Liquid electrolyte-free cathode for long-cycle life lithium–oxygen batteries
- Authors
- Choi, Youngbin; Moon, Janghyuk; Yun, Jonghyeok; Jung, Kyu-Nam; Moon, Ji-Woong; Lee, Jong-Won
- Issue Date
- Sep-2021
- Publisher
- Elsevier B.V.
- Keywords
- Carbon nanotube; Duplex structure; Lithium–oxygen battery; Sintering; Solid electrolyte
- Citation
- Chemical Engineering Journal, v.420
- Journal Title
- Chemical Engineering Journal
- Volume
- 420
- URI
- https://scholarworks.bwise.kr/cau/handle/2019.sw.cau/54358
- DOI
- 10.1016/j.cej.2021.129840
- ISSN
- 1385-8947
1873-3212
- Abstract
- Ether-based organic liquid electrolytes (OLEs) have been commonly used in lithium–oxygen batteries (LOBs); however, they become unstable and cause rapid performance degradation during LOB operation. To address these problems, in this study we propose an OLE-free cathode architecture based on a Li+-selective solid membrane (LSSM). An LSSM with a seamless duplex (dense/porous) architecture is prepared by a tape casting process combined with co-sintering, and carbon nanotubes (CNTs) decorated with Au nanoparticles (CNT@Au) are directly formed on its porous framework. We show that the duplex-LSSM can effectively protect the metallic Li anode from parasitic reactions with impurity species and improve the cycling stability of Li. Furthermore, an LOB assembled with the duplex-LSSM and CNT@Au components exhibits a discharge capacity as high as 3650 mAh g−1 and improved cycling stability (>140 cycles) compared to a conventional OLE-based LOB; this can be explained in terms of the combined advantages provided by the OLE-free cathode and the LSSM-protected Li anode. © 2021 Elsevier B.V.
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Collections - College of Engineering > School of Energy System Engineering > 1. Journal Articles
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