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Lithium composite oxide and lithium secondary battery comprising same

A technology of composite oxides and oxides, which is applied in the direction of secondary batteries, nickel compounds, battery electrodes, etc., can solve the problems that the stability of positive electrode active materials and the electrical characteristics of secondary batteries do not fully reach a satisfactory level, and achieve the purpose of inhibiting The effect of side effects

Pending Publication Date: 2021-06-01
ECOPRO BM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the stability of the positive electrode active material and the electrical characteristics as a secondary battery, which are in a trade-off relationship, have not sufficiently reached a satisfactory level.

Method used

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  • Lithium composite oxide and lithium secondary battery comprising same
  • Lithium composite oxide and lithium secondary battery comprising same
  • Lithium composite oxide and lithium secondary battery comprising same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0148] Synthesis of spherical Ni by co-precipitation method 0.91 co 0.08 mn 0.01 (OH) 2 Hydroxide precursor. In a 90L reactor, 25 wt% NaOH and 30 wt% NH 4 Add OH to 1.5M complex transition metal sulfuric acid aqueous solution, which is prepared by mixing nickel sulfate, cobalt sulfate and manganese sulfate in a molar ratio of 91:8:1. The pH in the reactor was kept at 11.5 and the reactor temperature at this time was kept at 60 °C, and N as an inert gas 2 Put into the reactor to prevent the prepared precursor from being oxidized. After the synthesis stirring is completed, the filter press (Filter press, F / P) equipment is used for washing and dehydration to obtain Ni 0.91 co 0.08 mn 0.01 (OH) 2 Hydroxide precursor.

[0149] Next, after adding LiOH and niobium-containing raw materials (Nb 2 o 5 ), fired to prepare lithium composite oxide. Specifically, when LiOH and niobium-containing raw materials (Nb 2 o 5 ) after mixing with the precursor, keep O in the sinterin...

Embodiment 2

[0152] In addition to mixing boron-containing raw materials (H 3 BO 3 ) and niobium-containing raw materials (Nb 2 o 5 ) except that all the other prepared lithium composite oxide in the same manner as in Example 1. Mixed boron-containing raw materials (H 3 BO 3 ), so that the above-mentioned boron-containing raw material (H 3 BO 3 ) content is 1.0 mol% with respect to the total composition.

Embodiment 3

[0154] In addition to mixing aluminum-containing raw materials (Al(OH) 3 ) and niobium-containing raw materials (Nb 2 o 5 ) except that all the other prepared lithium composite oxide in the same manner as in Example 1. Mixed aluminum-containing raw materials (Al(OH) 3 ), so that the above-mentioned aluminum-containing raw material (Al(OH) 3 ) content is 1.0 mol% with respect to the total composition.

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Abstract

The present invention relates to a lithium composite oxide having improved stability and electrical characteristics as a positive electrode material by inhibiting an interfacial side reaction in the lithium composite oxide and improving the stability of a crystal structure and ion conductivity, and a lithium secondary battery including the same.

Description

technical field [0001] The present invention relates to a lithium composite oxide that improves stability and electrical characteristics as a positive electrode material by suppressing interfacial side reactions in the lithium composite oxide and improving stability of a crystal structure and ion conductivity, and a lithium secondary battery including the same. Background technique [0002] Batteries store electricity using substances at the positive and negative electrodes that react electrochemically. A representative example of such a battery is a lithium secondary battery that stores electric energy from a change in chemical potential during intercalation / deintercalation of lithium ions of a positive electrode and a negative electrode. [0003] The above-mentioned lithium secondary battery is made by using materials capable of reversibly intercalating or deintercalating lithium ions as positive electrode active materials and negative electrode active materials, and filli...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/485H01M4/505H01M4/525H01M10/0525
CPCH01M4/505H01M4/525H01M4/485H01M10/0525H01M4/366H01M2004/028C01G53/42C01P2002/72C01P2004/50C01P2004/84C01P2002/52C01P2004/03C01P2004/61C01P2004/62C01P2002/77C01P2004/32C01G53/006C01P2004/04C01P2002/85C01G53/50Y02E60/10H01M4/628H01M10/052C01P2002/54C01P2002/60C01P2002/78C01P2006/40
Inventor 崔文豪庾炫钟李昌祐千裕敬
Owner ECOPRO BM CO LTD