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Method for manufacturing lithium-contained composite oxide and nonaqueous secondary cell

A composite oxide and manufacturing method technology, applied in secondary batteries, non-aqueous electrolyte storage batteries, lithium storage batteries, etc., can solve problems such as cleaning effect limits, and achieve inhibition of decomposition and gas generation, storage characteristics, and charge-discharge cycle characteristics. excellent effect

Inactive Publication Date: 2010-05-12
PANASONIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these ketones are solvents that are difficult to dissolve lithium hydroxide and lithium carbonate, so when used alone in cleaning lithium-containing composite oxides, the cleaning effect is limited.

Method used

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  • Method for manufacturing lithium-contained composite oxide and nonaqueous secondary cell
  • Method for manufacturing lithium-contained composite oxide and nonaqueous secondary cell
  • Method for manufacturing lithium-contained composite oxide and nonaqueous secondary cell

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0156] (1) Manufacture of lithium-containing composite oxides

[0157] Cobalt sulfate and aluminum sulfate were added to the nickel sulfate aqueous solution to prepare a saturated aqueous solution. The content ratio of nickel, cobalt and aluminum in this saturated aqueous solution was adjusted so that the molar ratio of each element became 80:15:5. Next, it is neutralized by adding sodium hydroxide to a saturated aqueous solution to produce a ternary hydroxide Ni 0.80 co 0.15 Al 0.05 (OH) 2 precipitation. The obtained precipitate was filtered, washed with water, and then dried at 80°C.

[0158] Next, the ternary system hydroxide was heated at 600°C for 10 hours in the air to obtain the ternary system oxide Ni 0.80 co 0.15 Al 0.05 O. Then, lithium hydroxide monohydrate was added to the ternary oxide, and fired at 800° C. for 10 hours in an oxygen stream to obtain a lithium-containing composite oxide (LiNi 0.80 co 0.15 Al 0.05 o 2 ). Lithium hydroxide and lithium c...

Embodiment 2～13

[0176] In addition to using 1000 mL of N-methylformamide (Example 2), N-methylacetamide (Example 3), N-methylpropionamide (Example 4), N,N- Dimethylformamide (Example 5), N-cyclohexylpyrrolidone (Example 6), N, N'-dimethylimidazolinone (DMI, Example 7), N, N'-dimethylene Propylurea (Example 8), Dimethylsulfoxide (DMSO, Example 9), Sulfolane (Example 10), Acetonitrile (Example 11), Propylene Carbonate (Example 12) or Dioxane Except for hexane (Example 13), a lithium-containing composite oxide and a non-aqueous secondary battery were produced in the same manner as in Example 1.

Embodiment 14

[0182] 100g of the composition formula LiNi 0.80 co 0.15 Al 0.05 o 2 The indicated lithium-containing composite oxide powder and 1000 mL of NMP were placed in a stirrer and stirred for 1 hour. After stirring, the cleaning solution was removed by filtration, and the content of the solid content was adjusted to be 95% by weight or more. Then, the lithium-containing composite oxide from which the cleaning solution was removed, 6 g of PVDF powder (manufactured by Kureha Chemical Co., Ltd.), 40 g of acetylene black, and an appropriate amount of NMP were charged into a double-arm mixer, and heated at 30° C. Stirring at the processing temperature for 30 minutes was prepared into positive electrode mixture slurry. A non-aqueous secondary battery was produced in the same manner as in Example 1 except that the positive electrode mixture slurry thus obtained was used.

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Abstract

The invention provides a method for manufacturing lithium-contained composite oxide represented by a general formula (I) and a nonaqueous secondary cell taking the lithium-contained composite oxide as an anode active substance. LixMyMe1-yO2+Delta (1), wherein M is at least an element selected form Ni, Co and Mn; Me is a metal element different from M; and 0.95<=x<=1.10, 0.1<=y<=1. The compound containing M and Me and the lithium compound are sintered. The sintered substance is cleaned by a cleaning fluid of a water soluble polar non-protonic solvent containing one or two components from N-methyl-2-pyrrolidone (NMP), N,N'-dimethyl-2-imidazolidinone and dimethyl sulfoxide (DMSO).

Description

technical field [0001] The present invention mainly relates to a method for producing a lithium-containing composite oxide as a positive electrode active material for a non-aqueous secondary battery. Background technique [0002] Lithium-ion batteries, which represent non-aqueous secondary batteries, are characterized by light weight, high electromotive force, and high energy density. Therefore, demand for lithium-ion batteries is increasing as a driving power source for various mobile communication devices such as cellular phones, and various portable electronic devices such as digital still cameras, video recorders, and notebook computers. [0003] A lithium ion battery includes a positive electrode containing a lithium-containing composite oxide as a positive electrode active material, a negative electrode containing a negative electrode active material capable of intercalating and deintercalating lithium, a separator separated between the positive electrode and the negat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/505H01M4/525H01M10/0525
CPCH01M4/505H01M4/525C01G45/1242C01G53/42C01G53/50H01M10/052C01P2006/40C01G51/50C01P2002/54C01G53/006C01G45/1228Y02E60/122C01P2002/52C01G51/42Y02E60/10
Inventor 渡边耕三
Owner PANASONIC CORP
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