scholarly journals Proton Conductivity in Chitin System

2021 ◽  
Author(s):  
Takashi Kawabata
Keyword(s):  
Fuel Cells ◽  
Proton Conductivity ◽  
Proton Conductor ◽  
Proton Conduction ◽  
Water Molecules ◽  
Environmental Load ◽  
Utility Value ◽  
Electrolyte Membrane ◽  
Marine Product ◽  
Insight Into

We have created and researched fuel cells using biomaterials as next-generation low-environmental-load energy. As is well known, chitin is a biomass that is discharged in large quantities as a marine product processing waste. We have focused on the chitin and have been studying the production of fuel cells and proton conductivity using it. It was revealed that chitin can be used as an electrolyte membrane for fuel cells under humidified conditions and becomes a proton conductor. It was found that the presence of water molecules is important for the appearance of proton conduction in chitin system. This study presents the utility value of chitin in new fields and provides insight into the proton conduction mechanism of chitin-based biomaterials.

scholarly journals Arrangement of water molecules and high proton conductivity of tunnel structure phosphates, KMg1−xH2x(PO3)3·yH2O

RSC Advances ◽  
2020 ◽  
Vol 10 (13) ◽  
pp. 7803-7811 ◽  
Author(s):  
Yasuaki Matsuda ◽  
Kousei Funakoshi ◽  
Ryosuke Sebe ◽  
Genki Kobayashi ◽  
Masao Yonemura ◽  
...  
Keyword(s):  
Proton Conductivity ◽  
Gas Flow ◽  
Proton Conductor ◽  
Water Molecules ◽  
Tunnel Structure ◽  
Fast Proton ◽  
High Proton Conductivity ◽  
High Proton ◽  
Ar Gas

A fast proton conductor exhibiting high proton conductivity of 7.0 × 10−3 S cm−1 at 200 °C in a dry Ar gas flow was developed by designing water chains in a rigid tunnel framework.

Polymer based Membrane Electrospun Fiber in Fuel Cell Application: A Short Review

2014 ◽  
Vol 69 (9) ◽  
Author(s):  
Hazlina Junoh ◽  
Juhana Jaafar ◽  
M. H. D. Othman ◽  
Mukhlis A. Rahman
Keyword(s):  
Renewable Energy ◽  
Fuel Cells ◽  
Fuel Cell ◽  
Proton Conductivity ◽  
Electrospun Fiber ◽  
Renewable Energy Sources ◽  
Proton Exchange ◽  
Nanocomposite Membrane ◽  
Electrolyte Membrane ◽  
Fuel Cell Application

usage which contributes to the environmental issues. Among the type of existing renewable energy, fuel cells is the most promising renewable energy sources since the energy can be directly converted from combustible of fuel. The proton exchange membrane (PEM) is the heart of the fuel cells system. The research and development on proton electrolyte membrane is keep burgeoned. Even though the studies of the electrolyte nanocomposite membrane for fuel cell application are quite various but only a few studies focused on the effect of electrospun nanocomposite membrane on the performance of proton electrolyte membrane. This review is focusing on the electrospinning process for the preparation of electrospun fiber membrane. This review is concentrates on polymer based membrane electrospun nanofiber and their influence on proton conductivity as well as on fuel crossover barrier properties. The proton conductivity and fuel crossover can be improved by fully exfoliated structure of nanocomposite electrolyte membrane via electropinning process and thus the membrane can be an alternative PEM for DMFC applications.

Suppression of methanol cross-over in novel composite membranes for direct methanol fuel cells

2009 ◽  
Vol 81 (12) ◽  
pp. 2309-2316 ◽  
Author(s):  
Yong Fang ◽  
Ruiying Miao ◽  
Tongtao Wang ◽  
Xindong Wang
Keyword(s):  
Fuel Cells ◽  
Proton Conductivity ◽  
Direct Methanol Fuel Cells ◽  
Base Material ◽  
Proton Conductor ◽  
Composite Membranes ◽  
Methanol Permeability ◽  
Poly Vinyl Alcohol ◽  
Direct Methanol ◽  
Methanol Fuel Cells

A series of novel composite membranes was prepared by using poly(vinyl alcohol) (PVA) with polyimide (PI) as base material and 8-trimethoxysilylpropyl glycerine ether-1,3,6-pyrenetrisulfonic acid (TSGEPS) as proton conductor for direct methanol fuel cells (DMFCs). The parameters of membranes, including water sorption, hydrolysis stability, dimensional stability, proton conductivity, and methanol permeability were studied. The proton conductivity of the membranes is in the order of 10–2 S/cm, and the membranes show better resistance to methanol permeability (1.51 × 10–7 cm2 s–1) and better selectivity (20.6 × 104 S cm–3 s) than those of Nafion115 under the same measurement conditions.

Solid Proton Conductor Based on Natural Diatomite

2011 ◽  
Vol 675-677 ◽  
pp. 49-52 ◽  
Author(s):  
Bo Wang
Keyword(s):  
Fuel Cells ◽  
Proton Conductivity ◽  
Gas Sensors ◽  
Room Temperature ◽  
Complex Impedance ◽  
Proton Conductor ◽  
Proton Conductors ◽  
Ph Sensors ◽  
Humidity Sensors ◽  
Impedance Technique

Proton conductivity of the natural diatomite was studied by AC complex impedance technique. At room temperature, the highest proton conductivity was found to be 4.5　10-7 S·cm-1. By hydrating the diatomite, the proton conductivity was increased by two orders of magnitude. The room temperate proton conductivity of the hydrated diatomite (5.5　10-5 S·cm-1) was comparable to other hydrated solid proton conductors. Based on these results, the natural diatomite could be used as solid proton conductor for various electrochemical applications such as fuel cells, gas sensors, humidity sensors, and pH sensors.

Synthesis and optimization of nanocomposite membranes based on SPEEK and perovskite nanoparticles for polymer electrolyte membrane fuel cells

2019 ◽  
Vol 43 (41) ◽  
pp. 16232-16245 ◽  
Author(s):  
Parisa Hosseinabadi ◽  
Khadijeh Hooshyari ◽  
Mehran Javanbakht ◽  
Morteza Enhessari
Keyword(s):  
Fuel Cells ◽  
Proton Exchange Membrane ◽  
Polymer Electrolyte Membrane ◽  
Proton Conductor ◽  
Proton Exchange ◽  
Electrolyte Membrane ◽  
Poly Ether Ether Ketone ◽  
Perovskite Material ◽  
Perovskite Nanoparticles ◽  
Exchange Membrane

The addition of BaZr0.9Y0.1O3−δ (BZY10) nanoparticles as a perovskite material with a proton conductor oxide structure to enhance the performance of sulfonated poly(ether ether ketone) (SPEEK) in proton exchange membrane fuel cells (PEMFCs) has been investigated in this work.

Polymer Electrolyte Membranes

2019 ◽  
Vol 23 ◽  
pp. 82-89
Author(s):  
Ponnusamy Senthil Kumar ◽  
C. Femina Carolin
Keyword(s):  
Fuel Cells ◽  
Polymer Electrolyte ◽  
Proton Conductivity ◽  
Chemical Structure ◽  
Polymer Electrolyte Membrane ◽  
Polymer Electrolyte Membranes ◽  
Electrolyte Membrane ◽  
Chemical Structures ◽  
Different Types ◽  
Electrolyte Membranes

Polymer electrolyte membranes (PEM) with good properties are essential for the improvement of electrochemical operations. The increase in properties of polymer electrolyte membranes will develop the performance of polymer electrolyte membranes in the fuel cells. The importance of polymer electrolyte membranes is increasing recently due to its activity and simplicity in energy associated applications like automobiles and various portable applications. PEM has various properties like proton conductivity, chemical stability, mechanical properties, thermal stability and so on. These properties are enhanced and influenced by various factors like morphology, the molecular weight of the membranes, chemical structures, cross linkages etc. The present chapter attempts to summarize about the properties of polymer electrolyte membrane involved in the different types of electrochemical utilizations. Keywords: Polymer electrolyte membrane, fuel cells, morphology, proton conductivity, chemical structure.

The Development of Novel Electrolyte Membrane with High Proton Conductivity at Medium Temperatures

2012 ◽  
Vol 472-475 ◽  
pp. 2819-2823
Author(s):  
Xue Dan Wang ◽  
Le Bin Yang ◽  
Jia Bin Liu ◽  
Yue Xiang Huang ◽  
Hang Yan Shen ◽  
...  
Keyword(s):  
Phase Transition ◽  
Transition Temperature ◽  
Proton Conductivity ◽  
Chemical Stability ◽  
Wide Temperature Range ◽  
Proton Conductor ◽  
Dramatic Improvement ◽  
High Proton Conductivity ◽  
Electrolyte Membrane ◽  
High Proton

A novel electrolyte membrane PVDF-Al2O3-CsHSO4 usable at medium temperatures was prepared by composite of PVDF and an inorganic proton conductor Al2O3-CsHSO4. The membrane has a steep increase in proton conductivity around 90°C and retains the high conductivity, about 10-3 S•cm-1, up to 200°C. The incorporation of Al2O3-CsHSO4 with PVDF leads to a dramatic improvement of the properties of PVDF, including widen the phase transition temperature of CsHSO4, improve proton conductivity and enhance chemical stability over wide temperature range.

Structural features of proton-conducting metal organic and covalent organic frameworks

CrystEngComm ◽  
2020 ◽  
Vol 22 (39) ◽  
pp. 6425-6443
Author(s):  
Pampa Jhariat ◽  
Priyanka Kumari ◽  
Tamas Panda
Keyword(s):  
Fuel Cells ◽  
Proton Conductivity ◽  
Proton Exchange Membrane ◽  
Structural Features ◽  
Proton Conduction ◽  
Proton Exchange ◽  
Covalent Organic Frameworks ◽  
Short Overview ◽  
Metal Organic ◽  
Exchange Membrane

Proton conductivity in MOFs and COFs have been attracted due to their applicability as electrolytes in proton exchange membrane fuel cells. A short overview with recent updates on the structural features of MOFs and COFs for proton conduction are presented here.

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