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High Energy Capacitors Based on All Metal‐Organic Frameworks Derivatives and Solar‐Charging Station Application
Author(s) -
Wei Xijun,
Hu Wanping,
Peng Huarong,
Xiong Yuli,
Xiao Peng,
Zhang Yunhuai,
Cao Guozhong
Publication year - 2019
Publication title -
small
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.785
H-Index - 236
eISSN - 1613-6829
pISSN - 1613-6810
DOI - 10.1002/smll.201902280
Subject(s) - capacitor , materials science , monocrystalline silicon , electrochemistry , electrochemical energy conversion , solar energy , non blocking i/o , photovoltaic system , optoelectronics , power density , nanotechnology , silicon , electrical engineering , voltage , power (physics) , electrode , chemistry , engineering , physics , organic chemistry , quantum mechanics , catalysis
High energy and efficient solar charging stations using electrochemical capacitors (ECs) are a promising portable power source for the future. In this work, two kinds of metal‐organic framework (MOF) derivatives, NiO/Co 3 O 4 microcubes and Fe 2 O 3 microleaves, are prepared via thermal treatment and assembled into electrochemical capacitors, which deliver a relatively high specific energy density of 46 Wh kg −1 at 690 W kg −1 . In addition, a solar‐charging power system consisting of the electrochemical capacitors and monocrystalline silicon plates is fabricated and a motor fan or 25 LEDs for 5 and 30 min, respectively, is powered. This work not only adds two novel materials to the growing categories of MOF‐derived advanced materials, but also successfully achieves an efficient solar‐ECs system for the first time based on all MOF derivatives, which has a certain reference for developing efficient solar‐charge systems.