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Nano spherical manganese tetroxide negative electrode material and preparation method thereof

A technology of manganese tetroxide, negative electrode material, applied in nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve problems such as inability to meet demand, achieve good cycle stability, high reversible capacity, Excellent performance of lithium battery

Inactive Publication Date: 2018-04-17
SUZHOU YOULION BATTERY INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Chinese patent CN201710128110 discloses a nano-particle material of manganese tetraoxide with controllable particle size synthesized at room temperature and its preparation method. It adopts a co-precipitation method to prepare spherical manganese tetraoxide from manganese acetate and strong base in an alcohol phase environment. Manganese, the trimanganese tetraoxide is charged and discharged 60 times at a constant current at a current density of 100mA / g, and its reversible capacity is 400mAh / g. Although the reversible capacity is slightly higher than that of carbon materials, it cannot meet the market demand.

Method used

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  • Nano spherical manganese tetroxide negative electrode material and preparation method thereof
  • Nano spherical manganese tetroxide negative electrode material and preparation method thereof
  • Nano spherical manganese tetroxide negative electrode material and preparation method thereof

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Embodiment 1

[0025] The components of a nano-spherical manganese tetraoxide negative electrode material provided in Example 1 include: 0.3% of anhydrous manganese sulfate, 1.7% of ammonium bicarbonate, 86.1% of deionized water, and 11.9% of ethanol.

[0026] The preparation method of a nano-spherical manganese tetraoxide negative electrode material provided in the first embodiment comprises the following steps:

[0027] 1) The above-mentioned manganese sulfate, ethanol and 50% deionized water are made into solution A;

[0028] 2) The above-mentioned ammonium bicarbonate and the remaining 50% deionized water are made into solution B;

[0029] 3) The solution A was magnetically stirred for 1 h, and the solution B was added dropwise while stirring, and finally the suspension C was obtained;

[0030] 4) Suspension C was sequentially filtered, washed and dried to prepare MnCO 3 ·xH 2 O, the drying temperature is 60°C, and the drying time is 8h;

[0031] 5) MnCO 3 ·xH 2 O high temperature ...

Embodiment 2

[0035] Others are the same as the above-mentioned embodiment one, except that the components of a nano-spherical manganese tetraoxide negative electrode material provided in this embodiment two include: 0.7% manganese sulfate monohydrate; 3.4% ammonium bicarbonate; deionized water 84.3%; ethanol 11.6%.

[0036] The preparation method of a nano-spherical manganese tetraoxide negative electrode material provided in the second embodiment comprises the following steps:

[0037] 1) The above-mentioned manganese sulfate, ethanol and 50% deionized water are made into solution A;

[0038] 2) The above-mentioned ammonium bicarbonate and the remaining 50% deionized water are made into solution B;

[0039] 3) The solution A was magnetically stirred for 6 hours, and the solution B was added dropwise while stirring to finally obtain the suspension C;

[0040] 4) Suspension C was sequentially filtered, washed and dried to prepare MnCO 3 ·xH 2 O, the drying temperature is 100°C, and the ...

Embodiment 3

[0043] Others are the same as the above-mentioned embodiment one, except that the components of a nano-spherical manganese tetraoxide negative electrode material provided in the third embodiment include: 0.4% manganese sulfate monohydrate; 1.7% ammonium bicarbonate; deionized water 86.0%; ethanol 11.9%.

[0044] The preparation method of a kind of nano-spherical manganese tetraoxide negative electrode material provided in the third embodiment comprises the following steps:

[0045] 1) The above-mentioned manganese sulfate, ethanol and 50% deionized water are made into solution A;

[0046] 2) The above-mentioned ammonium bicarbonate and the remaining 50% deionized water are made into solution B;

[0047] 3) The solution A was magnetically stirred for 3 hours, and the solution B was added dropwise while stirring to finally obtain the suspension C;

[0048] 4) Suspension C was sequentially filtered, washed and dried to prepare MnCO 3 ·xH 2 O, the drying temperature is 80°C, a...

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Abstract

The invention provides a nano spherical manganese tetroxide negative electrode material, which comprises the following components in percentages by weight: 0.3-0.7% of manganese sulfate, 1.7-3.4% of ammonium bicarbonate, 84.3-86.1% of deionized water and 11.6-11.9% of ethyl alcohol. The invention further discloses a preparation method of the nano spherical manganese tetroxide negative electrode material. The method comprises the steps of preparing a solution A from the manganese sulfate, the ethyl alcohol and 50% of deionized water; preparing a solution B from the ammonium bicarbonate and theremaining deionized water; magnetically stirring the solution A for 1-6h and dropwise adding the solution B while stirring to obtain a suspension liquid C; filtering, washing and drying the suspensionliquid C to prepare MnCO3.xH2O; and carrying out high-temperature calcination on the MnCO3.xH2O to prepare a manganese tetroxide negative electrode material. Compared with the prior art, the nano spherical manganese tetroxide negative electrode material has excellent lithium battery performance and has relatively high reversible capacity and good cycling stability.

Description

technical field [0001] The invention relates to the field of battery negative electrode materials, in particular to a nano-spherical trimanganese tetraoxide negative electrode material and a preparation method thereof. Background technique [0002] Since the first lithium-ion battery appeared in 1970, lithium-ion batteries have been favored by researchers at home and abroad. As an important part of lithium-ion batteries, anode materials play a decisive role in the energy density of lithium-ion batteries, and have become a hot issue in battery research and development today. At present, the most widely used anode material is embedded anode material, and carbon anode material is a typical representative of it. However, carbon anode materials are limited by their low theoretical capacity, which greatly limits the development and application of lithium-ion batteries. [0003] In this context, conversion reaction anode materials have attracted widespread attention due to their ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/50H01M10/0525B82Y30/00
CPCB82Y30/00H01M4/50H01M10/0525Y02E60/10
Inventor 赵蒙晰
Owner SUZHOU YOULION BATTERY INC