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High-conductivity cobalt hydroxide electrode material, preparation method thereof, electrode and capacitor

A cobalt hydroxide, electrode material technology, applied in cobalt oxide/cobalt hydroxide, hybrid capacitor electrodes, nanotechnology for materials and surface science, etc., can solve complex processes, cumbersome cobalt hydroxide material methods, electrical properties Poor and other problems, to achieve the effect of improving electrical conductivity

Inactive Publication Date: 2020-01-10
SHENZHEN POLYTECHNIC
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The technical problem to be solved by the present invention is: provide a kind of highly conductive cobalt hydroxide electrode material, its preparation method and a kind of electrode and capacitor, solve that the existing method for preparing cobalt hydroxide material is relatively loaded down with trivial details, the process is complicated, and electrical property is poor The problem

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  • High-conductivity cobalt hydroxide electrode material, preparation method thereof, electrode and capacitor
  • High-conductivity cobalt hydroxide electrode material, preparation method thereof, electrode and capacitor
  • High-conductivity cobalt hydroxide electrode material, preparation method thereof, electrode and capacitor

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preparation example Construction

[0050] The embodiment of the present invention provides a method for preparing cobalt hydroxide with outstanding electrical conductivity by reacting in a buffer system, comprising the following process steps:

[0051] Step 1, preparing an alkaline buffer solution, specifically mixing an alkaline agent and an ammonia salt precursor to prepare an alkaline buffer solution.

[0052] In step 1, the ammonium salt precursor and the alkaline agent are mixed in a molar mass ratio of (0.4-1.6): 1, and 40-80ml of deionized water is added, and fully stirred at room temperature for 10-30 minutes to obtain the alkali neutral buffer solution;

[0053] Among them, the ammonia salt precursor can be (NH 4 ) 2 SO 4 or NH 4 One or a mixture of Cl; the alkaline agent is one or a mixture of NaOH or KOH;

[0054] Preferably, the molar mass ratio of the ammonia salt precursor to the alkaline agent is (1.2-1.3):1;

[0055] In a specific embodiment, the mixing time of the ammonia salt precursor and...

Embodiment 1

[0079] Take 60ml of deionized water, then weigh the drug according to the molar mass ratio of the ammonia salt precursor and the alkaline agent at a ratio of 1.2:1, add the ammonia salt precursor and the alkaline agent and stir and mix; stir at room temperature for 30min Finally, a buffer solution is formed for use; then, according to the ratio of the molar mass ratio of the cobalt salt precursor and the alkaline agent to 0.25:1, the cobalt salt precursor is weighed and added to the buffer solution, and stirred at room temperature for 5 minutes, and the obtained The mixture was subjected to a subsequent reaction under vacuum conditions. First, it was vacuumed, and then its temperature was set to 45 ° C. After 12 hours of heat preservation, it was naturally cooled to room temperature. Washing with ethanol for 3 times and drying can obtain the highly conductive cobalt hydroxide electrode material. Then press it with conductive carbon black and polytetrafluoroethylene according t...

Embodiment 2

[0083] The raw materials used in this embodiment, preparation steps and processing conditions are all the same as in Example 1, and the test conditions and instruments used for this experimental result are also the same as in Example 1. The setting temperature is 40°C, and the holding time is 10h, and the temperature of the raw materials is changed. The molar mass ratio means that the high conductivity cobalt hydroxide electrode material is prepared according to the molar mass ratio of the ammonia salt precursor and the alkaline agent as 1:1.

[0084] Test the AC impedance curve of the cobalt hydroxide electrode material of the present embodiment according to the test condition identical with embodiment 1, its result is as follows figure 2 shown. According to the trend of the curve, it can be seen that the spectral line in the low frequency region of the electrode material prepared at this ratio is still close to the vertical real axis, indicating that its capacitor performan...

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Abstract

The invention discloses a high-conductivity cobalt hydroxide electrode material, a preparation method thereof, an electrode and a capacitor. The preparation method of the high-conductivity cobalt hydroxide electrode material comprises the steps of 1, preparing an alkaline buffer solution, specifically, mixing an alkaline agent and an ammonia salt precursor to prepare the alkaline buffer solution;2, preparing a cobalt salt precursor alkaline reaction system, specifically, adding a cobalt salt precursor into the prepared alkaline buffer agent, and uniformly stirring; and 3, carrying out a chemical reaction by the reaction system to obtain the cobalt hydroxide electrode material.

Description

technical field [0001] The invention mainly relates to the field of electrode materials and preparation methods thereof, in particular to a high-conductivity cobalt hydroxide electrode material, a preparation method thereof, an electrode and a capacitor. Background technique [0002] Supercapacitor is a brand-new capacitor based on the interface electric double layer theory proposed by German physicist Helmholtz. As a new type of energy storage element, it has high specific power, high specific energy and short charging time. , long service life, energy saving and other characteristics. It has extremely broad application prospects in electric vehicles, mobile communications, aerospace, national defense and other fields, and is also a research hotspot in the field of new energy and electronic information. [0003] Supercapacitors are energy storage devices with broad application prospects. Different from ordinary rechargeable batteries and traditional capacitors, it has man...

Claims

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Application Information

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IPC IPC(8): H01G11/24H01G11/30C01G51/04B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00C01G51/04C01P2004/03C01P2004/30C01P2006/40H01G11/24H01G11/30Y02E60/13
Inventor 李健平刘桓基潘浩施智诚张凯朱峻成朱基亮
Owner SHENZHEN POLYTECHNIC
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