• Synthesis of high-entropy perovskite oxide for air electrode in reversible proton ceramic electrochemical cells.

• Triple-conducting high-entropy air electrodes exhibit excellent structural stability and oxygen catalytic activity.

• The peak power density and current density of the cell with high-entropy air electrode in the fuel cell and electrolysis modes are 1.21 W cm⁻² and − 1.95 A cm⁻² at 600 °C, respectively.

中文翻译：

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高熵钙钛矿氧化物：为可逆质子陶瓷电化学电池开发高活性和耐用空气电极的新机遇

• 用于可逆质子陶瓷电化学电池空气电极的高熵钙钛矿氧化物的合成。

• 三导电高熵空气电极表现出优异的结构稳定性和氧催化活性。

• 在燃料电池和电解模式下，具有高熵空气电极的电池在 600 °C 时的峰值功率密度和电流密度分别为 1.21 W cm ^-2和 - 1.95 A cm ^{-2 。}