Giant Capacitive Energy Storage in High‐Entropy Lead‐Free Ceramics with Temperature Self‐Check

Advanced Materials, Journal Year: 2024, Volume and Issue: unknown

Published: Sept. 19, 2024

Abstract Considering the large demand for electricity in era of artificial intelligence and big data, there is an urgent need to explore novel energy storage media with higher density intelligent temperature self‐check functions. High‐entropy (HE) ceramic capacitors are great significance because their excellent efficiency high power ( P D ). However, contradiction between configurational entropy polarization traditional HE systems greatly restrains increase density. Herein, effectively solved by regulating octahedral tilt cationic displacement ABO 3 ‐type perovskite ceramics, i.e., (1‐ x )[0.6(Bi 0.47 Na Yb 0.03 Tm 0.01 )TiO ‐0.4(Ba 0.5 Sr ]‐ Sr(Zr Hf )O (BNYTT‐BST‐ SZH). Combining tape‐casting process cold isostatic pressing, optimal BNYTT‐BST‐0.06SZH displays a recoverable (10.46 J cm −3 ) at 685 kV −1 (332.88 MW More importantly, due Tm/Yb codoping, abnormal fluorescent negative thermal expansion real‐time sensing developed, thus application fault detection warning high‐voltage transmission line conceptualized. This study provides effective strategy enhancing energy‐storing ceramics offers promising material overcoming problems insufficient capacitor runaway terminal communication.

Language: Английский

---

Polar Vortices in Relaxor Ferroelectric Ceramics for High-Efficiency Capacitive Energy Storage

ACS Nano, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 3, 2025

Polar vortices are predominantly observed within the confined ferroelectric films and ferroelectric/paraelectric superlattices. This raises intriguing question of whether polar can form relaxor ceramics subsequently contribute to their energy storage performances. Here, we incorporate 10 mol % CaSnO

Language: Английский

---

Superior Electrostatic Storage Energy Under Moderate Electric Field of Superparaelectrics with Highly Polarizable Clusters

Advanced Functional Materials, Journal Year: 2025, Volume and Issue: unknown

Published: March 16, 2025

Abstract Despite the widespread research of relaxor ferroelectrics in pulsed power capacitors, achieving both high recoverable energy density ( W rec ) and efficiency η under moderate electric field range is still challenged because domain miniaturization required to enhance generally leads delayed polarization saturation reduced spontaneous polarization. Here, highly polarizable clusters superparaelectrics with locally coexisted multiphase are demonstrated by introducing Bi 0.5 Li ZrO 3 into BaTiO matrix. The synergistic introduction additional A‐site contribution, domains polar clusters, local coexistence enable maximal P max at extremely low hysteresis. As a result, combined effects heterogeneous cations driven ferroelectricity, valence state difference, A‐ B‐sites ionic radius difference lead giant ≈9.11 J cm −3 ≈95.3% concurrently 47 kV mm −1 . This work demonstrates that modulating characteristic ferroelectric ceramics can achieve superior energy‐storage performances.

Language: Английский

---

Lead-free BaTiO3-based composite ceramics with ultra-high energy storage performance via synergistic modulation of polarization and breakdown strength

Journal of Power Sources, Journal Year: 2025, Volume and Issue: 632, P. 236399 - 236399

Published: Feb. 2, 2025

Language: Английский

---

Ultrahigh Energy Storage in Relaxor Ferroelectric Ceramics with Core–Shell Grains

Advanced Functional Materials, Journal Year: 2025, Volume and Issue: unknown

Published: March 30, 2025

Abstract The achievement of record‐high energy storage performance in relaxor‐ferroelectric bulk ceramics represents a major advancement the field dielectric capacitors. Nonetheless, trade‐off between breakdown strength and polarization has typically limited optimization overall performance. Here, guided by rational composition design, K 0.5 Na NbO 3 ‐based are fabricated with grain core–shell structures polymorphic nanodomains, leading to synergistic enhancement polarization. This results an unprecedented recoverable density ≈20.4 J·cm −3 efficiency ≈90% at electric ≈1020 kV·cm −1 . Additionally, exhibits excellent charge–discharge performance, including high discharge ≈6.0 ultrashort time ≈42 ns 500 , along superior reliability stability. These advancements expected provide valuable insights for exploration utilization advanced materials.

Language: Английский

---

Enhanced energy storage performance of BiFeO3-BaTiO3 based ceramics under moderate electric fields via multiple synergistic design

Chemical Engineering Journal, Journal Year: 2025, Volume and Issue: unknown, P. 162494 - 162494

Published: April 1, 2025

Language: Английский

---

Exceptional capacitive energy storage in CaTiO3-based ceramics featuring laminate nanodomains

Chemical Engineering Journal, Journal Year: 2025, Volume and Issue: unknown, P. 162477 - 162477

Published: April 1, 2025

Language: Английский

---

Engineering nanocluster and pyrochlore phase in BiFeO3-based ceramics for electrostatic energy storage

Composites Part B Engineering, Journal Year: 2024, Volume and Issue: 287, P. 111829 - 111829

Published: Sept. 8, 2024

Language: Английский

---

Remarkable energy storage performance of BiFeO3-based high-entropy lead-free ceramics and multilayers

Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: unknown, P. 156112 - 156112

Published: Sept. 1, 2024

Language: Английский

---

Energy storage properties in multiple ions co-doped Bi0.5Na0.5TiO3-SrTiO3 based ferroelectric ceramics via heterogeneous strategy coordination

Ceramics International, Journal Year: 2025, Volume and Issue: unknown

Published: April 1, 2025

Language: Английский

---