| Autor: |
Junjie Xu, Rui Tang, Minghui Liu, Shuai Xie, Dawei Zhang, Xianghua Kong, Song Jin, Hengxing Ji, Tierui Zhang |
| Jazyk: |
angličtina |
| Rok vydání: |
2022 |
| Předmět: |
|
| Zdroj: |
Batteries, Vol 8, Iss 11, p 200 (2022) |
| Druh dokumentu: |
article |
| ISSN: |
2313-0105 |
| DOI: |
10.3390/batteries8110200 |
| Popis: |
The lithium–sulfur battery is one of the next-generation rechargeable battery candidates due to its high theoretical energy density and low cost. However, the sluggish conversion kinetics of soluble lithium polysulfides into insoluble Li2S2/Li2S leads to low sulfur utilization, retarded rate responses, and rapid capacity decay. Here, we enhance the sulfur reduction kinetics by designing and synthesizing a lamellar-structured NiFeLDH and reduced graphene oxide (rGO) composite. The assembly of a two-dimensional NiFeLDH with rGO, which has high conductivity and electrocatalytic activity, significantly enhances the electrochemical steps of sulfur reduction. The S@NiFeLDH/rGO cathode delivers an initial discharge capacity of 1014 mAh g−1 at 0.2 C and a capacity of 930 mAh g−1 after 100 cycles at 0.2 C. Even at a high current density of 1 C, the S@NiFeLDH/rGO could maintain a high capacity of 554 mAh g−1 after 400 cycles. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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