| Autor: |
Wang, Dan, Ma, Qun, Tian, Kang-hui, Duan, Chan-Qin, Wang, Zhi-yuan, Liu, Yan-guo |
| Zdroj: |
International Journal of Minerals, Metallurgy & Materials; Oct2021, Vol. 28 Issue 10, p1666-1674, 9p |
| Abstrakt: |
Ultrafine nano-scale Cu2Sb alloy confined in a three-dimensional porous carbon was synthesized using NaCl template-assisted vacuum freeze-drying followed by high-temperature sintering and was evaluated as an anode for sodium-ion batteries (SIBs) and potassium-ion batteries (PIBs). The alloy exerts excellent cycling durability (the capacity can be maintained at 328.3 mA·h·g−1 after 100 cycles for SIBs and 260 mA·h·g−1 for PIBs) and rate capability (199 mA·h·g−1 at 5 A·g−1 for SIBs and 148 mA·h·g−1 at 5 A·g−1 for PIBs) because of the smooth electron transport path, fast Na/K ion diffusion rate, and restricted volume changes from the synergistic effect of three-dimensional porous carbon networks and the ultrafine bimetallic nanoalloy. This study provides an ingenious design route and a simple preparation method toward exploring a high-property electrode for K-ion and Na-ion batteries, and it also introduces broad application prospects for other electrochemical applications. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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