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TiN Paper for Ultrafast-Charging Supercapacitors.
Bin Yao1, Mingyang Li1,2, Jing Zhang1
1Department of Chemistry and Biochemistry, University of California, Santa Cruz, Santa Cruz, CA, 95064, USA.
Nano-Micro Letters
|June 17, 2021
Summary
Researchers developed a porous titanium nitride (TiN) paper for ultrafast-charging energy storage devices. This novel material offers superior conductivity and stability compared to carbon-based alternatives, enabling rapid charging for electronics and electric vehicles.
Area of Science:
- Materials Science
- Electrochemistry
- Nanotechnology
Background:
- Ultrafast-charging energy storage is crucial for personal electronics and electric vehicles.
- Carbonaceous materials like graphene and carbon nanotubes are common but have conductivity limitations.
- Developing alternative electrode materials with higher conductivity is essential for improved performance.
Purpose of the Study:
- To fabricate and characterize a porous titanium nitride (TiN) paper as a novel electrode material for ultrafast-charging energy storage devices.
- To evaluate the electrochemical performance, including conductivity, ion diffusion, and electron transport, of the TiN paper.
- To assess the stability and scalability of TiN paper-based supercapacitors.
Main Methods:
- Fabrication of porous titanium nitride (TiN) paper using a filtration method.
- Measurement of electrical conductivity of the TiN paper.
- Electrochemical testing of TiN paper-based supercapacitors (SCs) including cyclic voltammetry and galvanostatic charge-discharge.
- Long-term cycling stability tests.
Main Results:
- The TiN paper exhibited excellent electrical conductivity (3.67 × 104 S m-1), surpassing most carbon electrodes.
- The unique porous structure facilitated efficient ion diffusion and electron transport for fast charging.
- TiN paper-based SCs demonstrated ultrahigh scan rate capability (100 V s-1) with a wide voltage window (1.5 V) and fast response time (4 ms).
- Remarkable cycling stability with zero capacitance loss after 200,000 cycles was achieved.
- The filtration method allowed for controlled fabrication, indicating scalability potential.
Conclusions:
- Porous titanium nitride (TiN) paper is a promising alternative electrode material for ultrafast-charging energy storage.
- The superior conductivity and unique nanostructure of TiN paper enable high performance and exceptional stability in supercapacitors.
- The scalable fabrication method suggests potential for practical applications in advanced energy storage systems.
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