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Nonaqueous electrolyte secondary battery

A non-aqueous electrolyte, secondary battery technology, applied in non-aqueous electrolyte batteries, secondary batteries, lithium batteries, etc., can solve the problem of unstable charging and discharging characteristics

Pending Publication Date: 2019-09-24
SEIKO INSTR INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At this time, if the size of the battery is increased in the thickness direction and the electrodes and the electrolyte are accommodated therein, there is a problem that the charge-discharge characteristics become unstable due to the deposition of metallic lithium during charging.

Method used

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Examples

Experimental program
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Embodiment

[0066] Prototype figure 1 The non-aqueous electrolyte secondary batteries having the configuration shown above were subjected to evaluation tests described later.

[0067] As the positive electrode 10, first, commercially available lithium manganese oxide (Li 1.14 co 0.06 mn 1.80 o 4 ), mix graphite as a conductive additive, polyacrylic acid as a binder, and lithium manganese oxide: graphite: polyacrylic acid = 90:8:2 (mass ratio) to make a positive electrode mixture. 13 mg of the positive electrode mixture was used at 2 tons / cm 2 The pressurized pressure is pressurized, and the disc-shaped particles with a diameter of 4 mm and a thickness of 1 mm are formed under pressure.

[0068] The obtained pellets (positive electrode) were bonded to the inner surface of a stainless steel (SUS316L: t=0.20 mm) positive electrode can with an outer diameter of 4.8 mm using a conductive resin binder containing carbon, and these were integrated to obtain a positive electrode unit. Therea...

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Abstract

The present invention addresses the problem of providing a nonaqueous electrolyte secondary battery in which more electrodes are housed inside a small battery, and in which charge / discharge characteristics are stabilized. This nonaqueous electrolyte secondary battery is a nonaqueous electrolyte secondary battery in which a positive electrode and a negative electrode are disposed facing each other with a separator interposed therebetween, and which is housed in a housing container, and is characterized in that the negative electrode is composed of an alloy containing lithium and aluminum, and a gap having a prescribed width is provided between the negative electrode and the separator.

Description

technical field [0001] The present invention relates to a nonaqueous electrolyte secondary battery. Background technique [0002] A coin-type non-aqueous electrolyte secondary battery using a lithium-aluminum alloy as a negative electrode is suitable because of its high energy density and capacity increase. In this non-aqueous electrolyte secondary battery, the negative electrode can be obtained by, for example, bonding lithium to a negative electrode can made of a cladding material of aluminum and stainless steel, and alloying it with aluminum (for example, refer to the following patent documents 1). [0003] In addition, a non-aqueous electrolyte secondary battery suitable for reflow mounting can be provided by combining with components such as a heat-resistant electrolyte solution, a separator, and a gasket (for example, refer to Patent Document 2 below). [0004] prior art literature [0005] patent documents [0006] Patent Document 1: Japanese Patent Laying-Open No...

Claims

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Application Information

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IPC IPC(8): H01M10/0585H01M10/052H01M4/40H01M4/134H01M2/08H01M2/02
CPCH01M10/0585H01M10/052H01M4/405H01M4/134H01M50/109H01M50/183Y02P70/50Y02E60/10H01M50/166H01M50/46H01M50/102
Inventor 三浦研
Owner SEIKO INSTR INC
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