التفاصيل البيبلوغرافية
| العنوان: |
Layered porous Mn0.18V2O5@C with manganese and carbon provided by a metal-organic frame-work precursor as a cathode material for aqueous zinc-ion batteries. |
| المؤلفون: |
Tiantian Chen, Xixun Shen, Bingbing Dai, Qunjie Xu |
| المصدر: |
Dalton Transactions: An International Journal of Inorganic Chemistry; 10/14/2023, Vol. 52 Issue 38, p13797-13807, 11p |
| مصطلحات موضوعية: |
CATHODES, ELECTRIC conductivity, ZINC ions, ELECTRIC batteries, MANGANESE, METAL-organic frameworks, ALKALINE batteries, CHARGE transfer, POROUS metals |
| مستخلص: |
At present, vanadium-based cathodes for aqueous zinc-ion batteries (AZIBs) are limited by their slow reaction kinetics, poor electrical conductivity, and low capacity retention. To overcome these problems, here, we design a layered porous Mn0.18V2O5@C as the cathode material for AZIBs using a manganesecontaining metal-organic framework as a template through a simple solvothermal method. Such an electrode delivers an excellent specific capacity (380 mA h g-1 at 0.1 A g-1) accompanied by superior cycling stability (about 85% capacity retention for 2000 cycles at 6 A g-1). The excellent electrochemical performance of Mn0.18V2O5@C is ascribed to the improved interface activity including smooth zinc ion transport, abundant ion reaction active sites and accelerated charge transfer resulting from the coordination of the porous structure, doped conductive carbon, and the stable channel structure derived from the pillar effect of doping manganese ions, preventing a premature collapse of the electrode structure. It is also revealed by structural evolution analysis that the residual zinc ions also combine with the original Mn0.18V2O5 to form a ZnxMnyV2O5 phase, which serves as an additional structural pillar and in the meantime, also participates in the following cycles. These favorable electrochemical results suggest that Mn0.18V2O5@C is a suitable cathode material for AZIBs. [ABSTRACT FROM AUTHOR] |
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| قاعدة البيانات: |
Complementary Index |
