دورية أكاديمية
Conversion mechanism of NiCo2Se4 nanotube sphere anodes for potassium-ion batteries
| العنوان: | Conversion mechanism of NiCo2Se4 nanotube sphere anodes for potassium-ion batteries |
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| المؤلفون: | Mingyue Wang, Yang Li, Shanshan Yao, Jiang Cui, Lianbo Ma, Nauman Mubarak, Hongming Zhang, Shujiang Ding, Jang-Kyo Kim |
| المصدر: | Energy Materials and Devices, Vol 1, Iss 1, p 9370001 (2023) |
| بيانات النشر: | Tsinghua University Press, 2023. |
| سنة النشر: | 2023 |
| المجموعة: | LCC:Production of electric energy or power. Powerplants. Central stations |
| مصطلحات موضوعية: | bimetallic selenide nanotubes, potassium-ion storage, conversion reaction mechanism, density functional theory (dft) calculations, Energy conservation, TJ163.26-163.5, Production of electric energy or power. Powerplants. Central stations, TK1001-1841 |
| الوصف: | Given the abundance of potassium resources, potassium-ion batteries are considered a low-cost alternative to lithium-ion types. However, their electrochemical performance remains rather unsatisfactory because potassium ions have sluggish kinetics and large ionic radius. In this study, NiCo2Se4 nanotube spheres are synthesized as efficient potassium storage hosts via a facile two-step hydrothermal process. The rationally designed electrode has various ameliorating morphological and functional features, including the following: (i) A hollow structure allows for relief of the volume expansion while offering an excellent electrochemical reactivity to accelerate the conversion kinetics; (ii) a high electrical conductivity for enhanced electron transfer; and (iii) myriad vacancies to supply active sites for electrochemical reactions. As such, the electrode delivers an initial reversible capacity of 458.1 mAh g−1 and retains 346.6 mAh g−1 after 300 cycles at 0.03 A g−1. The electrode sustains a high capacity of 101.4 mAh g−1 even at a high current density of 5 A g−1 and outperforms the majority of state-of-the-art anodes in terms of both cyclic capacity and rate capability, especially at above 1.0 A g−1. This study not only proves bimetallic selenides are promising candidates for potassium storage devices but also offers new insight into the rational design of electrode materials for high-rate potassium-ion batteries. |
| نوع الوثيقة: | article |
| وصف الملف: | electronic resource |
| اللغة: | English |
| تدمد: | 3005-3315 3005-3064 |
| Relation: | https://www.sciopen.com/article/10.26599/EMD.2023.9370001; https://doaj.org/toc/3005-3315; https://doaj.org/toc/3005-3064 |
| DOI: | 10.26599/EMD.2023.9370001 |
| URL الوصول: | https://doaj.org/article/a5bc0d3574df4d2fa85e30652b7de763 |
| رقم الأكسشن: | edsdoj.5bc0d3574df4d2fa85e30652b7de763 |
| قاعدة البيانات: | Directory of Open Access Journals |
Full Text Finder | تدمد: | 30053315 30053064 |
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| DOI: | 10.26599/EMD.2023.9370001 |