Permeability and barrier layer properties of a woven carbon fibre polymer composite as battery packaging

IF 5.3 Q2 MATERIALS SCIENCE, COMPOSITES Composites Part C Open Access Pub Date : 2024-07-01 DOI:10.1016/j.jcomc.2024.100490

K. Pattarakunnan , J. Galos , W. Tian , A.S. Best , I.L. Kyratzis , A .P. Mouritz

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Abstract

Carbon fibre reinforced polymer (CFRP) laminates are used in various studies as Li-ion polymer (LiPo) battery packaging. However, their suitability as a packaging material is not well understood. The present study investigates the liquid absorption (water and lithium bis(trifluoromethanesulfonic)imide (LiTFSI) electrolyte immersion tests) and barrier layer properties (water vapour transmission rate (WVTR) and oxygen transmission rate (OTR) tests) of a 200 gsm woven CFRP laminate to assess its suitability as a battery packaging material. This is the first study to show that prolonged immersion in battery electrolyte does not change the mechanical properties of a woven CFRP laminate. Hence, the CFRP laminate may be suitable for structural battery components, such as current collectors and electrodes. However, CFRP should not be used as battery packaging, as OTR and WVTR values of the CFRP laminate were found to be five and one order of magnitudes higher than typical battery pouch materials (i.e. aluminium foil), respectively.

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用作电池封装的碳纤维聚合物编织复合材料的透气性和阻隔层性能

在多项研究中，碳纤维增强聚合物（CFRP）层压板被用作锂离子聚合物（LiPo）电池的包装材料。然而，人们对其作为包装材料的适用性还不甚了解。本研究调查了 200 克/平方米编织 CFRP 层压板的液体吸收性（水和双（三氟甲磺酸）亚胺锂（LiTFSI）电解液浸泡测试）和阻隔层特性（水蒸气透过率（WVTR）和氧气透过率（OTR）测试），以评估其作为电池包装材料的适用性。这是首次研究表明，长期浸泡在电池电解液中不会改变编织 CFRP 层压板的机械性能。因此，CFRP层压板可能适用于电池结构部件，如集流体和电极。但是，CFRP 不宜用作电池包装，因为研究发现 CFRP 层压材料的 OTR 值和 WVTR 值分别比典型的电池袋材料（即铝箔）高出五个和一个数量级。

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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