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http://hdl.handle.net/10397/107434
Title: | A freestanding, dissolution- and diffusion-limiting, flexible sulfur electrode enables high specific capacity at high mass loading | Authors: | Guo, Q Wang, C Shang, J Yang, Y Xie, C Luo, Y Rong, M Pei, Y Gao, Y Zheng, Z |
Issue Date: | 20-Jun-2024 | Source: | Advanced materials, 20 June 2024, v. 36, no. 25, 2400041 | Abstract: | The acquisition of stable and high-areal-capacity S cathodes over 10 mA h cm−2 is a critical and indispensable step to realize the high energy density configuration. However, increasing the areal capacity of S cathodes often deteriorates the specific capacity and stability due to the aggravated dissolution of S and diffusion of solvable polysulfides in the thick electrode. Herein, the design of a freestanding composite cathode that leverages 3D covalent binding sites and chemical adsorption environment to offer dissolution-limiting and diffusion-blocking functions of S species is reported. By employing this architecture, the coin cell exhibits excellent cycling stability and an exceptional specific capacity of 1444.3 mA h g−1 (13 mA h cm−2), and the pouch cell configuration manifests a noteworthy areal capacity exceeding 11 mA h cm−2. This performance is coupled with excellent flexibility, demonstrated through consecutive bending cycle tests, even at a sulfur loading of 9.00 mg cm−2. This study lays the foundation for the development of flexible Li–S batteries with increased loading capacities and exceptional performance. | Keywords: | Diffusion-blocking Dissolution-limiting Flexibility Lithium-sulfur battery Thick sulfur electrode |
Publisher: | Wiley-VCH | Journal: | Advanced materials | ISSN: | 0935-9648 | EISSN: | 1521-4095 | DOI: | 10.1002/adma.202400041 | Rights: | © 2024 The Authors. Advanced Materials published by Wiley-VCH GmbH. This is an open access article under the terms of the Creative Commons Attribution-NonCommercial License (https://creativecommons.org/licenses/by-nc/4.0/), which permits use,distribution and reproduction in any medium, provided the original work is properly cited and is not used for commercial purposes. The following publication Q. Guo, C. Wang, J. Shang, Y. Yang, C. Xie, Y. Luo, M. Rong, Y. Pei, Y. Gao, Z. Zheng, A Freestanding, Dissolution- and Diffusion-Limiting, Flexible Sulfur Electrode Enables High Specific Capacity at High Mass Loading. Adv. Mater. 2024, 36, 2400041 is available at https://doi.org/10.1002/adma.202400041. |
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Guo_Freestanding_Dissolution_Diffusion‐Limiting.pdf | 4.15 MB | Adobe PDF | View/Open |
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