Bipolar electrode pair/separation membrane assembly, bipolar battery including same, and production method thereof
A bipolar electrode and bipolar battery technology, which is applied in the direction of electrode manufacturing, secondary battery manufacturing, electrode carrier/collector, etc., can solve the problems of reducing energy storage density and space waste, and achieve high energy density and effective sealing effect
Active Publication Date: 2012-09-12
LG ENERGY SOLUTION LTD
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Problems solved by technology
For this reason, if the separator plate has a greater thickness than the metal foil used as the collector, a significant waste of space occurs, rapidly reducing the energy storage density
Method used
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[0075] On one side of the aluminum foil serving as the collector electrode 111, a slurry for the positive electrode 113a containing lithium manganese oxide (LMO) as a positive electrode active material for the positive electrode 113a, carbon as a conductive agent is applied. black and PVDF as a binder, and on the other side of the aluminum foil is applied a slurry for the negative electrode 113b, the slurry lithium titanium oxide (LTO), carbon black as a conductive agent, PVDF. Thereafter, the resulting structure was dried with hot air at a temperature of 150° C. for two minutes.
[0076] Subsequently, a modified PE polymer is applied as an adhesive film 121 to both the top and bottom surfaces of the two opposite sides of the four electrodes-uncoated edge surfaces of the collector electrode 111, so as to be compatible with the electrodes of the electrode layers 113a and 113b. The edges are spaced apart a predetermined distance.
[0077] Thereafter, a porous non-woven fabric ...
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Abstract
The present invention relates to a bipolar electrode pair / separation membrane assembly comprising: a bipolar electrode pair-adhesive film assembly which includes a bipolar electrode pair for forming an electrode layer that contains active materials which may have different polarities in the central part of both upper and lower sides of a current collector plate, and an adhesive film formed on one side or upper and lower sides of four sides of an uncoated current collector plate that does not include the electrode layer in the bipolar electrode pair, relative to at least two or more sides; and a separation membrane which is laminated on one side or both upper and lower sides of the bipolar electrode pair-adhesive film assembly. Further, the invention provides a bipolar electrode pair / separation membrane assembly, a bipolar battery including the bipolar electrode pair / separation membrane assembly, and a production method thereof wherein the current collector plate and the separation membrane are directly bonded by the adhesive film, thereby sealing the bipolar electrode pair. According to the present invention, since the bipolar electrode pair and the separation membrane assembly are electrically connected according to the usage purpose, it is possible to provide the battery with desirable capacity and desirable voltages.
Description
[0001] Cross References to Related Applications [0002] This patent application claims the benefit of Korean Patent Application No. 10-2009-0111345 filed on November 18, 2009 and Korean Patent Application No. 10-2010-0114601 filed on November 17, 2010, the entire contents of which are incorporated by reference incorporated into this article. technical field [0003] The present invention relates to bipolar electrode / separator assemblies, bipolar batteries including the same, and methods of making the same. [0004] The present invention is characterized in that, in order to achieve high energy density, a thin metal foil type collector is used instead of inserting a separator separately, and an adhesive film is provided to four uncoated electrodes of a collector on which no electrode layer exists. at least two of the edge surfaces of the cloth to prevent leakage of the electrolyte, and then stack the separator thereon so that the collector and the separator are directly bonde...
Claims
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IPC IPC(8): H01M10/38H01M4/64C09J7/00H01M4/04H01M10/05
CPCH01M10/0418H01M10/052H01M10/0585H01M2300/0085Y10T156/10Y10T156/1052Y02E60/10Y02P70/50H01M10/0565
Inventor 郑根昌尹逢国
Owner LG ENERGY SOLUTION LTD