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Rechargeable Lithium Metal Batteries with an In-Built Solid-State Polymer Electrolyte and a High Voltage/Loading Ni-Rich Layered Cathode.

07:00 EST 13th February 2020 | BioPortfolio

Summary of "Rechargeable Lithium Metal Batteries with an In-Built Solid-State Polymer Electrolyte and a High Voltage/Loading Ni-Rich Layered Cathode."

Solid-state batteries enabled by solid-state polymer electrolytes (SPEs) are under active consideration for their promise as cost-effective platforms that simultaneously support high-energy and safe electrochemical energy storage. The limited oxidative stability and poor interfacial charge transport in conventional polymer electrolytes are well known, but difficult challenges must be addressed if high-voltage intercalating cathodes are to be used in such batteries. Here, ether-based electrolytes are in situ polymerized by a ring-opening reaction in the presence of aluminum fluoride (AlF ) to create SPEs inside LiNi Co Mn O (NCM) || Li batteries that are able to overcome both challenges. AlF plays a dual role as a Lewis acid catalyst and for the building of fluoridized cathode-electrolyte interphases, protecting both the electrolyte and aluminum current collector from degradation reactions. The solid-state NCM || Li metal batteries exhibit enhanced specific capacity of 153 mAh g under high areal capacity of 3.0 mAh cm . This work offers an important pathway toward solid-state polymer electrolytes for high-voltage solid-state batteries.

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This article was published in the following journal.

Name: Advanced materials (Deerfield Beach, Fla.)
ISSN: 1521-4095
Pages: e1905629

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