Anode interlayer for all-solid-state batteries and method of manufacturing the all-solid-state batteries
A method of manufacturing an all-solid-state battery cell includes depositing an interlayer directly onto an anode current collector; depositing a solid electrolyte onto the interlayer opposite the anode current collector; forming a cathode on the solid electrolyte opposite the interlayer, wherein the cathode contains one or more lithium-containing compounds; and applying pressure to achieve uniform contact between layers. The manufactured all-solid-state battery cell is anode-free prior to charging. The interlayer is configured such that lithium metal is deposited between the interlayer and the anode current collector during charging, the interlayer prevents contact between the lithium metal and the solid electrolyte, and the interlayer has a greater density than a density of the solid electrolyte.
1. An all-solid-state battery cell, comprising:
an anode current collector;
a solid electrolyte; and
an interlayer between the anode current collector and the solid electrolyte, the interlayer configured wherein:
the interlayer is selected from the group consisting of Li 2 Se and LiNbO 2 ;
lithium metal is deposited between the interlayer and the anode current collector during charging;
the interlayer prevents contact between the lithium metal and the solid electrolyte; and
the interlayer has a greater density than a density of the solid electrolyte.
2. The all-solid-state battery cell of claim 1 , wherein a lithium ionic conductivity of the interlayer is greater than an electronic conductivity of the interlayer.
3. The all-solid-state battery cell of claim 1 , wherein the interlayer is a material with a stable potential window of 0 V to 2.0 V against lithium.
4. The all-solid-state battery cell of claim 1 , wherein the interlayer has a thickness of at least 100 nm.
5. The all-solid-state battery cell of claim 1 , further comprising a cathode and a cathode current collector.
6. The all-solid-state battery cell of claim 1 , wherein the solid electrolyte is a sulfide compound.