Journal
JOURNAL OF POWER SOURCES
Volume 491, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.jpowsour.2021.229583
Keywords
Self-powered system; Integration; Flexible; Asymmetric supercapacitors; Microbial fuel cells
Funding
- Hainan Provincial Science and Technology Project [ZDYF2019160]
- Basic and Applied Basic Research Project of Guangdong Province [2019A1515110827]
- Science and Technology Planning Project of Guangzhou [201804010196]
- Education Commission of Guangdong Province [2019GKTSCX015]
- Advanced Functional Materials Scientific Research and Technical Service Team [X20190197]
- Natural Science Project of Guangdong Industry Polytechnic [KJ2020-006]
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An effective surface and structural modulation strategy involving native oxygen vacancies has been developed to enhance the performance of MnO2 nanorods in flexible asymmetric supercapacitors (ASCs) and microbial fuel cells (MFCs). The self-powered system, integrating flexible ASCs and MFCs, achieves chemical energy conversion and energy storage efficiently, demonstrating exceptional energy density and power density.
An effective surface and structural modulation strategy is developed to greatly boost the electron transfer rate, active sites as well as cycle stability of MnO2 nanorods by introducing native oxygen vacancies. Consequently, the as-prepared material exhibits exceptional performances as a dual function positive electrode for flexible asymmetric supercapacitors (ASCs) and microbial fuel cells (MFCs). Benefiting from its higher surface area, increased active sites and much better reaction kinetics, the maximum energy density of ASCs device reaches 56.04 Wh kg(-1), and the highest power density is 1639 mW m(-2) for the MFCs device. Most importantly, a self-powered system has been built by integrating the flexible ASCs and MFCs, which be able to achieve chemical energy conversion and energy storage.
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