Preparation method and applications of nickel cobaltate

A technology of nickel cobaltate and nickel salt, which is applied in chemical instruments and methods, nickel compounds, inorganic chemistry, etc., can solve the problems of poor rate characteristics of structural materials, and achieve the effect of solving poor rate characteristics and significant technological progress

Inactive Publication Date: 2018-12-04
SHANGHAI INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] Aiming at the above-mentioned technical problems in the prior art, the present invention provides a kind of preparation method and application of nickel cobaltate, and the preparation method...

Method used

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  • Preparation method and applications of nickel cobaltate
  • Preparation method and applications of nickel cobaltate
  • Preparation method and applications of nickel cobaltate

Examples

Experimental program
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Effect test

Embodiment 1

[0033] Get 0.5821g nickel nitrate (Ni(NO 3 ) 2 ·6H 2 O, analytically pure, Sinopharm Chemical Reagent Company), 1.1641g cobalt nitrate (Co(NO 3 ) 2 ·6H 2 O, analytically pure, Sinopharm Chemical Reagent Company), 0.8411g hexamethylenetetramine (C 6 h 12 N 4 , analytically pure, Sinopharm Chemical Reagent Company) was added to 60ml deionized water, wherein Ni(NO 3 ) 2 :Co(NO 3 ) 2 :C 6 h 12 N 4 : The molar ratio of deionized water is 1:2:3:266.67, and the whole adding process is carried out under magnetic stirring (81-2 type, Shanghai Sile Instrument Co., Ltd.). After stirring for 40min, the entire mixed solution was moved into a polytetrafluoroethylene-lined autoclave (100ml, Zhengxin Instrument Factory), the filling degree was 60%, and it was reacted at a certain temperature (100° C.) for 6h, then naturally cooled. get the reaction solution;

[0034]Centrifuge the above reaction solution, control the centrifugation speed to 3300r / min, and the time is 20min. The...

Embodiment 2

[0038] Get 0.5821g nickel nitrate (Ni(NO 3 ) 2 ·6H 2 O, analytically pure, Sinopharm Chemical Reagent Company), 1.1641g cobalt nitrate (Co(NO 3 ) 2 ·6H 2 O, analytically pure, Sinopharm Chemical Reagent Company), 0.8411g hexamethylenetetramine (C 6 h 12 N 4 , analytically pure, Sinopharm Chemical Reagent Company) was added to 75ml deionized water, wherein Ni(NO 3 ) 2 :Co(NO 3 ) 2 :C 6 h 12 N 4 : The molar ratio of deionized water is 1:2:3:333.34, and the whole adding process is carried out under magnetic stirring (81-2 type, Shanghai Sile Instrument Co., Ltd.). After stirring for 40min, the whole mixed solution was moved into a polytetrafluoroethylene-lined autoclave (100ml, Zhengxin Instrument Factory), the filling degree was 75%, and reacted at a certain temperature (100°C) for 6h, then cooled naturally, get the reaction solution;

[0039] Centrifuge the above reaction solution, control the centrifugation speed to 3300r / min, and the time is 20min. The obtained...

Embodiment 3

[0043] Get 0.5821g nickel nitrate (Ni(NO 3 ) 2 ·6H 2 O, analytically pure, Sinopharm Chemical Reagent Company), 1.1641g cobalt nitrate (Co(NO 3 ) 2 ·6H 2 O, analytically pure, Sinopharm Chemical Reagent Company), 0.8411g hexamethylenetetramine (C 6 h 12 N 4 , analytically pure, Sinopharm Chemical Reagent Company) was added to 70ml deionized water, wherein Ni(NO 3 ) 2 :Co(NO 3 ) 2 :C 6 h 12 N 4 : The molar ratio of deionized water is 1:2:3:311.12, and the whole adding process is carried out under magnetic stirring (81-2 type, Shanghai Sile Instrument Co., Ltd.). After stirring for 40min, the entire mixed solution was moved into a polytetrafluoroethylene-lined autoclave (100ml, Zhengxin Instrument Factory), the filling degree was 70%, and it was reacted at a certain temperature (120° C.) for 7h, then naturally cooled. get the reaction solution;

[0044] Centrifuge the above reaction solution, control the centrifugation speed to 3300r / min, and the time is 20min. Th...

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Abstract

The invention discloses a preparation method of nickel cobaltate. The preparation method comprises following steps: at a stoichiometric ratio, a nickel salt, a cobalt salt, a precipitating agent, anddeionized water are mixed; an obtained mixed solution is introduced into a reaction kettle, reaction temperature is controlled to be 100 to 125 DEG C for 6 to 8 h, and washing and drying are carried out so as to obtain a powdery mixed precursor; the powdery mixed precursor is subjected to heat treatment in the air so as to obtain the NiCo2O4 material. The NiCo2O4 material can be used for preparation of lithium ion battery anodes, and increasing of lithium battery rate capability.

Description

technical field [0001] The invention belongs to the field of chemical industry and relates to a negative electrode material for a lithium ion battery, in particular to a preparation method and application of nickel cobaltate. Background technique [0002] In the past ten years, lithium-ion batteries have been widely used in the field of mobile electronic terminal equipment due to their high performance advantages. Transition metal oxides have attracted some attention due to their advantages such as high specific capacity. Especially NiCo 2 o 4 , was identified as the most promising candidate for next-generation Li-ion electrodes, considering its ultrahigh theoretical capacity, excellent redox activity, and high specific capacity [1]. NiCo 2 o 4 The electrode material structure is nanometerized to improve its lithium storage performance, and a special structure is proposed to provide more specific surface area, provide a channel for lithium ions to be well deintercalated...

Claims

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Application Information

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IPC IPC(8): H01M4/525H01M10/0525H01M4/58C01G53/00
CPCC01G53/00H01M4/525H01M4/58H01M10/0525Y02E60/10
Inventor 刘艳董经纬张登科席玉坤
Owner SHANGHAI INST OF TECH
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