期刊
ELECTROCHIMICA ACTA
卷 283, 期 -, 页码 517-527出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2018.06.177
关键词
Lithium metal anode; Lithium dendrite; Nanoporous nanosheet; Na metal anode; Lithium-sulfur battery
资金
- Purdue University
- Davidson School of Chemical Engineering
- Office of Naval Research under Naval Enterprise Partnership Teaming with Universities for National Excellence (NEPTUNE Phase I) at Purdue Center for Power and Energy Research [N00014-15-1-2833]
- Office of Naval Research under Naval Enterprise Partnership Teaming with Universities for National Excellence (NEPTUNE Phase II) at Purdue Center for Power and Energy Research [N00014-15-1-2833]
- Office of Naval Research [N00014-18-1-2397]
- Assistant Secretary for Energy Efficiency and Renewable Energy, Office of Vehicle Technologies of the U.S. Department of Energy [DE-EE0006832]
- Assistant Secretary for Energy Efficiency and Renewable Energy, Office of Vehicle Technologies of the U.S. Department of Energy under Advanced Battery Materials Research (BMR) Program
Lithium (Li) metal has received huge attention as a promising anode candidate due to its high theoretical capacity, the lowest negative potential, and its potential as next-generation energy storage devices (such as Li-S and Li-O-2 batteries), where Li metal electrode is indispensable for the system. However, systemic issues, which are mainly associated with Li dendritic growth, result in poor electrochemical performances and safety problems (e.g. short-circuit). This article describes a unique design of multifunctional membrane, comprising of nanoporous inorganic (SiO2) nanosheet layer, in order to uniformly distribute metal-ion flux and delay the penetration of Li dendrites through the separator. When a designed membrane was employed, the propagation of Li dendrites against the separator was dramatically restrained and suppressed by structural and materialistic benefits of nanoporous inorganic (SiO2) nanosheets, thus leading to the significant enhancement of electrochemical performances of Li metal batteries. Similar to Li metal batteries, it showed analogous promising results and possibilities in achieving high electrochemical stabilities and cycle performances of Na metal batteries. Moreover, Li-S prototype cell coupled with a designed membrane delivered stable cycle retention (over 400 cycles) with high Coulombic efficiency by selectively allowing Li ions to pass through membrane but suppressing the migration of polysulfides. (C) 2018 Elsevier Ltd. All rights reserved.
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