Electrostatic Covalent Organic Frameworks as On-Demand Molecular Traps for High-Energy Li Metal Battery Electrodes
- Authors
- Kyeong-Seok Oh; Park Sodam; Kim Jae-Seung; Yao Ying; Kim Jung-Hui; Guo Jia; Seo Dong-Hwa; Lee Sang-Young
- Issue Date
- May-2023
- Publisher
- AMER CHEMICAL SOC
- Citation
- ACS ENERGY LETTERS, v.8, no.5, pp 2463 - 2474
- Pages
- 12
- Journal Title
- ACS ENERGY LETTERS
- Volume
- 8
- Number
- 5
- Start Page
- 2463
- End Page
- 2474
- URI
- https://yscholarhub.yonsei.ac.kr/handle/2021.sw.yonsei/6788
- DOI
- 10.1021/acsenergylett.3c00600
- ISSN
- 2380-8195
- Abstract
- Regulating electrostatic interactions between charged molecules is crucial for enabling advanced batteries with electrochemical reliability. To address this issue, herein, we present a class of electrostatic covalent organic frameworks (COFs) as on-demand molecular traps for high-energy-density Li metal batteries (LMBs). A bipyridine-based COF and its quaternized derivative are synthesized and incorporated into LiNi0.8Co0.1Mn0.1O2 (NCM811) cathodes and Li metal protective layers, respectively. These COF molecular traps are effective in chelating transition metal ions dissolved from the cathodes, enhancing Li+ desolvation, suppressing solvent decomposition, and immobilizing anions of electrolytes. The resulting LMB with the COF molecular traps fully utilizes the theoretical specific capacity of NCM811 at cathodes and allows stable Li plating/ stripping at anodes. A pouch-type LMB full cell with the COF molecular traps provides high gravimetric/volumetric energy densities (466.7 Wh k(gcell)( -1)/1370.1 Wh L-cell(-1)) under a constrained cell configuration, exceeding those of previously reported Li metal batteries based on porous crystalline frameworks.
- Files in This Item
-
- Appears in
Collections - College of Engineering > Chemical Engineering > 1. Journal Articles
Items in Scholar Hub are protected by copyright, with all rights reserved, unless otherwise indicated.