DataVXAdvanced Functional MaterialsPaper
journal article·2025-10

Spontaneous‐Chessboard‐Ordered Structure of PbMg 0.5 W 0.5 O 3 Multilayer Capacitors Offers Giant Electrocaloric Enthalpy Change Below Room Temperature

Ruowei Yin, Dong Liu, Xiaowei Lv, Kailun Jiao, Yuxuan Hou, Junjie Li, Huajie Luo, Rongju Zhong, Xingyuan Qi, Chuanbao Liu, Yanjing Su, Lijie Qiao, Renchao Che, Lifeng Zhu, Turab Lookman, Yang Bai

Advanced Functional Materials· Volume 35· Issue 42
Publisher page
Source abstract

Abstract

Abstract For high‐efficiency and zero‐emission electrocaloric refrigeration, a continuing challenge is to achieve a large enthalpy change (Δ H ) below/near room temperature (RT) for commercial viability. To address this issue, antiferroelectric PbMg 0.5 W 0.5 O 3 multilayer ceramic capacitors (PMW MLCCs) are synthesized as a result of spontaneous‐chessboard‐ordered arrangement of heterovalent B‐site ions. PMW has a giant Δ H (3.92 J g −1 ) near RT (36 °C), and the stress‐engineered MLCCs further lower the Curie temperature to below RT (19 °C). The complete polarization under high electric fields enables a full release of the large Δ H and produces both a giant positive and negative electrocaloric effect, Δ T max+ = 7.17 K at 20 °C (@240 kV cm −1 ) and Δ T max‐ = −4.11 K at 10 °C (@180 kV cm −1 ). Moreover, the coefficient of performance (COP) is dramatically improved by an electric‐energy‐recovery circuit, and a colossal value of 350 is achieved in a prototypical cooler with 400 MLCCs. This outstanding refrigeration performance opens the door to PMW MLCCs for RT cooling applications with large market potential.
Source: crossref · Quality: baseline

Research context

Ceramics & glasses

OpenAlex topics: Ferroelectric and Piezoelectric Materials · Magnetic and transport properties of perovskites and related materials · Multiferroics and related materials

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Beijing Advanced Innovation Center for Materials Genome Engineering Institute for Advanced Materials and Technology University of Science and Technology Beijing Beijing 100083 China

School of Materials Science and Engineering University of Science and Technology Beijing Beijing 100083 China

Laboratory of Advanced Materials Shanghai Key Lab of Molecular Catalysis and Innovative Materials Academy for Engineering & Technology Fudan University Shanghai 200438 China

Sichuan Province Key Laboratory of Information Materials and Devices Application College of Optoelectronic Engineering Chengdu University of Information Technology Chengdu 610225 China

Zhejiang Laboratory Hangzhou 311100 China

AiMaterials Research LLC Santa Fe NM 87501 USA

Funding

National Natural Science Foundation of China · Higher Education Discipline Innovation Project

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