Polypyrrole‐boosted photothermal energy storage in MOF‐based phase change materials

Author:

Liu Panpan12,Huang Mengke3,Chen Xiao1ORCID,Gao Yan3,Li Yang12,Dong Cheng4,Wang Ge3

Affiliation:

1. Institute of Advanced Materials Beijing Normal University Beijing China

2. College of Nuclear Science and Technology Beijing Normal University Beijing China

3. Beijing Advanced Innovation Center for Materials Genome Engineering, Beijing Key Laboratory of Function Materials for Molecule & Structure Construction, School of Materials Science and Engineering University of Science and Technology Beijing Beijing China

4. School of Materials Science and Engineering Shandong University of Technology Zibo China

Abstract

AbstractInfiltrating phase change materials (PCMs) into nanoporous metal–organic frameworks (MOFs) is accepted as a cutting‐edge thermal energy storage concept. However, weak photon capture capability of pristine MOF‐based composite PCMs is a stumbling block in solar energy utilization. Towards this goal, we prepared advanced high‐performance pristine MOF‐based photothermal composite PCMs by simultaneously integrating photon absorber guest (polypyrrole [PPy]) and thermal storage guest (1‐octadecanol [ODA]) into an MOF host (Cr‐MIL‐101‐NH2). The coated PPy layer on the surface of ODA@MOF not only serves as a photon harvester, but also serves as a phonon enhancer. Resultantly, ODA@MOF/PPy composite PCMs exhibit intense and broadband light absorption characteristic in the ultraviolet–visible–near‐infrared region, and higher heat transfer ability than ODA@MOF. Importantly, the photothermal conversion and storage efficiency of ODA@MOF/PPy‐6% is up to 88.3%. Additionally, our developed MOF‐based photothermal composite PCMs also exhibit long‐standing antileakage stability, energy storage stability, and photothermal conversion stability. The proposed coating strategy and in‐depth understanding mechanism are expected to facilitate the development of high‐efficiency MOF‐based photothermal composite PCMs in solar energy utilization.

Funder

National Natural Science Foundation of China

Publisher

Wiley

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