Testing and modeling of an in situ shear exfoliated 2D nanocomposite coating casing material for the suppression of Li-ion battery fires in electric vehicles
Testing and modeling of an in situ shear exfoliated 2D nanocomposite coating casing material for the suppression of Li-ion battery fires in electric vehicles
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DOI：
10.1557/s43580-023-00602-5
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发表时间：
2023-07
期刊：
影响因子：
0.8
通讯作者：
Md Abdur Rahman Bin Abdus Salam;M. Rahman;M. H. Kabir;Elmmer Vera Alvarado;Tousif Sadman;R. Mahamud;L. Cano;A. Ashraf
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文献类型：
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作者：
Md Abdur Rahman Bin Abdus Salam;M. Rahman;M. H. Kabir;Elmmer Vera Alvarado;Tousif Sadman;R. Mahamud;L. Cano;A. Ashraf
将二维纳米复合涂层材料龙皮®(DS)（阻燃有机硅弹性体和六方氮化硼（hBN）（DS/hBN）的混合物应用于传统的聚碳酸酯电池外壳材料上，研究其对阻燃性的影响。使用微批量混合器同时从块状层状六方氮化硼原材料中剥离六方氮化硼纳米片，并将这些纳米层分散到龙皮聚合物前驱体和固化剂中。标准‘UL94按照可燃性测试协议测量制备的涂层的阻燃性，测试结果表明，与 DS 样品相比，DS/hBN 样品的阻燃性有所增强，这符合数值模拟中发现的趋势。此外，即使在长时间暴露于火焰后，DS/hBN 涂层电池外壳材料的机械强度仍保持不变，这为制造坚固的电动汽车电池外壳的低成本六方氮化硼涂层打开了大门。
A two-dimensional nanocomposite coating material, a mixture of dragon skin®(DS) (flame-resistant silicone elastomer and hexagonal boron nitride(hBN) (DS/hBN), was applied on the traditional polycarbonate battery casing material to study its effect on flame retardancy. A micro-batch mixer was used to simultaneously exfoliate hBN nanosheets from bulk layered hBN raw materials and disperse these nanolayers into both dragon skin polymer precursor and curing agent. Standard ‘UL94 Flammability Test’ protocol was followed to measure the flame retardancy of the prepared coating. The test showed enhanced flame retardancy in horizontal and vertical tests for DS/hBN sample as compared to the DS sample, which followed the trend found in numerical simulation. Additionally, the mechanical strength of DS/hBN-coated battery casing material remained intact even after prolonged flame exposure. This opens the door for manufacturing of low-cost hBN coating for robust electric vehicle battery casings.