Details

Autor(en) / Beteiligte

• Zhang, Min
• Lan, Shun
• Yang, Bing B
• Pan, Hao
• Liu, Yi Q
• Zhang, Qing H
• Qi, Jun L
• Chen, Di
• Su, Hang
• Yi, Di
• Yang, Yue Y
• Wei, Rui
• Cai, Hong D
• Han, Hao J
• Gu, Lin
• Nan, Ce-Wen
• Lin, Yuan-Hua

Titel

Ultrahigh energy storage in high-entropy ceramic capacitors with polymorphic relaxor phase

Ist Teil von

• Science (American Association for the Advancement of Science), 2024-04, Vol.384 (6692), p.185-189

Ort / Verlag

United States: The American Association for the Advancement of Science

Erscheinungsjahr

2024

Link zum Volltext

Quelle

Science Online_科学在线

Beschreibungen/Notizen

• Ultrahigh-power-density multilayer ceramic capacitors (MLCCs) are critical components in electrical and electronic systems. However, the realization of a high energy density combined with a high efficiency is a major challenge for practical applications. We propose a high-entropy design in barium titanate (BaTiO )-based lead-free MLCCs with polymorphic relaxor phase. This strategy effectively minimizes hysteresis loss by lowering the domain-switching barriers and enhances the breakdown strength by the high atomic disorder with lattice distortion and grain refining. Benefiting from the synergistic effects, we achieved a high energy density of 20.8 joules per cubic centimeter with an ultrahigh efficiency of 97.5% in the MLCCs. This approach should be universally applicable to designing high-performance dielectrics for energy storage and other related functionalities.