ments of today''s 3C products and power batteries and the development of separators that can meet the requirements of high-performance LIBs has become an urgent demand of …
Learn MoreWith the wide applications of lithium-ion batteries (LIBs) in electronic devices and electric vehicles, it is of great importance to improve their safety and electrochemical performance. Herein, soluble polyimides (PI) containing carboxyl groups (−COOH) were synthesized by a simple one-step method and PI separators with sponge …
Learn MoreThe separator is an essential component of lithium-ion batteries (LIBs), and polyimide (PI), a high-performance polymer with outstanding mechanical and thermal properties and a strong electrolyte affinity, has received substantial research as a potential separator material. In this work, we fabricated a PI composite separator (PI/WO3) by …
Learn MoreTo improve the safety of lithium-ion batteries (LIBs), an AlOOH-coated polyimide (API) fibrous membrane as an inorganic composite separator is developed via an electrospinning technique and a subsequent blade-coating process. Benefiting from the good thermostability of polyimide and the flame-retarding property of AlOOH, the API …
Learn MoreA high temperature operating nanofibrous polyimide separator in Li-ion battery. Solid State Ionics (2013) G. Sun et al. ... Electrospun polyacrylonitrile nanofibrous membranes with varied fiber diameters and different membrane porosities as lithium-ion battery separators. Electrochimica Acta, Volume 236, 2017, pp. 417-423.
Learn MoreThe separator is a crucial component of lithium-ion batteries, playing a vital role in ion transfer and preventing polarization of the battery. To solve the problem of poor thermal safety of separators in lithium-ion batteries, in this work, three types of hydrophobic silica aerogels are compared.
Learn MoreThe separator is an essential component of lithium-ion batteries (LIBs), and polyimide (PI), a high-performance polymer with outstanding mechanical and thermal properties and a strong electrolyte ...
Learn MoreSeparators are vital parts of all lithium-ion batteries (LIBs), and they play a critical role in their thermal safety and electrochemical performance. Considering the low thermal stability and inferior electrolyte wettability of commercial polyolefin membranes, in this study, a novel thermotolerant polyimide aerogel (PIA) separator is designed.
Learn More1. Introduction. The rapid development and extensive adhibition of lithium-ion batteries (LIBs) are profoundly affecting the life style of mankind because of their plentiful advantages such as high-energy density, long-cycle life and environmental protection [1], [2].The separator, one of the primary compositions of batteries, likewise …
Learn MoreThe porous polyimide (PI) membranes were prepared by phase transfer method. The molecular structure, pore size, contact angle and thermal stability were …
Learn MoreAn advanced polyimide (C-PI) separator was designed by the co-precursor method and molecular structure designation. • The C-PI separator possessed high porosity, good flexibility, excellent thermal stability, and superior electrolyte wettability. • Lithium-ion battery with C-PI separator demonstrated 93.6% retention after 1000 cycles. •
Learn MoreStudy on preparation of polyacrylonitrile/polyimide composite lithium-ion battery separator by electrospinning - Volume 34 Issue 4 ... Study on preparation of polyacrylonitrile/polyimide composite lithium-ion battery separator by electrospinning. Published online by Cambridge University Press: 20 February 2019. Lin Li [Opens in a …
Learn MoreLithium–sulfur batteries (LSBs) have broad application prospects in high density energy storage. Nevertheless, LSBs present serious safety concerns and rapid capacity decay due to the flammability and contractility of commercial separators at high temperatures and lithium polysulfide (LiPSs) dissolution. In view of this, a multifunctional …
Learn MoreOther examples of cellulosic separators are polyimide/cellulose lithium battery separator paper (Wang, Zhao, Han, & Jiang, 2019), chemically modified TEMPO (2,2,6,6-tetramethylpiperidine-1-oxyl ...
Learn MoreLithium-ion battery separators: Recent developments and ...
Learn MoreIn this study, a novel electrospun polyimide (PI) nanofiber membrane used as the separator for lithium-sulfur battery was prepared successfully by different preparation processes. Compared with the polyolefin membranes, the PI nanofiber separator prepared via a hot pressing process in polyamic acid (PAA) membrane has …
Learn MoreThe polyolefin-based separator, which is the most widely used separator for lithium-ion batteries, is hydrophobic, undergoes significant shrinkage at high temperatures, and is physically weak. ... Carboxylated polyimide separator with excellent lithium ion transport properties for a high-power density lithium-ion battery. J. Mater. …
Learn MorePolyimide-based separators are promising for next-generation rechargeable batteries with enhanced safety and energy density. The molecular design strategies and microstructural control methods for high-performance polyimide-based separators for lithium-ion batteries are reviewed in detail. Download: Download high …
Learn MoreDesign of block-copolymer nanoporous membranes for robust and safer lithium-ion battery separators. Adv. Sci., 8 (2021), Article 2003096, 10.1002/advs.202003096. ... Carboxylated polyimide separator with excellent lithium ion transport properties for a high-power density lithium-ion battery. J. Mater. Chem. A, 6 ...
Learn MoreThermally stable 3D cross-linked fluorinated polyimide/PVDF-HFP hybrid separator for lithium battery applications. Author links open overlay panel Zabish Bilew Muche a, Yosef Nikodimos a, Teshager Mekonnen ... the fabrication of polyimide-based separators is a vibrant area of research field to overcome issues/common problems of …
Learn MoreTo improve the lithium-ion transport ability and cycle life of lithium-ion batteries, a high-performance polyimide-based lithium-ion battery separator (PI-SO 3) was prepared by chemically grafting zwitterion onto the surface of heat-resistant polyimide nanofiber matrix with the assistance of amino-rich polyethyleneimine (PEI).The PI-SO 3 …
Learn MoreSeparators are vital parts of all lithium-ion batteries (LIBs), and they play a critical role in their thermal safety and electrochemical performance. Considering the …
Learn MoreAn advanced polyimide (C-PI) separator was designed by the co-precursor method and molecular structure designation. • The C-PI separator possessed …
Learn MoreLithium–metal batteries require the effective suppression of lithium dendrites to guarantee both high performance and safety. Today''s separators have macropores allowing lithium dendrites to traverse, leading to internal short circuits and other catastrophic results. Herein, we report a mesoporous polyimide separator for dendrite …
Learn MoreThe separator is a critical component in improving the safety and charge–discharge property of lithium-ion batteries (LIBs). However, the poor heat resistance and flame retardancy of commercial polyolefin separators easily increase the risk of short circuit and thermal runaway, thus affecting the safety, service life, and …
Learn MoreThe incorporation of highly polarized inorganic compounds in functional separators is expected to alleviate the high temperature safety- and performance-related issues for promising lithium–sulfur batteries. In this work, a unique Co3O4 polyhedral coating on thermal-stable polyimide (PI) separators was developed by a simple one …
Learn MorePolyimide (PI) membranes with superior chemical resistance, insulation and self-extinguishing are attracting numerous attentions as the separators of lithium-ion batteries (LIBs), but significant challenges of low mechanical strength and poor electrolyte affinity still remain.
Learn MoreA zeolite/polyimide composite separator with a spongy-like structure was prepared by phase inversion methods based on heat-resistant polyimide (PI) polymer matrix and ZSM-5 zeolite filler, with the aim to improve the thermal stability and electrochemical properties of corresponding batteries. The separator exhibits enhanced …
Learn MoreThe separator with excellent mechanical and thermal properties are highly required for lithium ion batteries (LIBs). Therefore, it is crucial to develop novel nanofibrous membranes with enhanced mechanical strength and thermal stability. In this work, the fluorinated polyimide (FPI) was synthesized and blended with polyvinylidene fluoride …
Learn MoreOwing to its excellent thermal stability, polyimide (PI) is regarded as one of the most promising alternatives among separators for high-safety lithium-ion batteries (LIBs). Unfortunately, the wettability of …
Learn MorePolyimides (PIs) as coatings, separators, binders, solid-state electrolytes, and active storage materials help toward safe, high-performance, and long-life lithium-ion …
Learn MoreThe high porosity, high thermal stability, great electrolyte wettability, and electrolyte absorption ability behavior of polyimide nanofiber separators drew a lot of attention in the lithium-ion battery. However, some issues with porosity, mechanical strength, electrolyte wettability, and ionic conductivity still need to be further improved.
Learn MoreOwing to the aerogel coating layer with uniform nanopores of ∼100 nm, the PIFAP-2 separator can contribute to homogenize lithium deposition and acquire a …
Learn MoreTo inhibit Li-dendrite growth on lithium (Li)-metal electrodes, which causes capacity deterioration and safety issues in Li-ion batteries, we prepared a porous polyimide (PI) sponge using a solution-processable high internal-phase emulsion technique with a water-soluble PI precursor solution; the process is not only simple but also …
Learn Morepolyimide lithium ion battery separator is studied. The experimental results show that although the degree of imidization is decreased by the heat treatment at 350 C, it has better cycle performance (300 circles) and rate performance (even at high rates of 6 C). Introduction Lithium ion battery (LIB) is considered as the best
Learn MoreThe high performances of SiO 2 /Al 2 O 3-coated electrospun polyimide fibrous separator for lithium-ion battery. Author links open overlay panel Xingxing Liang d, Ying Yang a b c, Xin Jin e, Zhenghong Huang f, Feiyu Kang f. Show more. Add to Mendeley. ... A high temperature operating nanofibrous polyimide separator in Li-ion battery. Solid ...
Learn MoreHerein, we report a series of titania (TiO 2)-coated polymeric nanofibers membranes with superb strength, excellent thermal stability, and admirable wettability via in situ coating TiO 2 nano-shells on the surface of polyimide (PI) nanofibers. TiO 2 nano-shells are able to weld the PI nanofibers and serve as a reinforcement layer, endowing the TiO …
Learn MoreCommercial polyolefin separators often cause explosions and thermal runaways in lithium-ion batteries due to their poor thermal stability. Therefore, various polymer separators with high thermal stability have attracted the attention of researchers. In this paper, a kind of special nano-TiO2/Polyimide (TiO2@PI) composite separator was …
Learn MoreUltra-robust polyimide nanofiber separators with shutdown function for advanced lithium-ion batteries. Author links open overlay panel Guohua Sun a, Shuangjie Jiang a, Xixi Feng a, ... Recent advances in lithium-ion battery separators with reversible/irreversible thermal shutdown capability. Energy Storage Mater., 43 (2021), pp. …
Learn MorePreparation of porous fluorinated polyimide separator for lithium-ion batteries by non-solvent induced phase separation process. Article. Feb 2021; HIGH PERFORM POLYM; Yake Shi; Biao Yuan;
Learn MoreA porous polyimide (PI) membrane is successfully prepared via nonsolvent-induced phase separation with two porogens: …
Learn MoreThe thermal stability of lithium-ion battery separator is very desirable to satisfy the requirements of EVs. Polyacrylonitrile (PAN) fiber membranes with excellent ionic conductivity and polyimide (PI) with excellent mechanical properties and flame retardancy have been attracted much attention. In this study, a PI/PAN/PI sandwich separator with …
Learn MoreOwing to its excellent thermal stability, polyimide (PI) is regarded as one of the most promising alternatives among separators for high-safety lithium-ion batteries (LIBs). Unfortunately, the wettability of the PI separator to electrolytes is still undesirable. The complexation–hydrolyzation method was used to develop a composite membrane …
Learn MoreCurrently, the commercial lithium ion battery (LIB) separators are mainly polyolefin microporous separators, which has many advantages of high strength, good chemical stability, and low cost. ... A high temperature operating nanofibrous polyimide separator in Li-ion battery. Solid State Ionics, 232 (2013), pp. 44-48, …
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