TY - JOUR

T1 - Nonmetal doping strategy to enhance the protonic conductivity in CaZrO3

AU - Tarasova, N.

AU - Bedarkova, A.

AU - Animitsa, I.

AU - Davletbaev, K.

AU - Fedorova, I.

N1 - The study was financially supported by the Ministry of Education and Science of the Russian Federation (state assignment no. 075-03-2021-051/5 ).

PY - 2023/7/1

Y1 - 2023/7/1

N2 - Hydrogen energy is one of the most developing areas of clean energy due to various advantages of hydrogen compared to traditional fossil fuels. One of hydrogen energy electrochemical devices is proton-conducting solid oxide fuel cells. The obtaining of novel highly proton conductive materials is relevant. Nonmetal doping strategy to improve the protonic conductivity in perovskite-related materials is understudied. The phosphorous-doped perovskite CaZr0.95P0.05O3.025 was obtained for the first time. The possibility for water uptake was proved by thermogravimetry and mass-spectrometry investigations. It was shown that phosphorous doping led to increase in the conductivity values up to 500 times. The composition CaZr0.95P0.05O3.025 demonstrates nearly pure proton transport below 600 °C under wet air. The proton conductivity values are 3.3·10−6 S/cm at 670 °C and 7.6·10−7·S/cm at 500 °C. The nonmetal doping strategy is prospective way to enhance electrical conductivity of proton conductors with perovskite structure.

AB - Hydrogen energy is one of the most developing areas of clean energy due to various advantages of hydrogen compared to traditional fossil fuels. One of hydrogen energy electrochemical devices is proton-conducting solid oxide fuel cells. The obtaining of novel highly proton conductive materials is relevant. Nonmetal doping strategy to improve the protonic conductivity in perovskite-related materials is understudied. The phosphorous-doped perovskite CaZr0.95P0.05O3.025 was obtained for the first time. The possibility for water uptake was proved by thermogravimetry and mass-spectrometry investigations. It was shown that phosphorous doping led to increase in the conductivity values up to 500 times. The composition CaZr0.95P0.05O3.025 demonstrates nearly pure proton transport below 600 °C under wet air. The proton conductivity values are 3.3·10−6 S/cm at 670 °C and 7.6·10−7·S/cm at 500 °C. The nonmetal doping strategy is prospective way to enhance electrical conductivity of proton conductors with perovskite structure.

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U2 - 10.1016/j.ijhydene.2022.11.264

DO - 10.1016/j.ijhydene.2022.11.264

M3 - Article

VL - 48

SP - 22336

EP - 22341

JO - International Journal of Hydrogen Energy

JF - International Journal of Hydrogen Energy

SN - 0360-3199

IS - 59

ER -