نتایج جستجو برای: polymer electrolyte

تعداد نتایج: 116645  

2014
Nurul Nadiah Sa'adun Ramesh Subramaniam Ramesh Kasi

Gel polymer electrolytes (GPEs) are developed using poly(1-vinylpyrrolidone-co-vinyl acetate) [P(VP-co-VAc)] as the host polymer, lithium bis(trifluoromethane) sulfonimide [LiTFSI] as the lithium salt and ionic liquid, and 1-ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl) imide [EMImTFSI] by using solution casting technique. The effect of ionic liquid on ionic conductivity is studied and...

2016
Merhawi Abreha Gebreyesus Y. Purushotham J.Siva Kumar

Ion conducting polymer electrolytes composed of poly(vinylidene fluoride-co-hexafluoropropylene) (PVdF-HFP), poly(methyl methacrylate) (PMMA) and lithium triflate (LiTf) were prepared using the solution casting method. Structural change and complex formation in the blend electrolyte systems were confirmed from the X-ray diffraction (XRD), Fourier transform infrared (FTIR) spectroscopy and scann...

Journal: :Nanoscale 2014
Ming-Che Yang Hsun-Wei Cho Jih-Jen Wu

In this work, photovoltachromic cells (PVCCs) are fabricated using a solvent-free polyethylene glycol (PEG)-titanium hybrid polymer electrolyte. With appropriate addition of 1,2-dimethyl-3-propylimidazolium iodide in the electrolyte, the range of tunable colored-state transmittance of the PVCC is enlarged due to an improved fill factor. A transmittance modulation larger than 40% can be maintain...

Journal: :journal of physical and theoretical chemistry 0
mohammad yari not-mentioned sajjad sedaghat sherehjini not-mentioned

the electrocatalysis of the oxygen reduction reaction (orr) on carbon supportedpt-v (1:1) catalyst in polymer electrolyte fuel cells (pefc) was investigated. atan oxygen pressure of one atm an enhanced electrocatalytic property of pt-v/ccompared with pt/c is revealed. these results indicate the occurrence of adifferent electrocatalytic mechanism for the orr on pt/c and pt-v/c. anincrease of mas...

2013
Xiaoteng Liu Paul A. Christensen Stephen M. Kelly Vincent Rocher Keith Scott

Reformate gas, a commonly employed fuel for polymer electrolyte membrane fuel cells (PEMFCs), contains carbon monoxide, which poisons Pt-containing anodes in such devices. A novel, low-cost mesoporous Si3N4 selective gas separation material was tested as a hydrogen clean-up membrane to remove CO from simulated feed gas to single-cell PEMFC, employing Nafion as the polymer electrolyte membrane. ...

2006
P. Brault S. Roualdès A. Caillard A.-L. Thomann J. Mathias J. Durand C. Coutanceau J.-M. Léger R. Boswell

In this review, we report on the use of low pressure plasmas for elaborating materials at the heart of solid polymer fuel cells (SPFC), especially electrodes and the membrane electrolyte. Electrodes are formed using plasma sputtering techniques while the ion conducting membranes are built up using plasma polymerization. Fuel cell performance will be improved by these approaches. The electrode c...

2009
Takahiro Ohkubo Koh Kidena Akihiro Ohira

We investigated the time-dependent self-diffusion coefficients of water, , in polymer electrolyte membranes at 278 K. The was measured from 0.7 to 100 ms by field gradient NMR techniques. The results showed that the self-diffusion coefficients of water were dependent on less than 2 ms due to restricted diffusion, and were constant beyond 3 ms. The tortuosity and surface-to-volume ratio related ...

2003
Patric Jannasch

Progress in the area of proton conducting polymer electrolyte membranes is intimately linked with the development of polymer electrolyte membrane fuel cells, and is today largely driven by the insufficient properties of humidified Nafion membranes at temperatures above 100 8C. Recent developments in the field include new ionomers and hybrid membranes containing inorganic nanoparticles to contro...

2014
Jun Feng Yaqin Huang Zhengkai Tu Haining Zhang Mu Pan Haolin Tang

Proton conducting materials having reasonable proton conductivity at low humidification conditions are critical for decrease in system complexity and improvement of power density for polymer electrolyte membrane fuel cells. This study shows that polyelectrolyte brushes on titanate nanotubes formed through surface-initiated free radical polymerization exhibit less humidity-dependent proton condu...

Journal: :Archives of disease in childhood 1982
B K Sandhu B J Jones C G Brook D B Silk

Seven infants with mild acute diarrhoeal dehydration were rehydrated with an oral sugar-electrolyte solution containing a glucose polymer mixture. Six of them were rehydrated successfully. The high sodium content of the solution (90 mmol/l) was based on the WHO/UNICEF recommended glucose-electrolyte solution and was implicated as the cause of increases in serum sodium in 4 infants, one of whom ...

نمودار تعداد نتایج جستجو در هر سال

با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید