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A hydrogen storage alloy of cobalt oxide and cobalt boron containing carbon fiber microtubes and its preparation method

A technology of hydrogen storage alloy and micro-tube, applied in chemical instruments and methods, metal processing equipment, hydrogen, etc., can solve problems such as unseen manufacturing methods, achieve easy reaction, strong operability, enhanced electrical conductivity and corrosion resistance sexual effect

Active Publication Date: 2021-05-11
中盈志合吉林科技股份有限公司
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Problems solved by technology

[0010] In summary: Cobalt oxide and cobalt-boron hydrogen storage alloy materials containing carbon fiber microtubes obtained by adding cobalt oxide and carbon fiber microtubes through mechanical alloying based on cobalt-boron hydrogen storage alloys and their manufacturing methods have not been disclosed in patents and article reports

Method used

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  • A hydrogen storage alloy of cobalt oxide and cobalt boron containing carbon fiber microtubes and its preparation method
  • A hydrogen storage alloy of cobalt oxide and cobalt boron containing carbon fiber microtubes and its preparation method
  • A hydrogen storage alloy of cobalt oxide and cobalt boron containing carbon fiber microtubes and its preparation method

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preparation example Construction

[0033] The present invention also provides a method for preparing cobalt oxide and cobalt-boron hydrogen storage alloy materials containing carbon fiber microtubes, comprising the following steps:

[0034] Step 1: According to Co 2 B hydrogen storage material composition expression Weigh Co metal powder and B powder, mix them and put them into a tube furnace for annealing;

[0035] Step 2: Co obtained in Step 1 2 B is mechanically crushed to obtain Co 2 B hydrogen storage material powder;

[0036] Step 3: Weigh Co respectively 3 o 4 Powder and the Co obtained in step 2 2 B. The hydrogen storage material powder is put into a ball mill tank for ball milling to obtain a cobalt oxide-containing cobalt boron hydrogen storage material. The weight ratio of the ball to material is (10-15): 1, and the ball milling time is 10-15 minutes;

[0037]Step 4: Wash the absorbent cotton with distilled water, dry it at 60-80°C for 12-24 hours, and then calcinate it in the air at 750-850°C ...

Embodiment 1

[0047] Example 1: Cobalt oxide and cobalt-boron hydrogen storage materials containing carbon fiber microtubes Expression: Co 2 B+1wt%Co 3 o 4 +1wt% CFMTs, the preparation method of the material is as follows:

[0048] (1) Accurately weigh 9.16g of Co metal (99.9% in purity) and 0.84g of B nonmetal (99.9% in purity), mix the weighed powder evenly, and put the quartz boat with the evenly mixed powder into the tube furnace In the quartz tube, the quartz tube is sealed, and the tube furnace is evacuated to a state of 1×10 -1 MPa, then fill the protective gas with high-purity argon to 1.1±0.1 atmosphere, pump it three times, then turn on the power, use resistance wire to heat, heat up to 800°C at a heating rate of 5°C / min, keep it warm for 10h, and perform annealing. to get Co 2 B hydrogen storage alloy.

[0049] (2) Put the annealed alloy powder obtained in the above step (1) into an agate mortar and grind it mechanically for 10 minutes. After the time is up, pour the alloy p...

Embodiment 2

[0053] Example 2: Cobalt oxide and cobalt-boron hydrogen storage materials containing carbon fiber microtubes Expression: Co 2 B+3wt%Co 3 o 4 +1wt% CFMTs, the material is prepared as follows

[0054] Step (1) and step (2), (4) are with embodiment 1;

[0055] (3) Accurately weigh the 9.7gCo obtained in the above step (2) respectively 2 B hydrogen storage alloy powder and 0.3g Co 3 o 4 , in a glove box filled with a high-purity argon atmosphere, put it into a stainless steel ball mill tank for ball milling. The diameter of the steel ball is 4mm, the ball-to-material ratio is 10:1, the vibration frequency is 200 rpm, and the ball milling time is 10min. Take it off, open the ball mill jar in a high-purity argon atmosphere glove box to obtain a cobalt oxide-containing cobalt boron hydrogen storage material, and seal it and store it in a desiccator.

[0056] The XRD figure of the second cobalt oxide and cobalt-boron hydrogen storage material containing carbon fiber microtubes ...

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Abstract

The invention provides a cobalt oxide and cobalt-boron hydrogen storage alloy containing carbon fiber microtubes and a preparation method thereof, belonging to the field of hydrogen storage materials. The expression of the hydrogen storage alloy is: Co 2 B+x wt% Co 3 o 4 +1wt% CFMTs, where 1≤x≤5. The present invention also provides a preparation method of cobalt oxide and cobalt-boron hydrogen storage alloy containing carbon fiber microtubes. The method is to mix Co powder and B powder and put them into a tube furnace for annealing; weigh Co 3 o 4 Powder and Co 2 B. Put the powder of hydrogen storage material into a ball milling tank for ball milling to obtain a hydrogen storage alloy material containing cobalt oxide and cobalt boron; then grind the carbon fiber microtube with the obtained cobalt oxide and cobalt boron hydrogen storage alloy to obtain a carbon fiber microtube cobalt oxide and cobalt boron hydrogen storage alloy materials. The experimental results show that after 50 cycles, the capacity fading rate of cobalt oxide and cobalt-boron hydrogen storage alloy containing carbon fiber microtubes is lower than that of cobalt-boron hydrogen storage alloy.

Description

technical field [0001] The invention belongs to the technical field of hydrogen storage materials, in particular to a method for preparing cobalt oxide and cobalt-boron hydrogen storage alloy materials containing carbon fiber microtubes. Background technique [0002] Hydrogen storage alloy is used as the anode material of nickel-metal hydride battery, and its hydrogen storage performance plays a vital role in the performance of the whole nickel-hydrogen battery. Therefore, it is of great significance to improve the performance of Ni-MH batteries by improving the hydrogen storage performance of hydrogen storage alloys. [0003] It can be seen from the current research results that the discharge capacity of Co-based hydrogen storage alloys has exceeded the current commercial rare earth hydrogen storage alloys AB 5 Theoretical discharge capacity of type alloy (372mAh / g, LaNi 5 h 6 ), and its cycle stability is much higher than that of Mg 2 Ni-based (AB type hydrogen storage...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B3/00B22F1/00B22F9/04C22C19/07
CPCC01B3/0078C01B3/0084B22F9/04C22C19/07B22F2009/043B22F1/142Y02E60/32
Inventor 刘万强陈世廪陈世鏊李红兵王夺于洪海徐达奇王新华吕健赵建勋
Owner 中盈志合吉林科技股份有限公司
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