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Nano Ni (OH)2@C composite material and preparation method

A composite material and nanotechnology, applied in the field of nanocomposite materials and electrochemistry, can solve problems such as high cost and complicated preparation methods, and achieve the effect of shortening charging time and increasing specific capacity

Active Publication Date: 2017-02-22
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] (2) The preparation method is complex and the cost is relatively high

Method used

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  • Nano Ni (OH)2@C composite material and preparation method
  • Nano Ni (OH)2@C composite material and preparation method
  • Nano Ni (OH)2@C composite material and preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] according to figure 1 The process route of the present embodiment is as follows:

[0042] 1. Preparation of Carbon Supports

[0043] Weigh 3g of polyvinylidene chloride (PVDC) and 10g of NaOH by ball milling in a ball mill at 60 rpm for 6 hours. The resulting solid mixture was calcined at 600°C for 3 h in a nitrogen atmosphere to obtain a porous carbon crude product, and then sequentially washed with 1 mol L -1 dilute hydrochloric acid and deionized water, and finally vacuum-dried at 120 °C for 3 h to obtain a porous carbon sample. 2. Nano Ni(OH) 2 Preparation of @C composite materials

[0044] First configure 80mL containing 0.2mol L -1 NaClO and 1.2mol L -1 The oxygen-enriched nickel ion solution of nickel sulfate is standby for solution A, configure 50ml of 1mol L -1 Aqueous ammonia is used as solution B, and 20ml of a mixed solution containing 4mol / L NaOH and 2.4mol / L ammonia is prepared as solution C for subsequent use.

[0045] (1) Electrochemical precipit...

Embodiment 2

[0051] according to figure 1The process route, the implementation process of this example is as follows:

[0052] 1. Preparation of Carbon Supports

[0053] Weigh 3g of polyvinyl fluoride and 10g of KOH by ball milling in a ball mill at 50 rpm for 8 hours. The obtained solid mixture was calcined at 350°C for 7h in a nitrogen atmosphere to obtain a porous carbon crude product, and then sequentially washed with 1mol L -1 dilute nitric acid and deionized water, and finally vacuum-dried at 100 °C for 5 h to obtain a porous carbon sample.

[0054] 2. Nano Ni(OH) 2 Preparation of @C composite materials

[0055] First configure 80mL containing 0.3mol L -1 H 2 o 2 and 1.2mol L -1 The oxygen-enriched nickel ion solution of nickel sulfate is standby for solution A, configure 35ml of 1.5mol L -1 The ammonium sulfate was used as solution B for later use, and 20 ml of a mixed solution containing 2.4 mol / L LiOH and 1.5 mol / L ethylenediamine was prepared as solution C for later use....

Embodiment 3

[0062] according to figure 1 The process route, the implementation process of this example is as follows:

[0063] 1. Preparation of Carbon Supports

[0064] Weigh 2.5g of polyvinylidene chloride (PVDC) and 8g of NaOH by ball milling in a ball mill at 60 rpm for 6 hours. The resulting solid mixture was calcined at 800°C for 2 h in a nitrogen atmosphere to obtain a crude porous carbon, and then sequentially washed with 1 mol L -1 dilute sulfuric acid and deionized water, and finally vacuum-dried at 150 °C for 2.5 h to obtain a porous carbon sample.

[0065] 2. Nano Ni(OH) 2 Preparation of @C composite materials

[0066] First configure 80mL containing 0.3mol L -1 CrO 3 and 1.1mol L -1 The oxygen-enriched nickel ion solution of nickel sulfate is standby for solution A, configure 65ml of 0.8mol L -1 The ethylamine solution is used as solution B for later use, and 20 ml of a mixed solution containing 4mol / L KOH and 2.4mol / L ammonia water is prepared as solution C for later...

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Abstract

The invention relates to a nano Ni (OH)2@C composite material and a preparation method and belongs to the nano composite material and electrochemistry field. According to the nano Ni (OH)2@C composite material, pores in porous carbon supports load Beta-Ni(OH)2 crystalline grains; and the pore diameter of the porous carbon supports ranges from 0.1 micron and 10 microns. The preparation method includes the following steps that: halogen-containing polymer reacts with alkali, an obtained product is cleaned and dried, so that porous carbon supports can be obtained; and the obtained porous carbon supports are arranged in an oxygen-rich nickel ion solution, electrochemical deposition and chemical deposition are carried out sequentially, so that Ni(OH)2 crystalline grains can be deposited in the porous carbon supports, and an obtained product is cleaned and dried, so that the nano Ni (OH)2@ C composite material can be obtained. According to the nano Ni (OH)2@ C composite material, the specific capacity and charge and discharge rate of a nickel hydroxide component can be improved, and the cycle life of the nickel hydroxide component can be prolonged.

Description

technical field [0001] The invention belongs to the field of nanocomposite materials and electrochemistry, and relates to a nano Ni(OH) 2 Composite materials of @C and their preparation technology Background technique [0002] With the pressure of global warming and environmental pollution brought about by the increasing consumption of fossil energy, new clean energy vehicles, especially electric vehicles, are considered to be clean vehicles to replace fuel vehicles in the future. There are three bottlenecks restricting the rapid development of electric vehicles: first, the energy storage density of current batteries or supercapacitors cannot meet the needs of long-distance driving; second, the inconvenience caused by the long waiting time for charging; Therefore, the development of high-performance and safe secondary batteries and supercapacitors is considered to be the key to the realization of electric vehicles. [0003] Nickel hydroxide and its layered structure and fa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/32H01G11/30H01G11/24H01G11/86
CPCY02E60/13H01G11/32H01G11/24H01G11/30H01G11/86
Inventor 潘军青杨会先乜雅婧孙艳芝
Owner BEIJING UNIV OF CHEM TECH
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