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石墨烯氧化物间接的PVDF纳米纤维作为自充电超级电容器的新型压缩分离器

Germein Magdy^1,2, Ishac Kandas^1,3, Safaa Elkhoby^1,4

¹Center of Smart Materials, Nanotechnology and Photonics (CSMNP), Smart CI Research Center, Alexandria University, Alexandria 21544, Egypt. aya.kadi@alexu.edu.eg.

|November 24, 2025

概括

这项研究引入了一种自充电超级电容器 (SCSC),该超级电容器使用了氧化石墨烯间接的PVDF纳米纤维膜. 这种创新的压电分离器收集机械能量来充电超级电容器,使其能够自动供电.

科学领域:

材料科学材料科学材料科学
储能储能储能储能储能储能
纳米技术纳米技术

背景情况:

超级电容器提供高功率密度,但需要外部充电.
压电材料将机械应力转化为电能.
开发自我充电的储能系统对于便携式电子设备至关重要.

研究的目的:

为自充超级电容器 (SCSCs) 开发高性能压电分离器.
为了研究石墨烯氧化物 (GO) 间接的PVDF纳米纤维膜 (GO/PVDF) 的制造和性能.
评估已制造的SCSC的能源采集和储存能力.

主要方法:

一个层层堆叠的GO/PVDF纳米纤维膜的制造.
膜形态,结构和压电特性 (β相含量,压电系数d33) 的表征.
组装和测试SCSC设备,包括电压生成,电容,能量密度和循环稳定性.

主要成果:

GO/PVDF膜表现出增强的β相含量 (66.2%) 和压电系数 (d33) 的52.30 ± 0.87 pC N-1.1.
压电纳米发电机 (PENG) 产生了高电压 (141.41 ± 2.37 V mm-1).
SCSC实现了面积电容1.85 mF cm-2,能量密度0.24 μWh cm-2和功率密度26 μW cm-2,在5000个周期内保持98%的电容.

结论:

接的PVDF纳米纤维膜有效地作为SCSC的压电分离器起作用.
该SCSC展示了高效的机械能量收集和自我充电能力,在4分钟内达到420mV.
这项研究通过整合压电和超级电容技术来推进自我充电的储能系统.

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