VITREOUS SOLID ELECTROLYTE SHEETS OF Li ION CONDUCTING SULFUR-BASED GLASS AND ASSOCIATED STRUCTURES, CELLS AND METHODS

Patent metadata

Field	Value
Publication number	US-2021098818-A1
Application number	US-202016948835-A
Country	US
Kind code	A1
Filing date	Oct 1, 2020
Priority date	Dec 2, 2014
Publication date	Apr 1, 2021
Grant date	—

Abstract

A lithium ion-conductive solid electrolyte including a freestanding inorganic vitreous sheet of sulfide-based lithium ion conducting glass is capable of high performance in a lithium metal battery by providing a high degree of lithium ion conductivity while being highly resistant to the initiation and/or propagation of lithium dendrites. Such an electrolyte is also itself manufacturable, and readily adaptable for battery cell and cell component manufacture, in a cost-effective, scalable manner.

First claim

1 . A standalone Li ion conductive solid electrolyte separator comprising:
a freestanding substantially amorphous solid electrolyte wall structure that is dense, inorganic and highly conductive of Li ions, the wall structure comprising: i) a continuous Li ion conducting inorganic amorphous material phase with room temperature Li ion conductivity ≥10 −5 S/cm; ii) first and second opposing principal sides and associated surfaces; and ii) a microstructure devoid of contiguous crystalline grain boundaries and powder particle boundaries extending between the opposing principal side surfaces.

2 - 52 . (canceled)

53 . A method for making a standalone Li ion conductive solid electrolyte separator, the method comprising making a vitreous solid sheet of Li ion conducting sulfur-based glass; wherein the method for making the vitreous sheet comprises the steps of:
a. forming a continuous fluid sheet of an inorganic sulfur-based glass at a temperature above T g of the glass, the fluid sheet having substantially parallel lengthwise edges and a high quality center portion having first and second opposing principal side surfaces; b. causing the continuous fluid sheet to flow with unbroken continuity; c. solidifying the continuous fluid sheet by cooling it to a temperature below T g ; wherein the solidified fluid sheet of sulfur-based glass is vitreous, substantially amorphous, highly conductive of Li ions, and of unbroken continuity.

54 - 105 . (canceled)

106 . A method of making a Li electrode assembly, the method comprising the steps of:
i. providing a freestanding and vitreous solid electrolyte sheet of Li ion conducting sulfur-based glass having first and second principal opposing sides and associated surfaces; and ii. applying a fresh surface of lithium metal directly onto the first principal side surface of the vitreous solid electrolyte sheet.

107 - 120 . (canceled)

Assignees

• Polyplus Battery Co Inc

Inventors

• Visco Steven J
• Nimon Yevgeniy S
• De Jonghe Lutgard C
• Katz Bruce D
• Nimon Vitaliy

Classifications

• H01M50/497

  Ionic conductivity · CPC title

• H01M50/489

  Separators, membranes, diaphragms or spacing elements inside the cells, characterised by their physical properties, e.g. swelling degree, hydrophilicity or shut down properties · CPC title

• H01M50/437

  Glass · CPC title

• Y02E60/10

  Energy storage using batteries · CPC title

• Y02P70/50

  Manufacturing or production processes characterised by the final manufactured product · CPC title