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首页> 外文期刊>Journal of Applied Polymer Science >Electrolyte-resistant epoxy for bonding batteries based on sandwich structures
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Electrolyte-resistant epoxy for bonding batteries based on sandwich structures

机译：电解质耐环氧基于夹层结构的粘接电池

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摘要

Adhesives that are stable in Li-ion battery electrolytes are required to realize the potential of new battery designs that integrate structural elements with energy storage. Here, several polymers, commercial adhesives, and sealants were investigated to bond and seal a Li-ion battery sandwich panel. Gravimetric electrolyte uptake measurements were compared with Hansen solubility parameters to predict long-term durability of the materials exposed to battery electrolyte. The durability of adhesively bonded joints with an epoxy adhesive, which was selected as the lowest electrolyte uptake material, was examined using single lap shear strength tests and three-point bending tests in a fabricated sandwich panel. The strength of the epoxy decreased after exposure to battery electrolyte due to solvent uptake in the bond. The addition of lithium hexafluorophosphate to the ethylene carbonate/dimethyl carbonate mixture severely decreased the strength with respect to the pure solvents. In device testing, the sandwich panel did not show any visible damage or leakage when loaded to above 1000 N during three-point bending tests. Using sol extraction measurements and differential scanning calorimetry analyses, the optimized curing temperature for the epoxy adhesive ranged from 80 to 100 degrees C. At these temperatures, the cured adhesive had a highly crosslinked structure with low sol extraction. (c) 2017 Wiley Periodicals, Inc.
机译：在锂离子电池电解质中稳定的粘合剂需要实现新电池设计的潜力，这些设计将结构元素与储能集成在一起。这里，研究了几种聚合物，商业粘合剂和密封剂，以键合并密封锂离子电池夹层板。将重量电解质吸收测量与汉森溶解度参数进行比较，以预测暴露于电池电解质的材料的长期耐久性。使用单圈​​剪切强度试验检查用单圈剪切强度试验和三点弯曲试验，检查用环氧粘合剂与环氧粘合剂的耐久性选择为最低电解质吸收材料。由于粘合剂的溶剂吸收，在电池电解质暴露后，环氧树脂的强度降低。向碳酸乙酯/二甲基酯混合物中加入六氟磷酸锂严重降低了相对于纯溶剂的强度。在设备测试中，在三点弯曲测试期间，夹心板在装载到1000 n以上时，夹层面板没有显示出任何可见的损坏或泄漏。使用溶胶提取测量和差示扫描量热法分析，在这些温度下，环氧粘合剂的优化固化温度范围为80至100摄氏度，固化粘合剂具有高溶胶萃取的高度交联结构。 （c）2017 Wiley期刊，Inc。

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