期刊
CHEMSUSCHEM
卷 13, 期 10, 页码 2621-2627出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/cssc.201903297
关键词
batteries; carbon dioxide; electrocatalysis; formic acid; lithium
资金
- National Natural Science Foundation of China [21872147, 21501173, 21805277, 21601190]
- Natural Science Foundation of Fujian Province [2018J05030]
- National Key R&D Program of China [2016YFB0100100]
- Key Research Program of Frontier Sciences, CAS [ZDBS-LY-SLH028]
- Strategic Priority Research Program, CAS [XDB20000000]
Metal-CO2 batteries, an attractive technology for both energy storage and CO2 utilization, are typically classified into organic Li(Na)-CO2 batteries with a high energy density/output voltage and aqueous Zn-CO2 batteries with flexible chemical production. However, achieving both high-efficiency energy storage and flexible chemical production is still challenging. In this study, a reversible hybrid aqueous Li-CO2 battery is developed, integrating Li with an aqueous phase, which exhibits not only a high operating voltage and energy density but also highly selective formic acid production. Based on a Li plate as the anode, NaCl solution as the aqueous electrolyte, solid electrolyte Li1.5Al0.5Ge1.5P3O12 (LAGP) as a separator and Li+ transporter, and a bifunctional Pd-based electrocatalyst as the cathode, the resulting battery shows a high discharge voltage of up to 2.6 V, an outstanding energy conversion efficiency of above 80 %, and remarkable selectivity of CO2-to-HCOOH conversion of up to 97 %. The related reaction mechanism is proposed as CO2+2 Li+2 H+ reversible arrow HCOOH+2 Li+.
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