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Method for preparing lithium manganese oxide by using low-heat solid phase reaction

A technology of lithium manganese oxide and low-heat solid phase, applied in lithium oxide;/hydroxide, manganese oxide/manganese hydroxide, electrode manufacturing, etc., can solve the problem of difficult control of stoichiometric ratio, large product particles, and reaction temperature Advanced problems, to achieve the effect of high product purity, simple reaction conditions, and low synthesis temperature

Inactive Publication Date: 2005-10-26
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The traditional solid-state reaction method directly adopts the mixed calcination of lithium salt and manganese salt to prepare lithium manganese compound, but the product obtained by this method has large and uneven particles, the stoichiometric ratio is difficult to control, the reaction temperature is high, the time is long, the cost is high, and it is easy to cause lithium Loss

Method used

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  • Method for preparing lithium manganese oxide by using low-heat solid phase reaction
  • Method for preparing lithium manganese oxide by using low-heat solid phase reaction
  • Method for preparing lithium manganese oxide by using low-heat solid phase reaction

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Embodiment 1

[0030] Embodiment 1. Take by weighing 0.5 gram lithium acetate, 2.2 gram manganese acetate and 2.1 gram oxalic acid respectively, grind about one hour in agate mortar, make three kinds of materials fully mix. The mixture was thoroughly dried at 80°C, and the intermediate product was thoroughly pulverized. Finally, it was placed in a crucible and calcined at 850°C for about 12 hours to obtain black lithium-rich spinel Li 1+x mn 2 o 4 .

Embodiment 2

[0031] Embodiment 2. Weigh 0.5 gram of lithium acetate, 2.2 gram of manganese acetate and 0.7 gram of oxalic acid respectively, and grind for about one hour in an agate mortar, so that the three materials are fully mixed. The mixture was thoroughly dried at 75°C, and the intermediate product was thoroughly pulverized. Finally, it is placed in a crucible and calcined at 600°C for about 12 hours to obtain black lithium-rich spinel Li 1+x mn 2 o 4 .

Embodiment 3

[0032] Embodiment 3. Take by weighing 0.5 gram of lithium acetate, 2.2 gram of manganese acetate and 5.7 gram of sucrose respectively, grind about one hour in agate mortar, make three kinds of materials fully mix. The mixture was thoroughly dried at 80°C, and the intermediate product was thoroughly pulverized. Finally, it is placed in a crucible and calcined at 600°C for about 15 hours to obtain black lithium-rich spinel Li 1+x mn 2 o 4 .

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Abstract

The method for preparing lithium-manganese oxide by using low-beat solid phase reaction includes the following steps: according to stoichiometric ratio mixing lithium acetate, manganese acetate and solid phase organic acid or alcohol or sugar or amino acid; grinding at room temp., drying the obtained mixture at 75-85 deg.C and calcining at 350-850 deg.c for 12-18 hr. so as to obtain the invented final product Li1+xMn2O4 or Li1+xMnO2, in which x=-0.1í½+0.2. According to different stoichiometric ratio the spinelle type LiMn2O4 or laminate LiMnO2 can be obtained.

Description

1. Technical field [0001] The invention relates to a method for preparing lithium manganese oxide from lithium and manganese salts. 2. Background technology [0002] In recent years, lithium-ion batteries with the advantages of small size, light weight, high specific energy, and no memory effect have become a research hotspot all over the world, and the selection of cathode materials for lithium-ion batteries is the most important link. Compared to LiCoO 2 and LiNiO 2 , spinel-type LiMn 2 o 4 and layered LiMnO 2 With the advantages of abundant manganese metal resources, low price, simple preparation method, and less environmental pollution, they are considered to be the most promising cathode materials for the new generation of lithium-ion secondary batteries. [0003] The traditional solid-state reaction method directly adopts the mixed calcination of lithium salt and manganese salt to prepare lithium manganese compound, but the product obtained by this method has larg...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01D15/02C01G45/02H01M4/505
CPCH01M4/505Y02E60/10
Inventor 杨彧周益明忻新泉
Owner NANJING UNIV