| Autor: |
Mullaivananathan, V., Saravanan, KR., Kalaiselvi, N. |
| Předmět: |
|
| Zdroj: |
JOM: The Journal of The Minerals, Metals & Materials Society (TMS); Sep2017, Vol. 69 Issue 9, p1497-1502, 6p, 4 Graphs |
| Abstrakt: |
The inherent drawbacks of CoSnO in demonstrating the closer-to-theoretical capacity value behavior and the inadmissible volume-expansion-related capacity fade behavior have been surpassed by choosing a tailor-made material composition of CoSnO/SnO, prepared at two different temperatures such as 400°C and 600°C to obtain residual carbon-containing and carbon-free compositions, respectively. Among the products, carbon-coated CoSnO/SnO composite exhibits better electrochemical performance compared with that of the carbon-free product mainly because of the beneficial effect of carbon in accommodating the volume-expansion-related issues arising from the alloying/de-alloying mechanism. A combination of conversion reaction and alloying/de-alloying mechanism is found to play a vital role in exhibiting closer-to-theoretical capacity values. In other words, an appreciable specific capacity value of 834 mAh g has been exhibited by CoSnO/SnO anode containing carbon coating, thus, demonstrating the possibility to improve the electrochemical performance of the title anode through carbon coating, which is realized as a result of the addition of carefully manipulated synthesis conditions. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
|
Full text from SpringerLink