具有核心外结构的高性能VO2/CNT@PANI使可打印的平面内对称超级电容器成为可能
Cheng Chen1, Shiwen Wei2, Qiang Zhang2
1Electronic Information School, Wuhan University, Wuhan 480032, China.
Journal of colloid and interface science
|March 8, 2024
概括
灵活的超级电容器使用涂有聚氨酸 (PANI) 和碳纳米管 (CNT) 的二氧化 (VO2) 纳米棒,为电子产品提供了改进的能量存储. 这种VO2/CNT@PANI复合材料表现出高容量和长周期寿命,有效地为设备供电.
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:
- 灵活的超级电容器对于便携式电子设备至关重要.
- 二氧化瓦纳 (VO2) 具有很高的理论电容,但其循环寿命较差,能量密度较低.
- 开发先进的电极材料对于高性能储能是必不可少的.
研究的目的:
- 为了提高二氧化瓦纳 (VO2) 的电化学性能,用于柔性超级电容器.
- 为了解决基于VO2的伪电容器的循环寿命和能量密度的限制.
- 为灵活的超级电容器设备开发可扩展的制造方法.
主要方法:
- 通过溶热方法合成与碳纳米管 (CNT) 集成的VO2纳米棒.
- 一个聚氨 (PANI) 在VO2/CNT纳米结构上的现场聚合.
- 印VO2/CNT@PANI油墨以制造内平面对称超级电容器设备.
主要成果:
- 这种VO2/CNT@PANI复合材料在0.5A/g下达到354.2F/g的特定电容,在5000个周期内保持了88.2%的电容.
- 对称超级电容器装置的面积能量密度为99.57μWh/cm2在387.5μW/cm2时.
- 该设备在长时间使用后保持了大约87.6%的初始电容,并为便携式游戏机供电.
结论:
- VO2,CNT和PANI的协同作用组合显著提高了超级电容器的性能.
- 开发的印技术使得高性能,灵活的超级电容器的制造成为可能.
- 这项工作提出了一个可行的策略,用于为可穿戴电子产品创建先进的储能解决方案.
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