Photo-accelerated fast charging of lithium-ion batteries

Anna Lee, Márton Vörös, Wesley M. Dose, Jens Niklas, Oleg Poluektov, Richard D. Schaller, Hakim Iddir, Victor A. Maroni, Eungje Lee, Brian Ingram, Larry A. Curtiss and Christopher S. Johnson ()
Additional contact information
Anna Lee: Argonne National Laboratory
Márton Vörös: Argonne National Laboratory
Wesley M. Dose: Argonne National Laboratory
Jens Niklas: Argonne National Laboratory
Oleg Poluektov: Argonne National Laboratory
Richard D. Schaller: Argonne National Laboratory
Hakim Iddir: Argonne National Laboratory
Victor A. Maroni: Argonne National Laboratory
Eungje Lee: Argonne National Laboratory
Brian Ingram: Argonne National Laboratory
Larry A. Curtiss: Argonne National Laboratory
Christopher S. Johnson: Argonne National Laboratory

Nature Communications, 2019, vol. 10, issue 1, 1-7

Abstract: Abstract Due to their exceptional high energy density, lithium-ion batteries are of central importance in many modern electrical devices. A serious limitation, however, is the slow charging rate used to obtain the full capacity. Thus far, there have been no ways to increase the charging rate without losses in energy density and electrochemical performance. Here we show that the charging rate of a cathode can be dramatically increased via interaction with white light. We find that a direct exposure of light to an operating LiMn2O4 cathode during charging leads to a remarkable lowering of the battery charging time by a factor of two or more. This enhancement is enabled by the induction of a microsecond long-lived charge separated state, consisting of Mn4+ (hole) plus electron. This results in more oxidized metal centers and ejected lithium ions are created under light and with voltage bias. We anticipate that this discovery could pave the way to the development of new fast recharging battery technologies.

Date: 2019
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DOI: 10.1038/s41467-019-12863-6

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