Cobalt nickel manganese lithium oxide-cooper oxide compound positive material for lithium ion battery and preparation method thereof

A composite cathode material, cobalt-nickel-manganese-lithium oxide technology, applied in battery electrodes, circuits, electrical components, etc., can solve the problems of poor repeatability and cycle performance, achieve small particle size, improve cycle life, and reduce energy consumption Effect

Inactive Publication Date: 2011-08-24
HEFEI UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The present invention aims to provide a lithium-ion battery cobalt-nickel-manganese oxide lithium-copper oxide composite positive electrode material and its preparation method. The technical problem to be solved is the ternary layered positive electrode material LiNi x co y mn 1-x-y o 2 Poor repeat

Method used

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  • Cobalt nickel manganese lithium oxide-cooper oxide compound positive material for lithium ion battery and preparation method thereof
  • Cobalt nickel manganese lithium oxide-cooper oxide compound positive material for lithium ion battery and preparation method thereof
  • Cobalt nickel manganese lithium oxide-cooper oxide compound positive material for lithium ion battery and preparation method thereof

Examples

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Example Embodiment

[0033] Example 1:

[0034] In this embodiment, the cobalt oxide nickel manganese lithium-copper oxide composite cathode material for lithium ion batteries is prepared according to the following steps:

[0035] a. Weigh 1.471g NiO powder and 1.633g Co 2 O 3 Powder and 1.713g MnO 2 Powder, in order to compensate for Li at high temperature 2 CO 3 The loss makes Li 2 CO 3 Excess 10%, weigh out 2.399g Li 2 CO 3 Powder, add 10-20mL deionized water, put it into the mixing tank, put it into the planetary ball mill for 8 hours, take it out and dry it in an oven at 70℃ for 12 hours, then put it in a crucible and put it in the box sintering furnace. In an air atmosphere, the temperature is increased to 300°C at a heating rate of 4°C / min, and the temperature is kept for 8 hours, then the temperature is increased to 700°C for 18 hours, and then cooled to room temperature with the furnace, the sample is taken out and ball milled again and passed through a 400 mesh sieve to obtain a ternary Compo...

Example Embodiment

[0039] Example 2:

[0040] In this embodiment, the cobalt oxide nickel manganese lithium-copper oxide composite cathode material for lithium ion batteries is prepared according to the following steps:

[0041] a. Weigh 1.411g NiO powder and 1.567g Co 2 O 3 Powder and 1.643g MnO 2 In order to make up for the loss of LiOH at high temperature, the LiOH was made to exceed 10%. Weigh 2.616g LiOH powder, add 10-20mL deionized water and put it into the mixing tank, put it into the planetary ball mill and ball mill for 8 hours. Dry in an oven at 90°C for 8 hours, then place it in a crucible built in a box-type sintering furnace, heat it up to 600°C at a heating rate of 4°C / min in an air atmosphere, keep it warm for 4 hours, then continue to heat it up to 850°C, keep it warm After 12 hours, the furnace was cooled to room temperature, the sample was taken out and ball milled again and passed through a 400 mesh sieve to obtain the ternary composite oxide lithium salt LiCo 1 / 3 Ni 1 / 3 Mn 1 / 3 O ...

Example Embodiment

[0044] Example 3:

[0045] In this embodiment, the cobalt oxide nickel manganese lithium-copper oxide composite cathode material for lithium ion batteries is prepared according to the following steps:

[0046] a. Weigh 1.471g NiO powder and 1.633g Co 2 O 3 Powder and 1.713g MnO 2 Powder, in order to compensate for Li at high temperature 2 CO 3 The loss makes Li 2 CO 3 Excess 10%, weigh out 2.399g Li 2 CO 3 Add 10-20mL deionized water and put the powder into the mixing tank, put it into the planetary ball mill for 8 hours, take it out and dry it in an oven at 80°C for 10 hours, then place it in a crucible and put it in the box sintering furnace. In an air atmosphere, the temperature is raised to 500°C at a heating rate of 4°C / min, and the temperature is kept for 6 hours, then the temperature is increased to 750°C for 16 hours, and then cooled to room temperature with the furnace. The sample is taken out and ball milled again and passed through a 400 mesh sieve to obtain a ternary Co...

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Abstract

The invention discloses a cobalt nickel manganese lithium oxide-cooper oxide compound positive material for a lithium ion battery and a preparation method thereof. The compound positive material is obtained by coating cooper oxide on the surface of cobalt nickel manganese lithium oxide; and the chemical general formula of the compound positive material is LiCoxNiMn(1-x-y)O2/CuO, wherein x is large than or equal to 0.2 and less than or equal to 0.4, and y is more than or equal to 0.3 and less than or equal to 0.7. The preparation method comprises the following steps: preparing cobalt nickel manganese lithium oxide ternary compound oxide lithium salt by a high temperature solid method; and then coating the copper oxide on the surface of the cobalt nickel manganese lithium oxide through high-temperature sintering so as to obtain the cobalt nickel manganese lithium oxide-cooper oxide compound positive material for the lithium ion battery. The material provided by the invention has the advantages of high specific capacity, good circulation characteristic, short production period and the like, is suitable for industrial production, and can be applied to the fields of electromobiles, energy storing equipment, electric power tools and the like.

Description

1. Technical field [0001] The invention relates to a lithium ion battery positive electrode material and a preparation method thereof, in particular to a lithium ion battery cobalt nickel manganese lithium-copper oxide composite positive electrode material and a preparation method thereof. 2. Background technology [0002] Lithium-ion batteries have outstanding advantages such as high energy density, long cycle life, low self-discharge rate, no memory effect, and environmental protection. With the continuous advancement of technology, lithium-ion batteries have been widely used in people's lives, such as portable electronic products, new energy vehicles and other fields. As one of the core parts of lithium-ion batteries, cathode materials have always been the focus of people's research and development. Improving the performance of cathode materials is the key to improving the performance of lithium-ion batteries. The quality of the cathode material directly determines the p...

Claims

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Application Information

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IPC IPC(8): H01M4/131H01M4/525H01M4/505H01M4/1391
CPCY02E60/122Y02E60/12Y02E60/10
Inventor 朱继平杨宏伟赵俊杰许全保
Owner HEFEI UNIV OF TECH
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