PEFCs or fuel cells have been proposed to replace protons (PEMFCs) as alternatives to replace many of the existing energy conversion technologies, including internal compounds, fuel and batteries. There have been significant developments in PEFC technology in the past decade in case of mechanical interactions, start-ups, enhanced durability, and a better understanding of waterermanagementandmasstransportlosses.

This volume of modern aspects of electrochemical chemistry is intended for the diagnosis, excitation, diagnosis, and photoelectric and chemical excretions by HuangandReifsniderandGuetal.provideanin-depth review of endurance issues in PEFCs as well as recent developments in understanding and mitigating degradation in the polymeraneanelectroalsyst polymer. The cold startup, the start of PEFC stacks of below-zero temperatures, is a very important capacity that can only be achieved under thelastfewyears.TajiriandWangprovideatutoveroverviewviewhe requirements for the rigoldstart, andprovideasummaryofexperimental Diagnostics andcold-startmodelingstudies. Chapters 4-6 address specific diagnostic methods in PEFCs.

Martin et al. Provide a detailed review of the distributed diagnostic methods for species, temperature, and current status in PEFCs in Chapter IV.

In Chapter 5, Hasey and Jacobson describe the actual terms of midterm food in water planning, communication plans between the middle classes and magnetic resonance imaging (MRI). WATER IN PEFC AND INDONITUDYDELASSERASFORCECENTROSCOPECOPE (TDLAS) FORCESINCEFOWERFORFUNCONTININATIONCAPOR 6.

Diffusionmedia (DM) areproneto? oodingwithliquidwater. Nevertheless, it is possible that their distribution will be possible, distributed, and characteristics alike, distributed in an unusual manner and will be markedly marked by their online transmission.

Provide a description for the transfer of liquid water in porousDMduitocapillarityanddescribeexperimentaltechniques usedtocharacterizeDMproperties. v vi Preface and naltwochaptersdiscussmodelingofPEFCs.Mukherjee and Wang provide an in-depth review of the modeling of the average balance of transport in two phases, while Zhou et al.

Summarize all of the synthesis of electrochemical reactions on electrocatalysts and transfer protons through the polymer electrolyte using atsyticimulationtoolssuchasmoleculardynamics and Monte Carlo techniques. Everychapterinthevolumeisself-contained; thereforetheydo notneedtobereadinacertainorder.

Special thanks to the 23 authors who contributed to this volume.