Light-assisted delithiation of lithium iron phosphate nanocrystals towards photo-rechargeable lithium ion batteries

Andrea Paolella, Cyril Faure, Giovanni Bertoni, Sergio Marras, Abdelbast Guerfi, Ali Darwiche, Pierre Hovington, Basile Commarieu, Zhuoran Wang, Mirko Prato, Massimo Colombo, Simone Monaco, Wen Zhu, Zimin Feng, Ashok Vijh, Chandramohan George, George P. Demopoulos (), Michel Armand and Karim Zaghib ()
Additional contact information
Andrea Paolella: Institute de Recherche d-Hydro-Québec (IREQ)
Cyril Faure: Institute de Recherche d-Hydro-Québec (IREQ)
Giovanni Bertoni: IMEM-CNR
Sergio Marras: Istituto Italiano di Tecnologia
Abdelbast Guerfi: Institute de Recherche d-Hydro-Québec (IREQ)
Ali Darwiche: Institute de Recherche d-Hydro-Québec (IREQ)
Pierre Hovington: Institute de Recherche d-Hydro-Québec (IREQ)
Basile Commarieu: Institute de Recherche d-Hydro-Québec (IREQ)
Zhuoran Wang: McGill University
Mirko Prato: Istituto Italiano di Tecnologia
Massimo Colombo: Istituto Italiano di Tecnologia
Simone Monaco: Istituto Italiano di Tecnologia
Wen Zhu: Institute de Recherche d-Hydro-Québec (IREQ)
Zimin Feng: Institute de Recherche d-Hydro-Québec (IREQ)
Ashok Vijh: Institute de Recherche d-Hydro-Québec (IREQ)
Chandramohan George: Institute for Manufacturing, University of Cambridge
George P. Demopoulos: McGill University
Michel Armand: Cicenergigune Parque Tecnologico
Karim Zaghib: Institute de Recherche d-Hydro-Québec (IREQ)

Nature Communications, 2017, vol. 8, issue 1, 1-10

Abstract: Abstract Recently, intensive efforts are dedicated to convert and store the solar energy in a single device. Herein, dye-synthesized solar cell technology is combined with lithium-ion materials to investigate light-assisted battery charging. In particular we report the direct photo-oxidation of lithium iron phosphate nanocrystals in the presence of a dye as a hybrid photo-cathode in a two-electrode system, with lithium metal as anode and lithium hexafluorophosphate in carbonate-based electrolyte; a configuration corresponding to lithium ion battery charging. Dye-sensitization generates electron–hole pairs with the holes aiding the delithiation of lithium iron phosphate at the cathode and electrons utilized in the formation of a solid electrolyte interface at the anode via oxygen reduction. Lithium iron phosphate acts effectively as a reversible redox agent for the regeneration of the dye. Our findings provide possibilities in advancing the design principles for photo-rechargeable lithium ion batteries.

Date: 2017
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DOI: 10.1038/ncomms14643

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