磷酸铁锂电池性能的影响研究

刘晶菊^1,2, 王江峰^1,2, 陈扩^1,2, 陈罗甲^1,2, 陈宝辉^1,2

1.电网防灾减灾全国重点实验室,湖南长沙 410129;
2.国网湖南省电力有限公司防灾减灾中心,湖南长沙 410129

收稿日期:2025-12-11 修回日期:2026-01-06 出版日期:2026-08-25 发布日期:2026-09-11
通信作者: 刘晶菊（1991）,女,博士,副高级工程师,主要研究方向为安全储能锂电池技术。
作者简介:王江峰（1995）,男,硕士,中级工程师,主要研究方向为高性能储能锂电池制备。陈扩（1995）,男,硕士,中级工程师,主要研究方向为高安全储能锂电池制备。陈罗甲（1998）,男,硕士,中级工程师,主要研究方向为高性能储能锂电池制备。陈宝辉（1987）,男,博士,高级工程师,主要研究方向为高安全高能效储能电池开发。
基金资助:
国家电网有限公司科技项目（4000-202323747A-3-4-SY）

Differential Impacts of Ceramic Coatings on Separators for Lithium Iron Phosphate Battery Performance

LIU Jingju^1,2, WANG Jiangfeng^1,2, CHEN Kuo^1,2, CHEN Luojia^1,2, CHEN Baohui^1,2

1. State Key Laboratory of Disaster Prevention & Reduction for Power Grid, Changsha 410129, China;
2. State Grid Hunan Electric Company Limited Disaster Prevention and Reduction Center, Changsha 410129, China

Received:2025-12-11 Revised:2026-01-06 Online:2026-08-25 Published:2026-09-11

摘要/Abstract

摘要： 基于280 A·h方形铝壳磷酸铁锂电池体系,系统对比氧化铝涂覆隔膜和勃姆石涂覆隔膜对电池性能的影响。研究发现：氧化铝涂覆隔膜电池循环423周后,放电能量保持率和能量效率分别较勃姆石涂覆隔膜电池提升0.87个百分点和0.39个百分点;在过充、外部加热、针刺三类滥用测试中,氧化铝涂覆隔膜电池安全阀开启、电压突降及热失控触发时间分别较勃姆石涂覆隔膜电池延迟1.9~131 s、1.3~1.8 min、0.26~2.04 min,热失控触发温度提高2~7.7 ℃,这些性能优势主要归因于氧化铝涂层具有更优的离子电导率、更高的电化学稳定性及,以更强的机械与热性能。研究结果为高安全、长寿命需求的磷酸铁锂电池（如储能系统）隔膜选型及电池性能优化提供了关键数据支撑。

关键词: 锂离子电池, 隔膜, 陶瓷涂层, 安全性, 电化学性能

Abstract: This study systematically compares the effects of aluminum oxide-coated separator and boehmite-coated separator on the performance of 280 A·h prismatic aluminum-shell lithium iron phosphate batteries. The results show that after 423 cycles, the discharge energy retention rate and energy efficiency of the battery are improved by 0.87 percentage points and 0.39 percentage points, respectively compared to the boehmite-coated separator battery. In three types of abuse tests such as namely overcharging, external heating, and needle puncture, the safety valve opening time, voltage drop time, and thermal runaway triggering time of the 9AS battery are delayed by 1.9~131 min, 1.3~1.8 min, and 0.26~2.04 min, respectively compared to the boehmite-coated diaphragm battery, and the thermal runaway triggering temperature was increased by 2~7.7 ℃. These performance advantages are mainly attributed to the superior ion conductivity, higher electrochemical stability, and stronger mechanical and thermal properties of alumina coatings. This study provides critical data support for the selection of separators and performance optimization of lithium iron phosphate batteries, particularly for applications with high safety and long life requirements such as energy storage systems.

Key words: lithium-ion battery, separator, ceramic coating, safety, electrochemical performance

中图分类号:

TM911

刘晶菊, 王江峰, 陈扩, 陈罗甲, 陈宝辉. 隔膜陶瓷涂层对磷酸铁锂电池性能的影响研究[J]. 湖南电力, 2026, 46(4): 144-151.

LIU Jingju, WANG Jiangfeng, CHEN Kuo, CHEN Luojia, CHEN Baohui. Differential Impacts of Ceramic Coatings on Separators for Lithium Iron Phosphate Battery Performance[J]. Hunan Electric Power, 2026, 46(4): 144-151.

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隔膜陶瓷涂层对磷酸铁锂电池性能的影响研究

Differential Impacts of Ceramic Coatings on Separators for Lithium Iron Phosphate Battery Performance

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