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

A composite cathode material, cobalt oxide nickel manganese lithium technology, used in battery electrodes, circuits, electrical components, etc., can solve the problems of poor cycle performance and poor repeatability, and achieve improved cycle life, small particle size, and good high rate performance. Effect

Inactive Publication Date: 2013-01-09
HEFEI UNIV OF TECH
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  • 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 repeatability, poor cycle performance under high rate and high potential, etc., at the same time provide a simple process, low energy consumption, short production cycle, environmentally friendly cobalt nickel manganese lithium-copper oxide composite positive electrode material for lithium ion batteries Preparation

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

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Embodiment 1

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

[0035]a. Weigh 1.471g NiO powder, 1.633g Co 2 o 3 powder and 1.713g MnO 2 powder, where in order to make up for Li at high temperature 2 CO 3 loss, making Li 2 CO 3 Excess 10%, weigh 2.399g Li 2 CO 3 Powder, add 10-20mL deionized water and put it into a mixing tank, put it into a planetary ball mill for 8 hours, take it out and dry it in an oven at 70°C for 12 hours, then put it in a crucible and put it in a box-type sintering furnace. In the air atmosphere, heat up to 300°C at a heating rate of 4°C / min, hold for 8 hours, then continue to heat up to 700°C, hold for 18 hours, then cool down to room temperature with the furnace, take out the sample and ball mill it again and pass it through a 400-mesh sieve to obtain a ternary product. Composite oxide lithium salt LiCo 1 / 3 Ni 1 / ...

Embodiment 2

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

[0041] a. Weigh 1.411g NiO powder, 1.567g Co 2 o 3 powder and 1.643g MnO 2 Powder, wherein in order to make up for the loss of LiOH at high temperature, make LiOH excess 10%, weigh 2.616g LiOH powder, add 10-20mL deionized water and put it into a mixing tank, put it into a planetary ball mill for ball milling for 8 hours, take it out and put it in Dry in an oven at 90°C for 8 hours, then put it in a crucible and put it in a box-type sintering furnace, raise the temperature to 600°C at a rate of 4°C / min in an air atmosphere, keep it for 4 hours, then continue to heat up to 850°C, keep it 12 hours, then cool to room temperature with the furnace, take out the sample and ball mill again and pass through a 400 mesh sieve to obtain the ternary composite oxide lithium salt LiCo 1 / 3 Ni 1 / 3 ...

Embodiment 3

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

[0046] a. Weigh 1.471g NiO powder, 1.633g Co 2 o 3 powder and 1.713g MnO 2 powder, where in order to make up for Li at high temperature 2 CO 3 loss, making Li 2 CO 3 Excess 10%, weigh 2.399g Li 2 CO 3 Powder, add 10-20mL deionized water and put it into the mixing tank, put it into a planetary ball mill for 8 hours, take it out and dry it in an oven at 80°C for 10 hours, then put it in a crucible and put it in a box-type sintering furnace. In the air atmosphere, heat up to 500°C at a heating rate of 4°C / min, hold for 6 hours, then continue to heat up to 750°C, hold for 16 hours, then cool to room temperature with the furnace, take out the sample and ball mill it again and pass it through a 400-mesh sieve to obtain a ternary product. Composite oxide lithium salt LiCo 1 / 3 Ni 1 / 3 ...

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