在不同的pH条件下使用WSe2@石墨薄膜电极对灵活对称超级电容器进行电化学分析
Akshay Tomar1, Nitesh Choudhary1, Radhika Jain1
1Thin Film Lab, Institute Instrumentation Centre, Indian Institute of Technology Roorkee, Roorkee-247667, India. ramesh.chandra@ic.iitr.ac.in.
Nanoscale
|June 24, 2025
概括
电解质pH显著影响灵活超级电容器的性能. 酸性电解质增强WSe2@石墨设备,实现高容量和能量密度,稳定性好.
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:
- 灵活的对称超级电容器 (SS) 对于便携式电子设备至关重要.
- 调节电极材料和电解质是优化性能的关键.
- 需要了解电解质对WSe2@石墨复合材料的影响.
研究的目的:
- 调查电解质pH对WSe2@石墨柔性SS的影响.
- 评估超级电容器在酸性,基本性和中性电解质中的性能.
- 确定增强能源存储的最佳条件.
主要方法:
- WSe2@石墨复合电极的制造.
- 使用XRD,FE-SEM,XPS,AFM和EDX进行表征.
- 在H2SO4,NaOH和Na2SO4电解质中通过CV,GCD和EIS进行电化学测试.
主要成果:
- 在所有pH水平上,SS装置显示了一个稳定的2V电位窗口.
- 酸性H2SO4电解质产生了最高的面积电容 (123.73 mF cm-2) 和能量密度 (68.73 μWh cm-2).
- 该设备在5000次GCD循环后保持了78.69%的电容,表明了良好的稳定性.
结论:
- 电解质pH值是超级电容器性能的一个关键因素.
- 酸性电解质是WSe2@石墨基柔性SS.的最佳选择.
- 战略性电解质选择可以导致高性能能量存储设备.
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