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oai:riubu.ubu.es:10259/63612022-11-17T11:39:17Zcom_10259_3593com_10259_5086com_10259_2604com_10259_5822col_10259_3594col_10259_5823

Páez, Teresa Zhang, FeiFei Lubian, Lara Xi, Shibo Wang, Qing Palma, Jesús Muñoz Torres, Miguel Ángel Sanz Díez, Roberto Ventosa Arbaizar, Edgar 2022-01-26T13:09:12Z 2022-01-26T13:09:12Z 2022-01 1614-6832 http://hdl.handle.net/10259/6361 10.1002/aenm.202102866 1614-6840 Each battery technology possesses intrinsic advantages and disadvantages, e.g., nickel–metal hydride (MH) batteries offer relatively high specific energy and power as well as safety, making them the power of choice for hybrid electric vehicles, whereas aqueous organic flow batteries (AORFBs) offer sustainability, simple replacement of their active materials and independent scalability of energy and power, making them very attractive for stationary energy storage. Herein, a new battery technology that merges the above mentioned battery technologies through the use of redox-mediated reactions is proposed that intrinsically possesses the main features of each separate technology, e.g., high energy density of the solid active materials, easy recyclability, and independent scalability of energy and power. To achieve this, Ni(OH)2 and MHs are confined in the positive and negative reservoirs of an AORFB that employs alkaline solutions of potassium ferrocyanide and a mixture of 2,6-dihydroxyanthraquinone and 7,8-dihydroxyphenazine-2-sulfonic acid as catholyte and anolyte, respectively. An energy density of 128 Wh L–1 is achieved based on the capacity of the reservoirs leaving ample room for improvement up to the theoretical limit of 378 Wh L–1. This new battery technology opens up new market opportunities never before envisaged, for redox flow batteries, e.g., domestic energy storage and heavy-duty vehicle transportation. Spanish Government through the Research Challenges Programme (Grant No. RTI2018-099228-A-I00). E.V. thanks the MINECO for the financial support (RYC2018-026086-I). application/pdf eng Wiley Advanced Energy Materials. 2022, V. 12, n. 1, 2102866 https://doi.org/10.1002/aenm.202102866 info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/RTI2018-099228-A-I00/ES/BATERIAS INJECTABLES DE ELECTRODES SEMI-SOLIDOS info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/RYC2018-026086-I Atribución-NoComercial 4.0 Internacional http://creativecommons.org/licenses/by-nc/4.0/ info:eu-repo/semantics/openAccess Electrochemistry Redox flow batteries Redox mediators Redox targeting Solid boosters Química analítica Chemistry, Analytic The Redox‐Mediated Nickel–Metal Hydride Flow Battery info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Advanced Energy Materials 12 1 2102866