Thermally-stable and high-performance composite separators for lithium-ion batteries are fabricated by combining metal–organic framework pore-forming agent and aramid nanofiber network skeleton. The composite separator exhibits excellent thermal stability (melting-point above 300 ℃ and decomposition temperature above 500 ℃), flame-retardant property
Herein, three electrolyte-insoluble brominated flame retardants (BFRs) are selected and coated on both sides of commercial polypropylene separators by a facile slurry coating method. The effects of the three BFRs on the safety and electrochemical properties of LSBs are characterized and compared.
The electrospun nanofibrous membrane has the advantages of high porosity, high liquid absorption and corrosion resistance so that it has been widely used as battery separator [17]. Adding flame retardant directly to electrospinning solution is an important method to prepare flame retardant battery separator, which can limit battery fire to the
Herein, we design a green, cellulose-based separator (Cel@DBDPE) with a unique encapsulation structure for lithium-ion batteries, in which functional flame retardants (DBDPE) are wrapped in microscrolls
Developing an optimal multifunctional flame-retardant separator is crucial for enhancing lithium metal battery (LMB) safety. However, this task poses challenges due to the inferior electrochemical stability and limited ion
A "sandwich" separator (SPS-B) is designed by integrating silk fibroin (SF), decabromodiphenyl ethane, and polyvinyl alcohol through electrospinning. SPS-B shows
DOI: 10.1016/J.ENSM.2021.02.042 Corpus ID: 233570204; Recent progress in flame-retardant separators for safe lithium-ion batteries @article{Zhang2021RecentPI, title={Recent progress in flame-retardant separators for safe lithium-ion batteries}, author={Xingyi Zhang and Qingwei Sun and Cheng Zhen and Ying-Hua Niu and Yupei Han and Guangfeng Zeng and Dongjiang Chen
Herein, three electrolyte-insoluble brominated flame retardants (BFRs) are selected and coated on both sides of commercial polypropylene separators by a facile slurry
Developing an optimal multifunctional flame-retardant separator is crucial for enhancing lithium metal battery (LMB) safety. However, this task poses challenges due to the inferior electrochemical stability and limited ion transport of most fire retardant-based coatings. In this work, the core–shell structured flame-retardant matrix is
DOI: 10.1021/acsapm.2c00645 Corpus ID: 249720370; Flame-Retardant Nano-TiO2/Polyimide Composite Separator for the Safety of a Lithium-Ion Battery @article{Gao2022FlameRetardantNC, title={Flame-Retardant Nano-TiO2/Polyimide Composite Separator for the Safety of a Lithium-Ion Battery}, author={Xing Gao and Lei Sheng and
A "sandwich" separator (SPS-B) is designed by integrating silk fibroin (SF), decabromodiphenyl ethane, and polyvinyl alcohol through electrospinning. SPS-B shows excellent flame-retardant properties through a free radical trapping mechanism. Moreover, the SPS-B demonstrated satisfactory capability of suppressing lithium dendrites
The safety of lithium-ion batteries (LIBs) is paramount for all users. One effective way to improve safety is incorporating heat-resistant polyimide (PI) separators, which can increase the thermal stability of batteries
The LiCoO 2 /Li battery based on 5.0-TiO 2 @PI nanofiber separator has a higher discharge capacity even at a current density of 4 C, which is better than that of PE separator. The use of this 5.0-TiO 2 @PI nanofiber separator has enlightening significance for the safety of high energy density batteries.
Herein, we design a green, cellulose-based separator (Cel@DBDPE) with a unique encapsulation structure for lithium-ion batteries, in which functional flame retardants (DBDPE) are wrapped in microscrolls formed by the self
Herein, we design a green, cellulose-based separator (Cel@DBDPE) with a unique encapsulation structure for lithium-ion batteries, in which functional flame retardants (DBDPE) are wrapped in microscrolls formed by the self-rolling of 2D cellulose nanosheets upon freeze-drying. This structure can firmly anchor DBDPE particles in the separator to prevent them from undergoing
Considerable efforts have been devoted to solving this problem, such as by replacing the existing flammable electrolyte with nonflammable ones (12–19) or using flame-retardant separators (20–22), detecting the dendrite via a smart separator for early warning, coating the separator with a ceramic layer (24–26), thermal-switching the current collector, and autonomic shutdown of
The LiCoO 2 /Li battery based on 5.0-TiO 2 @PI nanofiber separator has a higher discharge capacity even at a current density of 4 C, which is better than that of PE separator. The use of this 5.0-TiO 2 @PI nanofiber
Organic flame-retardant-loaded battery separator offers a new opportunity for battery safety. However, its poor thermal stability still poses serious safety issues. Inspired by Tai Chi, an "internal-cultivating and external
Safety is an important part in the use of lithium-ion battery. This paper proposes a coaxial electrospinning method for preparing a flame-retardant lithium-ion battery of triphenyl phosphate (TPP) and polyvinylidene fluoride (PVDF) to prevent the battery from burning. For performance comparison, PVDF and TPP separators with different mass ratios were prepared by coaxial
Organic flame-retardant-loaded battery separator offers a new opportunity for battery safety. However, its poor thermal stability still poses serious safety issues. Inspired by Tai Chi, an "internal-cultivating and external-practicing" core–shell nanofibrous membrane was prepared by coaxial electrospinning, wherein the shell
This review summarizes recent processes on both flame-retardant separators for liquid lithium-ion batteries including inorganic particle blended polymer separators, ceramic material coated separators, inherently nonflammable separators and separators with flame-retardant additives, and all-solid-state electrolytes including inorganic solid
Our results demonstrate that FCCN separator is a very promising separator to significantly improve the safety issue of LIB owing to its good flame retardancy, superior thermal stability and...
The flame retardant separator exhibites complete non-combustibility after ignition (Fig. 23). Using this separator, the lithium-sulfur battery delivers a reversible capacity of 1274 mA·h/g at 0.2 C and a capacity 637 mA·h/g at 5 C. Moreover, the separator is flame-retardant and thermal-stable without obvious shrinkage even at 300°C.
The detrimental shuttle effect of lithium polysulfides (LiPSs) and the combustible features of commercial separators have hindered the practical application of lithium–sulfur (Li–S) batteries. Herein, a robust flame retardant fluorinated polyimide (F/PI) nanofiber separator has been designed for high-tempera
Our results demonstrate that FCCN separator is a very promising separator to significantly improve the safety issue of LIB owing to its good flame retardancy, superior
In other words, these strategies have to make a trade-off between flame retardancy and the electrochemical performance of batteries. In contrast, introducing a flame-retardant function into the separator is a preferable and facile strategy.
For battery flame retardant separators, in addition to various silicate minerals, metal oxides are also a good choice.
Traditional flame retardant polymer materials can be used in the flame retardant battery, in order to meet the concept of green and renewable, the use of bio-based materials in battery flame retardant separators is a very important research direction for separator flame retardant technology.
In contrast, introducing a flame-retardant function into the separator is a preferable and facile strategy. This is because the separator, as an “inert” internal component of the battery, does not participate in the chemical reaction process of the battery and has little direct influence on battery performance.
The battery consists of electrolyte, separator, electrode and shell, the traditional flame retardant method of battery is to modify the components to improve its flame safety.
Up to now, the flame retardant research of polymer separators has a fairly good foundation. For polymer flame retardant separators, the research and development of bulk flame retardant separators and bio-based flame retardant separators will become the focus of future research.
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