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High-temperature type lithium manganate anode material for power lithium ion battery and preparation method of high-temperature type lithium manganate anode material

A technology for lithium-ion batteries and positive electrode materials, applied in battery electrodes, circuits, electrical components, etc., can solve problems such as restricted applications, fast capacity decay, and poor high-temperature storage performance, and achieve good discharge specific capacity, low cost, and easy implementation Effect

Active Publication Date: 2015-04-01
北京盟固利新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to its shortcomings and deficiencies such as rapid capacity decay at room temperature, especially at high temperature (55°C), and poor high-temperature storage performance, it has seriously restricted its application in high-end fields such as power lithium-ion batteries.

Method used

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  • High-temperature type lithium manganate anode material for power lithium ion battery and preparation method of high-temperature type lithium manganate anode material
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  • High-temperature type lithium manganate anode material for power lithium ion battery and preparation method of high-temperature type lithium manganate anode material

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preparation example Construction

[0069] According to another aspect of the present invention, there is provided a method for preparing a high-temperature type lithium manganate positive electrode material for a power lithium ion battery, the method comprising the following steps:

[0070] Step 1, the preparation of the precursor of positive electrode material,

[0071] Step 2, preparation of the core material shown in formula I,

[0072] Step 3, preparation of positive electrode material.

[0073] In the above step 1, the preparation method of the precursor of the high-temperature lithium manganate cathode material is not particularly limited, and methods such as high-temperature solid-state reaction method, sol-gel method, and co-precipitation method are all available.

[0074] In a preferred implementation method, the preparation method of the precursor of the positive electrode material comprises the following steps:

[0075] 1) The soluble salt of manganese and the soluble salt containing element A are ...

Embodiment 1

[0123] Prepare the core material as: Li 1.08 mn 1.9 Al 0.06+0.04 O 4 , the cladding layer is: 0.01Al 2 O 3 positive electrode material

[0124] Step 1, the preparation of the precursor:

[0125] 1) Weigh 984g MnSO respectively 4 ·H 2 O, 120g Al 2 (SO 4 ) 3 18H 2 O was added to deionized water to prepare 2L of mixed aqueous solution, and was added to the CSTR reactor at a rate of 1ml / min.

[0126] 2) Prepare 4mol / l aqueous sodium hydroxide solution and 3mol / l ammonia solution, add ammonia solution and sodium hydroxide solution to the CSTR reactor filled with deionized water with a peristaltic pump,

[0127] Among them, the adding rate of the ammonia solution is controlled to be 0.5ml / min, the adding rate of the sodium hydroxide aqueous solution is controlled to stabilize the pH value of the system at 9.0±0.5, the reaction temperature is controlled to be 60±2°C, the stirring speed is 1200r / min, continuous Reaction for 20h, followed by aging f...

Embodiment 2

[0138] Prepare the core material as: Li 1.102 mn 1.9 co 0.05 Cr 0.05 O 4 , the cladding layer is: 0.005NiO cathode material

[0139] Step 1, the preparation of the precursor:

[0140] 1) take by weighing 2097g mass percent respectively and be 50% Mn (NO 3 ) 2 Aqueous solution, 59g Co(NO 3 ) 2 ·6H 2 O was added to deionized water to prepare 2L of mixed aqueous solution, and was added to the CSTR reactor at a rate of 1ml / min.

[0141] 2) Prepare 2mol / L aqueous sodium carbonate solution and 3mol / L ammonia solution, add ammonia solution and sodium carbonate solution to the CSTR reactor filled with deionized water with a peristaltic pump,

[0142] Among them, control the adding rate of ammonia solution to 0.5ml / min, control the adding rate of sodium carbonate aqueous solution to stabilize the pH value at 7.0±0.05, control the reaction temperature to 60±2°C, stir at 1200r / min, react continuously for 20h, and then Then aging for 5h,

[0143] 3) The p...

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Abstract

The invention discloses a high-temperature type lithium manganate anode material for a power lithium ion battery. The high-temperature type lithium manganate anode material consists of a core material as shown in a formula Li1+xMn2-y-zAyQzO4, and a coating layer on the surface of the core material, wherein the coating layer is one or more of cobaltosic oxide, aluminum oxide and nickel protoxide. The anode material is excellent in high-temperature property, and is good in specific discharge capacity, capacity retention ratio and electrochemical circulation property at high temperature. In addition, the preparation method of the anode material disclosed by the invention is simple in production process, easy to achieve and low in cost, and can be applied to large-scale industrialization production.

Description

technical field [0001] The invention relates to the field of lithium-ion batteries, in particular to a high-temperature lithium manganate cathode material for power lithium-ion batteries and a preparation method thereof. Background technique [0002] Today, as environmental problems and energy crises are intensifying, the new energy industry represented by electric vehicles is in the ascendant. Among them, lithium-ion batteries have broad development prospects in the field of electric vehicle power batteries due to their advantages such as high working voltage, high energy density, light weight, small size, good safety, good cycle life, and environmental protection. [0003] At present, the lithium-ion battery cathode materials widely used in the market mainly include lithium cobalt oxide, spinel lithium manganese oxide, ternary materials, and lithium iron phosphate. Compared with other cathode materials, lithium manganate has a very broad application prospect in the power ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/505
CPCH01M4/505Y02E60/10
Inventor 郝振佳江卫军李化一张溪苏迎春崔妍文博白珍辉朱晓沛庞自钊高利亭吴剑文
Owner 北京盟固利新材料科技有限公司
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