High loading cotton cellulose-based aerogel self-standing electrode for Li-S batteries

• 来源期刊: 科学通报（英文版）
• 年，卷（期）: 2020,（10）
• 页码范围: 803-811
• 页数: 9页
• 语种: 英文

摘要

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.