CN111430587A - 一种锂离子电池用石墨烯软包装膜 - Google Patents
一种锂离子电池用石墨烯软包装膜 Download PDFInfo
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 89
- 229910021389 graphene Inorganic materials 0.000 title claims abstract description 80
- 239000012785 packaging film Substances 0.000 title claims abstract description 30
- 229920006280 packaging film Polymers 0.000 title claims abstract description 30
- 238000009459 flexible packaging Methods 0.000 title claims abstract description 28
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 title claims abstract description 24
- 229910001416 lithium ion Inorganic materials 0.000 title claims abstract description 24
- 239000010410 layer Substances 0.000 claims abstract description 130
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- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
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- 239000004033 plastic Substances 0.000 description 1
- 229920005553 polystyrene-acrylate Polymers 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Abstract
本发明涉及电池包装膜技术领域，尤其是一种锂离子电池用石墨烯软包装膜，包括外保护层、第一粘合层、铝箔层、第二粘合层、内保护层和热封层，所述内保护层为填充有石墨烯的聚氨酯改性环氧树脂层，所述石墨烯的天剂量为聚氨酯改性环氧树脂的0.2‑0.4%，所述外保护层采用填充有石墨烯的尼龙层，所述外保护层与铝箔层的接触面上设有若干凸起，所述凸起呈正多棱锥形，所述铝箔层的上表面和下表面有钝化处理液处理的耐腐蚀层；本发明中的锂离子电池用石墨烯软包装膜，由于内保护层采用填充有石墨烯的聚氨酯改性环氧树脂，石墨烯与聚氨酯改性环氧树脂之间形成‑C=N=O键，使得环氧树脂层的静态断裂性比聚氨酯改性环氧树脂提高了约53%，耐冲击强度提高了约96.5%。
Description
技术领域
本发明涉及电池包装膜技术领域，尤其是一种锂离子电池用石墨烯软包装膜。
背景技术
电池用软包装膜通常为铝塑膜，一般包括尼龙层、金属箔层和热封层，尼龙层是保证铝塑膜的外形，减轻对外壳的损伤，保证在制造成锂离子电池之前，膜不会发生变形，阻止空气尤其是氧的渗透，维持电芯内部的环境，同时保证包装铝箔具备良好的形变能力。Al层是防止水的渗入，维持电芯内部的环境具有一定的厚度强度能够防止外部对电芯的损伤。电池用软包装膜虽然可以避免像钢塑电池那样发生爆炸，但是其阻隔性和抗拉伸性能还是有待提高，长期使用后，仍旧会出现爆炸的可能。
发明内容
本发明的目的是：克服现有技术中不足，提供一种阻隔性好、抗拉伸性能强的锂电池用石墨烯软包装膜。
为解决上述技术问题，本发明采用的技术方案如下：
一种锂离子电池用石墨烯软包装膜，包括外保护层、第一粘合层、铝箔层、第二粘合层、内保护层和热封层，所述内保护层为填充有石墨烯的聚氨酯改性环氧树脂层，所述石墨烯的天剂量为聚氨酯改性环氧树脂的0.2-0.4%，所述外保护层采用填充有石墨烯的尼龙层，所述外保护层与铝箔层的接触面上设有若干凸起，所述凸起呈正多棱锥形，所述铝箔层的上表面和下表面有钝化处理液处理的耐腐蚀层。
进一步的，所述石墨烯为经过强介质酸和强氧化剂对天然石墨烯进行氧化处理后得到的表面改性石墨烯。
进一步的，所述石墨烯在聚氨酯改性环氧树脂中呈定向排列。
进一步的，所述正多棱锥的高度为300-600nm，所述正多棱锥为正三棱锥、正四棱锥、五棱锥中的一种。
进一步的，所述耐腐蚀层的厚度为300-600nm。
进一步的，所述铝箔层的厚度为60-80μm。
进一步的，所述第一粘合层和第二粘合层选用聚苯乙烯、聚丙烯酸酯、乙烯—醋酸乙烯共聚物中的一种。
进一步的，所述第一粘合层和第二粘合层的厚度为2-3μm。
进一步的，所述热封层的厚度为20-30μm，所述热封层采用聚苯乙烯、聚丙烯酸酯、乙烯—醋酸乙烯共聚物中的一种。
采用本发明的技术方案的有益效果是：
本发明中的锂离子电池用石墨烯软包装膜，由于内保护层采用填充有石墨烯的聚氨酯改性环氧树脂，石墨烯与聚氨酯改性环氧树脂之间形成-C=N=O键，使得环氧树脂层的静态断裂性比聚氨酯改性环氧树脂提高了约53%，耐冲击强度提高了约96.5%。
具体实施方式
为使本发明的上述目的、特征和优点能够更加明显易懂，下面结合具体实施方式对本发明作进一步详细的说明。
一种锂离子电池用石墨烯软包装膜，包括外保护层、第一粘合层、铝箔层、第二粘合层、内保护层和热封层，所述内保护层为填充有石墨烯的聚氨酯改性环氧树脂层，所述石墨烯的天剂量为聚氨酯改性环氧树脂的0.2-0.4%，所述外保护层采用填充有石墨烯的尼龙层，所述外保护层与铝箔层的接触面上设有若干凸起，所述凸起呈正多棱锥形，所述铝箔层的上表面和下表面有钝化处理液处理的耐腐蚀层，本发明中的锂离子电池用石墨烯软包装膜，由于内保护层采用填充有石墨烯的聚氨酯改性环氧树脂，石墨烯与聚氨酯改性环氧树脂之间形成-C=N=O键，使得环氧树脂层的静态断裂性比聚氨酯改性环氧树脂提高了约53%，耐冲击强度提高了约96.5%。本发明中在外保护层与铝箔层的接触面上设有若干凸起，提高了外保护层在第一粘合层内的渗入性，提高了软包装膜的年和强度。
作为一个优选实施方式，本实施例中的石墨烯为经过强介质酸和强氧化剂对天然石墨烯进行氧化处理后得到的表面改性石墨烯。表面改性的石墨烯可以提高环氧树脂的冲击韧性、阻隔性、阻燃性。
作为一个优选实施方式，本实施例中的石墨烯在聚氨酯改性环氧树脂中呈定向排列。
作为一个优选实施方式，本实施例中的正多棱锥的高度为300-600nm，所述正多棱锥为正三棱锥、正四棱锥、五棱锥中的一种。
作为一个优选实施方式，本实施例中的耐腐蚀层的厚度为300-600nm。
作为一个优选实施方式，本实施例中的铝箔层的厚度为60-80μm。
作为一个优选实施方式，本实施例中的第一粘合层和第二粘合层选用聚苯乙烯、聚丙烯酸酯、乙烯—醋酸乙烯共聚物中的一种。
作为一个优选实施方式，本实施例中的第一粘合层和第二粘合层的厚度为2-3μm。
作为一个优选实施方式，本实施例中的热封层的厚度为20-30μm，所述热封层采用聚苯乙烯、聚丙烯酸酯、乙烯—醋酸乙烯共聚物中的一种。
实施例1
一种锂离子电池用石墨烯软包装膜，包括外保护层、第一粘合层、铝箔层、第二粘合层、内保护层和热封层，所述内保护层为填充有石墨烯的聚氨酯改性环氧树脂层，所述石墨烯的天剂量为聚氨酯改性环氧树脂的0.2%，所述外保护层采用填充有石墨烯的尼龙层，石墨烯为经过强介质酸和强氧化剂对天然石墨烯进行氧化处理后得到的表面改性石墨烯，石墨烯在聚氨酯改性环氧树脂中呈定向排列，所述外保护层与铝箔层的接触面上设有若干凸起，所述凸起呈正多棱锥形，正多棱锥的高度为300nm，所述正多棱锥为正三棱锥，铝箔层的厚度为60μm，所述铝箔层的上表面和下表面有钝化处理液处理的耐腐蚀层，耐腐蚀层的厚度为300nm。第一粘合层和第二粘合层选用聚苯乙烯，第一粘合层和第二粘合层的厚度为2μm，热封层的厚度为20μm，所述热封层采用聚苯乙烯。
实施例2
一种锂离子电池用石墨烯软包装膜，包括外保护层、第一粘合层、铝箔层、第二粘合层、内保护层和热封层，所述内保护层为填充有石墨烯的聚氨酯改性环氧树脂层，所述石墨烯的天剂量为聚氨酯改性环氧树脂的0.25%，所述外保护层采用填充有石墨烯的尼龙层，石墨烯为经过强介质酸和强氧化剂对天然石墨烯进行氧化处理后得到的表面改性石墨烯，石墨烯在聚氨酯改性环氧树脂中呈定向排列，所述外保护层与铝箔层的接触面上设有若干凸起，所述凸起呈正多棱锥形，正多棱锥的高度为350nm，所述正多棱锥为正三棱锥，铝箔层的厚度为65μm，所述铝箔层的上表面和下表面有钝化处理液处理的耐腐蚀层，耐腐蚀层的厚度为350nm。第一粘合层和第二粘合层选用聚苯乙烯，第一粘合层和第二粘合层的厚度为2.1μm，热封层的厚度为22μm，所述热封层采用聚苯乙烯。
实施例3
一种锂离子电池用石墨烯软包装膜，包括外保护层、第一粘合层、铝箔层、第二粘合层、内保护层和热封层，所述内保护层为填充有石墨烯的聚氨酯改性环氧树脂层，所述石墨烯的天剂量为聚氨酯改性环氧树脂的0.3%，所述外保护层采用填充有石墨烯的尼龙层，石墨烯为经过强介质酸和强氧化剂对天然石墨烯进行氧化处理后得到的表面改性石墨烯，石墨烯在聚氨酯改性环氧树脂中呈定向排列，所述外保护层与铝箔层的接触面上设有若干凸起，所述凸起呈正多棱锥形，正多棱锥的高度为400nm，所述正多棱锥为正四棱锥，铝箔层的厚度为70μm，所述铝箔层的上表面和下表面有钝化处理液处理的耐腐蚀层，耐腐蚀层的厚度为500nm。第一粘合层和第二粘合层选用聚丙烯酸酯，第一粘合层和第二粘合层的厚度为2.5μm，热封层的厚度为25μm，所述热封层采用聚丙烯酸酯。
实施例4
一种锂离子电池用石墨烯软包装膜，包括外保护层、第一粘合层、铝箔层、第二粘合层、内保护层和热封层，所述内保护层为填充有石墨烯的聚氨酯改性环氧树脂层，所述石墨烯的天剂量为聚氨酯改性环氧树脂的0.35%，所述外保护层采用填充有石墨烯的尼龙层，石墨烯为经过强介质酸和强氧化剂对天然石墨烯进行氧化处理后得到的表面改性石墨烯，石墨烯在聚氨酯改性环氧树脂中呈定向排列，所述外保护层与铝箔层的接触面上设有若干凸起，所述凸起呈正多棱锥形，正多棱锥的高度为500nm，所述正多棱锥为五棱锥，铝箔层的厚度为75μm，所述铝箔层的上表面和下表面有钝化处理液处理的耐腐蚀层，耐腐蚀层的厚度为500nm。第一粘合层和第二粘合层选用乙烯—醋酸乙烯共聚物，第一粘合层和第二粘合层的厚度为2.5μm，热封层的厚度为28μm，所述热封层采用乙烯—醋酸乙烯共聚物。
实施例5
一种锂离子电池用石墨烯软包装膜，包括外保护层、第一粘合层、铝箔层、第二粘合层、内保护层和热封层，所述内保护层为填充有石墨烯的聚氨酯改性环氧树脂层，所述石墨烯的天剂量为聚氨酯改性环氧树脂的0.4%，所述外保护层采用填充有石墨烯的尼龙层，石墨烯为经过强介质酸和强氧化剂对天然石墨烯进行氧化处理后得到的表面改性石墨烯，石墨烯在聚氨酯改性环氧树脂中呈定向排列，所述外保护层与铝箔层的接触面上设有若干凸起，所述凸起呈正多棱锥形，正多棱锥的高度为600nm，所述正多棱锥为正三棱锥，铝箔层的厚度为80μm，所述铝箔层的上表面和下表面有钝化处理液处理的耐腐蚀层，耐腐蚀层的厚度为600nm。第一粘合层和第二粘合层选用聚苯乙烯，第一粘合层和第二粘合层的厚度为3μm，热封层的厚度为30μm，所述热封层采用聚苯乙烯、聚丙烯酸酯。
本发明中的锂离子电池用石墨烯软包装膜，由于内保护层采用填充有石墨烯的聚氨酯改性环氧树脂，石墨烯与聚氨酯改性环氧树脂之间形成-C=N=O键，使得环氧树脂层的静态断裂性比聚氨酯改性环氧树脂提高了约53%，耐冲击强度提高了约96.5%。
以上述依据本发明的理想实施例为启示，通过上述的说明内容，相关工作人员完全可以在不偏离本项发明技术思想的范围内，进行多样的变更以及修改。凡在本发明的精神和原则之内，所做的任何修改、等同替换、改进等，均应包含在本发明的保护范围之内。本项发明的技术性范围并不局限于说明书上的内容，必须要根据权利要求范围来确定其技术性范围。
Claims (9)
1.一种锂离子电池用石墨烯软包装膜，其特征在于：包括外保护层、第一粘合层、铝箔层、第二粘合层、内保护层和热封层，所述内保护层为填充有石墨烯的聚氨酯改性环氧树脂层，所述石墨烯的天剂量为聚氨酯改性环氧树脂的0.2-0.4%，所述外保护层采用填充有石墨烯的尼龙层，所述外保护层与铝箔层的接触面上设有若干凸起，所述凸起呈正多棱锥形，所述铝箔层的上表面和下表面有钝化处理液处理的耐腐蚀层。
2.根据权利要求1所述的一种锂离子电池用石墨烯软包装膜，其特征在于：所述石墨烯为经过强介质酸和强氧化剂对天然石墨烯进行氧化处理后得到的表面改性石墨烯。
3.根据权利要求2所述的一种锂离子电池用石墨烯软包装膜，其特征在于：所述石墨烯在聚氨酯改性环氧树脂中呈定向排列。
4.根据权利要求1所述的一种锂离子电池用石墨烯软包装膜，其特征在于：所述正多棱锥的高度为300-600nm，所述正多棱锥为正三棱锥、正四棱锥、五棱锥中的一种。
5.根据权利要求1所述的一种锂离子电池用石墨烯软包装膜，其特征在于：所述耐腐蚀层的厚度为300-600nm。
6.根据权利要求1所述的一种锂离子电池用石墨烯软包装膜，其特征在于：所述铝箔层的厚度为60-80μm。
7.根据权利要求1所述的一种锂离子电池用石墨烯软包装膜，其特征在于：所述第一粘合层和第二粘合层选用聚苯乙烯、聚丙烯酸酯、乙烯—醋酸乙烯共聚物中的一种。
8.根据权利要求1所述的一种锂离子电池用石墨烯软包装膜，其特征在于：所述第一粘合层和第二粘合层的厚度为2-3μm。
9.根据权利要求1所述的一种锂离子电池用石墨烯软包装膜，其特征在于：所述热封层的厚度为20-30μm，所述热封层采用聚苯乙烯、聚丙烯酸酯、乙烯—醋酸乙烯共聚物中的一种。
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