Room‐Temperature Liquid Na–K Anode Membranes

Xue, Leigang; Zhou, Weidong; Xin, Sen; Gao, Hongcai; Li, Yutao; Zhou, Aijun; Goodenough, John B.

doi:10.1002/anie.201809622

Room‐Temperature Liquid Na–K Anode Membranes

Journal Article · Fri Oct 05 00:00:00 EDT 2018 · Angewandte Chemie (International Edition)

DOI:https://doi.org/10.1002/anie.201809622· OSTI ID:1476658

^[1]; Zhou, Weidong ^[2]; Xin, Sen ^[1]; Gao, Hongcai ^[1]; Li, Yutao ^[1]; Zhou, Aijun ^[3]; ^[1]

Texas Materials Institute The University of Texas at Austin Austin TX 78712 USA
Texas Materials Institute The University of Texas at Austin Austin TX 78712 USA, Beijing Advanced Innovation Center for Soft Matter Science and Engineering Beijing University of Chemical Technology Beijing 100029 China
Texas Materials Institute The University of Texas at Austin Austin TX 78712 USA, School of Materials and Energy University of Electronic Science and Technology of China Chengdu 610054 China

Abstract

The Na–K alloy is a liquid at 25 °C over a large compositional range. The liquid alloy is also immiscible in the organic‐liquid electrolytes of an alkali‐ion rechargeable battery, providing dendrite‐free liquid alkali‐metal batteries with a liquid–liquid anode‐electrolyte interface at room temperature. The two liquids are each immobilized in a porous matrix. In previous work, the porous matrix used to immobilize the alloy was a carbon paper that is wet by the alloy at 420 °C; the alloy remains in the paper at room temperature. Here we report a room‐temperature vacuum infiltration of the alloy into a porous Cu or Al membrane and a reversible stripping/plating of the liquid alloy with the immobilized organic‐liquid electrolyte; no self‐diacharge is observed since the liquid Na–K does not dissolve into the liquid carbonate electrolytes. The preparation and stripping/plating of the liquid alkali‐metal anode can both now be done safely at room temperature.

View Accepted Manuscript (Publisher)

Sponsoring Organization:: USDOE

Grant/Contract Number:: NONE; EE0007762

OSTI ID:: 1476658

Alternate ID(s):: OSTI ID: 1614039

Journal Information:: Angewandte Chemie (International Edition), Journal Name: Angewandte Chemie (International Edition) Journal Issue: 43 Vol. 57; ISSN 1433-7851

Publisher:: Wiley Blackwell (John Wiley & Sons)Copyright Statement

Country of Publication:: Germany

Language:: English

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