Controlling electric potential to inhibit solid-electrolyte interphase formation on nanowire anodes for ultrafast lithium-ion batteries

Won Jun Chang, Su Han Kim, Jiseon Hwang, Jinho Chang, Dong won Yang, Sun Sang Kwon, Jin Tae Kim, Won Woo Lee, Jae Hyung Lee, Hyunjung Park, Taeseup Song, In-Hwan Lee, Dongmok Whang and Won Park ()
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Won Jun Chang: Hanyang University
Su Han Kim: Hanyang University
Jiseon Hwang: Hanyang University
Jinho Chang: Hanyang University
Dong won Yang: Hanyang University
Sun Sang Kwon: Hanyang University
Jin Tae Kim: Hanyang University
Won Woo Lee: Hanyang University
Jae Hyung Lee: Hanyang University
Hyunjung Park: Hanyang University
Taeseup Song: Hanyang University
In-Hwan Lee: Sungkyunkwan University
Dongmok Whang: Sungkyunkwan University
Won Park: Hanyang University

Nature Communications, 2018, vol. 9, issue 1, 1-8

Abstract: Abstract With increasing demand for high-capacity and rapidly rechargeable anodes, problems associated with unstable evolution of a solid-electrolyte interphase on the active anode surface become more detrimental. Here, we report the near fatigue-free, ultrafast, and high-power operations of lithium-ion battery anodes employing silicide nanowires anchored selectively to the inner surface of graphene-based micro-tubular conducting electrodes. This design electrically shields the electrolyte inside the electrode from an external potential load, eliminating the driving force that generates the solid-electrolyte interphase on the nanowire surface. Owing to this electric control, a solid-electrolyte interphase develops firmly on the outer surface of the graphene, while solid-electrolyte interphase-free nanowires enable fast electronic and ionic transport, as well as strain relaxation over 2000 cycles, with 84% capacity retention even at ultrafast cycling (>20C). Moreover, these anodes exhibit unprecedentedly high rate capabilities with capacity retention higher than 88% at 80C (vs. the capacity at 1C).

Date: 2018
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DOI: 10.1038/s41467-018-05986-9

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