Wang, Jian and Cui, Jing and Li, Zhaojin and Zhang, Di and Sun, Huilan and Wang, Huan and Wang, Qiujun and Woo, Haw Jiunn and Wang, Bo (2023) Polysulfide-derived anion heterogeneous interfaces engineering to facilitate high-efficiency sodium ion storage. Chemical Engineering Journal, 464. ISSN 1385-8947, DOI https://doi.org/10.1016/j.cej.2023.142764.
Full text not available from this repository.Abstract
Poor structural stability and inherent low conductivity of the transition metal polysulfides often trigger continuous capacity decay. Here, an anionic heterogeneous modification engineering of the VS4 system is ach-ieved by employing one-step strategy. The prepared layered V1.11S2/V1.13Se2/C heterostructure (VSSe/C) ex-hibits expanded layer distance (5.926 A) and improved metallicity properties. Furthermore, the constructed built-in electric field achieves lower free energy and effective adsorption of reaction products. Resultantly, when applied to the sodium-ion battery anode, a high specific capacity of 784.9 mA h g-1 is achieved with 500 cycles at a current density of 2 A g-1. Impressively, a high capacity retention of 553.2 mA h g-1 is performed after 1000 cycles at 10 A g(-1), which is significantly better than the unmodified VS4 electrode. Additionally, the assembled sodium ion capacitor exhibits excellent energy densities of 89.1 W h kg(-)1 at 380 W kg(-1) and an ultra-high capacity retention rate of 96.6% over 2000 cycles at a high power density of 3800 W kg(-1). Ex-situ XRD and XPS results reveal a stable disulfide/selenide conversion process, and no intermediate polysulfide formation. The design of anionic heterostructures using polysulfide derivatives may provide a reference for improving the structural properties of anion-rich based anode materials.
| Item Type: | Article |
|---|---|
| Funders: | National Natural Science Foundation of China [22008053, 52002111], Natural Science Foundation of Hebei Province [B2021208061, B2022208006, E2022208023], Ministry of Higher Education of Malaysia for the Fundamental Research Grant [FRGS/1/2018/STG02/UM/02/10], University of Malaya [GPF 038B-2018] |
| Uncontrolled Keywords: | Anionic heterostructure; Polysulfide derivatives; Structure desing; Built-in electric field; V1; 13Se2; C |
| Subjects: | Q Science > QD Chemistry T Technology > TP Chemical technology |
| Divisions: | Faculty of Science > Department of Physics |
| Depositing User: | Ms Zaharah Ramly |
| Date Deposited: | 12 Jun 2024 00:57 |
| Last Modified: | 12 Jun 2024 00:57 |
| URI: | http://eprints.um.edu.my/id/eprint/38307 |
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