高安全性PEO-Al2O3复合隔膜的制备及电化学性能

doi:10.11896/cldb.18080116

材料导报

2019, Vol. 33

Issue (20): 3512-3519 https://doi.org/10.11896/cldb.18080116

高分子与聚合物基复合材料

高安全性PEO-Al₂O₃复合隔膜的制备及电化学性能

张文魁¹, 王佳¹, 李姣姣¹, 周晓政², 叶张军², 黄辉¹, 甘永平¹, 夏阳¹

1 浙江工业大学材料科学与工程学院,杭州 310014
2 浙江谷神能源科技股份有限公司,杭州 311245

Synthesis and Electrochemical Performance of PEO-Al₂O₃ Hybrid Membrane for High Safety Lithium-ion Batteries

ZHANG Wenkui¹, WANG Jia¹, LI Jiaojiao¹, ZHOU Xiaozheng², YE Zhangjun², HUANG Hui¹, GAN Yongping¹, XIA Yang¹

1 College of Materials Science and Engineering, Zhejiang University of Technology, Hangzhou 310014
2 Zhejiang Godsend Power Technology Co., Ltd, Hangzhou 311245

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摘要本工作以聚氧化乙烯(PEO)和氧化铝(Al₂O₃)为原料,利用刮涂法制备了一系列PEO-Al₂O₃复合隔膜,探索了Al₂O₃添加量对PEO-Al₂O₃复合隔膜的性能影响。采用扫描电子显微镜(SEM)、透射电子显微镜(TEM)、X射线能量色散谱仪(EDS)、X射线衍射仪(XRD)、红外光谱(FTIR)、X射线光电子能谱分析(XPS)、热重分析(TG)及燃烧实验法对复合隔膜的形貌、元素分布、相组成、表面化学状态和热稳定性进行表征。通过线性扫描伏安法(LSV)、电化学交流阻抗法(EIS)、孔隙率测试和吸液率实验考察了复合隔膜的电化学窗口、离子电导率、孔隙率和吸液率。实验结果显示,PEO-Al₂O₃-90复合隔膜具有最高的离子电导率(1.21×10^-3 S/cm)、最大的吸液率(260%)、较好的热稳定性、较高的孔隙率(47%)以及较宽的电化学窗口(0~4.8 V)。通过组装电池发现,PEO-Al₂O₃-90复合隔膜电池在电流密度为0.1C时表现出较高的放电比容量、优异的循环稳定性以及较强的安全性。

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	张文魁
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	叶张军
	黄辉
	甘永平
	夏阳

关键词: 聚氧化乙烯氧化铝隔膜离子电导率阻燃性锂离子电池

Abstract: In this work, a series of polyethylene glycol oxide (PEO)-aluminium oxide (Al₂O₃) hybrid membranes were prepared by a slurry coating method. The effect of the mass ratio of PEO/Al₂O₃on the performance of PEO-Al₂O₃ hybrid membranes was systematically investigated. Scanning electron microscopy (SEM), transmission electron microscope (TEM), X-ray energy dispersive spectroscopy (EDS), X-ray diffraction (XRD), Fourier transform infrared spectra (FTIR), X-ray photoelectron spectroscopy (XPS), thermogravimetric analysis (TG) and combustion test were performed to reveal the morphology, element distribution, phase composition, surface chemical state and thermal stability of PEO-Al₂O₃ hybrid membranes. In addition, linear sweep voltammetry (LSV), electrochemical impedance spectroscopy (EIS), porosity and electrolyte uptake test were employed to investigate the electrochemical stability, ionic conductivity, porosity and electrolyte uptake of PEO-Al₂O₃ hybrid membranes. The results showed that PEO-Al₂O₃-90 hybrid membrane had a high ionic conductivity (1.21×10^-3 S/cm), high electrolyte uptake (260%), good thermal stability, high porosity (47%) and wide electrochemical stabilization window (0—4.8 V). At the current density of 0.1C, LiFePO₄|PEO-Al₂O₃-90|Li cells assembled with PEO-Al₂O₃-90 hybrid membrane exhibited a high discharge specific capacity, superior cycling stability and enhanced safety.

Key words: polyethylene glycol oxide aluminum oxide hybrid membrane ionic conductivity flammability lithium-ion battery

出版日期: 2019-10-25 发布日期: 2019-08-29

ZTFLH:

TQ152

基金资助: 国家自然科学基金(21403196;51572240;51677170;51777194);浙江省自然科学基金(LY16E070004;LY17E020010)

作者简介: 张文魁,浙江工业大学教授,博士研究生导师,于1997年在浙江大学材料系获得材料科学与工程专业工学博士学位。在国内外学术期刊上发表论文200余篇,申请国家发明专利80余项,其中授权31项。其团队主要研究方向包括:先进二次电池技术及能源储存和转化材料,如锂离子电池,锂硫电池,燃料电池和超级电容器。负责完成科研项目20多项,包括国家“863”计划专项,国家自然科学基金项目等,获省级科技进步奖二等奖一项。已培养出博士10余名、硕士50余名,本科生百余名。夏阳,浙江工业大学副教授,硕士研究生导师。2013年博士毕业于浙江工业大学材料科学与工程学院,留校至今。其中2017年到美国得克萨斯州立大学奥斯汀分校Arumugam Manthiram课题组访问交流学习。在国内外学术期刊上发表论文100余篇,申请国家发明专利48项,其中授权18项。其主要研究方向为生物质碳基储能材料及其在锂离子电池、锂硫电池和超级电容器中的应用。主持和承担了科研项目10多项,包括国家自然科学基金和浙江省自然科学基金等,获浙江省科技进步奖二等奖一项,已培养出博士5名、硕士10余名,本科生20余名。nanoshine@zjut.edu.cn

引用本文:

张文魁, 王佳, 李姣姣, 周晓政, 叶张军, 黄辉, 甘永平, 夏阳. 高安全性PEO-Al₂O₃复合隔膜的制备及电化学性能[J]. 材料导报, 2019, 33(20): 3512-3519.
ZHANG Wenkui, WANG Jia, LI Jiaojiao, ZHOU Xiaozheng, YE Zhangjun, HUANG Hui, GAN Yongping, XIA Yang. Synthesis and Electrochemical Performance of PEO-Al₂O₃ Hybrid Membrane for High Safety Lithium-ion Batteries. Materials Reports, 2019, 33(20): 3512-3519.

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http://www.mater-rep.com/CN/10.11896/cldb.18080116 或 http://www.mater-rep.com/CN/Y2019/V33/I20/3512

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