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Non-aqueous lithium type storage element

A storage element, non-aqueous technology, applied in the field of non-aqueous lithium-type storage elements, can solve problems such as difficulty in obtaining input-output characteristics and high-load charge-discharge cycle characteristics

Active Publication Date: 2019-07-09
ASAHI KASEI KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0022] However, in Patent Document 6, there is no description about the pore volume, specific surface area, and their distribution in the negative electrode active material layer.
According to the research of the present inventors, it is difficult to obtain sufficient input-output characteristics and high Load charge and discharge cycle characteristics

Method used

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  • Non-aqueous lithium type storage element
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  • Non-aqueous lithium type storage element

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0537]

[0538] [Assembly and drying of electric storage element]

[0539] The resulting double-sided negative electrode 1 and double-sided positive electrode precursor (composition a) were cut into 10cm × 10cm (100cm 2 ). The uppermost and the lowermost use single-sided positive electrode precursors (composition a), further use 21 sheets of double-sided negative electrodes 1 and 20 sheets of double-sided positive electrode precursors (composition a), and sandwich a thickness of 15 μm between the negative and positive electrode precursors Microporous membrane separator and laminated. After that, the negative electrode terminal and the positive electrode terminal were respectively connected to the negative electrode and positive electrode precursors by ultrasonic welding to make an electrode laminate. The electrode laminate was vacuum-dried under conditions of a temperature of 80° C., a pressure of 50 Pa, and a drying time of 60 hr. The dried electrode laminate was housed ...

Embodiment 2～28 and comparative example 1～5

[0580] The positive electrode active material of the positive electrode precursor, the type of lithium compound and its average particle size, composition, negative electrode, and the voltage and time of the lithium doping process are shown in Table 1, except that, in the same manner as in Example 1, respectively The nonaqueous lithium-type electrical storage elements of Examples 2 to 28 and Comparative Examples 1 to 5 were prepared and variously evaluated. Table 1 shows the evaluation results of the obtained non-aqueous lithium-type electricity storage elements.

Embodiment 29

[0595]

[0596] [Assembly and drying of electric storage element]

[0597] The double-sided negative electrode 1 obtained above, the double-sided positive electrode precursor (composition a) and the single-sided positive electrode precursor (composition a) were cut into 10cm × 10cm (100cm 2 ). The uppermost and the lowermost use single-sided positive electrode precursors (composition a), further use 21 sheets of double-sided negative electrodes 1 and 20 sheets of double-sided positive electrode precursors (composition a), and sandwich a thickness of 15 μm between the negative and positive electrode precursors Microporous membrane separator and laminated. The negative electrode terminal and the positive electrode terminal were respectively connected to the negative electrode and positive electrode precursors by ultrasonic welding to obtain an electrode laminate. The electrode laminate was vacuum-dried under conditions of a temperature of 80° C., a pressure of 50 Pa, and a d...

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Abstract

The non-aqueous lithium-type storage element includes a positive electrode, a negative electrode, a separator, and a non-aqueous electrolyte solution containing lithium ions. The positive electrode has a positive electrode collector and a positive electrode active material layer arranged on one or both sides of the positive electrode collector. The positive electrode The active material layer contains a positive electrode active material containing a carbon material, the negative electrode has a negative electrode current collector and a negative electrode active material layer arranged on one or both sides of the negative electrode current collector, and the negative electrode active material layer contains a negative electrode capable of absorbing and releasing lithium ions The active material has a Log differential pore volume of 1.0 mL / g or more in the pore distribution curve representing the relationship between the pore diameter and the Log differential pore volume when the pore distribution of the positive electrode active material layer is measured by mercury intrusion porosimetry One or more peaks with a peak of 5.0 mL / g or less exist in the range of pore diameters from 0.1 μm to 50 μm, and the total cumulative pore volume Vp in the range of pore diameters from 0.1 μm to 50 μm is 0.7 mL / g to 3.0 mL / g or less.

Description

technical field [0001] The present invention relates to a nonaqueous lithium type electric 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 combinatio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G11/24H01G11/06H01G11/46H01M4/1393H01M10/052H01M10/0567H01M10/0585
CPCH01G11/24H01G11/46H01M4/1393H01M10/052H01M10/0567H01M10/0585H01G11/34H01G11/50H01G11/60H01G11/62H01G11/06Y02T10/70Y02E60/10Y02P70/50H01M4/133H01M4/62H01M2220/10H01M2004/021Y02E60/13H01M10/0525H01M10/4242
Inventor 楠坂启太梅津和照冈田宣宏上城武司细木原睦士松下忠史
Owner ASAHI KASEI KK