1. School of Science, Harbin Institute of Technology, Shenzhen 518055, China 2. Department of New Energy Science and Technology, College of Chemistry and Environmental Engineering, Shenzhen University, Shenzhen 518060, China 3. Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, China 4. Department of Mechanical Engineering, Seoul National University, Seoul 08826, Republic of Korea
Solid oxide electrolysis cell (SOEC) is a promising water electrolysis technology that produces hydrogen or syngas through water electrolysis or water and carbon dioxide co-electrolysis. Green hydrogen or syngas can be produced by SOEC with renewable energy. Thus, SOEC has attracted continuous attention in recent years for the urgency of developing environmentally friendly energy sources and achieving carbon neutrality. Focusing on 1276 related articles retrieved from the Web of Science (WoS) database, the historical development of SOECs are depicted from 1983 to 2023 in this paper. The co-occurrence networks of the countries, source journals, and author keywords are generated. Moreover, three main clusters showing different content of the SOEC research are identified and analyzed. Furthermore, the scientometric analysis and the content of the high-cited articles of the research of different topics of SOECs: fuel electrode, air electrode, electrolyte, co-electrolysis, proton-conducting SOECs, and the modeling of SOECs are also presented. The results show that co-electrolysis and proton-conducting SOECs are two popular directions in the study of SOECs. This paper provides a straightforward reference for researchers interested in the field of SOEC research, helping them navigate the landscape of this area of study, locate potential partners, secure funding, discover influential scholars, identify leading countries, and access key research publications.
Water electrolysis toward elevated temperature: Advances, challenges and frontiers
Zhang et al. [41]
2023
Chemical Reviews
Advances and challenges in symmetric solid oxide electrolysis cells: Materials development and resource utilization
Gu et al. [55]
2023
Materials Chemistry Frontiers
A comprehensive review of recent progresses in cathode materials for proton-conducting SOFCs
Gao et al. [47]
2023
Energy Reviews
Protonic ceramic electrochemical cells for synthesizing sustainable chemicals and fuels
Liu et al. [60]
2023
Advanced Science
Progress and potential for symmetric solid oxide electrolysis cells
Tian et al. [56]
2022
Matter
A review of solid oxide steam-electrolysis cell systems: Thermodynamics and thermal integration
Min et al. [18]
2022
Applied Energy (AE)
Analysis of solid oxide fuel and electrolysis cells operated in a real-system environment: State-of-the-health diagnostic, failure modes, degradation mitigation and performance regeneration
Subotic et al. [42]
2022
Progress in Energy and Combustion Science
Electrochemical conversion of C1 molecules to sustainable fuels in solid oxide electrolysis cells
Lv et al. [53]
2022
Chinese Journal of Catalysis
Alternative and innovative solid oxide electrolysis cell materials: A short review
Nechache et al. [43]
2021
Renewable & Sustainable Energy Reviews (RSER)
A review on cathode processes and materials for electro-reduction of carbon dioxide in solid oxide electrolysis cells
Jiang et al. [44]
2021
Journal of Power Sources (JPS)
High-temperature electrocatalysis and key materials in solid oxide electrolysis cells
Ye & Xie [46]
2021
Journal of Energy Chemistry (JEC)
Air electrodes and related degradation mechanisms in solid oxide electrolysis and reversible solid oxide cells
Khan et al. [48]
2021
RSER
Recent advances and perspectives of fluorite and perovskite-based dual-ion conducting solid oxide fuel cells
Cao et al. [45]
2021
JEC
Advancing the multiscale understanding on solid oxide electrolysis cells via modeling approaches: A review
Li et al. [51]
2021
RSER
Recent advances in solid oxide cell technology for electrolysis
Hauch et al. [37]
2020
Science
Review—Electrochemical CO2 reduction for CO production: Comparison of low- and high-temperature electrolysis technologies
Kungas [52]
2020
Journal of the Electrochemical Society (JES)
Degradation of solid oxide electrolysis cells: Phenomena, mechanisms, and emerging mitigation strategies—A review
Wang et al. [49]
2020
Journal of Materials Science & Technology
Surface segregation in solid oxide cell oxygen electrodes: Phenomena, mitigation strategies and electrochemical properties
Chen & Jiang [50]
2020
Electrochemical Energy Reviews (EER)
Progress in metal-supported solid oxide electrolysis cells: A review
Tucker [57]
2020
International Journal of Hydrogen Energy (IJHE)
High-temperature CO2 electrolysis in solid oxide electrolysis cells: Developments, challenges, and prospects
Song et al. [54]
2019
Advanced Materials
Progress report on proton conducting solid oxide electrolysis cells
Lei et al. [58]
2019
Advanced Functional Materials (AFM)
Trends in research and development of protonic ceramic electrolysis cells
Medvedev [59]
2019
IJHE
Tab.1
Fig.1
Source journal
Documents
Citations
Avg. citations
Total link strength
JES
57
2522
44.2
994
JPS
133
5512
41.4
2030
Solid State Ionics (SSI)
31
1177
38.0
440
IJHE
197
6878
34.9
1880
Journal of Materials Chemistry A (JMCA)
46
1564
34.0
594
Energy
18
595
33.1
126
JEC
14
454
32.4
258
Applied Catalysis B-Environmental
11
353
32.1
158
Electrochemistry Communications
10
302
30.2
154
Faraday Discussions
11
296
26.9
160
ACS Applied Materials & Interfaces
15
398
26.5
252
AE
28
731
26.1
280
Electrochimica Acta
39
764
19.6
499
Chemical Engineering Journal (CEJ)
15
275
18.3
218
Fuel Cells
39
687
17.6
467
Journal of Alloys and Compounds
12
174
14.5
70
Energy Conversion and Management (ECM)
34
489
14.4
224
JCU
14
174
12.4
188
Ceramics International
29
264
9.1
184
Tab.2
Fig.2
Fig.3
Fig.4
Keyword
Occurrences
Total link strength
Cluster
Clussolid oxide electrolysis cell
616
535
Yellow
Solid oxide fuel cell
139
128
Brown
Hydrogen production
110
106
Red
Electrolysis
60
56
Red
Co-electrolysis
52
49
Brown
CO2 electrolysis
50
44
Orange
Degradation
49
48
Dark blue
Steam electrolysis
43
39
Green
Oxygen electrode
40
40
Green
Hydrogen
36
35
Red
Carbon dioxide
34
33
Purple
Perovskite
33
29
Light blue
High temperature electrolysis
31
30
Brown
CO2 reduction
29
27
Purple
Electrochemical performance
29
27
Yellow
Cathode
28
27
Yellow
Stability
28
28
Green
High temperature steam electrolysis
26
25
Red
Stack
24
23
Dark blue
Solid oxide electrolyser
23
22
Red
Tab.3
Fig.5
Fig.6
Fig.7
Title
Authors
Year
Source Journal
Total citations
Average citations per year
Eliminating degradation in solid oxide electrochemical cells by reversible operation
Graves et al. [72]
2015
Nature Materials
353
39.22
Electrolysis of carbon dioxide in solid oxide electrolysis cells
Ebbesen & Mogensen [86]
2009
JPS
396
26.4
Hybrid-solid oxide electrolysis cell: A new strategy for efficient hydrogen production
Kim et al. [87]
2018
Nano Energy
154
25.67
Co-electrolysis of CO2 and H2O in solid oxide cells: Performance and durability
Graves et al. [73]
2011
SSI
327
25.15
In situ exsolved FeNi3 nanoparticles on nickel doped Sr2Fe1.5Mo0.5O6–δ perovskite for efficient electrochemical CO2 reduction reaction
Lv et al. [79]
2019
JMCA
116
23.2
Highly stable and efficient catalyst with in situ exsolved Fe–Ni alloy nanospheres socketed on an oxygen deficient perovskite for direct CO2 electrolysis
Liu et al. [80]
2016
ACS Catalysis
177
22.13
Large-scale electricity storage utilizing reversible solid oxide cells combined with underground storage of CO2 and CH4
Jensen et al. [88]
2015
Energy & Environmental Science (EES)
197
21.89
Enhancing CO2 electrolysis performance with vanadium-doped perovskite cathode in solid oxide electrolysis cell
Zhou et al. [81]
2018
Nano Energy
129
21.5
Degradation phenomena in a solid oxide electrolysis cell after 9000 h of operation
Tietz et al. [74]
2013
JPS
235
21.36
Perovskite oxyfluoride electrode enabling direct electrolyzing carbon dioxide with excellent electrochemical performances
Li et al. [82]
2019
Advanced Energy Materials
105
21
Step-change in high temperature steam electrolysis performance of perovskite oxide cathodes with exsolution of B-site dopants
Tsekouras et al. [83]
2013
EES
230
20.91
Multi-objective optimization and comparative performance analysis of hybrid biomass-based solid oxide fuel cell/solid oxide electrolyzer cell/gas turbine using different gasification agents
Habibollahzade et al. [89]
2019
AE
103
20.6
New optimal design for a hybrid solar chimney, solid oxide electrolysis and fuel cell based on improved deer hunting optimization algorithm
Tian et al. [90]
2020
Journal of Cleaner Production
78
19.5
Promoting exsolution of RuFe alloy nanoparticles on Sr2Fe1.4Ru0.1Mo0.5O6–δ via repeated redox manipulations for CO2 electrolysis
Lv et al. [84]
2021
Nature Communications
56
18.67
Solid oxide electrolysis cells: Degradation at high current densities
Knibbe et al. [75]
2010
JES
258
18.43
Comparison of microstructural evolution of fuel electrodes in solid oxide fuel cells and electrolysis cells
Trini et al. [76]
2020
JPS
71
17.75
Thermodynamic assessment of a novel multi-generation solid oxide fuel cell-based system for production of electrical power, cooling, fresh water, and hydrogen
Haghghi [91]
2019
ECM
82
16.4
In situ exsolved Co nanoparticles on Ruddlesden-Popper material as highly active catalyst for CO2 electrolysis to CO
Park et al. [85]
2019
Applied Catalysis B-Environmental
81
16.2
Solid oxide electrolysis cells: Microstructure and degradation of the Ni/yttria-stabilized zirconia electrode
Hauch et al. [77]
2008
JES
257
16.06
Ni/YSZ electrodes structures optimized for increased electrolysis performance and durability
Hauch et al. [78]
2016
SSI
127
15.88
Tab.4
Topic
Average publication year
Average citations per article
Annual average citations per article
Fuel electrode
2017.05
84.23
11.85
Air electrode
2014.14
78.71
8.14
Electrolyte
2015.20
76.80
8.75
Co-electrolysis
2015.42
96.46
11.01
Proton-conducting SOECs
2019.57
66.14
13.83
Modeling
2017.31
76.66
11.42
Tab.5
Term
Occurrences
Relevance score
Stability
63
0.76
Nanoparticle
45
0.71
Cathode material
38
0.81
Catalytic activity
37
0.9
Solid oxide fuel cell
35
1.61
Surface
35
1.07
Mode
30
1.49
Formation
29
0.85
Hydrogen electrode
28
1.51
YSZ
28
0.97
Microstructure
27
0.83
Perovskite
27
0.77
Technology
27
0.43
Development
25
1.50
Ni-YSZ
25
0.85
Oxygen vacancy
25
0.68
Zirconia
24
0.48
Electrocatalytic activity
23
0.89
Electrolysis performance
23
0.38
Oxide
23
1.01
Steam electrolysis
23
0.37
Tab.6
Fig.8
Fig.9
Term
Occurrence
Relevance score
Fuel cell
73
0.28
Analysis
48
0.99
Delamination
36
1.11
Electrolysis mode
30
0.25
Yttria
30
0.27
Formation
29
0.79
Interface
29
1.28
Mode
29
1.06
Polarization
29
1.42
SOEC mode
29
0.74
Surface
28
1.15
Solid oxide cell
27
0.70
Reversible solid oxide cell
25
0.99
Single cell
25
0.70
Steam electrolysis
24
0.41
Application
23
0.42
Nanoparticle
21
0.69
SOFC mode
21
1.28
Cathode
20
0.63
La0.6Sr0.4Co0.2Fe0.8O3–δ
19
0.28
Porosity
19
0.48
Tab.7
Fig.10
Fig.11
Term
Occurrences
Relevance score
Fuel cell
32
0.14
Conductivity
29
0.51
Electrolysis
28
0.26
Zirconia
21
0.8
Degradation
17
0.79
Electrolysis mode
16
0.33
Addition
15
0.67
Property
15
0.71
Proton
15
1.07
YSZ electrolyte
15
0.79
Application
14
0.51
Atmosphere
14
0.77
Voltage
14
0.74
Microstructure
13
0.71
Technique
13
0.86
CO2
12
1.13
Electrolyte material
12
1.35
Value
12
0.33
Yttria
12
1.08
Air
11
0.46
CO2 electrolysis
11
0.9
Delamination
11
0.78
Increase
11
0.4
Tab.8
Fig.12
Fig.13
Term
Occurrences
Relevance score
Production
101
0.36
°C
100
0.59
Model
96
0.51
Efficiency
82
0.39
Electrode
79
1.11
System
65
0.92
Power
58
1.1
Technology
58
0.49
Fuel
52
0.6
Energy
50
0.48
Paper
50
0.84
Electrolyte
49
0.5
Electrochemical performance
44
0.94
Degradation
43
1.31
Hydrogen
41
0.35
Electricity
40
0.86
Increase
39
0.48
Pressure
39
0.56
Stability
35
0.73
Fuel electrode
34
1.24
Tab.9
Fig.14
Fig.15
Term
Occurrences
Relevance score
Reaction
20
0.60
Fuel cell
20
0.39
Production
17
0.50
Process
15
0.76
Pressure
14
0.78
Atmosphere
13
0.83
Electrolyte material
12
0.77
Air electrode
11
0.86
Air
11
0.78
Rate
11
0.48
CO2
10
1.65
Conversion
10
1.43
Steam electrolysis
10
0.96
Cathode
9
1.32
H-SOEC
9
0.97
Proton conductivity
9
0.72
Oxygen electrode
8
1.00
Ceramic
8
0.83
mA/cm2
8
0.69
Electrochemical performance
8
0.68
Advantage
8
0.53
Tab.10
Fig.16
Fig.17
Term
Occurrences
Relevance score
Efficiency
125
0.34
System
118
0.58
Production
111
0.18
Electrode
90
1.70
Hydrogen
81
0.45
Energy
74
0.36
Technology
72
0.36
Solid oxide fuel cell
71
0.54
°C
68
0.48
Power
67
0.74
Voltage
56
0.41
Mechanism
55
1.30
Cathode
52
0.50
Electricity
50
0.60
Distribution
49
0.69
Cost
45
1.32
Concentration
42
0.77
Solid oxide cell
41
0.75
Heat
40
0.84
Increase
40
0.76
Storage
40
0.52
Tab.11
Fig.18
Fig.19
1
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