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High‐Performance Piezoelectric Nanogenerators with Imprinted P(VDF‐TrFE)/BaTiO3 Nanocomposite Micropillars for Self‐Powered Flexible Sensors
Small ( IF 13.0 ) Pub Date : 2017-04-28 , DOI: 10.1002/smll.201604245
Xiaoliang Chen 1 , Xiangming Li 1 , Jinyou Shao 1 , Ningli An 2 , Hongmiao Tian 1 , Chao Wang 1 , Tianyi Han 1 , Li Wang 1 , Bingheng Lu 1
Affiliation  

Piezoelectric nanogenerators with large output, high sensitivity, and good flexibility have attracted extensive interest in wearable electronics and personal healthcare. In this paper, the authors propose a high‐performance flexible piezoelectric nanogenerator based on piezoelectrically enhanced nanocomposite micropillar array of polyvinylidene fluoride‐trifluoroethylene (P(VDF‐TrFE))/barium titanate (BaTiO3) for energy harvesting and highly sensitive self‐powered sensing. By a reliable and scalable nanoimprinting process, the piezoelectrically enhanced vertically aligned P(VDF‐TrFE)/BaTiO3 nanocomposite micropillar arrays are fabricated. The piezoelectric device exhibits enhanced voltage of 13.2 V and a current density of 0.33 µA cm−2, which an enhancement by a factor of 7.3 relatives to the pristine P(VDF‐TrFE) bulk film. The mechanisms of high performance are mainly attributed to the enhanced piezoelectricity of the P(VDF‐TrFE)/BaTiO3 nanocomposite materials and the improved mechanical flexibility of the micropillar array. Under mechanical impact, stable electricity is stably generated from the nanogenerator and used to drive various electronic devices to work continuously, implying its significance in the field of consumer electronic devices. Furthermore, it can be applied as self‐powered flexible sensor work in a noncontact mode for detecting air pressure and wearable sensors for detecting some human vital signs including different modes of breath and heartbeat pulse, which shows its potential applications in flexible electronics and medical sciences.

中文翻译:

高性能压电纳米发生器,带有压印的P(VDF-TrFE)/ BaTiO3纳米复合材料微柱,用于自供电柔性传感器

具有大输出,高灵敏度和良好柔韧性的压电纳米发电机在可穿戴电子产品和个人医疗保健中引起了广泛的关注。在本文中,作者提出了一种高性能的柔性压电纳米发电机,该压电纳米发电机基于聚偏二氟乙烯-三氟乙烯(P(VDF-TrFE))/钛酸钡(BaTiO 3)的压电增强纳米复合微柱阵列,用于能量收集和高度灵敏的自供电感应。通过可靠且可扩展的纳米压印工艺,制造了压电增强的垂直排列的P(VDF-TrFE)/ BaTiO 3纳米复合微柱阵列。压电器件显示出13.2 V的增强电压和0.33 µA cm -2的电流密度,相对于原始P(VDF-TrFE)块状薄膜,其相对强度提高了7.3倍。高性能的机理主要归因于P(VDF-TrFE)/ BaTiO 3的增强压电性纳米复合材料和微柱阵列的改进的机械柔韧性。在机械冲击下,纳米发电机稳定地产生稳定的电能,并用于驱动各种电子设备连续工作,这暗示了其在消费电子设备领域的重要性。此外,它还可以用作非接触式自供电柔性传感器工作,用于检测气压,以及可穿戴式传感器,用于检测某些人类生命体征,包括呼吸和心跳脉搏的不同模式,这表明其在柔性电子学和医学领域的潜在应用。
更新日期:2017-04-28
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