向优越的电化学容量与等级纳米结构的多聚烯/MXene混合水凝修改的lignosulfonate
Zhenzhong Hou1, Qinghao Yang1, Hai Lu1
1College of Materials Science and Engineering, Xi'an University of Science and Technology, Xi'an 710054, China.
ACS omega
|July 21, 2025
概括
这项研究引入了用于先进超级电容器的硫酸盐修饰的聚烯/MXene混合液体. 这些材料可以防止MXene的降解,提高储能应用的性能和稳定性.
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:
- 碳化 (Ti3C2) MXene显示出超级电容器的巨大潜力,但受到重新堆积和氧化的影响.
- 开发稳定和高性能的MXene基材料对于实际的超级电容器应用至关重要.
研究的目的:
- 开发一种具有层次性多孔结构的新型硫酸盐 (LS) 修饰的多聚烯 (PPy) /MXene混合水凝.
- 为了提高基于MXene的超级电容器的电化学性能和稳定性.
主要方法:
- 为了创建混合水凝,采用了易于自组装的策略,涉及现场聚合.
- 聚烯纳米粒子和涂层被形成以防止MXene重新堆积和氧化.
- 纳入了lignosulfonate,以引入氧化还原活性子组并改善结构完整性.
主要成果:
- 混合水凝呈现出层次性的多孔结构,增强了离子扩散和电活性部位.
- 在0.2 A g-1.1下,获得了663.7 F g-1的显著特异电容.
- 超级电容器表现出高能量密度 (29.3 Wh kg-1 在 200 W kg-1 上) 和功率密度 (12.4 Wh kg-1 在 3200 W kg-1 上),具有出色的循环稳定性 (在 5000 个循环中保持 87.6%).
结论:
- 硫酸具有多功能作用,稳定结构,改善导电性,并有助于伪电容.
- 经LS修改的PPy/MXene混合水凝是先进超级电容器的高性能电极材料.
- 这项工作为克服MXene在储能设备中的局限性提供了一个可行的策略.
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