Pre-doped anodes and methods and apparatuses for making same
AssigneeMaxwell Technologies, Inc.
InventorsSanthanam RAMAN, Xiang-Rong YE, Xiaomei XI
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Abstract
An energy storage device can include a cathode, an anode, and a separator between the cathode and the anode, where the anode can have a desired lithium pre-doping level to facilitate desired capacitor performance. Controlled anode pre-doping can include printing lithium powder or a mixture including lithium powder onto a surface of the anode. Controlled anode pre-doping can include electrochemically incorporating lithium ions into the anode. A duration of the pre-doping process can be selected such that desired anode pre-doping is achieved.
Claims26
An energy storage device comprising:
- a cathode;
- an anode comprising intercalated lithium ions;
- and
- a separator between the cathode and the anode;
- wherein the intercalated lithium ions are present in an amount selected to limit lithium metal plating and to limit gassing;
- and
- wherein the amount of intercalated lithium ions corresponds to an anode voltage of about 0.05 to about 0.3 V compared to an Li/Li+ reference voltage.
An energy storage device comprising:
- a first electrode comprising lithium ions adsorbed to a first electrode surface;
- a second electrode;
- a separator between the first electrode and the second electrode;
- and
- an electrolyte comprising a lithium salt;
- wherein the lithium ions are present on the first electrode surface in an amount corresponding to a first electrode voltage of about 0.05 to about 0.3 V following pre-doping, and before use, compared to an Li/Li+ reference voltage.
A method for fabricating an energy storage device comprising:
- electrically coupling a lithium metal source and an electrode film;
- and
- doping the electrode film with lithium ions to a predetermined electrode voltage of about 0.05 to about 0.3 V compared to an Li/Li+ reference voltage.
Dependencies are inferred from the claim text.