Two-Phase Transition Induced Amorphous Metal Phosphides Enabling Rapid, Reversible Alkali-Metal Ion Storage
| العنوان: | Two-Phase Transition Induced Amorphous Metal Phosphides Enabling Rapid, Reversible Alkali-Metal Ion Storage |
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| المؤلفون: | Jun Chen, Limin Zhou, Liang Fang, Haihua Wang, Luojia Liu, Peixin Jiao, Yong-Mook Kang, Kai Zhang, Zhimeng Hao |
| المصدر: | ACS Nano. 15:13486-13494 |
| بيانات النشر: | American Chemical Society (ACS), 2021. |
| سنة النشر: | 2021 |
| مصطلحات موضوعية: | Phase transition, Amorphous metal, Materials science, General Engineering, General Physics and Astronomy, Sodium-ion battery, Alkali metal, Ion, Anode, Amorphous solid, Metal, Chemical engineering, visual_art, visual_art.visual_art_medium, General Materials Science |
| الوصف: | Metal phosphides as anode materials for alkali-metal ion batteries have captured considerable interest due to their high theoretical capacities and electronic conductivity. However, they suffer from huge volume expansion and element segregation during repetitive insertion/extraction of guest ions, leading to structure deterioration and rapid capacity decay. Herein, an amorphous Sn0.5Ge0.5P3 was constructed through a two-phase intermediate strategy based on the elemental composition modulation from two crystalline counterparts and applied in alkali-metal ion batteries. Differing from crystalline P-based compounds, the amorphous structure of Sn0.5Ge0.5P3 effectively reduces the volume variation from above 300% to 225% during cycling. The ordered distribution of cations and anions in the short-range ensures the uniform distribution of each element during cycles and thus contributes to durable cycling stability. Moreover, the long-range disordered structure of amorphous material shortens the ion transport distance, which facilitates diffusion kinetics. Benefiting from the aforementioned effects, the amorphous Sn0.5Ge0.5P3 delivers a high Na storage capacity of 1132 mAh g-1 at 0.1 A g-1 over 100 cycles. Even at high current densities of 2 and 10 A g-1, its capacities still reach 666 and 321 mAh g-1, respectively. As an anode for Li storage, the Sn0.5Ge0.5P3 similarly also exhibits better cycling stability and rate performance compared to its crystalline counterparts. Significantly, the two-phase transition strategy is generally applicable to achieving other amorphous metal phosphides such as GeP2. This work would be helpful for constructing high-performance amorphous anode materials for alkali-metal ion batteries. |
| تدمد: | 1936-086X 1936-0851 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2b772285213e427def2bb5309c6b4e1e https://doi.org/10.1021/acsnano.1c04041 |
| حقوق: | CLOSED |
| رقم الأكسشن: | edsair.doi.dedup.....2b772285213e427def2bb5309c6b4e1e |
| قاعدة البيانات: | OpenAIRE |
Find this issue from the American Chemical Society | تدمد: | 1936086X 19360851 |
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