Yoo, Yiseul Lee, Giseung Jeong, Min-Gi Jung, Hun-Gi Shin, Sunghee Byun, Dongjin Yim, Taeeun Lim, Hee-Dae 2024-01-19T13:01:02Z 2024-01-19T13:01:02Z 2021-10-21 2022-02 2095-4956 https://pubs.kist.re.kr/handle/201004/115810 Regulation of the Li2CO3 byproduct is the most critical challenge in the field of non-aqueous Li-O-2 batteries. Although considerable efforts have been devoted to preventing Li2CO3 formation, no approaches have suggested the ultimate solution of utilizing the clean Li2O2 reaction instead of that of Li2CO3. Even if extremely pure O-2 is used in a Li-O-2 cell, its complete elimination is impossible, eventually generating CO2 gas during charge. In this paper, we present the new concept of a CO2-adsorbent spongy electrode (CASE), which is designed to trap the evolved CO2 using adsorption materials. Various candidates composed of amine functional groups (-NH2) for capturing CO2 were screened, with quadrapurebenzylamine (QPBZA) exhibiting superior CO2-adsorbing ability among the proposed candidates. Accordingly, we fabricated the CASE by sandwiching QPBZA between porous carbon layers, which facilitated the transport of gaseous products. The new electrode was demonstrated to effectively capture the evolved CO2 during charge, therefore altering the reaction pathways to the ideal case. It is highly advantageous to mitigate the undesirable CO2 incorporation in the next discharge, resulting in improved cyclability. This novel concept of a CO2-sponging electrode provides an alternative route to the realization of practically meaningful Li-O-2 batteries. (C) 2021 Science Press and Dalian Institute of Chemical Physics, Chinese Academy of Sciences. Published by ELSEVIER B.V. and Science Press. English Elsevier BV CO2-adsorbent spongy electrode for non-aqueous Li-O-2 batteries Article 10.1016/j.jechem.2021.06.022 1 Journal of Energy Chemistry, v.65, pp.646 - 653 Journal of Energy Chemistry 65 646 653 Y scie scopus 000701807700004 2-s2.0-85111968042 Chemistry, Applied Chemistry, Physical Energy & Fuels Engineering, Chemical Chemistry Energy & Fuels Engineering Article CO2 CATHODE AMINES Li-O-2 battery Benzylamine CO2 adsorption Li2CO3 Li2O2 CO2-sponging electrode