Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 13, Issue 1, Pages 1288-1300Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.0c21105
Keywords
WO3-x nanorods; self-assembly; DNA-like superstructures; mechanism; charge-discharge; asymmetric supercapacitor
Funding
- DST/INNO-INDIGO (DST/IMRCD/INNO-INDIGO/BIOCFD/2017(G))
- DST SERB [ECR/2015/000047]
- UGC New Delhi at the level of DSA-I under the Special Assistance Program (SAP) [540/14/DSA-I/2015/(SAP-I)]
- DST, New Delhi
- Goa University
Ask authors/readers for more resources
The study introduces a facile synthesis route for designing a DNA-like double helical WO3-x/C superstructure via self-assembly of carbon fiber-encapsulated WO3-x nanorods. The innovative design strategy shows excellent electrochemical performance and cycling stability.
Double helical DNA structure is one of the most beautiful and fascinating nanoarchitecture nature has produced. Mimicking nature's design by the tailored synthesis of semiconductor nanomaterials such as WO3 into a DNA-like double helical superstructure could impart special properties, such as enhanced stability, electrical conductivity, information storage, signal processing, and catalysis, owing to the synergistic interaction across helices. However, double helical WO3 synthesis is extremely challenging and has never been reported earlier. This investigation presents the first-ever report on a facile synthesis route for designing a DNA-like double helical WO3-x/C microfiber superstructure via self-assembly of in situ carbon fiber-encapsulated WO3-x nanorods. This innovative design strategy is completely template-free and does not require predesigned helical templates or hydro/solvothermal treatment. Detailed spectroscopic material characterization and electrochemical studies confirmed that the double helical structure with carbon fiber-WO3-x heterostructures enabled effective induction and distribution of oxygen vacancies along with W5+/W6+ redox surface states. Furthermore, faster electrode-electrolyte interfacial kinetics, improved electrical conductivity, and cycling stability has been observed in the carbon fiber-WO3-x heterostructures which resulted in a high area specific capacitance of 401 mF cm(-2) at 2 mA cm(-2) with excellent capacitance retention of >94% for more than 5000 cycles. Additionally, the carbon fiber-WO3-x heterostructures demonstrated promising performance when fabricated in a solid-state asymmetric supercapacitor device with the power density of 498 W kg(-1) at an energy density of 15.4 W h kg(-1). Therefore, the rare DNA-like double helical WO3-x/C superstructure synthesized in this study could open new doorways toward in situ, facile fabrication of double helical superstructures for energy and environmental applications.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available