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Nonaqueous lithium storage element

A technology for electric storage components and non-aqueous electrolytes, which is applied to electrical components, non-aqueous electrolyte batteries, lithium batteries, etc., and can solve problems such as unconsidered suppression, resistance rise, and energy density reduction

Active Publication Date: 2018-08-31
ASAHI KASEI KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0016] However, these methods have the following problems: the addition of a lithium compound leads to the suppression of electron conduction between active material particles, resulting in an increase in resistance and a decrease in energy density, so there is room for further improvement in terms of higher output and higher energy density
However, the electrode of Patent Document 5 does not consider at all the suppression of the resistance increase under high-load charge-discharge cycles in the positive electrode containing the lithium compound, and the suppression of gas generation caused by the decomposition of the lithium compound at high voltage.

Method used

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preparation example Construction

[0270] The preparation of the above-mentioned coating solution for the positive electrode precursor is not particularly limited, and a disperser such as a homogeneous disperser, a multi-shaft disperser, a planetary mixer, a thin film rotary high-speed mixer, etc. can be suitably used. In order to obtain a coating liquid in a good dispersion state, it is preferable to disperse at a peripheral speed of 1 m / s to 50 m / s. When the peripheral speed is 1 m / s or more, various materials can be dissolved or dispersed well, which is preferable. In addition, when the peripheral speed is 50 m / s or less, various materials are not broken by heat or shear force generated by dispersion, and re-agglomeration does not occur, so it is preferable.

[0271] Regarding the degree of dispersion of the coating liquid, the particle size measured by a particle size meter is preferably 0.1 μm or more and 100 μm or less. As the upper limit of the degree of dispersion, the particle size is more preferably ...

Embodiment 1

[0553]

preparation example 1a

[0555] The crushed coconut shell carbides were carbonized in a small carbonization furnace at 500°C for 3 hours in nitrogen to obtain carbides. Put the obtained carbide into the activation furnace, introduce 1 kg / h of water vapor into the activation furnace in the state of being heated by the preheating furnace, and heat up to 900° C. for 8 hours for activation. The activated carbide was taken out and cooled under a nitrogen atmosphere to obtain activated activated carbon. The obtained activated carbon was washed with water for 12 hours, and then water was removed. Thereafter, it was dried in an electric dryer maintained at 125°C for 10 hours, and then pulverized by a ball mill for 1 hour to obtain activated carbon 1a.

[0556] The average particle diameter of this activated carbon 1a was 12.7 μm when measured using a laser diffraction particle size distribution analyzer (SALD-2000J) manufactured by Shimadzu Corporation. In addition, the pore distribution was measured using ...

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Abstract

A nonaqueous lithium storage element in which a nonporous positive electrode collector and a nonporous negative electrode collector are used, said storage element: having high output and high energy density without lowering electron conductivity in a positive electrode containing a lithium compound; having exceptional high-load charge and discharge cycle characteristics; adjusting the change in potential of a positive electrode active material layer coated on both surfaces of the nonporous positive electrode collector; and minimizing gas generated due to excess decomposition of the lithium compound remaining in the positive electrode under high temperature, high voltage conditions, wherein it is possible to suppress a rise in resistance by mitigating any uneven distribution of ions in an electrolytic solution in the high-load charge and discharge cycle, and suppress decomposition of the lithium compound in the positive electrode under high voltage conditions to inhibit gas generation,the expression 0.1 [mu]m <= X1 <= 10.0 [mu]m being satisfied, where X1 is the average particle diameter of the lithium compound in the storage element, and the expressions 2.0 [mu]m <= Y1 <= 20.0 [mu]m, and X1 < Y1 being satisfied, where Y1 is the average particle diameter of the positive electrode active material.

Description

technical field [0001] The invention relates to a non-aqueous lithium storage element. Background technique [0002] In recent years, from the perspective of protecting the global environment and saving resources and effectively using energy, wind power generation power stabilization systems or late-night power storage systems, household distributed power storage systems based on photovoltaic power generation technology, and electric vehicles Power storage systems and the like are attracting attention. [0003] The first requirement for batteries used in these power storage systems is high energy density. As a powerful supplement to high-energy-density batteries that can meet such demands, development of lithium-ion batteries has been actively promoted. [0004] The second requirement is high output characteristics. For example, in a combination of a high-efficiency engine and a power storage system (such as a hybrid electric vehicle), or a combination of a fuel cell and ...

Claims

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Application Information

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IPC IPC(8): H01G11/06H01G11/24H01G11/26H01G11/50H01G11/70H01M4/1393H01M10/052H01M10/0567H01M10/0585
CPCH01G11/06H01G11/24H01G11/26H01G11/50H01G11/70H01M4/1393H01M10/0525H01M10/0566H01M10/058H01M10/052H01M10/0567H01M10/0585H01G11/34Y02T10/70Y02P70/50H01M4/133H01M4/62H01M10/446Y02E60/13H01G11/84H01G11/78H01M4/364
Inventor 梅津和照冈田宣宏上城武司
Owner ASAHI KASEI KK