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Synthesis method of novel cathode material nano-lithium manganese stannate for lithium-ion battery

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, process control, shorten The effect of the transmission channel

Active Publication Date: 2016-03-30
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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  • Synthesis method of novel cathode material nano-lithium manganese stannate for lithium-ion battery
  • Synthesis method of novel cathode material nano-lithium manganese stannate for lithium-ion battery
  • Synthesis method of novel cathode material nano-lithium manganese stannate for lithium-ion battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] ⑴Weigh 49.02g of manganese acetate according to the element molar ratio Mn:Sn=1:1.5 and add it to 300mL deionized water to make 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, and the precipitate was separated by suction filtration, washed with deionized water and absolute ethanol, and baked in a vacuum oven at 120°C for 12 hours to obtain MnSn(OH) 6 Precursor material;

[0030] ⑵ will get MnSn(OH) 6 Precursor material in N 2 Atmosphere, calcination at 600°C for 24h to obtain nanometer 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 of lithium carbonate, adding 60g of ethanol as a dispersion medium, 0.4g of PEG20000 as a dispersant, prepared into a uniform slurry with a solid conten...

Embodiment 2

[0035] (1) Weigh 30.20g of manganese sulfate according to the elemental molar ratio Mn:Sn=1:1 and add it to 300mL 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, and the precipitate was separated by suction filtration and washed with deionized water and absolute ethanol, then baked in a vacuum 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°C for 12 hours to obtain nanometer 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 of lithium carbonate, adding 27g of ethylene glycol as a dispersion medium, 0.2g of PEG4000 as a dispersant, prepared into a uniform slurr...

Embodiment 3

[0041] (1) Weigh 49.02g of manganese acetate according to the element molar ratio Mn:Sn=1:1 and add it to 300mL 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, and the precipitate was separated by suction filtration, washed with deionized water and absolute ethanol, and baked in a vacuum oven at 100°C for 12 hours to obtain MnSn(OH) 6 Precursor materials;

[0042] ⑵ will get MnSn(OH) 6 Precursor material in N 2 atmosphere, calcination at 400°C 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 of lithium carbonate, adding 27g of ethanol as a dispersion medium, 0.4g of PEG20000 as a dispersant, prepared into a uniform slurry with a solid content ...

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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 a novel lithium-ion battery anode material nano manganese lithium stannate. Background technique [0002] As an efficient 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 and discharge life, low self-discharge rate, and environmental friendliness. Therefore, the international community attaches great importance to the research, development and application of lithium-ion batteries. 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 d...

Claims

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Application Information

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Patent Type & Authority Applications(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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