التفاصيل البيبلوغرافية
| العنوان: |
Dual-Type Carbon Confinement Strategy: Improving the Stability of CoTe 2 Nanocrystals for Sodium-Ion Batteries with a Long Lifespan |
| المؤلفون: |
Weiming Zhao (645552), Wei Zhang (405), Yixi Lei (12025345), Lixiang Wang (414945), Gaoyu Wang (8085935), Jiawei Wu (566422), Wenbo Fan (590902), Shaoming Huang (1328016) |
| سنة النشر: |
2022 |
| المجموعة: |
Smithsonian Institution: Digital Repository |
| مصطلحات موضوعية: |
Biophysics, Biochemistry, Medicine, Biotechnology, Evolutionary Biology, Developmental Biology, Biological Sciences not elsewhere classified, Chemical Sciences not elsewhere classified, term cycling performance, rational structural design, porous carbon matrix, inner carbon scaffold, high reversible capacity, high energy density, hierarchical carbon matrix, ex situ <, 9 mah cm, advanced rechargeable batteries, 2500 cycles ), 5 mah cm, 1 mah g, 5 mah g, long lifespan sodium, 2 , ion batteries, 200 cycles, volume expansion, valuable strategy, storage mechanism, sodium insertion |
| الوصف: |
Sodium-ion batteries have great potential to become large-scale energy storage devices due to their abundant and low-cost resources. However, the lack of anode and cathode materials with both high energy density and long-term cycling performance significantly affects their commercial applications. In this work, uniform CoTe 2 nanoparticles are generated from the tellurization of Co nanoparticles, which were coated with polyvinylpyrrolidone in a three-dimensional (3D) porous carbon matrix (CoTe 2 @3DPNC). Finally, a dual-type carbon confinement structure is formed after tellurization during which citric acid is adopted as the source of the inner carbon scaffold. The hierarchical carbon matrix not only builds a robust and fast ion/electronic conductive 3D architecture but also mitigates the volume expansion and aggregation of CoTe 2 during sodium insertion/extraction. Remarkably, the CoTe 2 @3DPNC electrode displays a high reversible capacity (216.5 mAh g –1 /627.9 mAh cm –3 at 0.2 A g –1 after 200 cycles) and outstanding long-term cycling performance (118.1 mAh g –1 /342.5 mAh cm –3 even at 5.0 A g –1 after 2500 cycles). Kinetics tests and capacitance calculations clearly reveal a battery-capacitive dual-model Na-storage mechanism. Furthermore, ex situ XRD/SEM/TEM demonstrate superior stability during sodium insertion/extraction. This work provides a valuable strategy for the rational structural design of long-life electrodes for advanced rechargeable batteries. |
| نوع الوثيقة: |
article in journal/newspaper |
| اللغة: |
unknown |
| Relation: |
https://figshare.com/articles/journal_contribution/Dual-Type_Carbon_Confinement_Strategy_Improving_the_Stability_of_CoTe_sub_2_sub_Nanocrystals_for_Sodium-Ion_Batteries_with_a_Long_Lifespan/19100008 |
| DOI: |
10.1021/acsami.1c22486.s001 |
| الاتاحة: |
https://doi.org/10.1021/acsami.1c22486.s001 |
| Rights: |
CC BY-NC 4.0 |
| رقم الانضمام: |
edsbas.FC0F9C02 |
| قاعدة البيانات: |
BASE |