Nonaqueous-electrolyte battery

一种非水电解液、电池的技术，应用在非水电解质、电池电极、二次电池等方向，能够解决电池大电流特性、自放电特性电池特性劣化等问题，达到良好电池特性、提高安全性的效果

Inactive Publication Date: 2009-02-25
KK TOSHIBA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, it has been found that for such a battery using a material with a high lithium intercalation and deintercalation potential, such as a lithium-titanium composite oxide, as the negative electrode active material, a reaction accompanied by gas generation may occur in the battery due to a battery reaction or long-term storage.
In addition, due to this reaction, battery characteristics such as large current characteristics and self-discharge characteristics of the battery will also deteriorate.

Method used

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Examples

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Embodiment 1

[0138]

[0139] First, lithium manganese oxide (LiMn 2 o 4 ) powder 90% by weight, 3% by weight of acetylene black as a conductive agent, 3% by weight of graphite, and 4% by weight of polyvinylidene fluoride (PVdF) are added to N-methylpyrrolidone (NMP) and mixed to make a slurry, This slurry was coated on both sides of a current collector made of aluminum foil with a thickness of 15 μm, dried, and punched to produce an electrode with a density of 3.0 g / cm 3 positive pole.

[0140]

[0141] As the negative electrode active material, prepared a 2 / g, Li intercalation potential is 1.55V (vs.Li / Li + ) spinel lithium titanate (Li 4 Ti 5 o 12 )powder. The particle size measurement of negative electrode active material is to use laser diffraction type distribution measuring device (Shimadzu SALD-300), utilize following method to measure, that is, at first, add about 0.1g sample, surfactant and 1~ After fully stirring 2 mL of distilled water, pour it into the stirring wat...

Embodiment 5、13

[0152] A nonaqueous electrolyte secondary battery was fabricated in the same manner as in Examples 4 and 10 except that 1,4-diisocyanate butane was added instead of 1,6-diisocyanate hexane as the nonaqueous electrolyte solution.

Embodiment 14～18

[0154] In addition to adding 1-isocyanate ethane, 2-isocyanate propane, 1-isocyanate hexane, 1-isocyanate butane, and 3-isocyanate-1-propane instead of 1,6-diisocyanate hexane as a non-aqueous electrolyte, A nonaqueous electrolyte secondary battery was produced in the same manner as in Example 10.

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Abstract

The invention provides a nonaqueous-electrolyte battery which produces few gas and has good battery characteristic. The nonaqueous-electrolyte battery has a positive electrode 3 including a positive active material, a negative electrode 4 including a negative active material having a lithium insertion / release potential higher than 1.0 V (vs. Li / Li+), and a nonaqueous electrolyte, wherein an organic compound having one or more isocyanato groups has been added to the nonaqueous electrolyte.

Description

technical field [0001] The invention relates to a nonaqueous electrolyte battery. Background technique [0002] A non-aqueous electrolyte battery that performs charge and discharge by moving lithium ions between the negative electrode and the positive electrode is being actively researched and developed as a high energy density battery. A non-aqueous electrolyte battery using a lithium transition metal composite oxide as a positive electrode active material and a carbon material as a negative electrode active material has been commercialized. [0003] On the other hand, in recent years, compared with carbon materials, lithium intercalation and deintercalation potentials, such as lithium-titanium composite oxides (approximately 1.55 V vs Li / Li + ) a nonaqueous electrolyte battery used as a negative electrode active material (see Patent Documents 1 and 2). Lithium-titanium composite oxides have excellent cycle characteristics because of little volume change accompanying char...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/40H01M4/02H01M4/48H01M4/58H01M2/16H01M4/36H01M4/485H01M4/505H01M4/525H01M10/0525H01M10/0567H01M10/0569
CPCH01M4/525H01M10/0567H01M10/0569H01M4/485H01M10/0568H01M10/0525H01M2300/0025Y02E60/122H01M10/056Y02E60/10
Inventor 稻垣浩贵高见则雄
Owner KK TOSHIBA
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