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Salinity‐Difference‐Driven Power Generation by a Hybrid Capacitive Approach
Author(s) -
Zhan Fei,
Wang Gang,
Wu Tingting,
Dong Qiang,
Meng Yulan,
Wang Jianren,
Qiu Jieshan
Publication year - 2018
Publication title -
energy technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.91
H-Index - 44
eISSN - 2194-4296
pISSN - 2194-4288
DOI - 10.1002/ente.201700436
Subject(s) - salinity , electrode , extraction (chemistry) , capacitor , voltage , carbon fibers , battery (electricity) , materials science , potential difference , capacitive sensing , osmotic power , power (physics) , chemical engineering , environmental science , chemistry , electrical engineering , membrane , composite material , chromatography , thermodynamics , geology , physics , oceanography , engineering , composite number , biochemistry , reverse osmosis , forward osmosis
The extraction of salinity gradient energy remains a challenging task. In this paper, we propose a new method for the extraction of salinity gradient energy by using a hybrid capacitor, which consists of a battery electrode and a porous carbon electrode. The potentials of the Na 4 Mn 9 O 18 (NMO) and activated carbon (AC) electrodes show opposite dependencies on salt concentration, so that as fresh water and salt water flow alternately through the hybrid capacitor, the voltage difference between the electrodes can be increased by 110 mV. Our results demonstrate the viability of this new method to harvest salinity gradient energy without using membranes or precious metals.