Patent ID: 9085076
Filing Date: 2015-07-21
Classification: B25F,H01G,H01M,H02M,Y02B,Y02E,Y02P

Abstract:
1. A portable power tool electrically powered by a surface-mediated cell-based power source, said portable power tool comprising an electric motor, actuator, or light-emitting hardware and a rechargeable power source electrically connected to said electric motor, actuator, or light-emitting hardware and providing electric power thereto, wherein said power source contains at least a surface-mediated cell (SMC), which is a rechargeable cell that operates by reversibly storing lithium ions on surfaces of a cathode active material, wherein said surface-mediated cell comprises: (a) a positive electrode or cathode comprising a porous cathode current collector and/or a cathode active material having a surface area to capture or store lithium thereon; (b) a negative electrode or anode comprising an anode current collector only or comprising an anode current collector and an anode active material having a surface area to capture or store lithium thereon; (c) a porous separator disposed between the cathode and the anode and soaked with a lithium-containing electrolyte; and (d) a lithium source disposed in the anode or the cathode, wherein the anode active material and/or the cathode active material has a specific surface area of no less than 100 m 2 /g which is in direct physical contact with the electrolyte to receive lithium ions therefrom or to provide lithium ions thereto.