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Amino‐Functionalized Al2O3 Particles Coating Separator with Excellent Lithium‐Ion Transport Properties for High‐Power Density Lithium‐Ion Batteries
Advanced Engineering Materials ( IF 3.4 ) Pub Date : 2020-06-05 , DOI: 10.1002/adem.201901545 Hui Zhang 1 , Lei Sheng 1 , Yaozong Bai 2 , Shangjun Song 2 , Gaojun Liu 2 , Hairong Xue 1 , Tao Wang 1 , Xianli Huang 1 , Jianping He 1
Advanced Engineering Materials ( IF 3.4 ) Pub Date : 2020-06-05 , DOI: 10.1002/adem.201901545 Hui Zhang 1 , Lei Sheng 1 , Yaozong Bai 2 , Shangjun Song 2 , Gaojun Liu 2 , Hairong Xue 1 , Tao Wang 1 , Xianli Huang 1 , Jianping He 1
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The coating method of Al2O3 nanoparticles has been widely applied to promote the thermostability and wettability of polyolefin separators. However, the untreated Al2O3/polyethylene (PE) composite separators still need to improve the ionic conductivity (σ) and lithium‐ion transference number (tLi+). Herein, a method is found to obtain amino‐functionalized Al2O3 nanoparticles (N‐Al2O3). As a result, the cell with the N‐Al2O3/PE composite separator has improved σ (0.39 mS cm−1) and tLi+ (0.49). The LiCoO2/Li half‐cell based on N‐Al2O3/PE composite separator exhibits higher discharge capacity (125 mAh g−1) and better cycle performance under the current density of 1 C. Furthermore, the cell containing N‐Al2O3/PE composite separator has a better rate performance and the discharge capacity still maintains 75 mAh g−1 at a high rate of 4 C. This method is effective and simple to modify the PE separator with the amino‐functionalized Al2O3 nanoparticles and enhance the high rate performance of Li‐ion batteries.
中文翻译：
具有出色锂离子传输性能的氨基功能化Al2O3颗粒涂层隔膜，适用于高功率密度锂离子电池
Al 2 O 3纳米颗粒的涂覆方法已被广泛地用于提高聚烯烃隔膜的热稳定性和润湿性。但是，未经处理的Al 2 O 3 /聚乙烯（PE）复合隔板仍然需要提高离子电导率（σ）和锂离子转移数（t Li +）。在本文中，发现了一种获得氨基官能化的Al 2 O 3纳米颗粒（N-Al 2 O 3）的方法。结果，带有N‐Al 2 O 3 / PE复合隔板的电池的σ（0.39 mS cm -1）和t Li +（0.49）。基于N‐Al 2 O 3 / PE复合隔膜的LiCoO 2 / Li半电池在1 C的电流密度下表现出更高的放电容量（125 mAh g -1）和更好的循环性能。此外，含有N‐Al的电池Al 2 O 3 / PE复合隔板具有更好的倍率性能，在4 C的高倍率下放电容量仍保持75 mAh g -1。该方法有效且简单地用氨基官能化的Al 2改性PE隔板O 3纳米颗粒，增强了锂离子电池的高倍率性能。
更新日期：2020-06-05
中文翻译：
具有出色锂离子传输性能的氨基功能化Al2O3颗粒涂层隔膜，适用于高功率密度锂离子电池
Al 2 O 3纳米颗粒的涂覆方法已被广泛地用于提高聚烯烃隔膜的热稳定性和润湿性。但是，未经处理的Al 2 O 3 /聚乙烯（PE）复合隔板仍然需要提高离子电导率（σ）和锂离子转移数（t Li +）。在本文中，发现了一种获得氨基官能化的Al 2 O 3纳米颗粒（N-Al 2 O 3）的方法。结果，带有N‐Al 2 O 3 / PE复合隔板的电池的σ（0.39 mS cm -1）和t Li +（0.49）。基于N‐Al 2 O 3 / PE复合隔膜的LiCoO 2 / Li半电池在1 C的电流密度下表现出更高的放电容量（125 mAh g -1）和更好的循环性能。此外，含有N‐Al的电池Al 2 O 3 / PE复合隔板具有更好的倍率性能，在4 C的高倍率下放电容量仍保持75 mAh g -1。该方法有效且简单地用氨基官能化的Al 2改性PE隔板O 3纳米颗粒，增强了锂离子电池的高倍率性能。
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