Non-aqueous electrolyte secondary battery

A non-aqueous electrolyte, secondary battery technology, used in non-aqueous electrolyte batteries, secondary batteries, battery electrodes, etc. Effect

Active Publication Date: 2006-12-13
MAXELL HLDG LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, with the increase in battery voltage, while the capacity and energy density of the battery have increased, the safety and charge-discharge cycle characteristics of the battery have declined, and problems such as swelling have occurred during high-temperature storage.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0080] Fabricate the electrodes and prepare the non-aqueous electrolyte as follows, making and figure 1 and figure 2 A non-aqueous electrolyte secondary battery of the same configuration as shown.

[0081]

[0082] The positive electrode was fabricated as described below. First, in Li as a layered lithium-manganese composite oxide 1.02 Ni 1 / 3 mn 1 / 3 co 1 / 3 o 2 (Positive electrode active material) In 94 mass parts, mix the carbon black of 3 mass parts as conductive auxiliary agent, add the solution that 3 mass parts of polyvinylidene fluoride is dissolved in NMP to this mixture, mix and make the slurry containing positive electrode mixture , so that it passes through a 70-mesh sieve to remove the part with large particle size. The slurry containing the positive electrode mixture is evenly coated on both sides of the positive electrode collector formed by aluminum foil with a thickness of 15 μm, and after drying, it is compressed and molded by a roller extruder. After ...

Embodiment 2～6

[0091] Instead of 1,2-propanediol sulfate, ethylene glycol sulfate (Example 2), 1,3-Propanediol sulfate (Example 3), 1 , 3-propane sultone (Example 4), 1,2-Propane sultone (Example 5), 1,4-Butane sultone (Example 6), in addition, with Example 1 was operated in the same manner to prepare a non-aqueous electrolyte. Except having used these nonaqueous electrolyte solutions, it carried out similarly to Example 1, and produced the nonaqueous electrolyte solution secondary battery.

Embodiment 7～13

[0093] A nonaqueous electrolytic solution was prepared in the same manner as in Example 1, except that the amount of 1,3-propane sultone added to the total mass of the nonaqueous electrolytic solution was changed as shown in Table 3. Except having used these nonaqueous electrolyte solutions, it carried out similarly to Example 1, and produced the nonaqueous electrolyte solution secondary battery.

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Abstract

A non-aqueous secondary battery contains a positive electrode, a negative electrode, a separator and a non-aqueous electrolytic solution. The positive electrode contains a layered structure lithium-containing compound oxide, or a spinel lithium-containing compound oxide containing manganese as an active material. The non-aqueous electrolytic solution contains at least one additive selected from a sulfonic acid anhydride, a sulfonate ester derivative, a cyclic sulfate derivative and a cyclic sulfonate ester derivative, and a vinylene carbonate or a derivative of the vinylene carbonate.

Description

technical field [0001] The present invention relates to a secondary battery having a nonaqueous electrolytic solution having high voltage, high capacity, and excellent charge-discharge cycle characteristics. Background technique [0002] Lithium-ion secondary batteries are widely used in the field of portable information devices due to their characteristics of high voltage (operating voltage: 4.2V) and high energy density, and their demand is rapidly expanding. At present, it has established its position as a standard battery for mobile information equipment such as mobile phones and notebook computers. Of course, along with the improvement in performance and multi-function of portable devices and the like, further improvement in performance (for example, higher capacity and higher energy density) is also required for lithium ion secondary batteries as their power sources. In order to meet this demand, various methods have been studied, such as increasing the density of ele...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/40H01M4/48H01M4/58H01M4/02H01M4/36H01M4/38H01M4/505H01M4/525H01M4/587H01M10/05H01M10/052H01M10/0525H01M10/0567
CPCH01M10/052H01M10/0567H01M4/505Y02E60/122Y02E60/10
Inventor 赵金保儿岛映理
Owner MAXELL HLDG LTD
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