| Autor: |
Li, Lan, Ren, Ruiyin, Wang, Xinxi, Lang, Xiaoshi, Xu, Tianye, Sun, Ping, Qi, Xueying, Cai, Kedi |
| Předmět: |
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| Zdroj: |
International Journal of Energy Research; Feb2022, Vol. 46 Issue 2, p1361-1369, 9p |
| Abstrakt: |
Summary: In this paper, a type of high‐performance nanostructure Fe2O3 (Fe2O3‐arc) is synthesized via a novel direct current electric arc method and employed as a sulfur‐wrapping matrix for lithium‐sulfur batteries. Scanning electron microscopy reveals Fe2O3‐arc has a granular morphology and the crystal size can be controlled below 100 nm. X‐ray diffraction patterns and Raman spectrums show that Fe2O3‐arc displays obvious confusion, but continues to have a typical Fe2O3 crystal structure with preferentially growing on the (110) crystal plane. After sulfur loading, stable physical entrapment and chemical interaction can be established between sulfur and Fe2O3‐arc matrix. The electrochemical test indicates the sulfur composite cathode with Fe2O3‐arc as matrix at the loading mass ratio to 1:3 has a stable and conventional sulfur electrochemical process. The initial discharge specific capacities can achieve 720.59, 653.79 and 540.32 mAh.g−1 at 0.1, 0.2 and 0.5 C current rates, respectively. And after 200 cycles, the capacity retention rate can be at 62.23%. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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