About this Abstract |
| Meeting |
MS&T26: Materials Science & Technology
|
| Symposium
|
Energy Materials for Sustainable Development
|
| Presentation Title |
Enhanced Energy Storage and Fast Discharge Properties in Lead-Free Bismuth-Based Dielectric Ceramics |
| Author(s) |
Salman Ali Khan, Muhammad Shahid Khan, Khan Alam |
| On-Site Speaker (Planned) |
Salman Ali Khan |
| Abstract Scope |
High-temperature energy storage performance and ultra-fast discharge capability are essential for advanced pulsed power systems. In this study, BNT–BTNb–NT ceramics were developed to enhance energy-storage behavior. The optimized composition delivers a high energy density (Wᵣₑc ≈ 6.40 J·cm⁻³), high sensitivity factor (ξ = Wrec/Eb = 213 J/kV.m2), power density (PD ≈ 350.8 MW·cm⁻³), and ultra-fast discharge speed (t₀.₉ ≈ 43 ns). Moreover, Wᵣₑc and efficiency vary by only 3.2% and 4.9% across 1–100 Hz and by 2.1% and 5.8% over 25–160 °C, demonstrating excellent frequency and temperature-stable performance. Additionally, the optimum composition exhibits the widest temperature window of 438 °C from room-temperature to 460 °C for a temperature coefficient of capacitance ≤ ±15% and stable low dielectric loss (tan δ ≤ 0.05) up to 500 °C. These results highlight the BNT–BTNb–NT system as a promising candidate for high-temperature capacitors and pulsed power energy-storage applications. |