Preparation method of doped spherical nanoscale Ni(OH)2

A nano and spherical technology, applied in the field of preparing spherical doped nano-Ni2, can solve the problem of irregular shape of doped nano-Ni

Inactive Publication Date: 2012-06-20
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the invention is in order to solve existing doped nano-Ni (OH) 2 The probl

Method used

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  • Preparation method of doped spherical nanoscale Ni(OH)2
  • Preparation method of doped spherical nanoscale Ni(OH)2
  • Preparation method of doped spherical nanoscale Ni(OH)2

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specific Embodiment approach 1

[0025] Specific implementation mode 1: This implementation mode is a spherical doped nano-Ni(OH) 2 The preparation method, it is realized by the following steps: one, by the mass ratio of n-hexanol and surfactant is the ratio of 2: 2~5, n-hexanol and surfactant are mixed to obtain mixed solution A, then to mixed solution Add alkanes or cycloalkanes to the mixture, and stir to obtain a mixed solution B, wherein the surfactant is octylphenyl polyoxyethylene ether, dioctyl sodium succinate and cetyltrimethylammonium bromide. One or a combination of several of them, the ratio of the volume of the added alkane or cycloalkane to the volume of the mixed solution A is 3 to 6:1, and the number of carbon atoms in the alkane or cycloalkane is 5 to 10; The solution C doped with metal ions and nickel ions is added to the mixed solution B obtained in step 1, and stirred to obtain a mixed solution D, wherein the doped metal ions are cobalt ions, zinc ions or aluminum ions, and the moles of d...

specific Embodiment approach 2

[0030] Embodiment 2: This embodiment differs from Embodiment 1 in that the number of carbon atoms in the alkane or cycloalkane in Step 1 is 5-8. Other steps and parameters are the same as those in Embodiment 1.

specific Embodiment approach 3

[0031] Embodiment 3: This embodiment differs from Embodiment 1 in that the number of carbon atoms in the alkane or cycloalkane in Step 1 is 6. Other steps and parameters are the same as those in Embodiment 1.

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Abstract

The invention relates to a preparation method of doped spherical nanoscale Ni(OH)2, which solves the problem that the existing doped spherical nanoscale Ni(OH)2 has irregular shape. The preparation method comprises the following steps: adding alkane or cycloalkane in the mixed solution of n-hexanol and surfactant; stirring uniformly; adding a solution doped with metal ions and Ni<2+>, and stirring uniformly; adding an alkaline solution dropwise to adjust pH value to 8 to 11; separating precipitate; washing; calcining; and milling to obtain the final product. The nanoscale Ni(OH)2 prepared by the method has a spherical or nearly spherical shape, and a beta-type crystal form. The maximum 1C discharge specific capacity of a Cd-Ni (cadmium-nickel) battery prepared from Co-doped spherical nanoscale Ni(OH)2 reaches 245 mAh/g, which is improved by 16% in comparison with that of Cd-Ni battery prepared from doped nonspherical nanoscale Ni(OH)2, and the cycle specific capacity is also improved remarkably. The discharge specific capacities of Zn-doped spherical nanoscale Ni(OH)2 and Al-doped spherical nanoscale Ni(OH)2 are also improved.

Description

technical field [0001] The invention relates to a method for preparing spherical doped nano Ni(OH) 2 Methods. Background technique [0002] With the rapid development of the electronic information industry, electronic products tend to be more complex in function, smaller in size, and lighter in weight, which puts forward higher requirements for batteries that provide power. Performance, but also should have the characteristics of low cost and good stability. At the same time, with the increasing demand for hybrid electric vehicles and electric vehicles, the demand for power batteries is also increasing. MH / Ni battery is an alkaline storage battery with nickel hydroxide material as the positive electrode, metal hydride as the negative electrode, and alkaline aqueous solution as the electrolyte. It has significant advantages such as high mass-to-capacity, fast charging, no memory effect, low pollution, and long life. It is known as "green battery" in the battery industry. ...

Claims

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Application Information

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IPC IPC(8): H01M4/52H01M4/32C01G53/04B82Y40/00
CPCY02E60/124Y02E60/10
Inventor 赵力刘志豪盛军林剑斌
Owner HARBIN INST OF TECH
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