Preparation method of NiO/MgO/C composite negative electrode material of lithium ion battery

A technology of lithium-ion batteries and negative electrode materials, applied in the direction of battery electrodes, nanotechnology for materials and surface science, negative electrodes, etc., can solve problems such as low specific capacity, improve electrical conductivity, improve long-term cycle performance and external The effect of stability and lithium storage characteristics

Active Publication Date: 2017-11-21
SHANDONG UNIV OF TECH +1
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AI Technical Summary

Problems solved by technology

Although Mg doping can effectively improve the cycle performance of NiO, it has been less studied recently due to its low specific capacity.

Method used

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  • Preparation method of NiO/MgO/C composite negative electrode material of lithium ion battery
  • Preparation method of NiO/MgO/C composite negative electrode material of lithium ion battery
  • Preparation method of NiO/MgO/C composite negative electrode material of lithium ion battery

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Embodiment 1

[0045] (1) Preparation of nano Ni(OH) 2 / Mg(OH) 2

[0046] 5.8gNi(NO 3 ) 2 ·6H 2 O and 2.38gMg(NO 3 ) 2 ·6H 2 O and 5.4 g of urea were dissolved in deionized water, the molar concentration of Ni was 0.1 mol / L, and stirred with a magnetic stirrer at room temperature until a homogeneous solution was obtained. Transfer this solution to a polytetrafluoroethylene reactor at 160°C for 6 hours, wash the obtained precipitate with deionized water and absolute ethanol, and then dry it at 60°C for 4 hours to obtain Ni(OH) 2 / Mg(OH) 2 .

[0047] (2) Preparation of NiO / MgO / C composite anode materials

[0048] Weigh 0.6g of Ni(OH) 2 / Mg(OH) 2 , added to 200ml of glucose aqueous solution with a concentration of 0.05mol / L to form a suspension, stirred at room temperature for 3 hours, transferred the suspension to a homogeneous reactor in a polytetrafluoroethylene reactor, and reacted at 180°C for 4 hours, The solid product was obtained and dried at 60°C for 24h, then calcined at ...

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Abstract

The invention belongs to the technical field of a battery, and specifically relates to a preparation method of a NiO/MgO/C composite negative electrode material of a lithium ion battery. Nanometer Ni(OH)<2>/Mg(OH)<2> is prepared by adopting a hydrothermal method firstly; and then glucose is taken as a carbon source to perform hydrothermal coating on Ni(OH)<2>/Mg(OH)<2>. By virtue of the prepared NiO/MgO/C composite negative electrode material, NiO agglomeration in charging and discharging of the lithium ion battery can be prevented while the electrochemical performance of the negative electrode of the lithium ion battery can be improved.

Description

technical field [0001] The invention belongs to the technical field of batteries, and in particular relates to a method for preparing a NiO / MgO / C composite negative electrode material for a lithium ion battery. Background technique [0002] Nano-nickel oxide (NiO) can undergo reversible oxidation-reduction reactions with lithium metal, and still maintain a high specific capacity and excellent cycle performance after multiple charge-discharge cycles, making it a new type of lithium ion with good development prospects. Battery negative electrode material. In recent years, domestic and foreign research on NiO anode materials has been involved and some achievements have been made, but the progress is relatively slow. [0003] The preparation methods of nano-NiO powder mainly include chemical precipitation method, sol-gel method, and hydrothermal synthesis method. Nano-NiO powder prepared by different methods has different structures, grain sizes and electrochemical properties. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/52H01M4/62H01M10/0525B82Y30/00
CPCB82Y30/00H01M4/366H01M4/52H01M4/62H01M4/625H01M10/0525H01M2004/021H01M2004/027Y02E60/10
Inventor 张丽鹏张小杰于作洋张宇飞李国敏张君楠
Owner SHANDONG UNIV OF TECH
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