Self‐Powered Piezo‐Supercapacitors Based on ZnO@Mo‐Fe‐MnO2 Nanoarrays
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Published:2023-12-10
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ISSN:2575-0356
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Container-title:ENERGY & ENVIRONMENTAL MATERIALS
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language:en
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Short-container-title:Energy & Environ Materials
Author:
Sun Luo1,
Ye Zhiguo1ORCID,
Peng Xinyuan1,
Zhuang Shaojie1,
Li Duosheng1,
Jin Zhong2ORCID
Affiliation:
1. School of Materials Science and Engineering Nanchang Hangkong University 696#, FengHeNan Road Nanchang 330063 China
2. State Key Laboratory of Coordination Chemistry, MOE Key Laboratory of Mesoscopic Chemistry, MOE Key Laboratory of High Performance Polymer Materials and Technology, Jiangsu Key Laboratory of Advanced Organic Materials, School of Chemistry and Chemical Engineering Nanjing University Nanjing 210023 China
Abstract
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). A self‐charging supercapacitor power cell device was assembled with the Mo‐ and Fe‐codoped MnO2 nanoarray electrode and poly(vinylidenefluoride‐co‐trifluoroethylene) (PVDF‐Trfe) piezoelectric film doped with BaTiO3 (BTO) and carbon nanotubes (CNTs) (denoted PVDF‐Trfe/CNTs/BTO). The self‐charging supercapacitor power cell 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 nanoarrays and the poly(vinylidenefluoride‐co‐trifluoroethylene) piezoelectric film doped with BaTiO3 and carbon nanotubes. More intriguingly, the device 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 nanoarrays in the self‐charging process of the self‐charging supercapacitor power cell device. This work provides novel directions and insights for the development of self‐charging supercapacitor power cells.
Funder
Fundamental Research Funds for the Central Universities
Innovative Research Group Project of the National Natural Science Foundation of China
Key Research and Development Program of Jiangxi Province
National Natural Science Foundation of China
Natural Science Foundation of Jiangxi Province
Subject
Energy (miscellaneous),Waste Management and Disposal,Environmental Science (miscellaneous),Water Science and Technology,General Materials Science,Renewable Energy, Sustainability and the Environment