Flexible Piezoelectric PMN鈥揚T Nanowire-Based Nanocomposite and Device

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• 作者：Shiyou Xu ; Yao-wen Yeh ; Gerald Poirier ; Michael C. McAlpine ; Richard A. Register ; Nan Yao
• 刊名：Nano Letters
• 出版年：2013
• 出版时间：June 12, 2013
• 年：2013
• 卷：13
• 期：6
• 页码：2393-2398
• 全文大小：350K
• 年卷期：v.13,no.6(June 12, 2013)
• ISSN：1530-6992

文摘

Piezoelectric nanocomposites represent a unique class of materials that synergize the advantageous features of polymers and piezoelectric nanostructures and have attracted extensive attention for the applications of energy harvesting and self-powered sensing recently. Currently, most of the piezoelectric nanocomposites were synthesized using piezoelectric nanostructures with relatively low piezoelectric constants, resulting in lower output currents and lower output voltages. Here, we report a synthesis of piezoelectric (1 鈥?x)Pb(Mg_1/3Nb_2/3)O₃鈥?i>xPbTiO₃ (PMN鈥揚T) nanowire-based nanocomposite with significantly improved performances for energy harvesting and self-powered sensing. With the high piezoelectric constant (d₃₃) and the unique hierarchical structure of the PMN鈥揚T nanowires, the PMN鈥揚T nanowire-based nanocomposite demonstrated an output voltage up to 7.8 V and an output current up to 2.29 渭A (current density of 4.58 渭A/cm²); this output voltage is more than double that of other reported piezoelectric nanocomposites, and the output current is at least 6 times greater. The PMN鈥揚T nanowire-based nanocomposite also showed a linear relationship of output voltage versus strain with a high sensitivity. The enhanced performance and the flexibility of the PMN鈥揚T nanowire-based nanocomposite make it a promising building block for energy harvesting and self-powered sensing applications.

Keywords:

PMN鈭扨T nanowires; piezoelectric nanocomposite; energy harvesting; nanogerators; self-powered sensors