Methods and systems for a lithium-ion battery cell cathode
AssigneeA123 Systems, Inc.
InventorsLinghong Zhang, Xiangyang Zhu, Taehwan Yu, Fanqun Li, Yang Chen, Xiaochong Zhou
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Abstract
Systems and methods for a lithium-ion battery cell are disclosed. In one example, a method for forming a cathode for a lithium-ion battery cell includes forming a pre-lithiated cathode with a pre-lithiation reagent and positioning the pre-lithiated cathode in contact with an electrolyte. An electrolyte additive is injected into the electrolyte to form a passivation layer at the pre-lithiated cathode, the passivation layer inhibiting continued decomposition of the pre-lithiation reagent of the pre-lithiated cathode after completion of a formation cycle of the lithium-ion battery cell.
Claims19
A method for forming a cathode for a lithium-ion battery cell, comprising:
- forming a pre-lithiated cathode with a pre-lithiation reagent;
- positioning the pre-lithiated cathode in contact with an electrolyte;
- and
- injecting an electrolyte additive into the electrolyte to form a passivation layer at the pre-lithiated cathode, the passivation layer inhibiting continued decomposition of the pre-lithiation reagent of the pre-lithiated cathode after completion of a formation cycle of the lithium-ion battery cell.
A lithium-ion battery cell, comprising:
- an electrolyte;
- a cathode in contact with the electrolyte and coated with a pre-lithiation reagent;
- an electrolyte additive added to the electrolyte;
- and
- a passivation layer coating the pre-lithiation reagent after an initial charging of the lithium-ion battery cell, wherein the passivation layer is formed of oxidized electrolyte additive.
A method for forming a lithium-ion battery cell, comprising:
- assembling components of the lithium-ion battery cell, the components including a pre-lithiated cathode with a pre-lithiation layer formed of a pre-lithiation reagent;
- adding an electrolyte to the lithium-ion battery cell, the electrolyte in contact with the pre-lithiated cathode;
- and
- injecting an electrolyte additive into the electrolyte to form a passivation layer over the pre-lithiation reagent of the pre-lithiated cathode, the passivation layer inhibiting gas formation by the pre-lithiation reagent.
Dependencies are inferred from the claim text.