Abstract: An electrochemical cell having a casing housing an electrode assembly of a separator residing between a lithium anode and a cathode comprising silver vanadium oxide and fluorinated carbon is described. The electrode assembly is activated with a nonaqueous electrolyte comprising a lithium salt dissolved in a solvent system of propylene carbonate mixed with 1,2-dimethoxyethane, dibenzyl carbonate (DBC), lithium bis(oxalato)borate (LiBOB), and fluoroethylene carbonate (FEC). Preferably DBC is present in an amount ranging from about 0.005 moles (M) to about 0.25M, LiBOB is present in an amount ranging from about 0.005 wt. 5 to about 5 wt. %, and FEC is present in an amount ranging from about 0.01 wt. % to about 10 wt. %. This electrolyte formulation is more conductive than the conventional or prior art binary and ternary solvent system electrolytes while being chemically and electrochemically stable toward Li/SVO cells, Li-SVO/CFx mixture cells, and Li-SVO/CFx sandwich cathode primary electrochemical cells.

Abstract: An electrochemical cell having a casing housing an electrode assembly of a separator residing between a lithium anode and a cathode comprising silver vanadium oxide and fluorinated carbon is described. The electrode assembly is activated with a nonaqueous electrolyte comprising a lithium salt dissolved in a solvent system of propylene carbonate mixed with 1,2-dimethoxyethane, lithium bis(oxalato)borate (LiBOB), and fluoroethylene carbonate (FEC). Preferably LiBOB is present in an amount ranging from about 0.005 wt. 5 to about 5 wt. %, and FEC is present in an amount ranging from about 0.01 wt. % to about 10 wt. %. This electrolyte formulation is more conductive than the conventional or prior art binary and ternary solvent system electrolytes while being chemically and electrochemically stable toward Li/SVO cells, Li-SVO/CFx mixture cells, and Li-SVO/CFx sandwich cathode primary electrochemical cells.

Abstract: An electrochemical cell having a casing housing an electrode assembly of a separator residing between a lithium anode and a cathode comprising silver vanadium oxide and fluorinated carbon is described. The electrode assembly is activated with a nonaqueous electrolyte comprising a lithium salt dissolved in a solvent system of propylene carbonate mixed with 1,2-dimethoxyethane, dibenzyl carbonate (DBC), lithium bis(oxalato)borate (LiBOB), and fluoroethylene carbonate (FEC). Preferably DBC is present in an amount ranging from about 0.005 moles (M) to about 0.25M, LiBOB is present in an amount ranging from about 0.005 wt. 5 to about 5 wt. %, and FEC is present in an amount ranging from about 0.01 wt. % to about 10 wt. %. This electrolyte formulation is more conductive than the conventional or prior art binary and ternary solvent system electrolytes while being chemically and electrochemically stable toward Li/SVO cells, Li-SVO/CFx mixture cells, and Li-SVO/CFx sandwich cathode primary electrochemical cells.

Abstract: A lithium electrochemical cell with increased energy density is described. The electrochemical cell comprises an improved sandwich cathode design with a second cathode active material of a relatively high energy density but of a relatively low rate capability sandwiched between two current collectors and with a first cathode active material having a relatively low energy density but of a relatively high rate capability in contact with the opposite sides of the two current collectors. In addition, a cathode fabrication process is described that increases manufacturing efficiency. The cathode fabrication process comprises a process in which first and second cathode active materials are directly applied to opposite surfaces of a perforated current collector and laminated together. The present cathode design is useful for powering an implantable medical device requiring a high rate discharge application.

Abstract: A current collector for an electrochemical cell is described. Unlike conventional current collector designs, the current collector does not have an unperforated perimeter frame completely bordering or surrounding a perforated interior region. Instead, only that portion of the current collector adjacent to the connector tab is unperforated. Otherwise, perforations extend directly to the perimeter edge.

Abstract: Disclosed herein are electrochemical cells that generally relate to the conversion of chemical energy to electrical energy. More particularly, the present disclosure is directed to primary lithium electrochemical cells possessing insulator pocket structures, which substantially envelope cathode components to prevent lithium cluster formation therein.

Abstract: An electrochemical cell comprising a cathode and an anode residing within a casing, the anode being positioned distal of the cathode. The cathode having a cathode current collector having an angled configuration that encourages the cathode active material to move in an axial distal direction during cell discharge. The cathode current collector may be configured having at least one fold thereby dividing the current collector into at least two portions having an angle therebetween. The cathode current collector may comprise a wire having a helical configuration or the cathode current collector may comprise a post with a thread having a helical orientation about the post exterior. A preferred chemistry is a lithium/CFx activated with a nonaqueous electrolyte.

Abstract: A lithium electrochemical cell with increased energy density is described. The electrochemical cell comprises an improved sandwich cathode design with a second cathode active material of a relatively high energy density but of a relatively low rate capability sandwiched between two current collectors and with a first cathode active material having a relatively low energy density but of a relatively high rate capability in contact with the opposite sides of the two current collectors. In addition, a cathode fabrication process is described that increases manufacturing efficiency. The cathode fabrication process comprises a process in which first and second cathode active materials are directly applied to opposite surfaces of a perforated current collector and laminated together. The present cathode design is useful for powering an implantable medical device requiring a high rate discharge application.

Abstract: A lithium electrochemical cell with increased energy density is described. The electrochemical cell comprises an improved sandwich cathode design with a second cathode active material of a relatively high energy density but of a relatively low rate capability sandwiched between two current collectors and with a first cathode active material having a relatively low energy density but of a relatively high rate capability in contact with the opposite sides of the two current collectors. In addition, a cathode fabrication process is described that increases manufacturing efficiency. The cathode fabrication process comprises a process in which first and second cathode active materials are directly applied to opposite surfaces of a perforated current collector and laminated together. The present cathode design is useful for powering an implantable medical device requiring a high rate discharge application.

Abstract: Disclosed herein are electrochemical cells that generally relate to the conversion of chemical energy to electrical energy. More particularly, the present disclosure is directed to primary lithium electrochemical cells possessing insulator pocket structures, which substantially envelope cathode components to prevent lithium cluster formation therein.

Abstract: An electrochemical cell comprising a cathode and an anode residing within a casing, the anode being positioned distal of the cathode. The cathode having a cathode current collector having an angled configuration that encourages the cathode active material to move in an axial distal direction during cell discharge. The cathode current collector may be configured having at least one fold thereby dividing the current collector into at least two portions having an angle therebetween. The cathode current collector may comprise a wire having a helical configuration or the cathode current collector may comprise a post with a thread having a helical orientation about the post exterior. A preferred chemistry is a lithium/CFx activated with a nonaqueous electrolyte.

Abstract: A lithium electrochemical cell with increased energy density is described. The electrochemical cell comprises an improved sandwich cathode design with a second cathode active material of a relatively high energy density but of a relatively low rate capability sandwiched between two current collectors and with a first cathode active material having a relatively low energy density but of a relatively high rate capability in contact with the opposite sides of the two current collectors. In addition, a cathode fabrication process is described that increases manufacturing efficiency. The cathode fabrication process comprises a process in which first and second cathode active materials are directly applied to opposite surfaces of a perforated current collector and laminated together. The present cathode design is useful for powering an implantable medical device requiring a high rate discharge application.

Abstract: An electrochemical cell comprising a lithium anode, a silver vanadium oxide cathode having a relatively lower basis weight, and an electrolyte activating the anode and the cathode is described. By limiting the amount of cathode active material per unit area (i.e. basis weight) facing the anode in the Li/SVO cell, the magnitude of the passivating film growth at the solid-electrolyte interphase (SEI) and its relative impermeability to lithium ion diffusion is reduced. Therefore, by using a cathode of a relatively low basis weight active material, it is possible to eliminate or significantly reduce undesirable irreversible Rdc growth and voltage delay in the cell and to extend its useful life in an implantable medical device.