E3S Web Conf.
Volume 308, 20212021 6th International Conference on Materials Science, Energy Technology and Environmental Engineering (MSETEE 2021)
|Number of page(s)||6|
|Section||Energy Resource Development and Energy Saving Technology|
|Published online||27 September 2021|
The Development of High-Power LIBs Separators
1 College of Mechanical and Electrical, Shanghai Jianqiao University, Shanghai, 201306, China
2 College of Engineering, University of Florida, Gainesville, FL, 32611, USA
3 School of Material Science and Engineering, Sun Yat-sun University, Guangzhou, Guangdong, 510006, China
Separators present the crucial functions of separating the positive and negative electrodes due to the free flow of lithium ions through the liquid electrolyte that fills in their open pore. Separators for liquid electrolyte Lithium-ion batteries can be classified into porous polymeric membranes, nonwoven mats, and cellulose separators. When a lithium-ion battery is being overcharged, it releases the heat and results in the inner-short. The polyethylene (PE) separators used here had shut down at around 135°C to cool the exothermal batteries. To enhance the meltdown temperature of the separator, a PE separator was coated with polymers synthesized from various ethylene glycol dimethacrylate monomers. At the same time, nonwoven mats have the potential to be low cost and thermally stable separators. Furthermore, the lithium-ion phosphate/lithium half cell using cellulose separator exhibited stable charge-discharge capability even at 120 °C. This paper presents an overview of the PE and PP membranes of lithium-ion battery separators, discusses how to solve their disadvantages, and reviews the cellulose-based materials developed for potential application in the lithium-ion battery.
© The Authors, published by EDP Sciences, 2021
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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