Improved energy storage density and efficiency of (1− x )Ba 0.85 Ca 0.15 Zr 0.1 Ti 0.9 O 3 - x BiMg 2/3 Nb 1/3 O 3 lead-free ceramics
Chemical Engineering Journal, ISSN: 1385-8947, Vol: 410, Page: 128341
2021
- 115Citations
- 16Captures
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Article Description
The improvement of energy density and efficiency is currently the main challenge in the application of lead-free dielectric energy-storage materials. Relaxor ferroelectric ceramics are the most commonly selected materials for pulsed power capacitors because of their inherent advantages, such as ultra-high power density, fast charging/discharging, and long lifetime. In this study, BiMg 2/3 Nb 1/3 O 3 (BMN) was doped to enhance energy density and efficiency in the (1− x )Ba 0.85 Ca 0.15 Zr 0.1 Ti 0.9 O 3 - x BiMg 2/3 Nb 1/3 O 3 systems based on the adjusted breakdown strength and polarization. As a result, a giant recoverable energy density of 3.81 J/cm 3 and a high energy efficiency of 90.5% were simultaneously achieved in the 0.925BCZT-0.075BMN ceramic, which the energy density is 26 times as large as that of BCZT ceramic. Excellent temperature (−25 to 100 °C) and frequency (1–100 Hz) stability of recoverable energy density and energy efficiency were confirmed with the fluctuations below 4.5%. Domain engineering on the nanoscale was designed in relaxor ferroelectrics, which effectively improved the energy storage performance. Our study provides a feasible guideline to develop lead-free ceramics for electrical energy storage applications.
Bibliographic Details
http://www.sciencedirect.com/science/article/pii/S1385894720344533; http://dx.doi.org/10.1016/j.cej.2020.128341; http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=85099379749&origin=inward; https://linkinghub.elsevier.com/retrieve/pii/S1385894720344533; https://dx.doi.org/10.1016/j.cej.2020.128341
Elsevier BV
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