Abstract
Lithium-sulfur (Li-S) batteries have attracted considerable attention due to their high energy density (2600 Wh kg−1). However, its commercialization is hindered seriously by the low loading and utilization rate of sulfur cathodes. Herein, we designed the cellulose-based graphene carbon composite aerogel (CCA) self-standing electrode to enhance the performance of Li-S batteries. The CCA contributes to the mass loading and utilization efficiency of sulfur, because of its unique physical structure: low density (0.018 g cm−3), large specific surface area (657.85 m2 g−1), high porosity (96%), and remarkable electrolyte adsorption (42.25 times). Compared to Al (about 49%), the CCA displayed excellent sulfur use efficiency (86%) and could reach to high area capacity of 8.60 mAh cm−2 with 9.11 mg S loading. Meanwhile, the CCA exhibits the excellent potential for pulse sensing applications due to its flexibility and superior sensitivity to electrical response signals.
Original language | English |
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Pages (from-to) | 803-811 |
Number of pages | 9 |
Journal | Science Bulletin |
Volume | 65 |
Issue number | 10 |
DOIs | |
State | Published - 30 May 2020 |
Externally published | Yes |
Keywords
- Cellulose-based graphene aerogel
- High sulfur loading
- Lithium-sulfur battery
- Pulse sensing
- Self-standing electrode