Aqueous lithium ion secondary battery
A secondary battery, lithium ion technology, used in secondary batteries, battery electrodes, aqueous electrolytes, etc., to ensure the effect of cycle stability
Inactive Publication Date: 2019-03-22
TOYOTA JIDOSHA KK
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Problems solved by technology
[0002] With regard to aqueous electrolyte solutions for lithium-ion batteries, it has been known that there is a limit to the electrochemically stable potential region (potential window)
Method used
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Embodiment 1
[0157] (Example 1, Comparative Examples 1-2)
[0158] 2. Charge and discharge evaluation
[0159] 2.1. Preparation of aqueous electrolyte
[0160] Prepare an aqueous electrolyte solution in the same manner as in 1.1 above.
[0162] As far as the active material is concerned, the Li 4 Ti 5 o 12 (LTO) for the working electrode (negative electrode), the LiMn 2 o 4 (LMO) for the counter electrode (positive electrode).
[0163] Acetylene black (HS-100, manufactured by Hitachi Chemical Co., Ltd.) was used as the conductive auxiliary agent, and PVdF (#9305, manufactured by Cureha Corporation) was used as the binder.
[0164] As the negative electrode current collector, the carbon-coated Al foil prepared in the above [Preparation of the carbon-coated current collector] was used in Example 1, the Al foil was used in Comparative Example 1, and the SUS316L foil was used in Comparative Example 2.
[0165] As the positive electrode current collector...
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Abstract
The invention relates to an aqueous lithium ion secondary battery. Provided is an aqueous lithium ion secondary battery configured to ensure cycle stability. The aqueous lithium ion secondary batteryis characterized by comprising: an aqueous liquid electrolyte comprising water and an electrolyte, an anode active material layer comprising an anode active material, and an anode current collector, wherein a charge potential of the anode active material calculated from a current value of a reduction peak observed by cyclic voltammetry measurement using the anode active material and the aqueous liquid electrolyte, is a more noble potential than a reduction decomposition potential of the aqueous liquid electrolyte on carbon, and it is a more base potential than the reduction decomposition potential of the aqueous liquid electrolyte on the anode current collector, and wherein the anode current collector comprises a carbon coating layer on a surface thereof.
Description
technical field [0001] The present disclosure relates to an aqueous lithium ion secondary battery. Background technique [0002] With regard to aqueous electrolyte solutions for lithium ion batteries, it has been known that there is a limit in the range of an electrochemically stable potential region (potential window). [0003] As one of means for solving the above-mentioned problems that the aqueous electrolytic solution has, Non-Patent Document 1 discloses a hydrate melt (Hidelet melt) obtained by mixing specific two kinds of lithium salts and water in a predetermined ratio. High-concentration aqueous electrolyte. In Non-Patent Document 1, by using such a high-concentration aqueous electrolyte, Li, which is difficult to use as a negative electrode active material in conventional aqueous lithium-ion batteries, is 4 Ti 5 o 12 (hereinafter sometimes referred to as "LTO") was used as a negative electrode active material, and charge and discharge of an aqueous lithium ion ...
Claims
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IPC IPC(8): H01M10/36H01M4/66
CPCH01M4/661H01M4/663H01M4/667H01M10/36H01M2004/027H01M2300/0002H01M4/485Y02E60/10
Inventor 陶山博司
Owner TOYOTA JIDOSHA KK