Li-CO2 Electrochemistry: A New Strategy for CO2 Fixation and Energy Storage
Li-CO2 Electrochemistry: A New Strategy for CO2 Fixation and Energy Storage
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Li-CO2 电化学：二氧化碳固定和储能的新策略
DOI：
10.1016/j.joule.2017.07.001
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发表时间：
2017-10-11
期刊：
影响因子：
39.8
通讯作者：
Zhou, Haoshen
中科院分区：
文献类型：
--
作者：
Qiao, Yu;Yi, Jin;Zhou, Haoshen
传统的CO2固定需要大量的能量，导致更多的CO2排放和额外的污染物。近年来，将可再生能源与CO2固定相结合作为一种可持续发展战略越来越受到关注。在这里，基于对非质子Li-CO2电化学的系统研究，我们首先提供了一种用于CO2固定或能量存储的替代策略。这两种策略都具有相同的CO2还原过程，即Li 2CO 3和碳的形成。随后，通过可再充电/不可逆氧化过程实现CO2固定，在此过程中，Li 2CO 3分解，而获得的碳保持固定。此外，可逆Li-CO2电池系统已经实现了基于使用Ru催化剂的所得碳和Li 2CO 3的共氧化。因此，通过阐明非质子Li-CO2电化学的基本反应机制，本文提出的概念证明为开发CO2固定和Li-CO2储能的灵活路线提供了强有力的理论基础。
Large energy is required for traditional CO2 fixation, leading to more CO2 emission and additional pollutants. Recently, integrating renewable energy with CO2 fixation has attracted increasing attention as a sustainable strategy. Here, based on a systematic investigation on aprotic Li-CO2 electrochemistry, we first provide an alternative strategy for either CO2 fixation or energy storage. Both strategies share the same CO2 reduction process with the formation of Li2CO3 and carbon. Subsequently, CO2 fixation is achieved through a rechargeable/irreversible oxidation process, during which Li2CO3 is decomposed, while the carbon obtained remains fixed. Moreover, a reversible Li-CO2 battery system has been realized based on co-oxidization of the resulting carbon and Li2CO3 using a Ru catalyst. Consequently, by shedding light on the fundamental reaction mechanism of aprotic Li-CO2 electrochemistry, the proof of concept presented here provides strong theoretical underpinning for developing flexible routes for both CO2 fixation and Li-CO2 energy storage.