当前位置：
X-MOL 学术
›
Energy Technol.
›
论文详情
Our official English website, www.x-mol.net, welcomes your
feedback! (Note: you will need to create a separate account there.)
Binder‐Free TiO2‐Coated Polypropylene Separators for Advanced Lithium‐Ion Batteries
Energy Technology ( IF 3.6 ) Pub Date : 2020-04-29 , DOI: 10.1002/ente.202000228 Miao Zhu 1 , Qian Wang 1 , Henghui Zhou 1, 2 , Limin Qi 1
Energy Technology ( IF 3.6 ) Pub Date : 2020-04-29 , DOI: 10.1002/ente.202000228 Miao Zhu 1 , Qian Wang 1 , Henghui Zhou 1, 2 , Limin Qi 1
Affiliation
|
Modification with inorganic nanoparticles is a common method to enhance the thermal stability, electrolyte wettability, and overall functionality of commercial separators. However, the binders frequently used reduce the specific capacity of batteries and tend to swell in the electrolyte. Herein, a novel type of inorganic thin layer–coated separator that is easy to prepare and does not require a binder is designed. After treating by UV/O3, a thin titania layer is uniformly deposited on the surface of a commercial polypropylene (PP) separator by a facile sol–gel coating method. The thin TiO2 layer considerably improves the thermal stability of the separator, and there is no obvious shrinkage when the separator is heated at 170 °C for 30 min. At the same time, the electrolyte wettability is greatly improved after modification, which increases the Li+ migration rate. A LiFePO4/Li battery with the PP@TiO2 separator shows superior rate capability and cycle performance at high currents; particularly, it demonstrates a high capacity of 92.6 mAh g−1 at 15 C. The modified separator simultaneously improves the safety and electrochemical performance of the batteries, which will help to achieve the goal of preparing high‐safety, high‐capacity lithium‐ion batteries (LIBs).
中文翻译：
用于高级锂离子电池的无粘结剂TiO2涂层聚丙烯隔膜
用无机纳米颗粒进行改性是增强商业隔板的热稳定性，电解质润湿性和整体功能的常用方法。然而，经常使用的粘合剂降低了电池的比容量并且倾向于在电解质中溶胀。在这里，设计了一种新型的无机薄层涂层隔膜，该隔膜易于制备且不需要粘合剂。经过UV / O 3处理后，通过简便的溶胶-凝胶涂覆方法，在商用聚丙烯（PP）隔膜的表面均匀地沉积了一层薄的二氧化钛层。薄TiO 2层大大提高了隔板的热稳定性，并且在170°C加热隔板30分钟时没有明显的收缩。同时，改性后电解质的润湿性大大提高，这增加了Li +迁移速率。带有PP @ TiO 2隔膜的LiFePO 4 / Li电池在高电流下显示出卓越的倍率性能和循环性能。特别是，它在15 C时具有92.6 mAh g -1的高容量。改进的隔膜同时提高了电池的安全性和电化学性能，这将有助于实现制备高安全性，高容量锂离子电池的目标电池（LIB）。
更新日期：2020-07-02
中文翻译：
用于高级锂离子电池的无粘结剂TiO2涂层聚丙烯隔膜
用无机纳米颗粒进行改性是增强商业隔板的热稳定性，电解质润湿性和整体功能的常用方法。然而，经常使用的粘合剂降低了电池的比容量并且倾向于在电解质中溶胀。在这里，设计了一种新型的无机薄层涂层隔膜，该隔膜易于制备且不需要粘合剂。经过UV / O 3处理后，通过简便的溶胶-凝胶涂覆方法，在商用聚丙烯（PP）隔膜的表面均匀地沉积了一层薄的二氧化钛层。薄TiO 2层大大提高了隔板的热稳定性，并且在170°C加热隔板30分钟时没有明显的收缩。同时，改性后电解质的润湿性大大提高，这增加了Li +迁移速率。带有PP @ TiO 2隔膜的LiFePO 4 / Li电池在高电流下显示出卓越的倍率性能和循环性能。特别是，它在15 C时具有92.6 mAh g -1的高容量。改进的隔膜同时提高了电池的安全性和电化学性能，这将有助于实现制备高安全性，高容量锂离子电池的目标电池（LIB）。
京公网安备 11010802027423号