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Preparation method of an ordered mesoporous metal oxide@carbon lithium-ion battery anode material

A technology for lithium ion batteries and negative electrode materials, applied in battery electrodes, active material electrodes, negative electrodes, etc., can solve the problems of battery volume waste, excessively large hollow structure pore size, and difficult to control carbon coating, and achieve low production costs. , the effect of simple preparation process

Active Publication Date: 2022-05-17
HARBIN INST OF TECH
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

However, at present, most of the reported carbon-coated hollow structure metal oxides usually involve difficult control of carbon coating, and the size of the hollow structure pores is too large, which will greatly increase the cost and cause waste of battery volume, which violates the lithium The demand for the development of ion batteries in the direction of small size

Method used

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  • Preparation method of an ordered mesoporous metal oxide@carbon lithium-ion battery anode material
  • Preparation method of an ordered mesoporous metal oxide@carbon lithium-ion battery anode material
  • Preparation method of an ordered mesoporous metal oxide@carbon lithium-ion battery anode material

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Embodiment 1

[0032] Example 1, an ordered mesoporous SnO in this example 2 The preparation method of @C lithium-ion battery negative electrode material is characterized in that said preparation method is carried out according to the following steps:

[0033] Step 1. Dissolve 18g of ferric oleate in 100ml of 1-octadecene (ODE) in a three-necked flask, disperse evenly by ultrasonic (ultrasonic frequency 20KHz) for 30min, add 2000ul of oleic acid, place in a heating mantle, and stir at 500rpm for 10min ;

[0034] Step 2. Set the heating mantle at 5°C min -1 Heat to 320°C and keep it warm for 45 minutes;

[0035] Step 3. Wash the product of step 2 with water to remove the by-product NaCl, wash with acetone and n-hexane with a volume ratio of 1:1, and centrifuge three times at a speed of 10500 rpm to obtain monodisperse Fe 3 o 4 nanoparticles;

[0036] Step 4, the above obtained Fe 3 o 4 Nanoparticles are dispersed in n-hexane again, ultrasonic (ultrasonic frequency 20KHz) for 10min, pla...

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Abstract

A method for preparing an ordered mesoporous metal oxide@carbon lithium-ion battery negative electrode material belongs to the field of preparation of lithium-ion battery negative electrode materials. The present invention will solve existing SnO 2 The cycle stability and rate performance of base anode materials are poor. The method of the present invention: 1. using ferric oleate as a raw material, through temperature-programmed treatment, to obtain monodispersed oleic acid-coated iron ferric oxide nanoparticles; 2. then dissolving in an organic solvent, and standing at room temperature after ultrasound Obtain self-assembled NPs; 3. Dissolve the tin source in ethanol, slowly drop into the assembled NPs, and mechanically stir; 4. Wash with alcohol, dry, calcinate in an inert atmosphere, grind, etch, wash with water, and dry . SnO of the present invention 2 The @C anode material exhibits good cycle stability and rate performance; it can reach 730mAh g at 0.2C for 180 cycles –1 The capacity; when it returns to 0.2C after a large current cycle, the capacity still has no attenuation.

Description

technical field [0001] The invention belongs to the field of preparation of lithium-ion battery negative electrode materials; in particular, it relates to a preparation method of an ordered mesoporous metal oxide@carbon lithium-ion battery negative electrode material. Background technique [0002] Lithium-ion batteries have been widely used in consumer electronics, such as laptop computers and electric vehicles, due to their high energy density, environmental friendliness, and low self-discharge rate. [0003] Electrode materials are the key factors restricting the performance of lithium-ion batteries, and negative electrode materials are an important part of lithium-ion batteries. The current commercial anode materials are mainly graphite materials. Due to the low specific capacity and unstable structure of graphite materials, it is easy to cause co-intercalation of solvents, resulting in a sharp decline in performance. Metal oxides have become a research hotspot due to t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/485H01M4/62H01M10/0525
CPCH01M4/485H01M4/625H01M10/0525H01M2004/027Y02E60/10
Inventor 黄小萧刘冬冬卫增岩刘力铭闫旭
Owner HARBIN INST OF TECH
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