提升具有多壁碳纳米管的反氧活性聚胺多孔有机聚合物,朝着伪容量储能方向发展
Tian Zhou1, Yu Yuan1, Luyi Xiao1
1School of Environmental and Chemical Engineering, Shanghai University, 99 Shangda Road, Shanghai 200444, China.
Nanomaterials (Basel, Switzerland)
|September 13, 2024
概括
这项研究通过将多孔有机聚合物 (POP) 与碳纳米管相结合,开发了一种用于超级电容的新复合材料. 这提高了储能性能和稳定性,为先进的能源设备铺平了道路.
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
- 纳米技术 纳米技术
背景情况:
- 氧化还原活性多孔有机聚合物 (POPs) 对超级电容器有希望,但受到低导电性和聚合的影响.
- 这限制了它们的氧化还原活性位点的有效使用,阻碍了超级电容器的性能.
研究的目的:
- 合成聚胺POPs (PMTA) 和多壁碳纳米管 (MWCNTs) 的复合物.
- 为了提高POPs的电导率和氧化还原现场利用,用于增强的超级电容器应用.
主要方法:
- 在MWCNT上的PMTA POPs在现场合成,使用四米诺金 (TABQ) 和1,4,5,8-纳弗他林四碳酸二化物 (PMDA) 单体.
- 由π-π堆叠相互作用驱动的PMTA/MWCNT复合物的形成.
- 电化学表征包括循环电压测量 (CV) 和现场里埃变换红外 (FT-IR) 光谱学.
主要成果:
- 与原始的PMTA POPs (5.7 F g-1) 相比,PMTA/MWCNT复合物表现出显著增强的电容 (375.2 F g-1在1 A g-1上).
- 复合材料表现出极好的循环稳定性 (89.7%,在8000个循环后在5Ag-1下保持89.7%).
- 使用PMTA/MWCNT的不对称超级电容器 (ASC) 实现了高能量密度 (15.4Wh kg-1),并改善了电容保持率 (10,000个循环后125%).
结论:
- MWCNTs有效地解决PMTA POPs的导电性和堆叠问题,激活它们的氧化还原组.
- 由于其优越的电化学性能和稳定性,PMTA/MWCNT复合材料显示出实际超级电容应用的巨大潜力.
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