Controlling electric potential to inhibit solid-electrolyte interphase formation on nanowire anodes for ultrafast lithium-ion batteries.
Controlling electric potential to inhibit solid-electrolyte interphase formation on nanowire anodes for ultrafast lithium-ion batteries.
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DOI：
10.1038/s41467-018-05986-9
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发表时间：
2018-08-27
影响因子：
16.6
通讯作者：
Il Park W
中科院分区：
文献类型：
--
作者：
Chang WJ;Kim SH;Hwang J;Chang J;Yang DW;Kwon SS;Kim JT;Lee WW;Lee JH;Park H;Song T;Lee IH;Whang D;Il Park W
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). Lithium-based rechargeable batteries suffer from unstable evolution of solid-electrolyte interphase on the electrode surface. Here, the authors provide an approach to inhibiting SEI formation by controlling electric potential distribution across electrolyte and electrode.
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影响因子：
10.8
作者：
Kim, Joondong;Anderson, Wayne A.
通讯作者：
Anderson, Wayne A.
影响因子：
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作者：
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10.8
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通讯作者：
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10.8
作者：
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通讯作者：
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