高能量密度对称超级电容器将氧化还原活性凝聚合物电解质与N-化碳合起来
Undavalli Venkata Gopi1, Akash Sai S M1, Kumar Sai Smaran1
1Department of Chemistry, Sri Sathya Sai Institute of Higher Learning (Deemed to be University), Prasanthi Nilayam Campus,, Prasanthi Nilayam, Andhra pradesh, 515134, INDIA.
Nanotechnology
|June 23, 2025
概括
这项研究通过将自补充活性炭 (NDAC) 与偏二胺 (PPD) 氧化还原添加剂和PVA-KOH凝电解质相结合,提高了超级电容器的性能. 这种协同作用显著提高了高性能储能能的特定电容和能量密度.
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:
- 电气双层电容器 (EDLC) 的性能可以通过结合氧化还原活性物种来提高.
- 来自豆粉的自补充活性炭 (NDAC) 为EDLC电极提供了合适的石墨化碳框架.
- 整合氧化还原添加剂与电极和电解质是增强电容性质的关键策略.
研究的目的:
- 提高EDLCs的特定电容和整体性能.
- 研究作为氧化还原添加剂和聚 (乙烯基酒精) 和氧化 (PVA-KOH) 凝聚合物电解质与NDAC.PPD的协同效应.
- 确定PPD的最佳度,以最大限度地提高超级电容器的性能.
主要方法:
- 使用自补充活性炭 (NDAC) 制造电极.
- 用NDAC电极集成可二胺 (PPD) 作为氧化还原添加剂.
- 使用聚 (乙烯基醇) 和氧化 (PVA-KOH) 开发凝聚合物电解质.
- 使用三电极和两电极对称超级电容器 (SSC) 组件进行电化学表征.
- 性能分析包括特定电容,电容保留,库伦比效率,能量密度和功率密度.
主要成果:
- 在3个电极设置中,用25mM的PPD实现了1Ag-1的6倍增长到835Fg-1的特定电容.
- 恩的解卷分析表明存在主导的扩散性电荷储存机制 (75.8%),证实了氧化还原贡献.
- 在两电极SSC中,混合凝电解质在1Ag-1下产生179.94Fg-1,在40Ag-1.1下进行10,000个循环后保持77.5%.
- 10毫克的最佳PPD度产生了35.99Wh kg-1的能量密度,功率密度为900W kg-1.1.
- 卓越的稳定性,低泄漏电流和最小的自放电通过电压保持和自放电研究得到证实.
结论:
- 混合PPD凝聚合物电解质和NDAC电极的组合代表了开发高性能超级电容器的有效策略.
- 该研究强调了电容性能的显著提升,原因是氧化还原添加剂和电极材料之间的协同相互作用.
- 开发的超级电容系统展示了对需要高能量和功率密度的实际储能应用的有希望的潜力.
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