Interaction of phosphoric acid with cell components in high temperature polymer electrolyte fuel cells:
Gespeichert in:
| 1. Verfasser: | |
|---|---|
| Format: | Abschlussarbeit Buch |
| Sprache: | German |
| Veröffentlicht: |
Jülich
Forschungszentrum Jülich, Zentralbibliothek
2014
|
| Schriftenreihe: | Schriften des Forschungszentrums Jülich
Reihe Energie & Umwelt ; 219 |
| Schlagworte: | |
| Online-Zugang: | Inhaltstext Inhaltsverzeichnis |
| Beschreibung: | I, 147 S. Ill., graph. Darst. |
| ISBN: | 9783893369720 |
Internformat
MARC
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| 024 | 3 | |a 9783893369720 | |
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| 100 | 1 | |a Liu, Fang |e Verfasser |0 (DE-588)105689461X |4 aut | |
| 245 | 1 | 0 | |a Interaction of phosphoric acid with cell components in high temperature polymer electrolyte fuel cells |c Fang Liu |
| 264 | 1 | |a Jülich |b Forschungszentrum Jülich, Zentralbibliothek |c 2014 | |
| 300 | |a I, 147 S. |b Ill., graph. Darst. | ||
| 336 | |b txt |2 rdacontent | ||
| 337 | |b n |2 rdamedia | ||
| 338 | |b nc |2 rdacarrier | ||
| 490 | 1 | |a Schriften des Forschungszentrums Jülich : Reihe Energie & Umwelt |v 219 | |
| 502 | |a Zugl.: Aachen, RWTH Aachen Univ., Diss., 2014 | ||
| 655 | 7 | |0 (DE-588)4113937-9 |a Hochschulschrift |2 gnd-content | |
| 830 | 0 | |a Schriften des Forschungszentrums Jülich |v Reihe Energie & Umwelt ; 219 |w (DE-604)BV023393979 |9 219 | |
| 856 | 4 | 2 | |m X:MVB |q text/html |u http://deposit.dnb.de/cgi-bin/dokserv?id=4756784&prov=M&dok_var=1&dok_ext=htm |3 Inhaltstext |
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Datensatz im Suchindex
| _version_ | 1806328987666874368 |
|---|---|
| adam_text |
CONTENTS
1 INTRODUCTION AND GOA* OF WORK 1
1.1 ACID NABPBI M EM BRAN E
.
1
1.2 ACID DISTRIBUTION IN CATALYST LAYER
.
2
1.3 GAS DISTRIBUTION IN CATALYST LAYER
.
2
1.4
OUTLINE.
2
2 THEORY AND LITERATURE OVERVIEW 3
2.1 GENERAL
OVERVIEW.
3
2.2 MEMBRANE WITH PHOSPHORIC ACID
.
4
2.2.1 KINETIC S TU D Y
.
5
2.2.2 THERMODYNAMIC S TU D Y
.
5
2.3 GAS DIFFUSION ELECTRODE
.
8
2.3.1 GAS DIFFUSION LA Y E
R.
8
2.3.2 CATALYST LAYER WITH PHOSPHORIC ACID
.
9
2.3.3 DEGRADATION OF CATALYST LA Y E R
.11
2.4 FLOW FIELD GEOMETRY
.12
2.5 STATISTICAL A N A LY S IS
.13
2.5.1 DISTRIBUTION OF EXPERIMENTAL D A T A
.13
2.5.2 DESIGN OF E X P E RIM E N
T.
14
3 DOPING MEMBRANE
*
CE** ASSEMBLY AND CHARACTERIZATION 15
3.1 DOPING THE M EM
BRANE.
15
3.1.1 DOPING ABPBI WITH VARIED
TEMPERATURE.15
3.1.2 DOPING ABPBI WITH VARIED
CONCENTRATION.
16
3.1.3 DOPING LEVEL OF A B P B
I.
16
3.2 MEA AND CELL A S S E M B LY
.
18
3.2.1 ELECTRODE P RE P A RA TIO N
.
18
3.2.2 INTRODUCING ACID INTO THE M E A
.19
3.2.3 CELL
ASSEMBLY.19
3.3 PHYSICAL CHARACTERIZATION
.20
3.3.1 CATALYST LOADING GRADIENT OF 20
*
.3.2 AJ
*
PERMEABILITY OF GDL AND G D E
.
20
3.33 ********* HIFFPMNNP HPTWPPN INLPT *** NIITLPT NF * * *
.21
3.4 ELECTROCHEMICAL
CHARACTERIZATION.21
3.4.1 BREAK-** P RO CE
SS.
21
3.4.2 POLARIZATION C U R V E
.22
3.4.3 ELECTROCHEMICAL IMPEDANCE SPECTROSCOPY
.
22
3.4.4 DURABILITY EXPERIMENT
.23
3.4.5 CYCLIC VOLTAM
METRY.23
3.4.6 WATER COLLECTION
.
24
3.5 MORPHOLOGY AND STRUCTURE CHARACTERIZATION
.
25
3.5.1 M
ICROSCOPY.
25
35.2 GRAIN SJZE OF P LA TIN U M
.
25
3.6 STATISTICAL S TU D Y
.
25
3 7 REPRODUCIBILITY OF **-PEFCS (SINGLE C E LLS
).26
4 DETERMINATION OF ACID DOPING LEVEL 29
*
4.1 DOPING LEVEL OF ABPBI
MEMBRANE.29
4.2 REACTION RATE JA W
.
31
4.2.1 AVAILABLE SITES
.
31
4.2.2 PSEUDO-FIRST-ORDER RATE LAW
.
33
4.2.3 PSEUDO-SECOND-ORDER RATE L A W
.
35
4.2.4 ACTIVATION
ENERGY.38
4.3 DIFFUSION MECHANISM OF DOPING 38
4.4 S U M M A RY
.
40
5 DETERMINATION OF ACID DOPING LEVEL
*
41
5.1 ISOTHERM STUDY AT ROOM TE M P ERA TURE
.
41
5.1.1 DOPING LEVEL WJTH DIFFERENT ACID CONCENTRATIONS
.41
5.1.2 S C A TC H A RD P LO
T.
42
5.1.3 DISSOCIATION OF *******3*
*
4
.
45
5.2 ISOTHERM STUDY AT 70
*
C
.46
5.2.1 DOPING LEVEL WITH DIFFERENT ACID CONCENTRATIONS
.46
5.2.2 SCATCHARD P L O T
.47
5.3 S U M M A RY
.
49
6 MICROPOROUS LAYER OF ANODE AND CATHODE 51
6.1 EFFECT OF MPL ON PHYSICAL PROPERTJES OF GDE
.
51
6.1.1 STRUCTURE AND
MORPHOLOGY.51
6.1.2 CATALYST LOADING GRADIENT
.54
6.1.3 AIR
PERMEABILITY.55
6.2 EFFECT OF MPL ON ELECTROCHEMICAL PERFORMANCE OF HT*PEFCS
.
55
6.2.1 POLARIZATION CU RVE
S.56
6.2.2
RESISTANCES.
57
6.2.3 WATER COLLECTION
.58
6.2.4 DISCUSSION
.
59
6.3 S U M M A RY
.
61
7 ANODE THICKNESS 63
7.1 EFFECT OF CATALYST LAYER THICKNESS ON PHYSICAL PROPERTIES OF GDE .
*
. . . . . . . . . . 63
7.1.1 M
ORPHOLOGY.63
7.1.2 AIR
PERMEABILITY.64
7.2 EFFECT OF CATALYST LAYER THICKNESS ON PERFORMANCE OF HT-PEFC
.
66
7.2.1 POLARIZATION CU RVE
S.
66
7.2.2 WATER COLLECTION
.67
7.3 DISCUSSION
.
68
7.4 S U M M A
RY.
68
8 CATALYST LAYER MORPHOLOGY
*
PLATINUM LOADING AND PHOSPHORIC ACID CONTENT 69
8.1 EXPERIMENTAL P L A N
.69
8.2 RESULTS AND A
NALYSIS.70
8.2.1 CEL. VO LTAG E
.70
8.2.2
RESISTANCES.71
8.2.3 WATER COLLECTION
.74
8.2.4 ACTIVE SURFACE AREA OF CATHODE CATALYST
. 75
8 3 DISCUSSION
.
77
8.3.1 CELL OPERATED UNDER CURRENTLESS C O N D ITIO N
.77
8.3.2 CEH OPERATED UNDER CONSTANT L O A D
.82
8.3.3 AC*D CONCENTRARON N CATHODE
.
85
8.4 S U M M A RY
.
89
9 FLOW FIELD GEOMETRY 91
9.1 CUSTOMIZED SPIRAL FLOW F I E LD
.
91
9.1.1 ARRANGEMENT
*
* LOW CHANNELS
.
92
9.1.2 PRESSURE DROP BETWEEN INLET AND
OUTLET.
93
9.1.3 CELL
PERFORMANCE.94
9.1.4
RESISTANCES.95
9.2 OPTIMIZATION OF SPIRAL FLOW F I E L D
.100
9.2.1 PRESSURE DEFERENCE
.100
9.2.2 CELL
PERFORMANCE.101
9.2.3
RESISTANCES.
102
9.3 DURABILITY OF OPTIMIZED SPIRAL FLOW F I E L D
.
104
9.4 S U M M A
RY.108
10 DISCUSSION 109
10.1 INTERACTION OF PHOSPHORIC ACID WITH ABPBI
MEMBRANE. 109
10.2 INTERACTION OF PHOSPHORIC
.110
10.3 INTERACTION OF PHOSPHORIC
.110
11 CONCLUSION 111
APPENDIX 113
A1 CONCENTRATION AND DENSITY OF PHOSPHORIC A C ID
.
113
*2 DOPED M E M B RA N E
.
113
*2.1 MEMBRANE DIMENSION AND DOPING LEVEL
.
113
*2.2 COMPONENT CONTENT IN DOPED MEMBRANE
.
114
*2.3 SPECIFIC CONDUCTIVITY OF DOPED MEMBRANE (E X -S ITU
).116
A3 CATALYST LA Y E
R.118
*3.1 CATALYST GRAIN AND
PARTICLE.118
*3.2 GRAIN S*ZE OF OPERATED C A TA LY S
T.118
*3.3 SPECIFIC SURFACE AREA AND UTILIZATION OF PLATINUM
.
118
*3.4 INTERCEPT OF NYQUIST C U E
.120
*3.5 ANODIC CATALYST LOADING AND KINETIC
. 121
*3.6 CATALYST LOADING AND TH IC K N E S S
.121
A3.7 DETAILS OF INVESTIGATED CELLS IN CHAPTER 8
.
122
A4 DESIGN OF FLOW FIE LD
.
123
*4.1 PERFORMANCE OF CELLS WITH DIFFERENT ACTIVE A RE A
.
123
*4.2 WATER ANODE RATIO OF SPIRAL C E LLS
.123
*4.3 MODIFIED FLOW FIELDS D E S IG N S
.124
*4.4 PRESSURE TEST WITH DIFFERENT FLOW FIELD DESIGNS AND ELECTRODE
SUBSTRATES . . . . 125
NOMENCLATURE 127
BIBLIOGRAPHY 131
UST OF FIGURES 139
LIST OF TABLES 145
ACKNOWLEDGMENTS 147 |
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| discipline | Allgemeine Naturwissenschaft |
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| isbn | 9783893369720 |
| language | German |
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| physical | I, 147 S. Ill., graph. Darst. |
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| series2 | Schriften des Forschungszentrums Jülich : Reihe Energie & Umwelt |
| spelling | Liu, Fang Verfasser (DE-588)105689461X aut Interaction of phosphoric acid with cell components in high temperature polymer electrolyte fuel cells Fang Liu Jülich Forschungszentrum Jülich, Zentralbibliothek 2014 I, 147 S. Ill., graph. Darst. txt rdacontent n rdamedia nc rdacarrier Schriften des Forschungszentrums Jülich : Reihe Energie & Umwelt 219 Zugl.: Aachen, RWTH Aachen Univ., Diss., 2014 (DE-588)4113937-9 Hochschulschrift gnd-content Schriften des Forschungszentrums Jülich Reihe Energie & Umwelt ; 219 (DE-604)BV023393979 219 X:MVB text/html http://deposit.dnb.de/cgi-bin/dokserv?id=4756784&prov=M&dok_var=1&dok_ext=htm Inhaltstext DNB Datenaustausch application/pdf http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&local_base=BVB01&doc_number=027499594&sequence=000001&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA Inhaltsverzeichnis |
| spellingShingle | Liu, Fang Interaction of phosphoric acid with cell components in high temperature polymer electrolyte fuel cells Schriften des Forschungszentrums Jülich |
| subject_GND | (DE-588)4113937-9 |
| title | Interaction of phosphoric acid with cell components in high temperature polymer electrolyte fuel cells |
| title_auth | Interaction of phosphoric acid with cell components in high temperature polymer electrolyte fuel cells |
| title_exact_search | Interaction of phosphoric acid with cell components in high temperature polymer electrolyte fuel cells |
| title_full | Interaction of phosphoric acid with cell components in high temperature polymer electrolyte fuel cells Fang Liu |
| title_fullStr | Interaction of phosphoric acid with cell components in high temperature polymer electrolyte fuel cells Fang Liu |
| title_full_unstemmed | Interaction of phosphoric acid with cell components in high temperature polymer electrolyte fuel cells Fang Liu |
| title_short | Interaction of phosphoric acid with cell components in high temperature polymer electrolyte fuel cells |
| title_sort | interaction of phosphoric acid with cell components in high temperature polymer electrolyte fuel cells |
| topic_facet | Hochschulschrift |
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| work_keys_str_mv | AT liufang interactionofphosphoricacidwithcellcomponentsinhightemperaturepolymerelectrolytefuelcells |