Rechargeable Al-CO<sub>2</sub> Batteries for Reversible Utilization of CO<sub>2</sub>.
basic_science · Level V
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- Record sourced from PubMed, PMID 29782673.
- Also identified by DOI 10.1002/adma.201801152.
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Abstract
The excessive emission of CO<sub>2</sub> and the energy crisis are two major issues facing humanity. Thus, the electrochemical reduction of CO<sub>2</sub> and its utilization in metal-CO<sub>2</sub> batteries have attracted wide attention because the batteries can simultaneously accelerate CO<sub>2</sub> fixation/utilization and energy storage/release. Here, rechargeable Al-CO<sub>2</sub> batteries are proposed and realized, which use chemically stable Al as the anode. The batteries display small discharge/charge voltage gaps down to 0.091 V and high energy efficiencies up to 87.7%, indicating an efficient battery performance. Their chemical reaction mechanism to produce the performance is revealed to be 4Al + 9CO<sub>2</sub> ↔ 2Al<sub>2</sub> (CO<sub>3</sub> )<sub>3</sub> + 3C, by which CO<sub>2</sub> is reversibly utilized. These batteries are envisaged to effectively and safely serve as a potential CO<sub>2</sub> fixation/utilization strategy with stable Al.