001041457 001__ 1041457
001041457 005__ 20250804202236.0
001041457 0247_ $$2doi$$a10.1016/j.ijhydene.2025.04.166
001041457 0247_ $$2ISSN$$a0360-3199
001041457 0247_ $$2ISSN$$a1879-3487
001041457 0247_ $$2datacite_doi$$a10.34734/FZJ-2025-02257
001041457 0247_ $$2WOS$$aWOS:001470368000001
001041457 037__ $$aFZJ-2025-02257
001041457 082__ $$a620
001041457 1001_ $$0P:(DE-Juel1)187353$$aChibuko, Uchechi$$b0$$eCorresponding author
001041457 245__ $$aBreaking limits of solar-to-hydrogen efficiency via synergy with batteries
001041457 260__ $$aNew York, NY [u.a.]$$bElsevier$$c2025
001041457 3367_ $$2DRIVER$$aarticle
001041457 3367_ $$2DataCite$$aOutput Types/Journal article
001041457 3367_ $$0PUB:(DE-HGF)16$$2PUB:(DE-HGF)$$aJournal Article$$bjournal$$mjournal$$s1744616461_17257
001041457 3367_ $$2BibTeX$$aARTICLE
001041457 3367_ $$2ORCID$$aJOURNAL_ARTICLE
001041457 3367_ $$00$$2EndNote$$aJournal Article
001041457 520__ $$aCoupling of photovoltaics (PV) with electrochemical (EC) water splitting is an established concept for storage of excess PV energy via production of green hydrogen. However, intermittent PV output presents a challenge for the stability and lifetime of EC devices in both direct coupled and power electronic assisted systems. The use of batteries is a viable way of smoothing out PV output fluctuations, which is beneficial for EC stability and ultimately lifetime. In our studies of direct coupled PV-EC-battery (PV-EC-B) systems, we have demonstrated self-sustaining operation of the device without control electronics. In addition to the expected storage function, the batteries stabilize the power coupling and improve the solar-to-hydrogen (STH) efficiency of the system despite their own power losses. This synergistic effect originates from the distribution of the daily PV energy over longer periods of EC operation i.e. the reduction of the EC input power and the related kinetic losses. This STH efficiency gain is addressed from two orthogonal viewpoints. First, we investigate how high the synergistic STH gain can be in the optimized system composed of high-efficiency PV and EC components operating close to the system efficiency limit. We show that in a basic day-night operating cycle, an optimally coupled PV-EC system with STH efficiency of 23.0 % can reach STH efficiency of 25.4 % once battery is included. The STH efficiency increase achieved in the PV-EC-B system is 2.4 % abs. higher than the STH efficiency in the reference PV-EC system and 1.9 % abs. higher than the theoretical STH limit of the reference system determined by the EC polarization curve. The second aspect is related to the downscaling of an electrolyzer facilitated by the reduced EC power in the system with battery. We show that the battery allows a reduction of the electrolyzer capacity in the PV-EC-B system by about a factor of two, while operating at the same efficiency as the reference PV-EC system. These results are crucial for the future design, techno-economic and life cycle analysis of advanced PV-powered water splitting.
001041457 536__ $$0G:(DE-HGF)POF4-1213$$a1213 - Cell Design and Development (POF4-121)$$cPOF4-121$$fPOF IV$$x0
001041457 536__ $$0G:(EU-Grant)862030$$aDECADE - DistributEd Chemicals And fuels production  from CO2 in photoelectrocatalytic DEvices (862030)$$c862030$$fH2020-NMBP-ST-IND-2019$$x1
001041457 588__ $$aDataset connected to CrossRef, Journals: juser.fz-juelich.de
001041457 7001_ $$0P:(DE-Juel1)130268$$aMerdzhanova, Tsvetelina$$b1
001041457 7001_ $$0P:(DE-Juel1)166079$$aAgbo, Solomon$$b2
001041457 7001_ $$0P:(DE-Juel1)130285$$aRau, Uwe$$b3$$ufzj
001041457 7001_ $$0P:(DE-HGF)0$$aWurstbauer, Ursula$$b4
001041457 7001_ $$0P:(DE-Juel1)130212$$aAstakhov, Oleksandr$$b5
001041457 773__ $$0PERI:(DE-600)1484487-4$$a10.1016/j.ijhydene.2025.04.166$$gVol. 127, p. 38 - 50$$p38 - 50$$tInternational journal of hydrogen energy$$v127$$x0360-3199$$y2025
001041457 8564_ $$uhttps://juser.fz-juelich.de/record/1041457/files/1-s2.0-S0360319925018075-main.pdf$$yOpenAccess
001041457 8564_ $$uhttps://juser.fz-juelich.de/record/1041457/files/U.Chibuko%20Breaking%20the%20H2%20limit.pdf$$yOpenAccess
001041457 8767_ $$d2025-08-04$$eHybrid-OA$$jDEAL
001041457 909CO $$ooai:juser.fz-juelich.de:1041457$$pec_fundedresources$$pVDB$$pdriver$$pOpenAPC_DEAL$$popen_access$$popenaire$$popenCost$$pdnbdelivery
001041457 9101_ $$0I:(DE-588b)5008462-8$$6P:(DE-Juel1)187353$$aForschungszentrum Jülich$$b0$$kFZJ
001041457 9101_ $$0I:(DE-588b)5008462-8$$6P:(DE-Juel1)130268$$aForschungszentrum Jülich$$b1$$kFZJ
001041457 9101_ $$0I:(DE-588b)5008462-8$$6P:(DE-Juel1)166079$$aForschungszentrum Jülich$$b2$$kFZJ
001041457 9101_ $$0I:(DE-588b)5008462-8$$6P:(DE-Juel1)130285$$aForschungszentrum Jülich$$b3$$kFZJ
001041457 9101_ $$0I:(DE-588b)5008462-8$$6P:(DE-Juel1)130212$$aForschungszentrum Jülich$$b5$$kFZJ
001041457 9131_ $$0G:(DE-HGF)POF4-121$$1G:(DE-HGF)POF4-120$$2G:(DE-HGF)POF4-100$$3G:(DE-HGF)POF4$$4G:(DE-HGF)POF$$9G:(DE-HGF)POF4-1213$$aDE-HGF$$bForschungsbereich Energie$$lMaterialien und Technologien für die Energiewende (MTET)$$vPhotovoltaik und Windenergie$$x0
001041457 9141_ $$y2025
001041457 915__ $$0StatID:(DE-HGF)0200$$2StatID$$aDBCoverage$$bSCOPUS$$d2025-01-02
001041457 915__ $$0StatID:(DE-HGF)0160$$2StatID$$aDBCoverage$$bEssential Science Indicators$$d2025-01-02
001041457 915__ $$0StatID:(DE-HGF)1160$$2StatID$$aDBCoverage$$bCurrent Contents - Engineering, Computing and Technology$$d2025-01-02
001041457 915__ $$0LIC:(DE-HGF)CCBY4$$2HGFVOC$$aCreative Commons Attribution CC BY 4.0
001041457 915__ $$0StatID:(DE-HGF)0600$$2StatID$$aDBCoverage$$bEbsco Academic Search$$d2025-01-02
001041457 915__ $$0StatID:(DE-HGF)0113$$2StatID$$aWoS$$bScience Citation Index Expanded$$d2025-01-02
001041457 915__ $$0StatID:(DE-HGF)0150$$2StatID$$aDBCoverage$$bWeb of Science Core Collection$$d2025-01-02
001041457 915__ $$0StatID:(DE-HGF)0510$$2StatID$$aOpenAccess
001041457 915__ $$0StatID:(DE-HGF)0030$$2StatID$$aPeer Review$$bASC$$d2025-01-02
001041457 915__ $$0StatID:(DE-HGF)0300$$2StatID$$aDBCoverage$$bMedline$$d2025-01-02
001041457 915__ $$0StatID:(DE-HGF)0199$$2StatID$$aDBCoverage$$bClarivate Analytics Master Journal List$$d2025-01-02
001041457 915pc $$0PC:(DE-HGF)0000$$2APC$$aAPC keys set
001041457 915pc $$0PC:(DE-HGF)0001$$2APC$$aLocal Funding
001041457 915pc $$0PC:(DE-HGF)0002$$2APC$$aDFG OA Publikationskosten
001041457 915pc $$0PC:(DE-HGF)0125$$2APC$$aDEAL: Elsevier 09/01/2023
001041457 9201_ $$0I:(DE-Juel1)IMD-3-20101013$$kIMD-3$$lPhotovoltaik$$x0
001041457 9801_ $$aFullTexts
001041457 980__ $$ajournal
001041457 980__ $$aVDB
001041457 980__ $$aUNRESTRICTED
001041457 980__ $$aI:(DE-Juel1)IMD-3-20101013
001041457 980__ $$aAPC