Method of improving power density and fast-chargeability of a lithium secondary battery
AssigneeNanotek Instruments, Inc.
InventorsAruna Zhamu, Bor Z. Jang
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Abstract
Provided is a method of improving fast-dischargeability or high rate capability of a lithium secondary battery containing an anode, a cathode, a porous separator disposed between the anode and the cathode, and an electrolyte, wherein the method comprises packing particles of a cathode active material to form a cathode active material layer having interstitial spaces and disposing a lithium ion receptor in the interstitial spaces, configured to receive lithium ions from the anode through the porous separator when the battery is discharged and to enable the lithium ions to enter the particles of cathode active material in a time-delayed manner.
Claims25
A method of improving fast-dischargeability of a lithium secondary battery, wherein said battery comprises an anode, a cathode, a porous separator or lithium ion-permeable membrane disposed between said anode and said cathode, and an electrolyte, wherein said method comprises packing particles of a cathode active material to form a cathode active material layer having interstitial spaces and disposing a lithium ion receptor in said interstitial spaces, configured to receive lithium ions from said anode through said porous separator or membrane when said battery is discharged and to enable said lithium ions to enter said particles of cathode active material in a time-delayed manner.
A process for producing a fast-dischargeable lithium-ion battery, the process comprising:
- (A) forming a cathode active material layer by (i) mixing particles of a cathode active material with an ionic liquid or with lithium-capturing groups dispersed in a liquid medium to form a lithium ion-capturing fluid;
- and (ii) shaping the lithium ion-capturing fluid into a cathode active material layer in such a manner that this layer comprises the cathode active material particles packed together to form interstitial spaces that accommodate the lithium ion fluid disposed therein as a lithium ion receptor;
- and
- (B) combining this cathode active material layer, an electrolyte (electrolyte A) with an optional separator, and an anode to form a lithium-ion cell.
Dependencies are inferred from the claim text.