Studies on cross-linked polyurethane acrylate-based electrolyte consisting of reactive vinyl/divinyl diluents

Digar, Mohanlal; Hung, Shiue-Liang; Wen, Ten‐Chin; Gopalan, A.

doi:10.1016/s0032-3861(01)00737-6

Cited by 40 publications

(29 citation statements)

References 23 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…18 Compared with the room temperature conductivity, around 1 ϫ 10 Ϫ2 S/cm, of EC/DMC/LiPF 6 liquid electrolytes, conductivity of pure PEGDA film was below 1 ϫ 10 Ϫ3 S/cm until the temperature reached about 60°C, but that of PEGDA/PVdF ͑1/2͒ film was as high as ca. 4 ϫ 10 Ϫ3 S/cm at ambient temperature and close to PVdF-HFP gel film.…”

Section: Resultsmentioning

confidence: 94%

Thermally Stable Gel Polymer Electrolytes

Song

Kim

et al. 2003

J. Electrochem. Soc.

View full text Add to dashboard Cite

To prepare miscible polyethylene glycol diacrylate/polyvinylidene fluoride (PEGDA/PVdF) blend gel polymer electrolytes, low molecular weight false(M=742false) liquid PEGDA oligomer was mixed with PVdF-HFP dissolved in ethylene carbonate/dimethyl carbonate/ LiPF6 liquid electrolytes, and then cured under ultraviolet irradiation. Room temperature conductivity of PEGDA/PVdF blend films was found to be comparable to that of PVdF-HFP gel polymer electrolytes, and they were electrochemically stable up to 4.6 V vs. normalLi/Li+. Scanning electron micrographs revealed that PEGDA/PVdF blend electrolytes have pore size intermediate between dense PEGDA and highly porous PVdF-HFP. It was confirmed by weight change measurement that liquid electrolyte was likely to evaporate through large pores in PVdF-HFP at 80°C, while PEGDA/PVdF blend showed better liquid electrolyte retention ability. This result was in good agreement with more stable interfacial properties of PEGDA/PVdF blend at 80°C in ac impedance analysis. Consequently, both PVdF-HFP and PEGDA/PVdF gel polymer electrolytes delivered similar discharge capacity at room temperature, but PEGDA/PVdF blend gel polymer electrolyte showed much better cycle performance than pure PVdF-HFP at 80°C. © 2003 The Electrochemical Society. All rights reserved.

show abstract

Section: Resultsmentioning

confidence: 94%

Thermally Stable Gel Polymer Electrolytes

Song

Kim

et al. 2003

J. Electrochem. Soc.

View full text Add to dashboard Cite

show abstract

“…Thermoplastic polyurethane (TPU) contains two-phase microstructure which are soft segments and hard segments. [9][10][11] The hard sections are incompatible with the soft section in thermodynamics, while these two phases are interconnected throughout each other. The whole system benefits from these two phases since that the hard parts afford spatial stability and the soft phases are conducive to good ionic conductivity owing to the soft segments don't form ionic cluster after being dissolved alkali metal salt.…”

Section: Introductionmentioning

confidence: 99%

A novel high-performance electrospun Thermoplastic polyurethane/Poly(vinylidene fluoride)/Polystyrene gel polymer electrolyte for lithium batteries

Deng¹,

He²,

Cao³

et al. 2017

ACSi

View full text Add to dashboard Cite

A novel high-performance gel polymer electrolyte (GPE) based on poly(vinylidene fluoride) (PVDF), thermoplastic polyurethane (TPU) and polystyrene (PS) has been prepared. Its characteristics are investigated by scanning electron microscopy (SEM), thermal analysis (DSC), universal testing machines (UTM), galvanostatic charge-discharge and electrochemical impedance spectroscopy. The GPE based on TPU/PVDF/PS (10 wt.%) show a high ionic conductivity of 5.28 × 10 -3 S cm -1 with the electrochemical stability window of 5.0 V. In addition, its first charge-discharge capacity reached to 169.5 mAh g -1 , high mechanical strength and stability to allow safe operation in rechargeable lithium ion polymer batteries.

show abstract

“…The advantages of polymer electrolyte are their elasticity, ease of processing into thin films of large surface area, electrochemical stability and leak-proof nature which make it applicable for batteries, fuel cells, supercapacitors, electrocromic devices and chemical sensors [1]. An excellent polymer electrolyte should have a low degree of crystallinity, while a good mechanical property should be maintained for practical applications and ease of film fabrication [2] During the formation of polyurethane, diisocyanate crosslinks with polyether monomer to form a segmented polymer having a general structure (A-B) n , where B is the soft segment that formed from one or more of polyether or polyester polyol and A is the hard segment formed by extending a diisocyanate with low molecular weight diol or diamine [3]. Single step polymerization of polyurethane gives off an extreme amount of heat while forming urethane bond and might caused shrinkage problem.…”

Section: Introductionmentioning

confidence: 99%