Al2O3/P2O5摩尔比对动力锂电池封接玻璃结构与性能的影响

doi:10.15541/jim20250283

无机材料学报

• 研究论文 • 上一篇

Al₂O₃/P₂O₅摩尔比对动力锂电池封接玻璃结构与性能的影响

王巍巍^1,2, 曹欣¹, 刘俊飞¹, 杨小菲³, 韩娜¹, 李幸聪¹, 石丽芬¹

1.中建材玻璃新材料研究院集团有限公司先进玻璃材料全国重点实验室, 蚌埠 233000;
2.武汉理工大学材料科学与工程学院, 武汉 433070;
3.安徽凯盛基础材料科技有限公司, 蚌埠 233000

收稿日期:2025-07-06 修回日期:2025-10-28
通讯作者: 石丽芬, 教授级高级工程师. E-mail: slf@ctiec.net
作者简介:王巍巍(1988-), 男, 博士研究生. E-mail: wangweiwei@ctiec.net
基金资助:
国家重点研发计划(2021YFB3501103); 安徽省自然科学基金(2408085ME138); 安徽省重点研究与开发计划(2022a05020026)

Effect of Al₂O₃/P₂O₅ Molar Ratio on Structure and Properties of Sealing Glass for Power Lithium Batteries

WANG Weiwei^1,2, CAO Xin¹, LIU Junfei¹, YANG Xiaofei³, HAN Na¹, LI Xingcong¹, SHI Lifen¹

1. State Key Laboratory of Advanced Glass Materials, CNBM Research Institute for Advanced Glass Materials Group Co.,Ltd, Bengbu 233000, China;
2. School of Materials Science and Engineering, Wuhan University of Technology, Wuhan 430070, China;
3. Anhui Triumph Basic Material Technology Co.Ltd, Bengbu 233000, China

Received:2025-07-06 Revised:2025-10-28
Contact: SHI Lifen, professor. E-mail: slf@ctiec.net
About author:WANG Weiwei (1988-), male, PhD candidate. E-mail: wangweiwei@ctiec.net
Supported by:
National Key R&D Program of China (2021YFB3501103); Natural Science Foundation of Anhui Province (2408085ME138); Anhui Provincial Key R&D Program (2022a05020026)

摘要/Abstract

摘要： 磷酸盐玻璃以其热膨胀系数高、封接温度低特点而成为玻璃密封领域的研究热点,但在动力锂电池封接领域的研究并不多见。针对动力锂电池封接玻璃的性能需求,本研究制备了P₂O₅-Al₂O₃-B₂O₃-R₂O-NaF系高热膨胀系数玻璃,表征了Al₂O₃/P₂O₅摩尔比对封接玻璃结构、热学性能、封接性能及化学稳定性的影响。结果表明：随着Al₂O₃/P₂O₅摩尔比由0.35增大至0.76,玻璃结构中P-O-P桥氧键数量逐渐减少,[AlO₄]四面体含量先增加后减少,导致磷酸盐玻璃网络结构紧密度先增大后降低,耐酸性随之变化。而玻璃热膨胀系数先由164.5×10^-7 ℃^-1降至160×10^-7 ℃^-1,再逐渐升高至175.9×10^-7 ℃^-1,封接温度先升高至588 ℃后又降至549 ℃,先增强后减弱。本研究制备的磷酸盐封接玻璃兼顾了高热膨胀系数、低封接温度与良好的化学稳定性,为寻求动力锂电池电极的玻璃低温封接工艺提供理论与技术支撑。

关键词: 动力锂电池, 磷酸盐玻璃, 高热膨胀系数, 封接温度, 耐酸性

Abstract: This study presents a new kind of sealing glass based on P₂O₅-Al₂O₃-B₂O₃-R₂O-NaF system, which exhibits a high thermal expansion coefficient (CTE) suitable for sealing power lithium batteries. The effects of Al₂O₃/P₂O₅ molar ratio on the structure, thermal properties, sealing performance and chemical stability of the sealing glass were characterized. The results show that as the Al₂O₃/P₂O₅ molar ratio increases from 0.35 to 0.76, the number of P-O-P bridge oxygen bonds within the glass structure gradually decreases, and the content of [AlO₄] tetrahedra climbs up and then declines, leading to an initial increase in the compactness of the phosphate glass network structure, followed by a decrease. Correspondingly, the CTE of the glass first decreases from 164.5×10^-7 ℃^-1 to 160×10^-7 ℃^-1, and then gradually increases to 175.9×10^-7 ℃^-1, while the sealing temperature initially rises to 588 ℃ and subsequently falls to 549 ℃. The acid resistance of the glass also follows this trend, initially improving and then deteriorating. The phosphate sealing glass prepared in this study display proper balance among high CTE, low sealing temperature and excellent chemical stability, providing theoretical and technical support for the development of a low-temperature sealing process for the electrodes of power lithium batteries.

Key words: power lithium battery, phosphate glass, high thermal expansion coefficient, sealing temperature, acid resistance

中图分类号:

TQ171

王巍巍, 曹欣, 刘俊飞, 杨小菲, 韩娜, 李幸聪, 石丽芬. Al₂O₃/P₂O₅摩尔比对动力锂电池封接玻璃结构与性能的影响[J]. 无机材料学报, DOI: 10.15541/jim20250283.

WANG Weiwei, CAO Xin, LIU Junfei, YANG Xiaofei, HAN Na, LI Xingcong, SHI Lifen. Effect of Al₂O₃/P₂O₅ Molar Ratio on Structure and Properties of Sealing Glass for Power Lithium Batteries[J]. Journal of Inorganic Materials, DOI: 10.15541/jim20250283.

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Al₂O₃/P₂O₅摩尔比对动力锂电池封接玻璃结构与性能的影响

Effect of Al₂O₃/P₂O₅ Molar Ratio on Structure and Properties of Sealing Glass for Power Lithium Batteries

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