authors |
Navalpotro, P; Trujillo, C; Montes, I; Neves, CMSS; Palma, J; Freire, MG; Coutinho, JAP; Marcilla, R |
nationality |
International |
journal |
ENERGY STORAGE MATERIALS |
author keywords |
Membrane-free batteries; Membrane-less batteries; Aqueous biphasic systems; Aqueous redox flow batteries; Organic redox flow batteries; Self-discharge process |
keywords |
REDOX FLOW BATTERIES; RENEWABLE ENERGY; ELECTROCHEMICAL PROPERTIES; STORAGE; SYSTEMS; INTEGRATION |
abstract |
Redox Flow Batteries (RFB) stand out as a promising energy storage technology to mitigate the irregular energy generation from renewable sources. However, some hurdles limit their massive implementation including high cost of vanadium and the poor-performance of ion-selective membranes. Recently, we presented a revolutionary Membrane-Free Battery based on organic aqueous/nonaqueous immiscible electrolytes that eludes both separators and vanadium compounds. Here, we demonstrate the feasible application of this archetype in Aqueous Biphasic Systems (ABS) acting as an unprecedented Total Aqueous Membrane-Free Battery. After evaluating several organic molecules, methylviologen (MV) and 2,2,6,6-Tetramethyl-1-piperidinyloxy (TEMPO) were selected as active species due to their optimum electrochemical behavior and selective partitioning between the phases. When connected electrically, this redox-active ABS becomes a Membrane-Free Battery with an open circuit voltage (OCV) of 1.23 V, high peak power density (23 mWcm(-2)) and excellent long-cycling performance (99.99% capacity retention over 550 cycles). Moreover, essential aspects of this technology such as the crossover, controlled here by partition coefficients, and the inherent self-discharge phenomena were addressed for the first time. These results point out the potential of this pioneering Total Aqueous Membrane-Free Battery as a new energy storage technology. |
publisher |
ELSEVIER |
issn |
2405-8297 |
year published |
2020 |
volume |
26 |
beginning page |
400 |
ending page |
407 |
digital object identifier (doi) |
10.1016/j.ensm.2019.11.011 |
web of science category |
Chemistry, Physical; Nanoscience & Nanotechnology; Materials Science, Multidisciplinary |
subject category |
Chemistry; Science & Technology - Other Topics; Materials Science |
unique article identifier |
WOS:000518197900037
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ciceco authors
impact metrics
journal analysis (jcr 2019):
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journal impact factor |
16.28 |
5 year journal impact factor |
Not Available |
category normalized journal impact factor percentile |
94.042 |
dimensions (citation analysis):
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altmetrics (social interaction):
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