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Proton-conducting oxides based on LaScO3: structure, properties and electrochemical applications. A focus review

Ekaterina P. Antonova


Solid state proton conductors are promising materials for various electrochemical applications. LaScO3 - based oxides are representatives of the proton-conducting oxides with perovskite structure, alternative to conventional cerates and zirconates of alkaline-earth elements. These oxides exhibit a sufficient level of proton conductivity with a combination of good chemical stability in the H2O and CO2 - containing atmospheres. The current review is focused on summarizing and analyzing of the currently available data on LaScO3 - based oxides. The peculiarities of crystal structure and proton defect formation, aspects of synthesis and obtaining dense ceramics, and electrical properties are provided. Additionally, the current state of applications in electrochemical devices of LaScO3 - based oxides is briefly discussed.


LaScO3; proton-conducting oxide; electrical conductivity; perovskite; SOFC

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Mohan M, Shetti NP, Aminabhavi TM, Perovskites: A new generation electrode materials for storage applications, J. Power Sources, 574 (2023) 233166.

Jiang X, Yin WJ, High-throughput computational screening of oxide double perovskites for optoelectronic and photocatalysis applications, J. Energy Chem., 57 (2021) 351–358.

Mahmoudi F, Saravanakumar K, Maheskumar V, Njaramba LK, et al., Application of perovskite oxides and their composites for degrading organic pollutants from wastewater using advanced oxidation processes: Review of the recent progress, J. Hazard. Mater., 436 (2022) 129074.

Golkhatmi SZ, Asghar MI, Lund PD, A review on solid oxide fuel cell durability: latest progress, mechanisms, and study tools, Renew. Sustain. Energy Rev., 161 (2022) 112339.

Mahato N, Banerjee A, Gupta A, Omar S, Balani K, Progress in material selection for solid oxide fuel cell technology: A review, Prog. Mater. Sci., 72 (2015) 141–337.

Fabbri E, Bi L, Pergolesi D, Traversa E, Towards the next generation of solid oxide fuel cells operating below 600 °C with chemically stable proton-conducting electrolytes, Adv. Mater., 24 (2012) 195–208.

Kim J, Sengodan S, Kim S, Kwon O, et al., Proton conducting oxides: a review of materials and applications for renewable energy conversion and storage, Renew. Sust. Energ. Rev., 109 (2019) 606–618.

Iwahara H, Esaka T, Uchida H, Maeda N, Proton conduction in sintered oxides and its application to steam electrolysis for hydrogen production, Solid State Ionics, 3–4 (1981) 359–363.

Medvedev D, Murashkina A, Pikalova E, Demin A, et al., BaCeO3: materials development, properties and application, Prog. Mater. Sci., 60 (2014) 72–129.

Hossain MK, Chanda R, El-Denglawey A, Emrose T, et al., Hashizume K, Recent progress in barium zirconate proton conductors for electrochemical hydrogen device applications: A review, Ceramics Int., 47 (2021) 23725–23748.

Liu Y, Ran R, Tade MO, Shao Z, Structure, sinterability, chemical stability and conductivity of proton-conducting BaZr0.6M0.2Y0.2O3–δ electrolyte membranes: the effect of the M dopant, J. Membr. Sci., 467 (2014) 100–108.

Zvonareva IA, Medvedev DA, Proton-conducting barium stannate for high-temperature purposes: A brief review, J. Eur. Ceram. Soc., 43 (2023) 198–207.

Li H, Li Y, Huang W, Ding Y, Effect of various doping on electrochemical properties of KNbO3 proton conductor, Solid State Ionics, 399 (2023) 116318.

Shlyakhtina AV, Abrantes JCC, Gomes E, Lyskov NV, et al., Evolution of oxygen–ion and proton conductivity in Ca-doped Ln2Zr2O7 (Ln = Sm, Gd), located near pyrochlore–fluorite phase boundary, Materials, 12 (2019) 2452.

Zhu Z, Liu B, Shen J, Lou Y, Ji Y, La2Ce2O7: A promising proton ceramic conductor in hydrogen economy, J. Alloys Compd., 659 (2016) 232–239.

Antonova EP, Farlenkov AS, Tropin ES, Eremin VA, et al., Oxygen isotope exchange, water uptake and electrical conductivity of Ca-doped lanthanum zirconate, Solid State Ionics, 306 (2017) 112–117.

Fop S, Solid oxide proton conductors beyond perovskites, J. Mater. Chem. A, 9 (2021) 18836.

Tarasova NA, Animitsa IE, Galisheva AO, Medvedev DA, Layered and hexagonal perovskites as novel classes of proton-conducting solid electrolytes. A focus review, Electrochem. Mater. Technol., 1 (2022) 20221004.

Tarasova N, Galisheva A, Animitsa I, Korona D, Davletbaev K, Novel proton-conducting layered perovskite based on BaLaInO4 with two different cations in B-sublattice: synthesis, hydration, ionic (O2−, H+) conductivity, Int. J. Hydrog. Energy, 47 (2022) 18972–18982.

Tarasova N, Bedarkova A, Animitsa I, Abakumova E, et al., Novel protonic conductor SrLa2Sc2O7 with layered structure for electrochemical devices, Materials, 15 (2022) 8867.

Rashid NLRM, Samat AA, Jais AA, Somalu MR, et al., Review on zirconate-cerate-based electrolytes for proton-conducting solid oxide fuel cell, Ceramics Int., 45 (2019) 6605–6615.

Antonova EP, Yaroslavtsev IYu, Bronin DI, Balakireva VB, et al., Peculiarities of electrical transfer and isotopic effects H/D in the proton–conducting oxide BaZr0.9Y0.1O3-δ, Russ. J. Electrochem., 46 (2010) 741–748.

Nomura K, Takeuchi T, Tanase S, Kageyama H, et al., Proton conduction in (La0.9Sr0.1)MIIIO3-δ (MIII=Sc, In, and Lu) perovskites, Solid State Ionics, 154–155 (2002) 647–652.

Lybye D, Poulsen FW, Mogensen M, Conductivity of A- and B-site doped LaAlO3, LaGaO3, LaScO3 and LaInO3 perovskites, Solid State Ionics, 128 (2000) 91–103.

Fujii H, Katayama Y, Shimura T, Iwahara H, Protonic conduction in perovskite-type oxide ceramics based on LnScO3 (Ln=La, Nd, Sm or Gd) at high temperature, J Electroceram., 2 (1998) 119–125.

Nomura K, Kageyama H, Neutron diffraction study of LaScO3-based proton conductor, Solid State Ionics, 262 (2014) 841–844.

Kim, S, Lee KH, Lee HL, Proton conduction in La0.6Ba0.4ScO2.8 cubic perovskite Solid State Ionics, 144 (2001) 109–115.

Kato H, Kudo T, Naito H, Yugami H, Electrical conductivity of Al-doped La1-xSrxScO3 perovskite-type oxides as electrolyte materials for low-temperature SOFC, Solid State Ionics, 159 (2003) 217–222.

Stroeva AYu, Gorelov VP, Kuz'min AV, Antonova EP, Plaksin SV, Phase composition and conductivity of La1−xSrxScO3−α (x = 0.01−0.20) under oxidative conditions, Russ. J. Electrochem., 48 (2012) 509–517.

Kuzmin AV, Stroeva AYu, Gorelov VP, Novikova YuV, et al., Synthesis and characterization of dense proton-conducting La1-xSrxScO3-α ceramics, Int. J. Hydrog. Energy, 44 (2019) 1130–1138.

Ricote S, Bonanos N, Manerbino A, Coors WG, Conductivity study of dense BaCexZr(0.9-x)Y0.1O(3-δ) prepared by solid state reactive sintering at 1500 °C, Int. J. Hydrog. Energy, 37 (2012) 7954–7961.

Medvedev DA, Murashkina AA, Demin AK, Formation of dense electrolytes based on BaCeO3 and BaZrO3 for application in solid oxide fuel cells: the role of solid-state reactive sintering, Rev. J. Chem., 5 (2015) 193–214.

Loureiro FJA, Nasani N, Reddy GS, Munirathnam N.R., Fagg DP, A review on sintering technology of proton conducting BaCeO3-BaZrO3 perovskite oxide materials for protonic ceramic fuel cells, J. Power Sources, 438 (2019) 226991.

Huang Y, Merkle R, Maier J, Effects of NiO addition on sintering and proton uptake of Ba(Zr,Ce,Y)O3-δ, J. Mater. Chem. A, 9 (2021) 14775–14785.

Kuzmin AV, Lesnichyova AS, Tropin ES, Stroeva AYu, et al., LaScO3-based electrolyte for protonic ceramic fuel cells: Influence of sintering additives on the transport properties and electrochemical performance, J. Power Sources, 466 (2020) 228255.

Lesnichyova A, Belyakov S , Stroeva A , Petrova S, et al., Densification and proton conductivity of La1-xBaxScO3-δ electrolyte membranes, Membranes, 12 (2022) 1084.

Farlenkov AS, Smolnikov AG, Ananyev MV, Khodimchuk AV, et al., Local disorder and water uptake in La1–xSrxScO3–δ, Solid State Ionics, 306 (2017) 82–88.

Lesnichyova A, Stroeva A, Belyakov S, Farlenkov A, et al., Water uptake and transport properties of La1-xCaxScO3-α proton-conducting oxides, Materials, 12 (2019) 2219.

Kreuer KD, Proton-conducting oxides, Annu. Rev. Mater. Res., 33 (2003) 333–359.

Stroeva AYu, Balakireva VB, Dunyushkina LA, Gorelov VP, Electroconductivity and nature of ion transfer in La1-xSrxSc1-yMgyO3-α system (0.01 ≤ x = y ≤ 0.20) in dry and humid air, Rus. J. Electrochem., 46 (2010) 552–559

Okuyama Y, Kozai T, Ikeda S, Matsuka M, Sakai T, Matsumoto H, Incorporation and conduction of proton in Sr-doped LaMO3 (M=Al, Sc, In, Yb, Y), Electrochim. Acta, 125 (2014) 443–449.

Farlenkov AS, Putilov LP, Ananyev MV, Antonova EP, et al., Water uptake, ionic and hole transport in La0.9Sr0.1ScO3–δ, Solid State Ionics, 306 (2017) 126–136.

Kreuer KD, Adams St, Munch W, Fuchs A, et al., Proton conducting alkaline earth zirconates and titanates for high drain electrochemical applications, Solid State Ionics, 145 (2001) 295–306.

Stroeva AY, Gorelov VP, Balakireva VB, Conductivity of La1−x SrxSc1−yMgyO3−α (x = y = 0.01–0.20) in reducing atmosphere, Russ. J. Electrochem., 46 (2010) 784–788.

Gorelov VP, Stroeva AY, Solid proton conducting electrolytes based on LaScO3, Russ. J. Electrochem., 48 (2012) 949–960.

Islam MS, Slater PR, Tolchard JR, Dinges T, Doping and defect association in AZrO3 (A = Ca, Ba) and LaMO3 (M = Sc, Ga) perovskite-type ionic conductors, Dalton Transactions 19 (2004) 3061–3066.

Lesnichyova AS, Belyakov SA, Stroeva AYu, Kuzmin AV, Proton conductivity and mobility in Sr-doped LaScO3 perovskites, Ceramics Int., 47 (2021) 6105–6113.

Belyakov SA, Lesnichyova AS, Plekhanov MS, Prinz N, et al., Dopant-induced changes of local structures for adjusting the hydration ability of proton conducting lanthanum scandates, J. Mater. Chem. A, 11 (2023) 19605–19618.

Kato H, Iguchi F, Yugami H, Compatibility and performance of La0.675Sr0.325Sc0.99Al0.01O3 perovskite-type oxide as an electrolyte material for SOFCs, Electrochemistry, 82 (2014) 845–850.

Iguchi F, Yamane T, Kato H, Yugami H, Low-temperature fabrication of an anode-supported SOFC with a proton-conducting electrolyte based on lanthanum scandate using a PLD method, Solid State Ionics, 275 (2015) 117–121.

Plekhanov MS, Kuzmin AV, Tropin ES, Korolev DA, Ananyev MV, New mixed ionic and electronic conductors based on LaScO3: Protonic ceramic fuel cells electrodes, J. Power Sources, 449 (2020) 227476.

Osinkin D, Tropin E, Hydrogen production from methane and carbon dioxide mixture using all-solid-state electrochemical cell based on a proton-conducting membrane and redox-robust composite electrodes, J. Energy Chem., 69 (2022) 576–584.


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