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A kind of synthetic method of nano manganese lithium stannate of novel lithium-ion battery cathode material

A technology for lithium-ion batteries and cathode materials, applied in battery electrodes, nanotechnology for materials and surface science, tin compounds, etc., can solve problems such as inability to mass-produce, achieve high equipment utilization, shorten transmission channels, The effect of easy process

Active Publication Date: 2018-02-06
HEFEI GUOXUAN HIGH TECH POWER ENERGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the urea-assisted combustion method cannot produce such materials on a large scale

Method used

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  • A kind of synthetic method of nano manganese lithium stannate of novel lithium-ion battery cathode material
  • A kind of synthetic method of nano manganese lithium stannate of novel lithium-ion battery cathode material
  • A kind of synthetic method of nano manganese lithium stannate of novel lithium-ion battery cathode material

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Experimental program
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Effect test

Embodiment 1

[0029] (1) According to the element molar ratio Mn:Sn=1:1.5, weigh 49.02g of manganese acetate and add it to 300mL of deionized water to prepare a transparent solution. Weigh 80.02g of sodium stannate and add it to 100mL of deionized water to obtain a concentrated sodium stannate solution. The sodium stannate solution was added dropwise to the manganese acetate solution to form a precipitate. The precipitate was separated by suction filtration, washed with deionized water and absolute ethanol, and then baked in a vacuum drying oven at 120 °C for 12 h to obtain MnSn(OH) 6 precursor material;

[0030] (2) MnSn(OH) will be obtained 6 Precursor material in N 2 Atmosphere, calcination at 600℃ for 24h to obtain nano-MnSnO 3 Material;

[0031] (3) According to the molar ratio of MnSnO 3 : Li=1:1.2 Weigh 33.24g nanometer MnSnO 3 materials and 6.65g lithium carbonate, adding 60g ethanol as a dispersing medium, 0.4g PEG20000 as a dispersing agent, and preparing a uniform slurry wit...

Embodiment 2

[0035] (1) According to the element molar ratio Mn:Sn=1:1, weigh 30.20g of manganese sulfate and add it to 300mL of deionized water to prepare a transparent solution. Weigh 53.35g of sodium stannate and add it to 100mL of deionized water to obtain a concentrated sodium stannate solution. The sodium stannate solution was added dropwise to the manganese acetate solution to form a precipitate. The precipitate was separated by suction filtration, washed with deionized water and absolute ethanol, and then baked in a vacuum drying oven at 100 °C for 24 hours to obtain MnSn(OH) 6 precursor material;

[0036] ⑵ will get MnSn (OH )6 Precursor material in N 2 Atmosphere, calcination at 400℃ for 12h to obtain nano-MnSnO 3 Material;

[0037] (3) According to the molar ratio of MnSnO 3 : Li=1:1.2 Weigh 33.24g nanometer MnSnO 3Materials and 6.65g lithium carbonate, adding 27g ethylene glycol as a dispersing medium and 0.2g PEG4000 as a dispersing agent, prepared into a uniform slurry w...

Embodiment 3

[0041] (1) According to the element molar ratio Mn:Sn=1:1, weigh 49.02g of manganese acetate and add it to 300mL of deionized water to prepare a transparent solution. Weigh 53.35g of sodium stannate and add it to 100mL of deionized water to obtain a concentrated sodium stannate solution. The sodium stannate solution was added dropwise to the manganese acetate solution to form a precipitate. The precipitate was separated by suction filtration, washed with deionized water and absolute ethanol, and then baked in a vacuum drying oven at 100 °C for 12 h to obtain MnSn(OH) 6 precursor material;

[0042] (2) MnSn(OH) will be obtained 6 Precursor material in N 2 Atmosphere, calcination at 400℃ for 24h to obtain nano-MnSnO 3 Material;

[0043] (3) According to the molar ratio of MnSnO 3 : Li=1:1 Weigh 33.24g nanometer MnSnO 3 materials and 5.54g lithium carbonate, adding 27g ethanol as a dispersing medium, 0.4g PEG20000 as a dispersing agent, and preparing a uniform slurry with a ...

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Abstract

The invention discloses a synthesis method of a novel cathode material nano-lithium manganese stannate for a lithium-ion battery. A chemical formula of lithium manganese stannate is LiMnSnO<4>; and the specific preparation method comprises the following steps: mixing a tin source with a manganese source, and then preparing an MnSn(OH)<6> precursor material by a solution precipitation method; burning the MnSn(OH)<6> precursor material in an inert atmosphere to obtain a nano MnSnO<3> material; mixing the nano MnSnO<3> material with a lithium source evenly through a solid phase method, and drying the mixture to obtain an LiMnSnO<4> precursor; and carrying out pre-sintering treatment on the LiMnSnO<4> precursor, grinding the LiMnSnO<4> precursor, and carrying out high-temperature sintering to obtain the LiMnSnO<4> cathode material. According to the nano LiMnSnO<4> cathode material synthesized by the method, shortening a transmission channel of lithium ions in charging and discharging processes is facilitated; and the rate capability and the cycling stability of the LiMnSnO<4> cathode material are improved.

Description

technical field [0001] The invention belongs to the field of lithium ion battery materials, and in particular relates to a method for synthesizing nanometer lithium manganese stannate as a cathode material of a novel lithium ion battery. Background technique [0002] As a high-efficiency energy storage device, lithium-ion batteries have been widely used in various portable electronic products, communication tools and electric vehicles in recent years. Compared with traditional secondary batteries, lithium-ion batteries have the advantages of high energy density, high voltage platform, long charge-discharge life, low self-discharge rate, and environmental friendliness. Therefore, the international research, development and application of lithium-ion batteries attaches great importance. Among them, the cathode active material is one of the most important components of lithium-ion batteries, and the development of high-performance cathode materials has become the key to the de...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/58H01M10/0525B82Y30/00C01G19/00
CPCB82Y30/00C01G19/006H01M4/5825H01M10/0525Y02E60/10
Inventor 马守龙
Owner HEFEI GUOXUAN HIGH TECH POWER ENERGY
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