Method for preparing cubic phase li4mn5o12

A cubic phase, 24-hour technology, applied in the direction of manganese oxide/manganese hydroxide, manganate/permanganate, etc., can solve the problems of long preparation cycle and complicated operation process, and achieve stable properties and cheap and easy-to-obtain raw materials , the effect of less waste

Inactive Publication Date: 2015-08-19
EAST CHINA UNIV OF SCI & TECH
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  • Abstract
  • Description
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Problems solved by technology

However, both the "sol-gel method" and the "hydrothermal method" have the defects of complicated operation process and long preparation period.

Method used

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  • Method for preparing cubic phase li4mn5o12
  • Method for preparing cubic phase li4mn5o12
  • Method for preparing cubic phase li4mn5o12

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Grind 14.9g manganese sulfate monohydrate and 3.7g lithium hydroxide monohydrate evenly in a mortar; transfer the obtained mixture to a muffle furnace, and calcinate at 350°C for 24 hours, wherein the air flow rate is 50mL / min, Get the cubic phase Li 4 mn 5 o 12 , the XRD pattern of the product is shown in figure 1 , SEM image see figure 2 ;Depend on figure 1 , 2 It can be seen that the pure phase of Li can be obtained under the calcination conditions adopted 4 mn 5 o 12 , and the particle size of the product is relatively uniform.

Embodiment 2

[0033] Grind 4.6g of manganese carbonate and 1.7g of lithium carbonate in a mortar and mortar; transfer the resulting mixture to a muffle furnace and calcinate at 400°C for 24 hours with an air flow rate of 50mL / min to obtain Li 4 mn 5 o 12 , the XRD pattern of the product is shown in figure 1 .

Embodiment 3

[0035] Grind 4.6g of manganese chloride and 1.7g of lithium chloride in a mortar and mortar; transfer the resulting mixture to a muffle furnace and calcinate at 450°C for 24 hours with an air flow rate of 100mL / min to obtain Li 4 mn 5 o 12 , the XRD pattern of the product is shown in figure 1 .

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Abstract

The invention relates to a method for preparing cubic phase Li4Mn5O12. The main step of the method is as follows: calcining a solid phase mixture which is mainly constituted by a solid phase divalent manganese salt and a solid phase lithium salt or / and a solid phase lithium hydroxide at the temperature of 350 DEG C-500 DEG C for at least 6 hours in an air atmosphere to obtain a target product, wherein the molar ratio of the manganese element to the lithium element is (0.6-2): 1. The method disclosed by the invention has the following advantages: (1) raw materials are low in cost and easy to obtain, the molar ratio of the lithium element to the manganese element is relatively low, and the waste of the lithium-containing raw material is little; and (2) the preparation conditions are relatively mild (the specific representation is that the calcining temperature is not high, and inert gas is not required for protection), the preparation process is simple, the preparation period is short and the like. The cubic phase Li4Mn5O12 prepared by the method disclosed by the invention has a spinel structure and stable nature, and can be used as an electrode material of a lithium battery or a precursor for preparing a lithium ion sieve (MnO2.0.31H2O).

Description

technical field [0001] The invention relates to a method for preparing a cubic phase ternary composite oxide, in particular to a method for preparing a cubic phase Li 4 mn 5 o 12 Methods. Background technique [0002] Cubic phase Li 4 mn 5 o 12 , because of its large capacitance in the 3V region and good cycle stability, it can be used as an electrode material for lithium batteries. In addition, the cubic phase Li 4 mn 5 o 12 Lithium ion sieve (MnO 2 0.31H 2 O), the Li-ion sieve (MnO 2 0.31H 2 O) It is especially suitable for the enrichment and extraction of lithium from solutions containing low concentrations of lithium and high concentrations of impurities (such as lithium-containing solutions such as salt lake brine, well water, and seawater). [0003] So far, the preparation of cubic Li 4 mn 5 o 12 The current methods mainly include "sol-gel method" and "hydrothermal method", each of which has its own advantages and disadvantages. However, both the "sol-...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G45/12C01G45/02
Inventor 孙淑英肖伽励宋兴福李平汪瑾于建国
Owner EAST CHINA UNIV OF SCI & TECH
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