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Self-Powered Piezo-Supercapacitors Based on ZnO@Mo-Fe-MnO2 Nanoarrays
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  • Luo Sun,
  • Zhiguo Ye,
  • Xinyuan Peng,
  • Shaojie Zhuang,
  • Duosheng Li,
  • Zhong Jin
Luo Sun
Nanchang Hangkong University
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Zhiguo Ye
Nanchang Hangkong University

Corresponding Author:[email protected]

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Xinyuan Peng
Nanchang Hangkong University
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Shaojie Zhuang
Nanchang Hangkong University
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Duosheng Li
Nanchang Hangkong University
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Zhong Jin
Nanjing University
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The development of self-charging supercapacitor power cells (SCSPCs) has profound implications for smart electronic devices used in different fields. Here, we epitaxially electrodeposited Mo- and Fe-codoped MnO2 films on piezoelectric ZnO nanoarrays (NAs) grown on the flexible carbon cloth (denoted ZnO@Mo-Fe-MnO2 NAs). An SCSPC device was assembled with the ZnO@Mo-Fe-MnO2 NA electrode and poly(vinylidenefluoride-co-trifluoroethylene) (PVDF-Trfe) piezoelectric film doped with BaTiO3 (BTO) and carbon nanotubes (CNTs) (denoted PVDF-Trfe/CNTs/BTO). The SCSPC device exhibited an energy density of 30 μWh cm-2 with a high-power density of 40 mW cm-2, and delivered an excellent self-charging performance of 363 mV (10 N) driven by both the piezoelectric ZnO NAs and the PVDF-Trfe/CNTs/BTO films. More intriguingly, the device also could also be self-charged by 184 mV due to residual stress alone, and showed excellent energy conversion efficiency and low self-discharge rate. This work illustrates for the first time the self-charging mechanism involving electrolyte ion migration driven by both electrodes and films. A comprehensive analysis strongly confirmed the important contribution of the piezoelectric ZnO NAs in the self-charging process of the SCSPC device. This work provides novel directions and insights for the development of SCSPCs.
04 Aug 2023Submitted to Energy & Environmental Materials
07 Aug 2023Submission Checks Completed
07 Aug 2023Assigned to Editor
08 Aug 2023Review(s) Completed, Editorial Evaluation Pending
14 Aug 2023Reviewer(s) Assigned
02 Sep 2023Editorial Decision: Revise Minor
14 Sep 20231st Revision Received
15 Sep 2023Submission Checks Completed
15 Sep 2023Assigned to Editor
15 Sep 2023Review(s) Completed, Editorial Evaluation Pending
22 Sep 2023Reviewer(s) Assigned
02 Oct 2023Editorial Decision: Accept