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Synthetic method for novel anode material, namely manganese lithium stannate, for lithium ion battery

A lithium-ion battery, lithium manganese stannate technology, applied in battery electrodes, batteries, positive electrodes, etc., can solve the problems of limiting the competitiveness of high-energy batteries, limited reserves of cobalt and nickel resources, and low energy density, and achieve electrochemical performance. Excellent, high equipment utilization, uniform raw material composition

Inactive Publication Date: 2016-01-20
HEFEI GUOXUAN HIGH TECH POWER ENERGY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, cobalt and nickel resource reserves are limited, expensive and highly toxic, and its future development and application are bound to be limited; while lithium manganese oxide is low in cost, rich in resources, and good in safety, but it also has poor high temperature performance and low capacity. Disadvantages; LiFePO 4 As a commonly used material in the current power market, the material has good safety and cycle stability, but its low energy density limits the competitiveness of high-energy batteries in the future

Method used

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  • Synthetic method for novel anode material, namely manganese lithium stannate, for lithium ion battery
  • Synthetic method for novel anode material, namely manganese lithium stannate, for lithium ion battery
  • Synthetic method for novel anode material, namely manganese lithium stannate, for lithium ion battery

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Embodiment 1

[0025] A kind of synthetic method of novel lithium ion battery cathode material manganese stannate lithium, comprises the following steps:

[0026] (1) Take lithium hydroxide 4.2g, manganese acetate dihydrate 18.61g and crystalline tin tetrachloride 35.06g according to the molar ratio Li:Mn:Sn=1.1:1:1, according to the total weight of lithium source, manganese source and tin source 1.0% Add 0.6g PEG20000 as a dispersant, add 90mL of absolute ethanol as a dispersion medium, and after ball milling for 6 hours to form a uniform slurry with a solid content of 45%, dry at 80°C for 24 hours to obtain a precursor of lithium manganese stannate ;

[0027] (2) Pre-calcining the precursor obtained in step (1) in an air atmosphere at 400°C for 10 hours to obtain a lithium manganese stannate calcined material composed of lithium oxide, manganese oxide and tin dioxide;

[0028] (3) After grinding and pulverizing the lithium manganese stannate pre-sintered material, sintering at a high temp...

Embodiment 2

[0030] A kind of synthetic method of novel lithium ion battery cathode material manganese stannate lithium, comprises the following steps:

[0031] (1) Weigh 3.8g of lithium hydroxide, 18.61g of manganese acetate dihydrate and 35.06g of crystalline tin tetrachloride according to the molar ratio Li:Mn:Sn=1.0:1:1, according to 1.0% of the weight of lithium source, manganese source and tin source % Add 0.6g PEG4000 as a dispersant, add 90mL of absolute ethanol as a dispersion medium, form a uniform slurry with a solid content of 45% after ball milling for 6 hours, then dry at 80°C for 24 hours to obtain a lithium manganese stannate precursor;

[0032] (2) Pre-calcining the precursor obtained in step (1) in an air atmosphere at 500°C for 10 hours to obtain a lithium manganese stannate calcined material composed of lithium oxide, manganese oxide and tin dioxide;

[0033] (3) Grinding and pulverizing the lithium manganese stannate pre-sintered material, and then sintering at a high ...

Embodiment 3

[0035] A kind of synthetic method of novel lithium ion battery cathode material manganese stannate lithium, comprises the following steps:

[0036] (1) Weigh 4.2g of lithium hydroxide, 18.61g of manganese acetate dihydrate and 35.06g of crystalline tin tetrachloride according to the molar ratio Li:Mn:Sn=1.1:1:1, according to 1.0% of the weight of lithium source, manganese source and tin source % Add 0.6g PEG20000 as a dispersant, add 90mL of absolute ethanol as a dispersion medium, and after ball milling for 6 hours to form a uniform slurry with a solid content of 45%, dry at 80°C for 24 hours to obtain a lithium manganese stannate precursor;

[0037] (2) Pre-calcining the precursor obtained in step (1) in an air atmosphere at 400°C for 10 hours to obtain a lithium manganese stannate calcined material composed of lithium oxide, manganese oxide and tin dioxide;

[0038] (3) After grinding and pulverizing the lithium manganese stannate pre-sintered material, sintering at a high ...

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Abstract

The invention discloses a synthetic method for a synthetic method for novel anode material, namely manganese lithium stannate, for a lithium ion battery. A chemical formula of manganese lithium stannate is LiMnSnO4, and the specific preparation method comprises the following steps of adding an appropriate amount of dispersion medium and dispersing agent after weighting a lithium source, a manganese source and a tin source, carrying out drying preparation to obtain an LiMnSnO4 precursor after uniformly mixing through a solid phase method, carrying out grinding and crushing treatment on the precursor after pre-sintering at low temperature, and sintering at high temperature to obtain an LiMnSnO4 anode material. The LiMnSnO4 anode material obtained by the invention is provided with a higher discharge platform and has better cycling stability, and meanwhile, the method provided by the invention is beneficial for large-scale production, and popularization and application of the LiMnSnO4 anode material.

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 cathode material 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 deve...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/485H01M4/505H01M4/131H01M4/1391H01M10/0525
CPCH01M4/131H01M4/1391H01M4/485H01M4/505H01M10/0525H01M2004/028H01M2220/20H01M2220/30Y02E60/10
Inventor 马守龙
Owner HEFEI GUOXUAN HIGH TECH POWER ENERGY
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