KR-102961853-B1 - Applications of perforated electrodes in silicon-rich anode cells

Abstract

A method and system for the use of a perforated electrode in a silicon-rich anode battery may comprise a cathode, an electrolyte, and an anode, and each of the cathode and the anode comprises an active material on a current collector. One or both of the current collector and the active material may be perforated. For example, the current collector may be perforated and/or both the current collector and the active material may be perforated. The battery may comprise a stack of anodes and cathodes. Each cathode of the stack may be perforated and/or each anode of the stack may be perforated. The battery may comprise a stack of anodes and cathodes. Each cathode of the stack may be perforated and/or each anode of the stack may be perforated. Each cathode of the stack may comprise two layers of active material on each side of the cathode, and the first layer of the two layers of active material may be for the pre-lithiation of the anode of the battery. Of the two layers, the second layer may be for the lithium circulation of the battery.

Inventors

• 안사리 유네스
• 나이어 엠비카
• 박 벤자민

Assignees

• 에네베이트 코포레이션

Dates

Publication Date

20260507

Application Date

20201029

Priority Date

20191107

Claims (20)

1. As a battery, It comprises a cathode, an electrolyte, and a silicon-rich anode, but, The above anode comprises an active material on a current collector, and the above cathode comprises a first and a second current collector, and The collector of the anode and/or the first and second collectors of the cathode are perforated, The above cathode includes a first type active material on the first surface of the first and second collectors and a second type active material on the second surface of the first and second collectors, and The active materials of the first and second types above include lithium cobalt oxide, lithium iron phosphate, lithium nickel cobalt manganese oxide, lithium nickel cobalt aluminum oxide, lithium manganese oxide, lithium nickel manganese spinel, or a combination thereof, and The first type of active material is for the pre-lithiation of the silicon-rich anode of the battery, and the second type of active material is for the lithium cycling of the battery, and The battery comprises a stack of an anode and a cathode, wherein the outer surface of the outermost cathode of the stack comprises the first type of active material.
2. delete
3. A battery according to claim 1, wherein both the current collector and the active material are perforated.
4. delete
5. A battery according to claim 1, wherein each cathode of the stack is perforated.
6. A battery according to claim 1, wherein each anode of the stack is perforated.
7. delete
8. A battery according to claim 1, wherein each cathode of the stack comprises a first type active material on a first surface of the cathode and a second type active material on a second surface of the cathode.
9. delete
10. A battery according to claim 1, wherein each cathode comprises two collectors, and each collector has a first type of active material on a first surface of the collector and a second type of active material on a second surface of the collector.
11. delete
12. A battery according to claim 1, wherein each cathode of the stack comprises two layers of active material on each side of the cathode.
13. A battery according to claim 10, wherein the first layer of the two layers of the active material on each side of the cathode is for the pre-lithiation of the silicon-rich anode of the battery and the second layer of the two layers on each side of the cathode is for the lithium cycling of the silicon-rich anode of the battery.
14. A battery according to claim 1, wherein the active material of the anode comprises 50 weight% or more of silicon.
15. A battery according to claim 1, wherein the battery formation process is performed at a charging rate of less than 1C.
16. As a method of forming a battery, The step of forming a battery comprising a cathode, an electrolyte, and a silicon-rich anode, wherein The above anode comprises an active material on a current collector, and the above cathode comprises a first and a second current collector, and The collector of the anode and/or the first and second collectors of the cathode are perforated, The above cathode includes a first type active material on the first surface of the first and second collectors and a second type active material on the second surface of the first and second collectors, and The active materials of the first and second types above include lithium cobalt oxide, lithium iron phosphate, lithium nickel cobalt manganese oxide, lithium nickel cobalt aluminum oxide, lithium manganese oxide, lithium nickel manganese spinel, or a combination thereof, and The first type of active material is for the pre-lithiation of the silicon-rich anode of the battery, and the second type of active material is for the lithium cycling of the battery, and The above battery includes a stack of an anode and a cathode, and A method for forming a battery in which the outer surface of the outermost cathode of the stack comprises the first type of active material.
17. delete
18. A method for forming a battery in which both the current collector and the active material are perforated, in paragraph 16.
19. delete
20. A method for forming a battery in which each cathode of the stack is perforated, in paragraph 16.

Description

Applications of perforated electrodes in silicon-rich anode cells Cross-reference/citation by reference to related applications The application mentioned above claims priority to U.S. Patent Application No. 16/676,813 (filed November 7, 2020). field Aspects of the present disclosure relate to energy generation and storage. More specifically, specific embodiments of the present disclosure relate to methods and systems for the use of perforated electrodes in silicon-dominant anode cells. Conventional methods for battery electrodes can be costly, cumbersome, or inefficient—for example, they can be complex, time-consuming to implement, or limit battery life. Further limitations and disadvantages of conventional and traditional methods will become apparent to those skilled in the art through a comparison of some aspects of the present disclosure and such systems, as presented in the remainder of this application with reference to the drawings. A system and/or method for the use of a perforated electrode in a silicon-rich anode cell is illustrated and/or described in substantial connection with at least one of the drawings, as more fully presented in the claims. This and other advantages, aspects and novel features of the present disclosure, as well as details of the exemplified embodiments of the present disclosure, will be more fully understood from the following description and drawings. FIG. 1 is a drawing of a battery having perforated electrodes according to an exemplary embodiment of the present disclosure. FIG. 2 is a drawing illustrating an anode during lithiation according to an exemplary embodiment of the present disclosure. FIG. 3 is a plan view and a side view of a battery according to an exemplary embodiment of the present disclosure. FIG. 4 is a flowchart of a process for manufacturing a battery according to an exemplary embodiment of the present disclosure. FIG. 5 is a flowchart of an alternative process for manufacturing a battery according to an exemplary embodiment of the present disclosure. FIG. 6 is a drawing illustrating a cathode perforated during anode lithiation according to an exemplary embodiment of the present disclosure. FIGS. 7a and 7b are drawings illustrating two embodiments of a multilayer cathode according to an exemplary embodiment of the present disclosure. FIG. 8 is a drawing illustrating the cell capacitance for a standard electrode and a perforated electrode according to an exemplary embodiment of the present disclosure. FIG. 9 is a drawing illustrating the cycle life for a standard electrode and a perforated electrode according to an exemplary embodiment of the present disclosure. FIG. 1 is a drawing of a battery having perforated electrodes according to an exemplary embodiment of the present disclosure. Referring to FIG. 1, a battery (100) is shown comprising a separator (103) interposed between an anode (101) and a cathode (105), together with a collector (107A and 107B). For clarity, the perforations are not shown in FIG. 1 but are shown in FIG. 6 through 9. A load (109) coupled to the battery (100) is also shown, illustrating the case when the battery (100) is in a discharge mode. In the present disclosure, the term “battery” may be used to refer to a single electrochemical cell, a plurality of electrochemical cells formed as modules, and/or a plurality of modules formed as packs. The development of portable electronic devices and the evolution of transportation have created a need for high-performance electrochemical energy storage. Small-scale (less than 100Wh) to large-scale (over 10kWh) devices primarily utilize lithium-ion (Li-ion) batteries compared to other rechargeable battery chemistry due to their high performance. Together with the current collectors (107A and 107B), the anode (101) and cathode (105) may comprise electrodes that may be in or contain an electrolyte material, and the plate may provide a conductive contact to an external structure as well as a physical barrier for containing the electrolyte. In another embodiment, the anode/cathode plate is immersed in the electrolyte, while the outer casing provides electrolyte containment. The anode (101) and cathode are electrically coupled to current collectors (107A and 107B) that include a metal or other conductive material to provide electrical contact to the electrodes as well as physical support for the active material when forming the electrodes. The configuration illustrated in FIG. 1 illustrates a battery (100) in a discharge mode, whereas in a charging configuration, the load (109) may be replaced by a charger to reverse the process. In one class of batteries, the separator (103) is generally a membrane material made of an electrically insulating polymer that is sufficiently porous to allow ions to pass through the separator (103) and, for example, prevents electrons from flowing from the anode (101) to the cathode (105) or vice versa. Generally, the separator (103), cathode (105), and anode (101) m