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High‐Performance Al2O3/PAALi Composite Separator Prepared by Water‐Based Slurry for High‐Power Density Lithium‐Based Battery
Advanced Engineering Materials ( IF 3.4 ) Pub Date : 2020-11-18 , DOI: 10.1002/adem.202001009 Rong Xu 1 , Lei Sheng 1 , Hao Gong 1 , Yulong Kong 1 , Yang Yang 1 , Menglin Li 1 , Yaozong Bai 2 , Shangjun Song 2 , Gaojun Liu 2 , Tao Wang 1 , Xianli Huang 1 , Jianping He 1
Advanced Engineering Materials ( IF 3.4 ) Pub Date : 2020-11-18 , DOI: 10.1002/adem.202001009 Rong Xu 1 , Lei Sheng 1 , Hao Gong 1 , Yulong Kong 1 , Yang Yang 1 , Menglin Li 1 , Yaozong Bai 2 , Shangjun Song 2 , Gaojun Liu 2 , Tao Wang 1 , Xianli Huang 1 , Jianping He 1
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The ceramic composite separator shows great thermal stability and electrolyte wettability compared with polyolefin separator, which is applied in the supply source of electric vehicles. However, the preparation of ceramic composite separator is involved with large amount of organic solvents, and it is of great harm to health. Herein, lithium polyacrylate (PAALi) is selected as a novel binder to prepare the Al2O3/PAALi ceramic composite separator by water‐based slurry. The production of Al2O3/PAALi composite separator is more environmental‐friendly, and it also exhibits excellent thermal stability. In addition, the Al2O3/PAALi composite separator has obviously improved lithium transference number of 0.41, compared with polyethylene (PE) separator and Al2O3/polyvinylidene fluoride (PVDF) composite separator. It can be attributed to the fact that PAALi with a lot of carboxyl (COO−) functional groups has an interaction with ions and facilitates the desolvation of cation. As a result, the LiCoO2/Li half cell using Al2O3/PAALi composite separator shows higher discharge capacity retention (88%) after 180 cycles and excellent cycling stability. Fortunately, these cells containing Al2O3/PAALi composite separator also have wonderful rate performance; even at 5 C, the discharge capacity retention still keeps 58%, higher than Al2O3/PVDF composite separator. Therefore, this is a promising method to further enhance the battery performance.
中文翻译：
水基浆料制备的高性能Al2O3 / PAALi复合隔膜，用于高功率密度锂基电池
与聚烯烃隔板相比，该陶瓷复合隔板表现出出色的热稳定性和电解质润湿性，而聚烯烃隔板则应用于电动汽车的供应源中。然而，陶瓷复合隔板的制备涉及大量的有机溶剂，对健康危害很大。在此，选择聚丙烯酸酯锂（PAALi）作为新型粘合剂，通过水基浆料制备Al 2 O 3 / PAALi陶瓷复合隔板。Al 2 O 3 / PAALi复合隔板的生产更加环保，并且还具有出色的热稳定性。另外，Al 2 O 3与聚乙烯（PE）隔板和Al 2 O 3 /聚偏二氟乙烯（PVDF）复合隔板相比，/ PAALi复合隔板的锂传递数明显提高了0.41 。它可以归因于一个事实，即PAALi有很多羧基的（ COO - ）的官能团与离子的相互作用并促进阳离子的去溶剂化。结果，使用Al 2 O 3 / PAALi复合隔板的LiCoO 2 / Li半电池在180次循环后显示出较高的放电容量保持率（88％）和优异的循环稳定性。幸运的是，这些电池包含Al 2 O 3/ PAALi复合隔板也具有出色的速率性能；即使在5 C下，放电容量保持率仍保持58％，高于Al 2 O 3 / PVDF复合隔板。因此，这是进一步提高电池性能的有前途的方法。
更新日期：2020-11-18
中文翻译：
水基浆料制备的高性能Al2O3 / PAALi复合隔膜，用于高功率密度锂基电池
与聚烯烃隔板相比，该陶瓷复合隔板表现出出色的热稳定性和电解质润湿性，而聚烯烃隔板则应用于电动汽车的供应源中。然而，陶瓷复合隔板的制备涉及大量的有机溶剂，对健康危害很大。在此，选择聚丙烯酸酯锂（PAALi）作为新型粘合剂，通过水基浆料制备Al 2 O 3 / PAALi陶瓷复合隔板。Al 2 O 3 / PAALi复合隔板的生产更加环保，并且还具有出色的热稳定性。另外，Al 2 O 3与聚乙烯（PE）隔板和Al 2 O 3 /聚偏二氟乙烯（PVDF）复合隔板相比，/ PAALi复合隔板的锂传递数明显提高了0.41 。它可以归因于一个事实，即PAALi有很多羧基的（ COO - ）的官能团与离子的相互作用并促进阳离子的去溶剂化。结果，使用Al 2 O 3 / PAALi复合隔板的LiCoO 2 / Li半电池在180次循环后显示出较高的放电容量保持率（88％）和优异的循环稳定性。幸运的是，这些电池包含Al 2 O 3/ PAALi复合隔板也具有出色的速率性能；即使在5 C下，放电容量保持率仍保持58％，高于Al 2 O 3 / PVDF复合隔板。因此，这是进一步提高电池性能的有前途的方法。
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