Effect of Componential Proportion in Bimetallic Electrocatalysts on the Aprotic Lithium‐Oxygen Battery Performance,Advanced Energy Materials

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Effect of Componential Proportion in Bimetallic Electrocatalysts on the Aprotic Lithium‐Oxygen Battery Performance
Advanced Energy Materials ( IF 24.4 ) Pub Date : 2018-04-14 , DOI: 10.1002/aenm.201703230
Xiangyi Luo ₁ , Le Ge ₁ , Lu Ma ₂ , Arthur J. Kropf ₁ , Jianguo Wen ₃ , Xiaobing Zuo ₂ , Yang Ren ₂ , Tianpin Wu ₂ , Jun Lu ₁ , Khalil Amine _{1,

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Affiliation

Rechargeable lithium‐oxygen (Li‐O₂) batteries are one of the most promising technologies for next‐generation energy storage, which is also a critical part of the future renewable energy portfolio; however, its commercialization is still hindered by several challenges. The high charge overpotential, in particular, not only causes problems by increasing the possibility of electrolyte decomposition but also induces a low round‐trip efficiency and coulombic efficiency. Here, by choosing the right component proportion in Pt‐Cu bimetallic electrocatalysts that optimize electrocatalytic activity of electrochemical reactions, especially of oxygen evolution reactions, a superior electrochemical behavior is demonstrated, with a low charge overpotential of 0.2 V and cycleability of 50 discharge/charge cycles before capacity fading. The optimized Pt‐Cu bimetallic electrocatalysts significantly reduce the charge overpotential and furthermore enhance the efficiency, stability, and cycleability of an aprotic Li‐O₂ battery.

中文翻译：

双金属电催化剂中组分比例对非质子锂氧电池性能的影响

可充电锂氧（Li-O ₂）电池是下一代储能最有前途的技术之一，也是未来可再生能源产品组合的关键部分；但是，它的商业化仍然受到一些挑战的阻碍。高电荷超电势不仅会通过增加电解质分解的可能性而引起问题，而且会导致往返效率和库仑效率较低。在这里，通过在Pt-Cu双金属电催化剂中选择合适的成分比例来优化电化学反应（尤其是氧气释放反应）的电催化活性，可以显示出优异的电化学行为，具有0.2 V的低电荷超电势和50次放电/充电的循环能力容量衰减之前的周期。_2块电池。

更新日期：2018-04-14

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