Ternary cathode material and production method thereof

A positive electrode material and production method technology, applied in electrical components, battery electrodes, circuits, etc., can solve the problems of complex body process, high waste water treatment cost, poor processing performance, etc., and achieve simple process, good consistency, high density effect

Active Publication Date: 2011-08-31
先进储能材料国家工程研究中心有限责任公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The disadvantages of the nickel-cobalt-manganese ternary material produced by the above method are low product density and poor processability, the preparation of the precursor by the liquid phase method is complicated, and the waste water produced by the reaction pollutes the environment, and the cost of waste water treatment is very high. Poor economic benefits

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  • Ternary cathode material and production method thereof
  • Ternary cathode material and production method thereof
  • Ternary cathode material and production method thereof

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Experimental program
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Effect test

Embodiment 1

[0025] Step 1: Mix metal nickel, cobalt and manganese according to the molar ratio of 1: 1: 1. The mixture is heated and melted in an induction furnace under the condition of nitrogen protection, and the melted metal liquid is poured into an insulated crucible , sent into the guide tube and nozzle, the molten metal flow is atomized by the high-pressure nitrogen flow, the atomized metal powder is solidified and settled in the atomization tower, and finally falls into the powder collection tank for collection to obtain nickel-cobalt Manganese alloy powder. The SEM image of the analyzed nickel-cobalt-manganese alloy powder is as follows figure 2 As shown, the XRD pattern of nickel-cobalt-manganese alloy powder is as follows Figure 5 As shown, the composition of the alloy powder achieves uniform mixing at the atomic level, the powder particles are regular spherical, and the bulk density reaches 5.05 g / cm 3 , the tap density reaches 5.57 g / cm 3 .

[0026] Step 2: Oxidize the ...

Embodiment 2

[0030] Step 1: Mix metal nickel, cobalt, and manganese according to the molar ratio of 5: 2: 3. The mixture is melted in an induction furnace under the protection of argon, and the molten metal liquid is poured into an insulated crucible , sent into the guide tube and nozzle, the molten metal flow is atomized by the high-pressure argon flow, the atomized metal powder is solidified and settled in the atomization tower, and finally falls into the powder collection tank for collection to obtain nickel-cobalt Manganese alloy powder. The alloy powder is uniformly mixed at the atomic level, the powder particles are regular spherical, and the bulk density reaches 5.12 g / cm 3 , the tap density reaches 5.61 g / cm 3 .

[0031] Step 2: Oxidize the alloy powder obtained in step 1 in an oxidation furnace, the oxidation temperature is 900°C, and the oxidation time is 1 hour, keeping the alloy powder oxidized and calcined under dynamic conditions, heating evenly, and no hardening phenomenon...

Embodiment 3

[0035] Step 1: Mix metal nickel, cobalt, and manganese according to the molar ratio of 4: 2: 4. The mixture is melted in an induction furnace under the protection of helium, and the molten metal liquid is poured into an insulated crucible , sent into the guide tube and nozzle, the molten metal flow is atomized by the high-pressure helium flow, the atomized metal powder is solidified and settled in the atomization tower, and finally falls into the powder collection tank for collection to obtain nickel-cobalt Manganese alloy powder. The alloy powder is uniformly mixed at the atomic level, the powder particles are regular spherical, and the bulk density reaches 5.01 g / cm 3 , the tap density reaches 5.47g / cm 3 .

[0036] Step 2: Oxidize the alloy powder obtained in step 1 in an oxidation furnace, the oxidation temperature is 1000°C, and the oxidation time is 0.5 hours, and the alloy powder is oxidized and calcined under dynamic conditions, with uniform heating and no hardening p...

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Abstract

The invention discloses a ternary cathode material and a production method thereof. The production method comprises the following steps of melting mixing materials of metallic nickel, cobalt and manganese at high temperature under the protection of inert gas or nitrogen; executing spray granulation after melting, and then oxidizing to obtain nickel, cobalt and manganese alloy oxide; and roasting the nickel, cobalt and manganese alloy oxide and a lithium compound at a temperature of 600-1050 DEG C after mixing according to the metallic element content mole ratio of (Ni+Co+Mn): Li=1:(1-1):1.15 to obtain the ternary cathode material, wherein the ternary cathode material is epigranular, regular spherical or similar to sphere, has large tap density, higher charge-discharge capacity and better electrochemical cycle performance. The ternary cathode material is prepared by adopting nickel, cobalt and manganese as raw materials and adopting full solid-phase reaction so as to completely avoid the environment pollution caused in the process of preparing a precursor by adopting a wet process. The invention has the advantages of simple process flow, convenience for operation and high production efficiency.

Description

technical field [0001] The invention relates to a lithium ion battery positive electrode material and a production method thereof, in particular to a nickel, cobalt, manganese ternary positive electrode material and a production method thereof. Background technique [0002] In the existing secondary battery system, lithium-ion batteries are currently the most competitive secondary batteries in terms of development space and technical indicators such as life, specific energy, working voltage and self-discharge rate. At present, the positive electrode materials used in lithium-ion batteries mainly include lithium cobaltate, lithium iron phosphate, lithium manganate and ternary positive electrode materials. The ternary cathode material has the advantages of high specific capacity, good thermal stability, and low price. It is the most potential battery cathode material in the production of lithium-ion batteries that can replace lithium cobalt oxide materials. It is used in elect...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/525H01M4/505H01M4/485H01M4/1391
CPCY02E60/12Y02E60/122Y02E60/10
Inventor 李维蒋庆来刘宏兵齐士博陈杰
Owner 先进储能材料国家工程研究中心有限责任公司
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