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A kind of preparation method of double metal oxide composite negative electrode material with multi-level structure

A bimetallic oxide and negative electrode material technology, applied in the field of lithium ion batteries, can solve the problem of low reversible lithium storage capacity, and achieve the effects of excellent rate performance, improved electrochemical performance, and stable structure

Active Publication Date: 2020-06-30
ANHUI UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the actual reversible lithium storage capacity of such materials is much lower than the theoretical capacity, such as Co 3 o 4 The reversible mass specific capacity of the negative electrode material after 50 cycles is only 300-400mAh / g, so the transition metal oxide negative electrode material cannot well meet the social demand for high-capacity, long-life negative electrode materials

Method used

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  • A kind of preparation method of double metal oxide composite negative electrode material with multi-level structure
  • A kind of preparation method of double metal oxide composite negative electrode material with multi-level structure

Examples

Experimental program
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Embodiment 1

[0021] 1mmol Ni(NO 3 ) 2 ·6H 2 O, 2mmol Co(NO 3 ) 2 ·6H 2 O, 3mmol NH 4 Dissolve F and 5mmol of urea in 70mL of deionized water, stir for 1h, transfer to a 100mL polytetrafluoroethylene reactor and add an appropriate amount of nickel foam (14mm in diameter, 1mm in thickness, 120PPI in diameter), and then react in an oven at 120°C 12h. After cooling to room temperature, filter, wash and dry, then transfer to a tube furnace under N 2 Continuous heat treatment at 600 °C for 2 h under atmosphere to obtain NiCoO grown on nickel foam 2 -Co 3 o 4 Bimetallic anode materials. Then NiCoO grown on nickel foam 2 -Co 3 o 4 Place the bimetallic negative electrode material in a small beaker, then add 50mL of 0.1g / L sodium dodecylsulfonate aqueous solution, and sonicate for 9 minutes, then mechanically stir for 10h, then add 0.035mL of pyrrole, 0.5mL of 1mol· L -1 Hydrochloric acid solution and 0.114g of oxidizing agent (NH 4 ) 2 S 2 o 8 , and at the same time stirred in an...

Embodiment 2

[0023] 1mmol Ni(NO 3 ) 2 ·6H 2 O, 2mmol Co(NO 3 ) 2 ·6H 2 O, 3mmol NH 4 F and 5mmol of urea were dissolved in 70mL of deionized water, stirred for 1h, transferred to a 100mL polytetrafluoroethylene reactor and an appropriate amount of nickel foam (120PPI) was added, and then reacted in an oven at 110°C for 10h. After cooling to room temperature, filter, wash and dry, then transfer to a tube furnace under N 2 Continuous heat treatment at 400°C for 5h under atmosphere to obtain NiCoO grown on foamed nickel (14mm in diameter, 1mm in thickness, 120PPI in pore size) 2 -Co 3 o 4 Bimetallic anode materials. Then NiCoO grown on nickel foam 2 -Co 3 o 4 Place the bimetallic negative electrode material in a small beaker, then add 70mL of 0.1g / L sodium dodecylsulfonate aqueous solution, and sonicate for 3 minutes, then mechanically stir for 15h, then add 0.03mL pyrrole, 0.43mL 1mol· L -1Hydrochloric acid solution and 0.1g of oxidizing agent (NH 4 ) 2 S 2 o 8 , and at the...

Embodiment 3

[0025] 1mmol Ni(NO 3 ) 2 ·6H 2 O, 2mmol Co(NO 3 ) 2 ·6H 2 O, 3mmol NH 4 F and 5mmol of urea were dissolved in 70mL of deionized water, stirred for 3h, transferred to a 100mL polytetrafluoroethylene reactor and an appropriate amount of nickel foam (120PPI) was added, and then reacted in an oven at 130°C for 10h. After cooling to room temperature, filter, wash and dry, then transfer to a tube furnace under N 2 Continuous heat treatment at 600°C for 1 h under atmosphere to obtain NiCoO grown on nickel foam (diameter 14mm, thickness 1mm, pore size 120PPI) 2 -Co 3 o 4 Bimetallic anode materials. Then NiCoO grown on nickel foam 2 -Co 3 o 4 Place the bimetallic negative electrode material in a small beaker, then add 60mL of 0.1g / L sodium dodecylsulfonate aqueous solution, and sonicate for 9 minutes, then mechanically stir for 10h, then add 0.15mL of pyrrole, 2.1mL of 1mol· L -1 Hydrochloric acid solution and 0.2g of oxidizing agent (NH 4 ) 2 S 2 o 8 . At the same t...

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Abstract

The invention discloses a method for preparing a double metal oxide negative electrode composite material with a multi-stage structure, and belongs to the technical field of lithium ion batteries. Themethod includes the following specific steps of dissolving nickel nitrate, cobalt nitrate, ammonium salt and amide into water, stirring, moving into a polytetrafluoroethylene reactor and adding appropriate amount of foam metal, reacting for 10-15 hours, cooling and drying, and then transferring to a tube furnace and carrying out heat treatment in an N2 atmosphere for 1-5 hours to obtain NiCoO2-Co3O4 grown on the foam metal, placing the NiCoO2-Co3O4 in a small beaker, adding an aqueous solution of a surfactant, ultrasonic processing, stirring, successively adding pyrrole, an acid solution andan oxidizing agent, washing after stirring in an ice water bath and drying to obtain a target product. The Co and Ni double metal oxide negative electrode composite material prepared by the method hasa uniform particle size, a stable and compact structure, considerable wide potential window reversible capacity, excellent rate performance and stable cycle life.

Description

technical field [0001] The invention belongs to the technical field of lithium ion batteries, and in particular relates to a double metal oxide negative electrode material for lithium ion batteries, in particular to a preparation method for a double metal oxide composite negative electrode material with a multi-level structure. Background technique [0002] Traditional fossil energy is facing the crisis of shortage or even depletion, and it has brought huge pressure to environmental protection. The new industrialization development direction of circular economy and low-carbon economy will promote the rapid development of new energy automobile industry. As a new generation of environmentally friendly and high-energy batteries, lithium-ion power batteries have become the mainstream product of power batteries for new energy vehicles. However, since the commercialization of lithium-ion batteries in the 1990s, positive electrode materials have been continuously introduced, while ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/36H01M4/525H01M4/62H01M10/0525B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00H01M4/362H01M4/525H01M4/62H01M10/0525Y02E60/10
Inventor 伊廷锋韩啸朱彦荣
Owner ANHUI UNIVERSITY OF TECHNOLOGY
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