Rechargeable Zn-CO2 Electrochemical Cells Mimicking Two-Step Photosynthesis
Rechargeable Zn-CO2 Electrochemical Cells Mimicking Two-Step Photosynthesis
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模拟两步光合作用的可充电 Zn-CO2 电化学电池
DOI：
10.1002/adma.201807807
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发表时间：
2019
影响因子：
29.4
通讯作者：
Jiannian Yao
中科院分区：
文献类型：
--
作者：
Xueyuan Wang;Jiafang Xie;Muhammad Arsalan Ghausi;Jiangquan Lv;Yiyin Huang;Maoxiang Wu;Yaobing Wang;Jiannian Yao
金属-CO2电池代表了可持续能源和环境的一个有前途的优先事项。然而，CO2在非水电解质中的利用大多涉及困难的CO2电化学，导致选择性差和有限的循环性能。本文中，可调节地产生CO燃料气体的水性可再充电Zn-CO2电化学电池（90%法拉第效率）（阴极反应：CO2+ 2 e −+2 H +→ CO + H2O）和O2在电池充电过程中，电压为102 V（阴极反应：H2O → 1/2O2+ 2e−+ 2H+），模拟光合作用过程中CO2固定和水氧化的单独步骤，同时表现出高效、可调产物的优点，并且提出并实现了独立于太阳光的操作。该电池实现了68%的显着能源效率与燃料发电，提供了一个替代的绿色，高效，安全利用CO2的金属-CO2电池。
Metal–CO2batteries represent a promising priority for sustainable energy and the environment. However, CO2utilization in nonaqueous electrolytes mostly involves difficult CO2electrochemistry, leading to poor selectivity and limited cycle performance. Herein, an aqueous rechargeable Zn–CO2electrochemical cell that tunably produced CO fuel gas (90% Faradaic efficiency) during cell discharge (cathodic reaction: CO2+ 2e−+ 2H+→ CO + H2O) and O2during cell charge at ≈2 V (cathodic reaction: H2O → 1/2O2+ 2e−+ 2H+), mimicking the separate steps of CO2fixation and water oxidation during photosynthesis while exhibiting the advantages of high efficiency, tunable products, and operation independent of sunlight is proposed and realized. The cell achieves a remarkable energy efficiency of 68% with fuel generation, providing an alternative for the green, efficient, and safe utilization of CO2by metal–CO2batteries.