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Power spinel lithium manganese oxide anode material and preparation method thereof

A technology of spinel lithium manganese oxide and positive electrode materials, applied in battery electrodes, electrical components, circuits, etc., can solve the problems of poor cycle performance, low volume specific capacity, fast cycle decay at high temperature, etc., and achieve stable performance, high ratio The effect of low capacity and production cost

Inactive Publication Date: 2010-08-18
QUFU ENERGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, low volume specific capacity, poor cycle performance, and fast cycle decay at high temperature are obstacles that restrict the large-scale application of lithium manganese oxide materials in lithium-ion power batteries.

Method used

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  • Power spinel lithium manganese oxide anode material and preparation method thereof
  • Power spinel lithium manganese oxide anode material and preparation method thereof
  • Power spinel lithium manganese oxide anode material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Weigh 100Kg of lithium hydroxide, and take polyurethane balls according to the mass ratio of 1:1 (material weight / ball weight) and add them to the inclined mixer for ball milling for 3 hours for later use; weigh 400Kg of electrolytic manganese dioxide (EMD), and use a cyclone Jet mill pulverized for later use; LiOH H 2 O (ball-milled), electrolytic manganese dioxide (crushed), niobium pentoxide, nano-aluminum oxide and nano-titanium dioxide are put into an inclined mixer, and polyurethane ball milling of 1 times the weight is added to mix; The raw materials are calcined at 550°C for 6 hours in a pusher plate resistance furnace, according to 1~6m 3 The flow rate of / h is fed into air or oxygen during calcination; after natural cooling to room temperature, it is taken out and ground, sieved (250 mesh) to obtain the preliminary product Li 1.12 mn 1.99 Nb 0.004 Al 0.004 Ti 0.002 o 4 . Take by weighing the preliminary product 500Kg, by molar ratio of tricobalt tetroxi...

Embodiment 2

[0036] Weigh lithium carbonate 100Kg, and take polyurethane balls according to the mass ratio of 1:1 (material weight / ball weight) and add them to the inclined mixer for ball milling for 3 hours for later use; weigh 400Kg of chemical manganese dioxide, and use a cyclone jet mill to pulverize Standby; according to the elemental molar ratio Li:Mn:Nb:Al:Ce:Zr=1.10:1.954:0.02:0.02:0.001:0.005 respectively weigh Li 2 CO 3 (calculated according to Li content / ball milled), chemical manganese dioxide (crushed), niobium oxide, aluminum hydroxide, cerium oxide and zirconia are put into the inclined mixer, and polyurethane ball milling of 1 times the weight is added to mix; Calcinate the mixed raw materials at 600°C for 8 hours in a pusher-type resistance furnace, according to 1-6m 3 The flow rate of / h is fed into air or oxygen during calcination; after natural cooling to room temperature, it is taken out and ground, sieved (250 mesh) to obtain the preliminary product Li 1.10 mn 1.95...

Embodiment 3

[0040] Weigh 100Kg of lithium carbonate, and take zirconia balls according to the mass ratio of 1:1 (material weight / ball weight) and add them to an inclined mixer for ball milling for 3 hours for later use; weigh 400Kg of manganese carbonate, and use an airflow mill to pulverize it for later use ; According to the elemental molar ratio Li: Mn: Nb: Al: Cu=1.00: 1.957: 0.02: 0.02: 0.003 respectively weigh Li 2 CO 3 (calculated according to the Li content / ball milled), manganese oxalate (crushed), niobium pentoxide, aluminum hydroxide and copper oxide are put into the oblique mixer, and 1 times the weight of zirconia balls are added and mixed by ball milling; the mixed The raw materials are calcined at 650°C for 8 hours in a tunnel-type resistance furnace, according to 1-6m 3 The flow rate of / h is fed into air or oxygen during calcination; after natural cooling to room temperature, it is taken out and ground, sieved (250 mesh) to obtain the preliminary product Li 1.00 mn 1.9...

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Abstract

The invention discloses a power spinel lithium manganese oxide anode material and a preparation method thereof. The power spinel lithium manganese oxide anode material consists of power spinel lithium manganese oxide LiaMn2-x-zNbxAlyMzO4 and a coating layer on the surface thereof. The preparation method comprises the following steps: ball-milling and mixing the treated a lithium source, a manganese source, a niobium source, an aluminum source and a doped element M, and calcining at the temperature of 550-900 DEG C; and crushing and classifying the calcined preliminary products followed by adding coating materials for secondary calcination at 750-950 DEG C, and crushing and classifying to obtain the power spinel lithium manganese oxide anode material. The invention has the advantages that the spinel lithium manganese oxide material provided by the invention has high compacted density and specific capacity, has good recycle property in normal temperature and high temperature environments, stable property and good consistency and industrialized prospect. The preparation method of the material is simple, the preparation process is easy to control and operate, and the production cost is low.

Description

technical field [0001] The invention relates to a dynamic spinel lithium manganese oxide positive electrode material and a preparation method thereof, belonging to the technical field of preparation of electrochemical power supply materials. Background technique [0002] In recent years, the application prospects of lithium-ion batteries have become more and more broad, and the energy sources of digital products, electric tools, electric bicycles, electric vehicles and other products have gradually been replaced by lithium-ion batteries. As a result, the requirements for lithium-ion batteries are getting higher and higher, and thus the requirements for lithium-ion battery cathode materials are also getting higher and higher. Lithium manganese oxide material, as a kind of positive electrode material of lithium ion battery, has the advantages of abundant resource reserves, no pollution, good discharge safety performance, high voltage, low cost, long cycle life, etc., which mee...

Claims

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Application Information

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IPC IPC(8): H01M4/131H01M4/1391
CPCY02E60/122Y02E60/10
Inventor 商士波赛喜雅勒图李安
Owner QUFU ENERGY
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