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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, which is applied in battery electrodes, electrical components, circuits, etc., can solve the problems of low volume specific capacity, poor cycle performance, and fast cycle decay at high temperature, and achieve high specific capacity and high performance. The effect of stability and low production cost

Inactive Publication Date: 2011-12-28
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 add the polyurethane ball to the inclined mixer for 3h after ball milling according to the mass ratio of 1:1 (material weight / ball weight); weigh 400Kg of electrolytic manganese dioxide (EMD), using a cyclone type After being crushed by a jet mill for use; according to the element molar ratio Li: Mn: Nb: Al: Ti = 1.12: 1.99: 0.004: 0.004: 0.002, respectively weigh LiOH·H 2 O (ball milled), electrolytic manganese dioxide (crushed), niobium pentoxide, nano aluminum oxide and nano titanium dioxide are put into the oblique mixer, add 1 times the weight of polyurethane ball mill and mix; after mixing The raw materials are calcined in a push plate resistance furnace at 550℃ for 6h, according to 1~6m 3 The flow rate of / h is passed in air or oxygen during calcination; after it is naturally cooled 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 ...

Embodiment 2

[0036] Weigh 100Kg of lithium carbonate, and add the polyurethane ball to the inclined mixer for 3h after ball milling according to the mass ratio of 1:1 (material weight / ball weight); weigh 400Kg of chemical manganese dioxide, and use a cyclone jet mill to crush For later use; according to the element 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 zirconium oxide are put into the inclined mixer, and 1 times the weight of polyurethane ball mill is added to mix; The mixed raw materials are calcined in a push plate resistance furnace at 600℃ for 8h, according to 1~6m 3 The flow rate of / h is passed in air or oxygen during calcination; after it is naturally cooled to room temperature, it is taken out and ground, sieved (250 mesh) to obtain the preliminary product Li 1.10 Mn 1.954 Nb 0.02 A...

Embodiment 3

[0040] Weigh 100Kg of lithium carbonate, and add zirconia balls according to the mass ratio of 1:1 (material weight / ball weight) into the inclined mixer for 3h after ball milling; weigh 400Kg of manganese carbonate and use a jet mill to pulverize for use ; According to the element molar ratio Li: Mn: Nb: Al: Cu = 1.00: 1.957: 0.02: 0.02: 0.003 respectively weigh Li 2 CO 3 (Calculated by Li content / ball milled), manganese oxalate (crushed), niobium pentoxide, aluminum hydroxide and copper oxide are put into the oblique mixer, add 1 times the weight of zirconia ball mill and mix; mix the mixed The raw materials are calcined in a tunnel-type resistance furnace at 650℃ for 8h, according to 1~6m 3 The flow rate of / h is passed in air or oxygen during calcination; after it is naturally cooled to room temperature, it is taken out and ground, sieved (250 mesh) to obtain the preliminary product Li 1.00 Mn 1.957 Nb 0.02 Al 0.02 Cu 0.003 O 4 . Weigh the preliminary product 500Kg, molar rat...

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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 power type spinel lithium manganate cathode material and a preparation method thereof, and belongs to the technical field of electrochemical power supply material preparation. Background technique [0002] In recent years, the application prospects of lithium-ion batteries have become more and more broad. The energy of digital products, electric tools, electric bicycles, electric cars and other products has gradually been replaced by lithium-ion batteries. As a result, the requirements for lithium-ion batteries have become higher and higher, and thus the requirements for lithium-ion battery cathode materials have become higher and higher. Lithium manganate material, as a kind of cathode material for lithium ion batteries, has the advantages of abundant resource reserves, no pollution, good discharge safety performance, high voltage, low cost, and long cycle life. It meets the current market’s requirements for battery safety, servi...

Claims

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Application Information

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