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Liquid electrolyte-free cathode for long-cycle life lithium–oxygen batteries

Title
Liquid electrolyte-free cathode for long-cycle life lithium–oxygen batteries
Authors
Choi, YoungbinMoon, JanghyukYun, JonghyeokJung, Kyu-NamMoon, Ji-WoongLee, Jong-Won
DGIST Authors
Choi, Youngbin; Moon, Janghyuk; Yun, Jonghyeok; Jung, Kyu-Nam; Moon, Ji-Woong; Lee, Jong-Won
Issue Date
2021-09
Citation
Chemical Engineering Journal, 420, 129840
Type
Article
Author Keywords
Carbon nanotubeDuplex structureLithium–oxygen batterySinteringSolid electrolyte
Keywords
AnodesCarbon nanotubesCathodesGold nanoparticlesLithiumLithium batteriesOxygenSolid electrolytesYarnCycle livesCycling stabilityDuplex structuresLi$++$Li-anodesLiquid electrolytesLithium/oxygen batteriesLong cyclesOrganic liquid electrolytesSolid membraneSintering
ISSN
1385-8947
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.
URI
http://hdl.handle.net/20.500.11750/15512
DOI
10.1016/j.cej.2021.129840
Publisher
Elsevier BV
Related Researcher
  • Author Lee, Jong-Won Laboratory for Electrochemical Energy Materials and Interfaces
  • Research Interests 이차전지, 연료전지, 재료전기화학, 나노에너지소재
Files:
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Collection:
Department of Energy Science and EngineeringLaboratory for Electrochemical Energy Materials and Interfaces1. Journal Articles


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