A functional binder–sulfonated poly(ether ether ketone) for sulfur cathode of Li–S batteries

RSC Advances ◽  
2016 ◽  
Vol 6 (81) ◽  
pp. 77937-77943 ◽  
Author(s):  
Meng Cheng ◽  
Longyan Li ◽  
Yanxiao Chen ◽  
Xiaodong Guo ◽  
Benhe Zhong
Keyword(s):  
Polyvinylidene Fluoride ◽  
Homogeneous Reaction ◽  
Sulfur Cathode ◽  
Adhesion Ability ◽  
Ether Ether Ketone ◽  
Poly Ether Ether Ketone ◽  
Ether Ketone ◽  
Sulfonated Poly

Sulfonated poly(ether ether ketone) (SPEEK) with strong electronegativity and adhesion ability of S/C compounds was prepared by a homogeneous reaction as the binder for the sulfur cathode of Li–S batteries compared to the conventional polyvinylidene fluoride (PVDF) binder.

scholarly journals High degree sulfonated poly(ether ether ketone) blend with polyvinylidene fluoride as a potential proton-conducting membrane fuel cell

2019 ◽  
Vol 32 (1) ◽  
pp. 103-115 ◽  
Author(s):  
Syarifah Noor Syakiylla Sayed Daud ◽  
Muhammad Noorul Anam Mohd Norddin ◽  
Juhana Jaafar ◽  
Rubita Sudirman
Keyword(s):  
Mechanical Properties ◽  
Fuel Cell ◽  
Polyvinylidene Fluoride ◽  
Proton Conducting ◽  
Proton Conducting Membrane ◽  
Ether Ether Ketone ◽  
Poly Ether Ether Ketone ◽  
Ether Ketone ◽  
Speek Membrane ◽  
Sulfonated Poly

Sulfonated poly(ether ether ketone) (sPEEK) membrane is a promising proton-conducting membrane for fuel cell. However, the performance and lifetime of sPEEK membrane depend on the degree of sulfonation (DS). High DS of sPEEK increases the performance, but the mechanical properties could deteriorate progressively which affect its lifetime. Thus, this study investigated the effect of adding polyvinylidene fluoride (PVDF) into high DS (80%) of sPEEK through solution blending method toward its physicochemical properties and morphology structures. The PVDF concentration was varied to 5, 10, 15, and 20 wt% relative to the sPEEK content. The existence of hydrophobic PVDF in 80% sPEEK improved the mechanical properties where the water uptake and swelling degree of membrane decreased, whereas the tensile strength increased. The sPEEK/PVDF 15 exhibited the highest proton conductivity (46.23 mS cm−1) at 80°C. Incorporating PVDF into high DS of sPEEK enhanced the mechanical properties which can be used as a proton-conducting membrane for fuel cell that may improve the performance and prolong the lifetime of the cell.

scholarly journals Effect of Sulfonation Degree and PVDF Content on the Structure and Transport Properties of SPEEK/PVDF Blend Membranes

Polymers ◽  
2019 ◽  
Vol 11 (4) ◽  
pp. 676
Author(s):  
Shaojian He ◽  
Shaoxiong Zhai ◽  
Chong Zhang ◽  
Yang Xue ◽  
Wei Yang ◽  
...  
Keyword(s):  
Transport Properties ◽  
Polyvinylidene Fluoride ◽  
Methanol Permeability ◽  
Miscible Blend ◽  
Ether Ether Ketone ◽  
Sulfonation Degree ◽  
Poly Ether Ether Ketone ◽  
Blend Membranes ◽  
Ether Ketone ◽  
Sulfonated Poly

Sulfonated poly (ether ether ketone) (SPEEK) with four different sulfonation degrees (SDs) were prepared, and mixed with polyvinylidene fluoride (PVDF) to prepare four series of SPEEK/PVDF blend membranes. The miscibility between SPEEK and PVDF was investigated by observing the micro-morphologies. The miscible blend membranes were found in the SPEEK/PVDF blend membranes in which either SPEEK had relatively low SD or consisted of low content of one component (either SPEEK or PVDF). The PVDF crystallinity was found to decrease in the SPEEK/PVDF membranes that had better blend miscibility. With the increase of PVDF content, all the blend membranes exhibited the decreased proton conductivity and methanol permeability, and the miscible blend membranes decreased more slowly than the immiscible ones.

scholarly journals Effect of sulfonated poly (ether ether ketone) on the sensitivity of polyvinylidene fluoride-based resistive humidity sensors

2020 ◽  
Vol 25 ◽  
pp. 101601
Author(s):  
Shoaib Mallick ◽  
Zubair Ahmad ◽  
Abubaker Eribi ◽  
Hemalatha Parangusan ◽  
Jolly Bhadra ◽  
...  
Keyword(s):  
Polyvinylidene Fluoride ◽  
Humidity Sensors ◽  
Ether Ether Ketone ◽  
Poly Ether Ether Ketone ◽  
Ether Ketone ◽  
Sulfonated Poly

Ternary hybrid (SPEEK/SPVdF-HFP/GO) based membrane electrolyte for the applications of fuel cells: profile of improved mechanical strength, thermal stability and proton conductivity

RSC Advances ◽  
2016 ◽  
Vol 6 (110) ◽  
pp. 108851-108863 ◽  
Author(s):  
Mohanraj Vinothkannan ◽  
Ae Rhan Kim ◽  
Kee Suk Nahm ◽  
Dong Jin Yoo
Keyword(s):  
Thermal Stability ◽  
Polyvinylidene Fluoride ◽  
Hybrid Membranes ◽  
Solution Casting ◽  
Casting Method ◽  
Ether Ether Ketone ◽  
Poly Ether Ether Ketone ◽  
Solution Casting Method ◽  
Ether Ketone ◽  
Sulfonated Poly

Ternary hybrid membranes composed of sulfonated (poly ether ether ketone) (SPEEK), sulfonated polyvinylidene fluoride-co-hexafluoropropylene (SPVdF-HFP) and 1, 3, 5 or 7 wt% graphene oxide (GO) were fabricated using a facile solution casting method.

Sign in / Sign up

Export Citation Format

Share Document