A polyethylene microsphere-coated separator with rapid thermal shutdown function for lithium-ion batteries

Zhang, Chongrong; Li, Hui; Wang, Shixuan; Cao, Yong; Yang, Hanxi; Ai, Xinping; Zhong, Faping

doi:10.1016/j.jechem.2019.09.017

Cited by 71 publications

(26 citation statements)

References 29 publications

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“…Excessively low crystallization temperature is not conducive to the crystal growth, resulting in more crystal structure defects. Based on the above considerations, the casting crystallization temperature was set at 110 °C . The competition of crystallization between PP and PE during the casting process leads to the formation of nanoscale PE microspheres.…”

Section: Results and Discussionmentioning

confidence: 99%

Facile Preparation of a Lithium-Ion Battery Separator with Thermal Shutdown Function Based on Polypropylene/Polyethylene Microsphere Composites

Zhang

Ding

et al. 2021

Ind. Eng. Chem. Res.

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With the continuous development of energy density and charge− discharge rates of lithium-ion batteries in recent years, safety function has become the most concerning issue. In this work, a polypropylene (PP)/ polyethylene (PE) composited separator with shutdown function is prepared by a facile dry process with biaxial stretching. Owing to the thermodynamic incompatibility between PP and PE, PE crystallizes initially upon cooling and separates from PP melt, forming ample nanoscale PE microspheres within the PP matrix. The weak interfaces between PE microspheres and PP debond during biaxial stretching to create numerous micropores directly. More importantly, as the temperature rises to 135 °C, PE within the separator melts to block the channels for Li-ion transport; meanwhile, the PP matrix maintains the overall dimensional stability of the separator to prevent the internal short circuiting. Compared with the commercial PP/PE/PP trilayer separator manufacturing technique, this approach has advantages of simple techniques, environmental friendliness, continuous fabrication, and low manufacturing cost, which can offer practical guidance for large-scale low-cost manufacturing of high-performance separators.

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Section: Results and Discussionmentioning

confidence: 99%

Facile Preparation of a Lithium-Ion Battery Separator with Thermal Shutdown Function Based on Polypropylene/Polyethylene Microsphere Composites

Zhang

Ding

et al. 2021

Ind. Eng. Chem. Res.

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“…The second approach is to inhibit the ion diffusion between electrodes using thermal-shutdown separators. [27,28] The thermal shutdown separators are built based on polymer microspheres with melting points in the range of 80-180 C. Once the internal temperature of EES devices reaches the polymer melting point, the solid polymer microspheres will turn into a fused liquid and be covered on the electrode surface, blocking the ion diffusion, and switching off the EES devices. However, such thermal response of thermal-shutdown separator is irreversible.…”

Section: Temperature-responsive Electrolytes For Overheating-protecti...mentioning

confidence: 99%

Functional Electrolytes: Game Changers for Smart Electrochemical Energy Storage Devices

et al. 2021

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Electrochemical energy storage (EES) devices integrated with smart functions are highly attractive for powering the next‐generation electronics in the coming era of artificial intelligence. In this regard, exploiting functional electrolytes represents a viable strategy to realize smart functions in EES devices. In this review, recent advances in the development of functional electrolytes for smart EES devices like rechargeable batteries and supercapacitors are presented. Various stimulus‐responsive electrolytes are first summarized, including temperature‐, mechanical force‐, voltage‐, magnetism‐, and light‐responsive electrolytes. Emphasis is placed on the working principles of stimulus‐responsive electrolytes and their specific problem‐solving functions in EES devices. Then, the latest advances in electrochromic and self‐healing electrolytes used for smart EES devices are discussed. Finally, key challenges and research opportunities related to functional electrolyte design and smart EES device development are envisioned, with the goal of accelerating further research in this thriving field.

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“…Furthermore, in the same separator type and with the objective of enhancing thermal runaway, melaminebased porous organic polymer (POP) coatings [213] were implemented. In fact, different materials have been used as a layer on the surface of polyolefin separators to improve its wettability, including polyethyleneimine (PEI)/dopamine coating layer [188], Al 2 O 3 layers in electrospun PVDF nanofibers [193], ammonium persulfate (APS) coating [194], a phenolic resin (AF) layer with immersion in situ reaction [186], a thin layer of lowdensity polyethylene microspheres [199], polyamine (PAI) containing natural clay nanorods (attapulgite, ATP) [197], and polyvinyl alcohol (PVA) [214], TiO 2 [215], Al 2 O 3 [216], UVinduced graft with polar methyl acrylate (MA) [217], and polyimide (PI)-SiO 2 layers [218].…”

Section: Separator Membranementioning

confidence: 99%

“…The future trends on the separator technology include the development of more complex and multifunctional membranes, particularly with the increasing of the devices' safety, by adding shutdown functions to the separators [199]. Novel separator architectures based on three layers were developed combining electrospinning and electrospraying techniques and composed of PI and poly(amic acid) ammonium salt (PAAS) solution with inorganic nanoparticles (SiO 2 or Al 2 O 3 ) [185].…”

Section: Separator Membranementioning

confidence: 99%

Recent Advances on Materials for Lithium-Ion Batteries

et al. 2021

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Environmental issues related to energy consumption are mainly associated with the strong dependence on fossil fuels. To solve these issues, renewable energy sources systems have been developed as well as advanced energy storage systems. Batteries are the main storage system related to mobility, and they are applied in devices such as laptops, cell phones, and electric vehicles. Lithium-ion batteries (LIBs) are the most used battery system based on their high specific capacity, long cycle life, and no memory effects. This rapidly evolving field urges for a systematic comparative compilation of the most recent developments on battery technology in order to keep up with the growing number of materials, strategies, and battery performance data, allowing the design of future developments in the field. Thus, this review focuses on the different materials recently developed for the different battery components—anode, cathode, and separator/electrolyte—in order to further improve LIB systems. Moreover, solid polymer electrolytes (SPE) for LIBs are also highlighted. Together with the study of new advanced materials, materials modification by doping or synthesis, the combination of different materials, fillers addition, size manipulation, or the use of high ionic conductor materials are also presented as effective methods to enhance the electrochemical properties of LIBs. Finally, it is also shown that the development of advanced materials is not only focused on improving efficiency but also on the application of more environmentally friendly materials.

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A polyethylene microsphere-coated separator with rapid thermal shutdown function for lithium-ion batteries

Cited by 71 publications

References 29 publications

Facile Preparation of a Lithium-Ion Battery Separator with Thermal Shutdown Function Based on Polypropylene/Polyethylene Microsphere Composites

Facile Preparation of a Lithium-Ion Battery Separator with Thermal Shutdown Function Based on Polypropylene/Polyethylene Microsphere Composites

Functional Electrolytes: Game Changers for Smart Electrochemical Energy Storage Devices

Recent Advances on Materials for Lithium-Ion Batteries

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