scholarly journals Preparation and performance study of a PVDF–LATP ceramic composite polymer electrolyte membrane for solid-state batteries

RSC Advances ◽  
2018 ◽  
Vol 8 (71) ◽  
pp. 40498-40504 ◽  
Author(s):  
Xinghua Liang ◽  
Di Han ◽  
Yunting Wang ◽  
Lingxiao Lan ◽  
Jie Mao
Keyword(s):  
Ceramic Composite ◽  
Organic Liquid ◽  
Polymer Electrolyte Membrane ◽  
Composite Polymer Electrolyte ◽  
Performance Study ◽  
Safety Issues ◽  
Electrolyte Membrane ◽  
Wide Range ◽  
Solid State Batteries ◽  
And Performance

Recently, safety issues in conventional organic liquid electrolytes and the interface resistance between the electrode and electrolyte have been the most challenging barriers for the expansion of lithium batteries to a wide range of applications.

Current Distribution in a Polymer Electrolyte Membrane Fuel Cell Under Flooding Conditions

2009 ◽  
Author(s):  
A. Jamekhorshid ◽  
G. Karimi ◽  
X. Li
Keyword(s):  
Fuel Cell ◽  
Polymer Electrolyte ◽  
Current Distribution ◽  
Current Density ◽  
Polymer Electrolyte Membrane ◽  
Operating Conditions ◽  
Average Current Density ◽  
Electrolyte Membrane ◽  
Wide Range ◽  
Average Current

Non-uniform current distribution in polymer electrolyte membrane fuel cells results in local over-heating, accelerated ageing, and lower power output than expected. This issue is very critical when fuel cell experiences water flooding. In this work, the performance of a PEM fuel cell is investigated under cathode flooding conditions. A partially flooded GDL model is proposed to study local current density distributions along flow fields over a wide range of cell operating conditions. The model results show as cathode inlet humidity and/or cell pressure increase the average current density for the unflooded portions of the cell increases but the system becomes more sensitive to flooding. Operating the cell at higher temperatures would lead to higher average current densities and the chance of system being flooded is reduced. In addition, higher cathode stoichiometries prevent system flooding but the average current density remains almost constant.

Deformation of a Droplet in a Channel Flow

2008 ◽  
Vol 5 (4) ◽  
Author(s):  
Ebrahim Shirani ◽  
Shila Masoomi
Keyword(s):  
Surface Tension ◽  
Channel Flow ◽  
Polymer Electrolyte Membrane ◽  
Droplet Deformation ◽  
Navier Stokes Equation ◽  
Droplet Shape ◽  
Viscous Forces ◽  
Electrolyte Membrane ◽  
Wide Range ◽  
Surrounding Fluid

Formation of droplets especially in microchannels, micro-electro-mechanical systems (MEMS) and polymer electrolyte membrane fuel cells and their effects on the performance of these devises, as well as scientific aspect of the droplet behavior in the fluid flow motion, makes the subject of the droplet deformation and motion an attractive problem. In this work, we numerically simulate the deformation of a drop of water attached to the wall of a channel flow using full two-dimensional Navier–Stokes equation and the volume-of-fluid method for capturing the interface. The effects of channel inlet velocity, the density and viscosity of the surrounding fluid, and the surface tension coefficient on the flow structures both inside and outside of the droplet as well as the deformation of the droplets are examined. Several test cases, which cover rather wide range of the Reynolds and capillary numbers, based on the surrounding fluid properties and the diameter of the droplet are performed. The Reynolds number, Re, range is from 24 to 1800 and the capillary number, Ca, is from 0.014 to 0.219. It is found that the droplet shape changes and depending on the capillary and Reynolds numbers, it eventually reaches an equilibrium state when there is balance between the surface tension, inertia, and the viscous forces. It is also found that the deformation of the droplet does not depend on the capillary numbers, when Ca is small, but it is a strong function of Ca, when it is large.

Tolerance to carbon corrosion of various carbon structures as catalyst supports for polymer electrolyte membrane fuel cells

2019 ◽  
Vol 7 (43) ◽  
pp. 25056-25065 ◽  
Author(s):  
Sung Won Lee ◽  
Sung Ryul Choi ◽  
Jeongyun Jang ◽  
Gu-Gon Park ◽  
Seung Ho Yu ◽  
...  
Keyword(s):  
High Performance ◽  
Polymer Electrolyte Membrane ◽  
Mitigation Strategy ◽  
Catalyst Supports ◽  
Carbon Supports ◽  
Carbon Corrosion ◽  
Electrolyte Membrane ◽  
Spherical Carbon ◽  
Carbon Structures ◽  
Wide Range

We introduce a material-based mitigation strategy to improve the toughness of the carbon supports of high performance PEMFC through the hybridization of active spherical carbon and mechanochemically durable PCNF featuring a wide range of fiber stems.

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