LITHIUM METAL SECONDARY BATTERY CONTAINING ELASTIC POLYMER FOAM AS AN ANODE-PROTECTING LAYER
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United States of America Patent
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Issued Date -
Jul 30, 2020
app pub date -
Jan 24, 2019
filing date -
Jan 24, 2019
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Abstract
Provided is a lithium metal secondary battery comprising a cathode, an anode, an electrolyte-separator assembly disposed between the cathode and the anode, wherein the anode comprises: (a) an anode active material layer containing a layer of lithium or lithium alloy optionally supported by an anode current collector; and (b) an anode-protecting layer in physical contact with the anode active material layer and in ionic contact with the electrolyte-separator assembly, having a thickness from 10 nm to 500 μm and comprising an elastic polymer foam having a fully recoverable elastic compressive strain from 2% to 500% and pores having a pore volume fraction from 5% to 95% (most preferably 50-95%); wherein preferably the pores are interconnected.
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