초록 ▼

Lithium is laminated onto or into an electrode structure comprising a metal conducting layer with an active material mixture of, for example, a nano-composite of silicon monoxide, together with graphite and a binder, such as polyvinyl di-fluoride (PVDF). The lamination of lithium metal onto or into

Lithium is laminated onto or into an electrode structure comprising a metal conducting layer with an active material mixture of, for example, a nano-composite of silicon monoxide, together with graphite and a binder, such as polyvinyl di-fluoride (PVDF). The lamination of lithium metal onto or into the electrode structure will reduce the amount of irreversible capacity by readily supplying a sufficient amount of lithium ions to form the initial solid electrolyte interface. In order to laminate lithium metal onto or into the negative electrode, the lithium is first deposited onto a carrier, which is then used to laminate the lithium metal onto or into the electrode structure. The next step is placing the coated electrode material and the lithium-deposited plastic between two rollers or two plates. Plates are heated to about 120° C. or within the range of 25° C. to 250° C. A pressure of 50 kg/cm 2 to 600 kg/cm 2 is applied to the rollers. The speed of movement of the materials through the roller pair or the plate pair is in the range of 10 cm/min. The method can be used for either single-sided or double-sided coating. Using this technology alone, the battery capacity can increase by 7% to 15%.

대표청구항 ▼

1. A method to laminate lithium onto an electrode comprising the steps of:(a) utilizing an electrode structure including a substrate coated with active material;(b) utilizing a lithium coated plastic sheet;(c) pressing the said electrode material and said lithium coated sheet together using a pair o

1. A method to laminate lithium onto an electrode comprising the steps of:(a) utilizing an electrode structure including a substrate coated with active material;(b) utilizing a lithium coated plastic sheet;(c) pressing the said electrode material and said lithium coated sheet together using a pair of pressing structures;(d) moving said electrode structure and lithium coated sheet through the pressing structures; and(e) applying pressure and heat in vacuum to said electrode structure and said lithium coated sheet while moving them through said pressing structures. 2. The method of claim 1 further comprising the step of utilizing the said laminated electrode in lithium or lithium ion batteries. 3. The method of claim 1 further comprising the step of utilizing a pair of rollers as the pressing structures. 4. The method of claim 1 further comprising the step of utilizing a pair of plates as the pressing structures. 5. The method of claim 1 further comprising the step of applying heat at a temperature within the range 25° C. to 250° C. 6. The method of claim 1 further comprising the step of applying pressure in the range of 50 kg/cm 2 to 600 kg/cm 2 utilizing said pressure structures. 7. A method for increasing the storage capacity of a lithium ion battery including the steps of:(a) providing an electrode structure comprised of a metal substrate coated with active material; and(b) depositing lithium onto or into said active material to reduce cavities therein; wherein said depositing step includes:(b1) providing a sheet carrier bearing a layer of lithium metal; and(b2) pressing said layer of lithium metal against said active material to transfer lithium onto or into said active material. 8. The method of claim 7 wherein said depositing step further includes:(a) applying heat and/or pressure in vacuum to said carrier and/or said electrode structure to facilitate transfer of said lithium.