Enhancement of electrochemical and thermal properties of polyethylene separators coated with polyvinylidene fluoride–hexafluoropropylene co-polymer for Li-ion batteries

Kim, Ki Jae; Kim, Jae‐Hun; Park, Min; Kwon, Hyuk‐Kwon; Kim, Hansu; Kim, Young‐Jun

doi:10.1016/j.jpowsour.2011.09.086

Cited by 111 publications

(57 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…(2): where is the ionic conductivity, A is the pre-exponential factor, Ea is the activation energy of ion conduction in the GPE, R is the gas constant (R = 8.314 J K −1 mol −1 ) and T is the temperature (K). From the Arrhenius relationship, the activation energy for the GPE is found to be 23 kJ mol −1 , which is consistent with most reported polymer electrolytes [9]. The formation of a stable solid electrolyte interface on the lithium metal that can conduct Li + ions freely and prevent any undesirable interaction between the electrolyte and lithium leading to lithium dendrites is essential for obtaining excellent electrochemical performances.…”

Section: Electrochemical Performances Of the Gpesupporting

confidence: 83%

“…Among a wide variety of polymer electrolyte candidates investigated so far, gel polymer electrolytes (GPEs), which are composed of a liquid electrolyte and a polymer matrix, have triggered considerable attention because of their unique soft matter characteristics such as excellent electrolyte uptake, good ionic conductivity and electrolyte leakage-proof [7][8][9]. While, the GPEs do not offer a satisfactory level of mechanical properties due to their excessively plastic and liquid-like behavior at room temperature.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Compliant gel polymer electrolyte based on poly(methyl acrylate-co-acrylonitrile)/poly(vinyl alcohol) for flexible lithium-ion batteries

Huang

Gao³

et al. 2014

Electrochimica Acta

View full text Add to dashboard Cite

Section: Electrochemical Performances Of the Gpesupporting

confidence: 83%

Section: Introductionmentioning

confidence: 99%

Compliant gel polymer electrolyte based on poly(methyl acrylate-co-acrylonitrile)/poly(vinyl alcohol) for flexible lithium-ion batteries

Huang

Gao³

et al. 2014

Electrochimica Acta

View full text Add to dashboard Cite

“…To modify the interface properties between the support PE separator and coated material, Kim et al [34] have used gamma ray irradiation to treat the PE separator before coating the gel polymer electrolyte (PVDF-12% HFP). To modify the interface properties between the support PE separator and coated material, Kim et al [34] have used gamma ray irradiation to treat the PE separator before coating the gel polymer electrolyte (PVDF-12% HFP).…”

Section: Surface Coatingmentioning

confidence: 99%

Progress in polymeric separators for lithium ion batteries

2015

View full text Add to dashboard Cite

This paper reviews the recent developments and the characteristics of polymeric separators used for lithium ion batteries. According to the structure and composition of the separators, they are broadly divided into four types: (1) polyolefin microporous separator, (2) heterochain polymer microporous separator, (3) polymer electrolyte and (4) non-woven separator. Specially, polymer electrolyte was defined as one category of separators for the convenient description in this review, which features intermediate between the two electrodes and possesses transport properties comparable with the separaor in liquid LIB. For each category, the structure, characteristics, modification, and performance of separators are described. Finally, the guidelines for further improvements in this research are outlined.

show abstract

“…[36][37][38] Hot oven test was conducted for MPP separator, polypropylene nonwoven and PSAP separator for 1 h storage. As shown in Figure 3a, PSAP separator exhibited negligible thermal shrinkage than the MPP separator over a wider range of temperatures from 100…”

Section: -35mentioning

confidence: 99%

A Heat Resistant and Flame-Retardant Polysulfonamide/Polypropylene Composite Nonwoven for High Performance Lithium Ion Battery Separator

Zhang

Liu

et al. 2014

J. Electrochem. Soc.

View full text Add to dashboard Cite

A heat resistant and flame-retardant polysulfonamide/polypropylene composite nonwoven has been developed and exploited as an advanced separator for high performance lithium ion battery via melt-blown spinning followed by a phase-inversion process. It was manifested that such composite nonwoven exhibited improved flame retardance, superior thermal resistance and better electrolyte wettability as compared to commercialized polypropylene separator. It was also demonstrated that the lithium cobalt oxide (LiCoO 2 )/graphite cells employing the composite separator possessed better rate capability and superior cycling stability than those of polypropylene separator. Furthermore, this study verified the beneficial impact of polysulfonamide/polypropylene composite separator with respect to commercial polypropylene separator on cycle performance of lithium iron phosphate (LiFePO 4 )/lithium (Li) cells even at an elevated temperature of 120 • C. These fascinating results suggest that such composite nonwoven is promising separator for high performance lithium ion battery. Lithium ion battery (LIB) is considered to be the most promising technology for electric vehicles and energy storage systems due to its high-energy density, high-specific energy, low self-discharge rate, and long lifetime cycle.1-5 Among the components in lithium ion battery, the separator is a critical component for battery performance and also crucial for battery safety. The separator separates positive electrode and negative electrode while permitting the rapid diffusion of lithium ions through electrolyte.6,7 Microporous polyolefin-based separators, such as polyethylene and polypropylene membranes, have been commercially used as major separators for LIB because of satisfactory mechanical property, excellent chemical stability and good thermal shutdown properties. [8][9][10] The thermal shutdown property of the microporous separators could cut off the thermal runaway at the shutdown temperature.6 However, the microporous polyolefin separators often suffered from severe thermal shrinkage above melting temperature when the elevated temperature kept a little long time, which could cause direct contact between cathode and anode and finally result in short circuit of lithium battery.11 Meanwhile, the microporous polyolefin separators have been proven to cause poor electrolyte wettability problems, which lead to an increase in cell resistance and would restrict the battery performance.12,13 Tremendous efforts have been made to improve the overall properties of commercial polyolefin separators.14-17 One strategy was to incorporate inorganic nanoparticles into microporous polyethylene membrane (PE) or polypropylene membrane (PP) and the other one was to coat high performance polymers onto commercial separator surface. As a matter of fact, ceramic nanoparticles coating suffered from insufficient adhesion to polymer matrix, which could lead to the particles detached from separators' surface and generate a non-uniform current density across the electrodes during c...

show abstract

Enhancement of electrochemical and thermal properties of polyethylene separators coated with polyvinylidene fluoride–hexafluoropropylene co-polymer for Li-ion batteries

Cited by 111 publications

References 17 publications

Compliant gel polymer electrolyte based on poly(methyl acrylate-co-acrylonitrile)/poly(vinyl alcohol) for flexible lithium-ion batteries

Compliant gel polymer electrolyte based on poly(methyl acrylate-co-acrylonitrile)/poly(vinyl alcohol) for flexible lithium-ion batteries

Progress in polymeric separators for lithium ion batteries

A Heat Resistant and Flame-Retardant Polysulfonamide/Polypropylene Composite Nonwoven for High Performance Lithium Ion Battery Separator

Contact Info

Product

Resources

About