High quality Mn-doped (Na,K)NbO3 nanofibers for flexible piezoelectric nanogenerators

Han Byul Kang; Jiyoung Chang; Kisik Koh; Liwei Lin; Yong Soo Cho

doi:10.1021/am502234q

High quality Mn-doped (Na,K)NbO₃ nanofibers for flexible piezoelectric nanogenerators

Han Byul Kang, Jiyoung Chang, Kisik Koh, Liwei Lin, Yong Soo Cho

Department of Materials Science and Engineering

Research output: Contribution to journal › Article › peer-review

133 Citations (Scopus)

Abstract

Enhanced piezoelectric and energy-harvesting characteristics of Mn-doped (Na_0.5K_0.5)NbO₃ (NKN) nanofibers have been investigated with actual fabrication of potential flexible nanogenerators. The electrospinning process of nanofibers has been initially optimized with the proper level of chelating agent and annealing temperature. High quality nanofibers are successfully obtained only by means of a certain level of doped-Mn, which incorporates into the NKN perovskite structure and facilitates significant grain growth. A single-particle-stacked structure along the direction of fiber length becomes more evident with increasing Mn content. An XPS analysis confirms that Mn exists in multivalent states of Mn ²⁺/Mn³⁺. The effective piezoelectric coefficient of the nanofibers is found to be enhanced by 5 times with Mn-doping up to 3 mol % as characterized by piezoelectric force microscopy. The resultant flexible nanogenerators on PES films have exhibited ∼0.3 V output voltage and ∼50 nA output current under a bending strain.

Original language	English
Pages (from-to)	10576-10582
Number of pages	7
Journal	ACS Applied Materials and Interfaces
Volume	6
Issue number	13
DOIs	https://doi.org/10.1021/am502234q
Publication status	Published - 2014 Jul 9

All Science Journal Classification (ASJC) codes

Materials Science(all)

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10.1021/am502234q

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title = "High quality Mn-doped (Na,K)NbO3 nanofibers for flexible piezoelectric nanogenerators",

abstract = "Enhanced piezoelectric and energy-harvesting characteristics of Mn-doped (Na0.5K0.5)NbO3 (NKN) nanofibers have been investigated with actual fabrication of potential flexible nanogenerators. The electrospinning process of nanofibers has been initially optimized with the proper level of chelating agent and annealing temperature. High quality nanofibers are successfully obtained only by means of a certain level of doped-Mn, which incorporates into the NKN perovskite structure and facilitates significant grain growth. A single-particle-stacked structure along the direction of fiber length becomes more evident with increasing Mn content. An XPS analysis confirms that Mn exists in multivalent states of Mn 2+/Mn3+. The effective piezoelectric coefficient of the nanofibers is found to be enhanced by 5 times with Mn-doping up to 3 mol % as characterized by piezoelectric force microscopy. The resultant flexible nanogenerators on PES films have exhibited ∼0.3 V output voltage and ∼50 nA output current under a bending strain.",

author = "Kang, {Han Byul} and Jiyoung Chang and Kisik Koh and Liwei Lin and Cho, {Yong Soo}",

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T1 - High quality Mn-doped (Na,K)NbO3 nanofibers for flexible piezoelectric nanogenerators

AU - Kang, Han Byul

AU - Chang, Jiyoung

AU - Koh, Kisik

AU - Lin, Liwei

AU - Cho, Yong Soo

PY - 2014/7/9

Y1 - 2014/7/9

N2 - Enhanced piezoelectric and energy-harvesting characteristics of Mn-doped (Na0.5K0.5)NbO3 (NKN) nanofibers have been investigated with actual fabrication of potential flexible nanogenerators. The electrospinning process of nanofibers has been initially optimized with the proper level of chelating agent and annealing temperature. High quality nanofibers are successfully obtained only by means of a certain level of doped-Mn, which incorporates into the NKN perovskite structure and facilitates significant grain growth. A single-particle-stacked structure along the direction of fiber length becomes more evident with increasing Mn content. An XPS analysis confirms that Mn exists in multivalent states of Mn 2+/Mn3+. The effective piezoelectric coefficient of the nanofibers is found to be enhanced by 5 times with Mn-doping up to 3 mol % as characterized by piezoelectric force microscopy. The resultant flexible nanogenerators on PES films have exhibited ∼0.3 V output voltage and ∼50 nA output current under a bending strain.

AB - Enhanced piezoelectric and energy-harvesting characteristics of Mn-doped (Na0.5K0.5)NbO3 (NKN) nanofibers have been investigated with actual fabrication of potential flexible nanogenerators. The electrospinning process of nanofibers has been initially optimized with the proper level of chelating agent and annealing temperature. High quality nanofibers are successfully obtained only by means of a certain level of doped-Mn, which incorporates into the NKN perovskite structure and facilitates significant grain growth. A single-particle-stacked structure along the direction of fiber length becomes more evident with increasing Mn content. An XPS analysis confirms that Mn exists in multivalent states of Mn 2+/Mn3+. The effective piezoelectric coefficient of the nanofibers is found to be enhanced by 5 times with Mn-doping up to 3 mol % as characterized by piezoelectric force microscopy. The resultant flexible nanogenerators on PES films have exhibited ∼0.3 V output voltage and ∼50 nA output current under a bending strain.

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High quality Mn-doped (Na,K)NbO₃ nanofibers for flexible piezoelectric nanogenerators

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