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Lithium-ion battery NiCrxOy negative electrode material and preparation method thereof

A technology of lithium-ion batteries and negative electrode materials, which is applied in the field of electrochemical power sources, can solve the problems of unreported electrochemical performance, and achieve the effects of easy operation, high material capacity and good cycle performance

Active Publication Date: 2016-05-11
CHINA THREE GORGES UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

NiCr x o y The theoretical capacity is greater than 900mAh / g, but the research on its electrochemical performance has not been reported yet

Method used

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  • Lithium-ion battery NiCrxOy negative electrode material and preparation method thereof
  • Lithium-ion battery NiCrxOy negative electrode material and preparation method thereof
  • Lithium-ion battery NiCrxOy negative electrode material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Weigh nickel nitrate, chromium nitrate nonahydrate and hexamethylenetetramine in a molar ratio of 1:1:2 to accurately weigh the drug, put it in a beaker, add 40ml of distilled water and stir evenly, then transfer to a hydrothermal reaction kettle at 160°C After reacting for 24 hours, the reaction product was centrifuged and washed three times alternately with deionized water and ethanol, and then transferred to a petri dish for drying. Place the dried precursor in a crucible or a quartz boat, and move the crucible or quartz boat into a high-temperature tube furnace, calcinate at 450°C for 9 hours in the air, and naturally cool to obtain NiCrO 3 sample. The results showed that the prepared samples were analyzed by XRD patterns ( figure 1 ) analyzed as NiCrO 3 , corresponding to the XRD card JCPDS, No. 22-0748. In addition, there are heterogeneous NiCr 2 o 4 exists, corresponding to the XRD card JCPDS, No. 54-0961.

Embodiment 2

[0032] Weigh nickel nitrate, chromium nitrate nonahydrate and hexamethylenetetramine in a molar ratio of 1:2:3 to accurately weigh the drug, put it in a beaker, add 40ml of distilled water and stir evenly, then transfer it to a hydrothermal reaction kettle at 100°C After reacting for 12 hours, the reaction product was washed by centrifugation, washed alternately with deionized water and ethanol three times, and then transferred to a petri dish for drying. Place the dried precursor product in a crucible or a quartz material boat, and move the crucible or quartz boat into a high-temperature tube furnace, calcinate at 500°C for 5 hours in air, and naturally cool to obtain NiCrO 3 sample. through figure 2 XRD results analysis showed that the prepared samples were pure NiCrO 3 , corresponding to the XRD card JCPDS, No. 22-0748. at 24.6 o , 33.8 o , 36.4 o 、40 o , 41.8 o , 44.5 o , 50.6 o , 55.2 o , 58.8 o , 63.9 o , 65.6 o and 73.5 o The diffraction peaks correspond...

Embodiment 3

[0034] Weigh nickel nitrate, chromium nitrate nonahydrate and hexamethylenetetramine in a molar ratio of 1:3:5 to accurately weigh the drug, put it in a beaker, add 40ml of distilled water and stir evenly, then transfer it to a hydrothermal reaction kettle at 200°C After reacting for 48 hours, the reaction product was washed by centrifugation, washed alternately with deionized water and ethanol three times, and then transferred to a petri dish for drying. Place the dried product obtained in a crucible or a quartz material boat, and move the crucible or quartz boat into a high-temperature tube furnace, calcinate at 550°C for 3 hours in the air, and naturally cool to obtain NiCrO 3 sample. The results showed that the prepared samples were analyzed by XRD patterns ( Figure 5 ) analyzed as NiCrO 3 , corresponding to the XRD card JCPDS, No. 22-0748. It can be seen from the XRD spectrum that there is a small amount of NiO impurities, corresponding to the XRD card JCPDS, No.73-15...

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Abstract

The invention relates to a lithium-ion battery NiCrxOy negative electrode material, which comprises NiCrO3 and NiCr2O4, has a spinel structure, is a particle material, and has an average particle size of 100-200 nm. According to the present invention, nickel acetate or nickel nitrate is adopted as a nickel source, chromium nitrate nonahydrate is adopted as a chromium source, a hydrothermal method is used under the condition of a hexamethylenetetramine solvent to prepare a mixed material, the mixed material is dried, and the dried mixed material is subjected to high temperature sintering to obtain the lithium-ion battery NiCrO3 and NiCr2O4 negative electrode material; the preparation method has beneficial effects of simple synthesis process, easy operation, and low material preparation cost; the obtained sample has characteristics of high purity and good crystallinity; the prepared sample is granular, and has a particle size of about 100-200 nm; and the prepared material has characteristics of high capacity and good cycle property.

Description

technical field [0001] The invention relates to a novel lithium-ion battery negative electrode material and a preparation method thereof, in particular to a ternary chromium oxide NiCr x o y The preparation method belongs to the field of electrochemical power supply. Background technique [0002] As a national strategic resource, energy is an important material basis for domestic economic growth and social development. With the rapid development of the economy and the substantial improvement of people's living standards, people have to face the dual pressures of energy crisis and environmental pollution while enjoying the great convenience brought by energy consumption. The development of green and clean energy has become urgent . Lithium-ion battery is the third generation of small storage battery after nickel-cadmium battery and nickel-hydrogen battery. It has high working voltage, high specific capacity, large specific power, stable charge and discharge potential curve...

Claims

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Application Information

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IPC IPC(8): H01M4/52
CPCY02E60/10
Inventor 倪世兵马建军吕小虎杨学林
Owner CHINA THREE GORGES UNIV
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