Nano microsphere niobium-based composite oxide and preparation method thereof

A composite oxide, nano-microsphere technology, applied in nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve the problems of negative impact on cycle performance, large specific surface area of ​​materials, poor processing performance, etc. , to achieve the effect of short electronic conduction path, high capacity and good processing performance

Active Publication Date: 2016-02-10
RISESUN MENGGULI NEW ENERGY SCIENCE & TECHNOLOGY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Li 4 Ti 5 o 12 The shortcoming is that its capacity is low, so it is imperative to find a high-capacity, high-power, high-safety lithium-ion battery anode material
But at the same time, nano materials have a large specific surface area, and there are many active points for side reactions with the electrolyte, which has a negative impact on cycle performance and poor processing performance.

Method used

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  • Nano microsphere niobium-based composite oxide and preparation method thereof
  • Nano microsphere niobium-based composite oxide and preparation method thereof
  • Nano microsphere niobium-based composite oxide and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] TiNb 1.98 Zr 0.02 o 7 ——0.1C

[0040] according to figure 1 As shown in the process flow, 50nm anatase titanium dioxide, 50nm niobium hydroxide and zirconium hydroxide are first selected as raw materials, and the molar ratio Ti:Nb:Zr=1:1.98:0.02 is used as ingredients, and at the same time, 1 wt% of the solid material mass is added. Sodium methyl cellulose is used as a binder, and absolute ethanol is used as a dispersant. After mixing, the solid content of the slurry is 50wt (mass)%. After mixing and ball milling, spray granulation under the condition that the inlet temperature of the hot air nozzle is 150°C , where the slurry inlet velocity is 20ml / min and the gas inlet velocity is 30m 3 / h, the outlet temperature is 80°C, and the precursor of niobium-titanium composite nanospheres is obtained, which is placed in a muffle furnace and blown with air. TiNb 1.98 Zr 0.02 o 7 matrix. Then choose glucose as the carbon source of the coating agent, according to the sy...

Embodiment 2

[0042] TiNb 1.97 Mg 0.03 o 7 ——0.1TiO 2

[0043] according to figure 1 As shown in the process flow, 100nm anatase titanium dioxide, 80nm niobium oxide, and magnesium hydroxide are first selected as raw materials, and the molar ratio of Ti:Nb:Mg=1:1.97:0.03 is used as ingredients, and at the same time, 2 wt% of the solid material is added. Glycol is the binder, and absolute ethanol is the dispersant. After mixing, the solid content of the slurry is 60wt%. After ball milling, the inlet temperature of the hot air nozzle is 180°C and the spray granulation is performed, wherein the slurry inlet flow rate is 15ml. / min, the gas inlet velocity is 30m 3 / h, the outlet temperature is 130°C, and the precursor of niobium-titanium composite nanospheres is obtained, which is placed in a muffle furnace and blown with air. TiNb 1.97 Mg 0.03 o 7 matrix. Then choose amorphous titanium dioxide as the coating agent, according to the synthesis target product TiNb 1.97 Mg 0.03 o 7 :T...

Embodiment 3

[0045] TiNb 1.99 Al 0.01 o 7 ——0.1ZrO 2

[0046] according to figure 1 The process flow shown, first selects 20nm metatitanic acid, 10nm niobium oxalate, and aluminum hydroxide as raw materials, according to the molar ratio of Ti:Nb:Al=1:1.99:0.01 ingredients, and simultaneously adds 3 wt% of the solid material mass of glucose as a viscous Binder, absolute ethanol is the dispersant, the solid content of the slurry after mixing is 40wt%, after ball milling, the inlet temperature of the hot air nozzle is spray granulation under the condition of 130 ℃, wherein, the slurry inlet flow rate is 15ml / min, the gas The inlet velocity is 30m 3 / h, the outlet temperature is 90°C, and the precursor of niobium-titanium composite nanospheres is obtained, which is placed in a muffle furnace and blown with air. TiNb 1.99 Al 0.01 o 7 matrix. Then choose zirconium hydroxide as the coating agent, according to the synthesis target product TiNb 1.99 Al 0.01 o 7 : ZrO 2 (mol%)=1:0.1 We...

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Abstract

The invention provides a nano microsphere niobium-based composite oxide used in lithium ion battery cathode materials and a preparation method of same. The niobium-based composite oxide has the following general formula: TiNb<2-x>M<x>O<7>-nN, wherein M is one or more selected from Zr, Mg, Al, Y, Ce and V; the N is one or more selected from TiO2, ZrO2, MgO, C, Al2O3, CeO2, Y2O3, Nd2O3, ZnO2, Nb2O5 and V2O5; 0 <= x <= 0.1 and 0 < n <= 0.1. Compared with the prior art, the TiNb<2-x>M<x>O<7>-nN has the advantages of both nano materials and micron materials and has excellent processing property. After doping and coating, a synthetic material is high in gram capacity and is excellent in cycle performance. The composite oxide is prepared from low-cost raw materials, is simple in producing process and is suitable for industrial production.

Description

technical field [0001] The invention belongs to the field of energy technology, and relates to a lithium ion battery negative electrode material and its preparation, in particular to a lithium ion battery negative electrode material niobium-based composite oxide nano-microsphere and a preparation method thereof. Background technique [0002] Due to the increasing shortage of energy and people's higher and higher requirements on the environment, the use of hybrid electric vehicles or electric vehicles has a very broad prospect. Vehicle power supply requires that lithium batteries must have the characteristics of fast charging and discharging and long-term safety and reliability. At present, carbon anode materials in lithium-ion battery anode materials have been widely commercialized, and their potential is higher than lithium intercalation (1.55VLi + Li of / Li) 4 Ti 5 o 12 Materials, which have good safety performance and long life, make it gradually commercialized in the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/485B82Y30/00B82Y40/00
CPCY02E60/10
Inventor 王兴勤高云刘建红吴宁宁
Owner RISESUN MENGGULI NEW ENERGY SCIENCE & TECHNOLOGY CO LTD
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