期刊
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
卷 142, 期 51, 页码 21393-21403出版社
AMER CHEMICAL SOC
DOI: 10.1021/jacs.0c09649
关键词
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资金
- American Association of University Women international fellowship
- Battery 500 Consortium Program Young Investigator Award
- Assistant Secretary for Energy Efficiency and Renewable Energy, Office of Vehicle Technologies of the U.S. Department of Energy under the Battery 500 Consortium program
- National Science Foundation [ECCS-1542152]
A fundamental challenge, shared across many energy storage devices, is the complexity of electrochemistry at the electrode-electrolyte interfaces that impacts the Coulombic efficiency, operational rate capability, and lifetime. Specifically, in energy-dense lithium metal batteries, the charging/discharging process results in structural heterogeneities of the metal anode, leading to battery failure by short-circuit and capacity fade. In this work, we take advantage of organic cations with lower reduction potential than lithium to build an electrically responsive polymer interface that not only adapts to morphological perturbations during electrodeposition and stripping but also modulates the lithium ion migration pathways to eliminate surface roughening. We find that this concept can enable prolonging the long-term cycling of a high-voltage lithium metal battery by at least twofold compared to bare lithium metal.
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