A self-regenerative heat pump based on a dual-functional relaxor ferroelectric polymer

• 成果类型: Article
• 署名作者: Wu, Hanxiang; Zhu, Yuan; Yan, Wenzhong; Zhang, Siyu; Budiman, William; Liu, Kede; Wu, Jianghan; Meng, Yuan; Zhao, Xun; Mehta, Ankur; Kaur, Sumanjeet; Pei, Qibing
• 署名单位: University of California System; University of California Los Angeles; University of California System; University of California Los Angeles; University of California System; University of California Los Angeles; University of California System; University of California Los Angeles; United States Department of Energy (DOE); Lawrence Berkeley National Laboratory
• 刊物名称: SCIENCE
• ISSN/ISSBN: 0036-10946
• DOI: 10.1126/science.adr2268
• 发表日期: 2024-11-01
• 页码: 546-551
• 关键词: giant temperature span; caloric materials; performance

摘要

Electrocaloric (EC) cooling presents a promising approach to efficient and compact solid-state heat pumps. However, reported EC coolers have complex architectures and limited cooling temperature lift. In this work, we introduce a self-regenerative heat pump (SRHP) using a cascade of EC polymer film stacks, which have electrostrictive actuations in response to an electric field that are directed to realize efficient heat transfer, eliminating the need for additional transportive or regenerative mechanisms. The SRHP demonstrates a cooling of 8.8 kelvin below ambient temperature in 30 seconds and delivers a maximum specific cooling power of 1.52 watts per gram. The temperature lift of the SRHP is 14.2 kelvin. These results underscore the potential of the compact solid-state cooling mechanism to address the increasing need for localized thermal management.