Positive electrode active material particle powder for non-aqueous electrolyte secondary battery, method for producing same, and non-aqueous electrolyte secondary battery

a technology of active materials and positive electrodes, which is applied in the direction of positive electrodes, manganese compounds, inorganic chemistry, etc., can solve the problems of inferior charge/discharge cycle properties and storage properties at high temperatures, increase production costs, etc., and achieve excellent charge/discharge cycle properties and storage properties, excellent high temperature properties

Active Publication Date: 2018-06-28
TODA IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The technical effect of this patented particles is their ability to withstand very high temperatures without losing their performance or causing damage during use. This makes them ideal for use in batteries used in applications where they are subjected to harsh environments such as automobile engines.

Problems solved by technology

The technical problem addressed in this patent is how to improve the stability and performance of lithium ion secondary batteries with improved efficiency and reduced costs while maintaining their environmentally friendly characteristics.

Method used

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  • Positive electrode active material particle powder for non-aqueous electrolyte secondary battery, method for producing same, and non-aqueous electrolyte secondary battery
  • Positive electrode active material particle powder for non-aqueous electrolyte secondary battery, method for producing same, and non-aqueous electrolyte secondary battery
  • Positive electrode active material particle powder for non-aqueous electrolyte secondary battery, method for producing same, and non-aqueous electrolyte secondary battery

Examples

Experimental program
Comparison scheme
Effect test

example 2

[0113]As shown in Table 1, in the positive electrode active material particle powder pertaining to Example 2, the added amount of Nb was changed from the added amount used in Example 1. Production was otherwise identical.

example 3

[0114]The positive electrode active material particle powder pertaining to Example 3 was produced as follows.

[0115]As shown in Table 1, trimanganese tetroxide (Mn3O4) of crystallite size 92 nm and average secondary particle diameter 10.5 μm, lithium carbonate (Li2CO3), and aluminium hydroxide (Al(OH)3) were mixed at a ratio of Li / (Mn+Al)=0.56; Nb as a crystal plane growth suppressor was weighed and mixed as niobium oxide (Nb2O5) at 0.55 mol % with respect to moles of Mn in trimanganese tetroxide; then fired in an air atmosphere at 810° C. for three hours to produce lithium manganese oxide particle powder. That is, the positive electrode active material particle powder pertaining to Example 3 had a composition of Li1.08Mn1.85Al0.07O4+LiNbO3.

[0116]Other elements of the lithium ion secondary battery were the same as in Examples 1 and 2.

example 4

[0117]The positive electrode active material particle powder pertaining to Example 4 was produced as follows.

[0118]As shown in Table 1, trimanganese tetroxide (Mn3O4) of crystallite size 92 nm and average secondary particle diameter 10.5 μm, lithium carbonate (Li2CO3), and magnesium oxide (MgO) were mixed at a ratio of Li / (Mn+Mg)=0.55; Nb as a crystal plane growth suppressor was weighed and mixed as niobium oxide (Nb2O5) at 0.55 mol % with respect to moles of Mn in trimanganese tetroxide; then fired in an air atmosphere at 810° C. for three hours to produce lithium manganese oxide particle powder. That is, the positive electrode active material particle powder pertaining to Example 4 had a composition of Li1.06Mn1.89Mg0.05O4+LiNbO3.

[0119]Other elements of the lithium ion secondary battery were the same as in Examples 1, 2, and 3.

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Abstract

Positive electrode active material particle powder includes lithium manganese oxide particle powder having Li and Mn as main components and a cubic spinel structure with an Fd-3m space group. The lithium manganese oxide particle powder is composed of secondary particles, which are aggregates of primary particles, an average particle diameter (D50) of the secondary particles being from 4 μm to 20 μm, and at least 80% of the primary particles exposed on surfaces of the secondary particles each have a polyhedral shape in which each (111) plane thereof is adjacent to at least one (100) plane thereof.

Description

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Claims

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Application Information

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Owner TODA IND
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