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贝类和蜘蛛网启发了高面积容量的SPAN电极
Weijing Zuo1, Yawei Guo1, Chi Zhang1
1CAS Key Laboratory of Green Process and Engineering, Beijing Key Laboratory of Ionic Liquids Clean Process, State Key Laboratory of Multiphase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, Beijing, 100190, P. R. China.
Small (Weinheim an der Bergstrasse, Germany)
|December 26, 2023
概括
使用聚多巴胺 (PDA) 和碳纳米管 (SWCNT) 开发了用于硫电池 (LSB) 的高负荷硫化聚烯 (SPAN) 电极. 这种方法提高了电极完整性,并使LSB具有高面积容量和稳定的循环性能.
科学领域:
- 材料科学 材料科学 材料科学
- 电化学 电化学 电化学
- 储能 储能 储能 储能 储能 储能
背景情况:
- 硫电池 (LSB) 提供高能量密度,但在电极准备方面面临挑战.
- 硫化聚烯二 (SPAN) 由于稳定性和成本效益,对LSB来说是有前途的.
- 在SPAN电极中实现高活性物质 (AM) 负载仍然是一个重大障碍.
研究的目的:
- 开发一种用于 LSB 的高负荷 SPAN 电极的简单方法.
- 改进基于SPAN的LSB的电化学性能和循环稳定性.
- 为了利用涂层材料和导电添加剂之间的协同效应,提高电极完整性.
主要方法:
- 使用聚多巴胺 (PDA) 涂层和在聚烯 (PVP) 中单壁碳纳米管 (SWCNT) 的泥制造SPAN电极.
- 泥造工艺以实现高活性物质 (AM) 负载.
- 电化学表征包括循环测试和容量保留测量.
主要成果:
- 在初始循环中实现了18.40 mAh cm-2的高面积容量PDA@SPAN电极.
- 随着质量负载的增加,观察到可以忽略的容量减弱.
- 稳定的循环性能被证明,在80个循环后92.0%的容量保留,在高AM负载 (7.16 mg cm-2) 的160个循环后87.18%的容量保留.
结论:
- PDA涂层和SWCNT/PVP泥的协同组合有效地构建了电子导体网络,并使高AM比率成为可能.
- 在循环过程中,PDA和PVP之间的动态键增强了电极完整性.
- 开发的方法有助于为先进的LSB应用制备高性能,高负载的SPAN电极.
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