Donor doping into a mother material with disordered intrinsic oxygen vacancies can enhance the conductivity and stability of perovskite-type proton conductors at intermediate and low temperatures. This approach provides a new design direction for proton conductors for fuel cells and electrolysis cells. Protonic ceramic (or proton conducting) fuel/electrolysis cells directly convert chemical energy into electricity with zero emissions at low or intermediate temperatures. However, there have been no reports of proton conductors with both high conductivity and stability at these temperatures. Researchers from Tokyo Tech have proposed a new strategy using donor doping to revolutionize the design and development of proton conductors. They demonstrated that BSM20 exhibited exceptionally high proton conductivity and stability, paving the way for new proton conductors for fuel/electrolysis cells with unprecedented performance. The discovery of BSM20 could have a significant impact on energy and environmental science and technology, opening doors to a greener future.

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