Thermosensitive Polyacrylonitrile/Polyethylene Oxide/Polyacrylonitrile Membrane Separators for Prompt and Safer Thermal Lithium-Ion Battery Shutdown

Gong, Wenzheng; Zhang, Zhi; Wei, Shuya; Ruan, Shilun; Shen, Changyu; Turng, Lih‐Sheng

doi:10.1149/1945-7111/ab615f

Cited by 28 publications

(14 citation statements)

References 44 publications

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“…A sandwich-like polyacrylonitrile/polyethylene oxide/polyacrylonitrile (PAN/PEO/PAN) fibrous separator was prepared by electrospinning. [62] The asprepared PAN/PEO/PAN separator exhibited promoted thermal shutdown property and high thermal stability. The inner layer of fusible PEO quickly melted and triggered thermal shutdown of the separator at 80 °C, whereas the outer PAN layers remained dimensionally stable at 200 °C.…”

Section: Thermal Shutdown Separators and Electrodes Based On Ionic Blocking Of Polymer Coatingsmentioning

confidence: 98%

Thermal‐Responsive and Fire‐Resistant Materials for High‐Safety Lithium‐Ion Batteries

Li¹,

Wang²,

Zhu³

et al. 2021

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is due to their high specific energy density, long cycling lifespan, and portability. [7][8][9][10] Currently, state-of-the-art LIBs (without packaging materials) can achieve a high specific energy density of ≈250 Wh kg −1 . Next-generation LiS and Li-air systems can further increase the battery energy densities beyond 600 and 900 Wh kg −1 , respectively. [11,12] With the energy density increasing, more attention should be paid to the safety of LIBs, as the chemical energy can be abruptly released in the forms of fires and explosions once the battery is not properly handled. [13][14][15][16][17][18] Currently, the safety issues are also regarded as one of the significant challenging barriers that limit the widespread adoption of LIBs for modern electrical vehicles. [19,20] A typical lithium-ion cell is composed of an anode, a cathode, liquid electrolytes, and a separator, [1] as illustrated in Figure 1A. The active materials are mixed with polymer binders and conductive carbon additives and then coated onto aluminum and copper foil current collectors to make the cathode and anode, respectively. Layered, spinel, and polyanion-type lithium-transitional metal oxides and phosphates including LiCoO 2 , LiMn 2 O 4 , LiFePO 4 , and their derivatives (LiMn x Ni y O 4 , LiNi 1−y−z Mn y Co z O 2 , etc.) have been used as cathode materials for LIBs due to their high lithium intercalation capacity and potential. [5] Graphite is the most frequently used anode material for LIBs because of its high abundance, low cost, and good reversibility. [21,22] Other materials such as carbon, [23] silicon, [24][25][26] and transition metal oxides-based materials with various structures and compositions have been studied as anodes for LIBs. [27][28][29] Some of them show promising capacity but there are still many challenges in scaled-up productions and practical applications. [30,31] For details of studies on structural design and performance optimization of the LIB anode materials, readers may refer to a comprehensive review published recently. [32] The liquid electrolyte provides a medium for fast Li + ions transport. [33,34] The separator is applied to prevent direct contact between the cathode and anode while permitting the ion transfer. [35][36][37][38] During the charging process, Li + ions are deintercalated from the cathode host and insert into the anode. On discharge, Li + ions migrate reversely from the above process, and electrons pass through the external circuit, supplying electricity [1] (Figure 1A). A passivation layer of solid-electrolyte-interphase (SEI) is generated on the anode surface during the initial few charging cycles, As one of the most efficient electrochemical energy storage devices, the energy density of lithium-ion batteries (LIBs) has been extensively improved in the past several decades. However, with increased energy density, the safety risk of LIBs becomes higher too. The frequently occurred battery accidents worldwide remind us that safeness is a crucial requirement for LIBs, especially in environments ...

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Section: Thermal Shutdown Separators and Electrodes Based On Ionic Blocking Of Polymer Coatingsmentioning

confidence: 98%

Thermal‐Responsive and Fire‐Resistant Materials for High‐Safety Lithium‐Ion Batteries

Li¹,

Wang²,

Zhu³

et al. 2021

Small

View full text Add to dashboard Cite

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“…If temperature rises, the fusible interlayer will melt and merge, forming a pore‐free layer and completely cutting off the lithium‐ion transfer channels. [ 158 ] Meanwhile, the robust outer layers serve as the mechanically dimensional support to avoid the contact of electrodes above the shutdown temperature. The Celgard PP/PE/PP trilayer membrane is a typical multilayer separator.…”

Section: Advanced Separators For High‐safety Batteriesmentioning

confidence: 99%

Safer Lithium‐Ion Batteries from the Separator Aspect: Development and Future Perspectives

Liu

Jiang

et al. 2020

Energy & Environ Materials

135

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With the rapid development of lithium‐ion batteries (LIBs), safety problems are the great obstacles that restrict large‐scale applications of LIBs, especially for the high‐energy‐density electric vehicle industry. Developing component materials (e.g., cathode, anode, electrolyte, and separator) with high thermal stability and intrinsic safety is the ultimate solution to improve the safety of LIBs. Separators are crucial components that do not directly participate in electrochemical reactions during charging/discharging processes, but play a vital role in determining the electrochemical performance and safety of LIBs. In this review, the recent advances on traditional separators modified with ceramic materials and multifunctional separators ranging from the prevention of the thermal runaway to the flame retardant are summarized. The component–structure–performance relationship of separators and their effect on the comprehensive performance of LIBs are discussed in detail. Furthermore, the research challenges and future directions toward the advancement in separators for high‐safety LIBs are also proposed.

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“…The real axis intercept of the curves at high frequency determines the resistance of the liquid electrolyte-soaked separator. 20 Compared with the PP separator (428.3 X), the resistances of the PAN separator and composite separator are 290.6 X and 167.0 X, because of the higher porosity and wettability of these nanofiber separators.…”

Section: Electrochemical Performancementioning

confidence: 99%

Oriented PAN/PVDF/PAN laminated nanofiber separator for lithium-ion batteries

Zheng

Zhou

Zhao

et al. 2021

Textile Research Journal

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Electrospun nanofiber separators have excellent properties in terms of large surface area and high porosity, which benefits the rate capability, electrochemical stability, and safety performance of lithium-ion batteries. Herein, a 0°PAN/PVDF/90°PAN-oriented composite nanofiber separator is prepared, which is prepared layer by layer by electrospinning technology and drum orientation collector. The results show that when the rotating speed of the drum is 600 r min−1, the 0°PAN/PVDF/90°PAN-oriented composite nanofiber separator has high porosity (about 85%), improved transverse and longitudinal tensile properties (10.33 MPa and 11.03 MPa, respectively), good dimensional stability at 160°C, and good electrochemical performance (specific charge capacity of 165 mAh g−1 at 0.5C and 142.7 mAh g−1 at 1C, capacity retention of 90% after 100 cycles).

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Thermosensitive Polyacrylonitrile/Polyethylene Oxide/Polyacrylonitrile Membrane Separators for Prompt and Safer Thermal Lithium-Ion Battery Shutdown

Cited by 28 publications

References 44 publications

Thermal‐Responsive and Fire‐Resistant Materials for High‐Safety Lithium‐Ion Batteries

Thermal‐Responsive and Fire‐Resistant Materials for High‐Safety Lithium‐Ion Batteries

Safer Lithium‐Ion Batteries from the Separator Aspect: Development and Future Perspectives

Oriented PAN/PVDF/PAN laminated nanofiber separator for lithium-ion batteries

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