Generation of wrinkle-free silicon monoxide electrodes using separate preformation and formation
A solid electrolyte interface is grown on a silicon monoxide electrode in a battery cell, including by charging the battery cell up to a first voltage while the battery cell is uncompressed in order to partially grow the solid electrolyte interface. After partially growing the partial solid electrolyte interface, the battery cell is rested. After resting the battery cell, the battery cell is charged to a second, higher voltage while the battery cell is compressed in order to further grow the partially grown solid electrolyte interface. After the solid electrolyte interface is grown on the silicon monoxide electrode, the battery cell is charged for one or more cycles while the battery cell is compressed.
1. A method, comprising:
growing a solid electrolyte interface on a silicon monoxide electrode in a battery cell, including by:
filling the battery cell with liquid electrolyte;
compressing the battery cell filled with the liquid electrolyte for a predetermined amount of time;
uncompressing the battery cell after the predetermined amount of time has passed;
charging the battery cell up to a first voltage while the battery cell is uncompressed in order to partially grow the solid electrolyte interface;
after partially growing the solid electrolyte interface, resting the battery cell while the battery cell is uncompressed and without applying charge to the battery cell;
after resting the battery cell:
compressing the battery cell; and
charging the battery cell up to a second voltage while the battery cell is compressed in order to further grow the partially grown solid electrolyte interface, wherein the second voltage is higher than the first voltage; and
after the solid electrolyte interface is grown on the silicon monoxide electrode, charging and discharging the battery cell for one or more cycles while the battery cell is compressed.
2. The method recited in claim 1 , wherein:
the battery cell is charged up to the first voltage over a period of 100 hours; and
the battery cell is charged up to the second voltage over a period of 30 hours.
3. The method recited in claim 1 , wherein the battery cell is charged up to the second voltage while the battery cell is compressed at a pressure within a range of 20 psi-60 psi.
4. The method recited in claim 1 , wherein:
the battery cell is charged up to the first voltage of 3.65 V;
the battery cell is held at the first voltage of 3.65 V while the battery cell is resting; and
the battery cell is charged up to the second voltage of 3.85 V.
5. The method recited in claim 1 further comprising:
after the solid electrolyte interface is grown on the silicon monoxide electrode and before the battery cell is charged and discharged for the one or more cycles while the battery cell is compressed, compressing the battery cell at room temperature; and
after the battery cell is charged for the one or more cycles while the battery cell is compressed, compress the battery cell while the battery cell is heated.
6. The method recited in claim 1 further comprising:
after the solid electrolyte interface is grown on the silicon monoxide electrode and before the battery cell is charged and discharged for the one or more cycles while the battery cell is compressed, compressing the battery cell at a pressure within a range of 100 psi-200 psi at room temperature; and
after the battery cell is charged for the one or more cycles while the battery cell is compressed, compress the battery cell at a pressure within a range of 100 psi-200 psi while the battery cell is heated.
7. The method recited in claim 1 further comprising:
after the solid electrolyte interface is grown on the silicon monoxide electrode and before the battery cell is charged and discharged for the one or more cycles while the battery cell is compressed, compressing the battery cell at room temperature within a range of 25° C.-50° C.; and
after the battery cell is charged for the one or more cycles while the battery cell is compressed, compress the battery cell while the battery cell is heated to a temperature within a range of 60° C.-100° C.
8. A computer program product, the computer program product being embodied in a non-transitory computer readable storage medium and comprising computer instructions for:
growing a solid electrolyte interface on a silicon monoxide electrode in a battery cell, including by:
filling the battery cell with liquid electrolyte;
compressing the battery cell filled with the liquid electrolyte for a predetermined amount of time;
uncompressing the battery cell after the predetermined amount of time has passed;
charging the battery cell up to a first voltage while the battery cell is uncompressed in order to partially grow the solid electrolyte interface;
after partially growing the solid electrolyte interface, resting the battery cell while the battery cell is uncompressed and without applying charge to the battery cell;
after resting the battery cell:
compressing the battery cell; and
charging the battery cell up to a second voltage while the battery cell is compressed in order to further grow the partially grown solid electrolyte interface, wherein the second voltage is higher than the first voltage; and
after the solid electrolyte interface is grown on the silicon monoxide electrode, charging and discharging the battery cell for one or more cycles while the battery cell is compressed.