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Published on: September 19, 2020
Remarkable capacitive performance in novel tungsten bronze ceramics
Xinzhong Zhang1, Wenbo Ye, Xingying Bu
1Lab for Nanoelectronics and NanoDevices, Department of Electronics Science and Technology, Hangzhou Dianzi University, Hangzhou 310018, China. zhengpeng@hdu.edu.cn.
Novel lead-free tungsten bronze ceramics demonstrate exceptional energy storage density and efficiency. These materials offer fast discharge rates and high power density, indicating great potential for energy storage applications.
Area of Science:
- Materials Science
- Solid-State Chemistry
- Energy Storage
Background:
- Developing lead-free dielectric ceramics is crucial for sustainable energy storage solutions.
- Tungsten bronze structures offer promising avenues for high-performance dielectric materials.
Purpose of the Study:
- To design and investigate novel lead-free Sr1.75Ca0.25NaNb5O15 tungsten bronze ceramics.
- To evaluate their potential for advanced energy storage applications.
Main Methods:
- Synthesis of Sr1.75Ca0.25NaNb5O15 tungsten bronze ceramics.
- Characterization of structural and dielectric properties.
- Measurement of energy storage density, efficiency, and discharging performance.
Main Results:
- Achieved a remarkable energy storage density of ~3.23 J cm⁻³.
- Obtained a high energy storage efficiency of ~88.2% at 290 kV cm⁻¹.
- Demonstrated fast discharge rate (< 70 ns), high current density (1104 A cm⁻²), and power density (82.8 MW cm⁻³).
Conclusions:
- The novel lead-free tungsten bronze ceramic exhibits excellent capacitive performance.
- These findings highlight the significant potential of this material for next-generation energy storage devices.
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