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Silver loaded mesoporous silicon oxide coated ternary cathode material, and preparation method and applications thereof

A technology of positive electrode material and silicon oxide, which is applied in the field of silver-loaded mesoporous silicon oxide-coated ternary positive electrode material and its preparation, and can solve the problems such as difficulty in increasing the specific capacity.

Active Publication Date: 2017-04-19
SHANGHAI NAT ENG RES CENT FORNANOTECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the specific capacity of commercialized lithium-ion batteries and MH / Ni batteries has been difficult to continue to improve

Method used

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  • Silver loaded mesoporous silicon oxide coated ternary cathode material, and preparation method and applications thereof

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Experimental program
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Effect test

Embodiment 1

[0023] (1) Add lithium acetate, nickel acetate, cobalt acetate and manganese acetate into deionized water at a molar ratio of 0.01 mol:0.0033 mol :0.0033 mol :0.0033 mol and stir until the metal salts are completely dissolved; Mix the double chelating agent EDTA-CA with a small amount of deionized water to moisten, add ammonia water, shake until a colorless and transparent solution is formed, then add the colorless and transparent double chelating agent solution into the uniform medium of inorganic salts to form a blue-purple transparent solution, 70 ℃ heating and stirring until a blue-purple sol is formed; heating and stirring at 80 ℃ until a blue-purple sol is formed; the gel material is heated in a blast drying oven at 240 ℃ until a black porous xerogel is formed; the obtained black xerogel is ground into powder, calcined at 850 °C for 5 h in a muffle furnace to obtain LiNi 1 / 3 co 1 / 3 mn 1 / 3 o 2 .

[0024] (2) LiNi in step (1) 1 / 3 co 1 / 3 mn 1 / 3 o 2 The aqueous sol...

Embodiment 2

[0027] (1) Add lithium nitrate, nickel nitrate, cobalt nitrate and manganese nitrate into deionized water at a molar ratio of 0.01 mol: 0.005 mol: 0.003 mol: 0.002 mol and stir until the metal salts are completely dissolved; Mix the double chelating agent EDTA-PPA with a small amount of deionized water to moisten, add ammonia water, shake until a colorless and transparent solution is formed, then add the colorless and transparent double chelating agent solution into the uniform medium of inorganic salts to form a blue-purple transparent solution, 80 ℃ heating and stirring until a blue-purple sol is formed; heating and stirring at 80 ℃ until a blue-purple sol is formed; the gel material is heated in a blast drying oven at 240 ℃ until a black porous xerogel is formed; the obtained black xerogel is ground into powder, calcined at 850 °C for 5 h in a muffle furnace to obtain LiNi 0.5 co 0.3 mn 0.2 o 2 .

[0028] (2) LiNi in step (1) 0.5 co 0.3 mn 0.2 o 2 The aqueous soluti...

Embodiment 3

[0031] (1) Add lithium nitrate, nickel nitrate, cobalt nitrate and manganese nitrate into deionized water at a molar ratio of 0.01 mol: 0.008 mol: 0.001 mol: 0.001 mol and stir until the metal salts are completely dissolved; Mix the double chelating agent EDTA-PPA with a small amount of deionized water to moisten, add ammonia water, shake until a colorless and transparent solution is formed, then add the colorless and transparent double chelating agent solution into the uniform medium of inorganic salts to form a blue-purple transparent solution, 80 Heat and stir at 80°C until a blue-purple sol is formed; heat and stir at 80°C until a blue-purple sol is formed; heat the gel material in a blast drying oven at 240°C until a black porous xerogel is formed; grind the obtained black xerogel into powder, calcined at 850 °C for 5 h in a muffle furnace to obtain LiNi 0.8 co 0.1 mn 0.1 o 2 .

[0032] (2) LiNi in step (1) 0.8 co 0.1 mn 0.1 o 2 The aqueous solution was stirred at...

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Abstract

The invention relates to a silver loaded mesoporous silicon oxide coated ternary cathode material, and a preparation method and applications thereof. The preparation method comprises the following steps: dissolving lithium salts, nickel salts, cobalt salts, and manganese salts into a uniform medium, wetting the mixture by two chelating agents, adding ammonia liquor, adding a solution of two chelating agents into the inorganic salt uniform medium, heating the mixture under stirring to prepare dry gel; grinding the dry gel into powder, calcining the powder to obtain a ternary material; adding a water solution of the ternary material into tetraethyl orthosilicate, ethanol, and surfactant (cetyl trimethyl ammonium bromide), carrying out centrifugal precipitation, drying the precipitates, calcining the precipitates to obtain a silica-ternary shell-core cathode material; dissolving silver oxide into water to obtain a solution A; dissolving PVP into water to prepare a solution B; dropwise adding the solution B into the solution A to obtain a solution C; adding the silica-ternary shell-core cathode material into the solution C to obtain a solution D; dropwise adding a reducing agent into the solution D, and finally carrying out washing, suction filtration, and drying to obtain the final product. The preparation method is simple, the technological conditions are easy to realize, the energy consumption is low, and the preparation is pollution-free.

Description

technical field [0001] The invention relates to a preparation method of a lithium battery positive electrode material, in particular to a silver-loaded mesoporous silicon oxide-coated ternary positive electrode material and its preparation method and application. Background technique [0002] With the rapid development of smaller, lighter and higher-performance electronic and communication devices, people have put forward higher and higher requirements on the performance of the batteries that power these devices, especially the specific energy. However, the specific capacity of currently commercialized lithium-ion batteries and MH / Ni batteries has been difficult to continue to improve. Therefore, there is an urgent need to develop batteries with higher specific energy. As a high specific energy chemical power source, lithium-ion secondary batteries have been widely used in mobile communications, notebook computers, video cameras, cameras, portable instruments and other fiel...

Claims

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Application Information

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IPC IPC(8): H01M4/36H01M4/38H01M4/48H01M4/505H01M4/525H01M10/0525
CPCH01M4/366H01M4/38H01M4/483H01M4/505H01M4/525H01M10/0525Y02E60/10
Inventor 何丹农吴晓燕张春明段磊王严魏国栋金彩虹
Owner SHANGHAI NAT ENG RES CENT FORNANOTECH
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