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An Auto‐Switchable Dual‐Mode Seawater Energy Extraction System Enabled by Metal–Organic Frameworks
Author(s) -
Zhang Wei,
Chen Wenqian,
Zhao Xiaoli,
Dang Qi,
Li Yucen,
Shen Tianyu,
Wu Fengchang,
Tang Liang,
Jiang Hu,
Hu Ming
Publication year - 2019
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.201901759
Subject(s) - seawater , underwater , power density , extraction (chemistry) , energy density , environmental science , power (physics) , energy (signal processing) , materials science , chemistry , engineering physics , physics , geology , oceanography , organic chemistry , quantum mechanics
Abstract Harvesting energy directly in oceans by electrochemical devices is essential for driving underwater appliances such as underwater vehicles or detectors. Owing to the extreme undersea environment, it is important but difficult to use the devices with both a high energy density and power density simultaneously. Inspired by marine organisms that have switchable energy extraction modes (aerobic respiration for long‐term living or anaerobic respiration to provide instantaneously high output power for fast movement), an auto‐switchable dual‐mode seawater energy extraction system is presented to provide high energy density and power density both by initiatively choosing different solutes in seawater as electron acceptors. With assistance from metal–organic frameworks, this device had a theoretical energy density of 3960 Wh kg −1 , and a high practical power density of 100±4 mW cm −2 with exceptional stability and low cost, making practical applications in seawater to be possible.