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In-situ preparation method for anode material of Ni(OH)2 nickel-metal hydride (NI-MH) battery through foamed nickel

A technology for in-situ preparation of Ni-MH batteries, which is applied to battery electrodes, alkaline storage battery electrodes, circuits, etc., can solve problems such as large contact resistance, loose connection, and poor positive electrode activity of Ni-MH batteries. Good cycle performance and high battery capacity

Inactive Publication Date: 2011-06-01
HARBIN ENG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0011] The invention provides a kind of Ni(OH) prepared in situ with foamed nickel 2 It is the positive electrode material of nickel-metal hydride batteries, which overcomes the low utilization rate of active materials, concentration polarization and Ni(OH) 2 The connection with nickel foam is not tight, and the contact resistance is large, which solves the problem of poor positive electrode activity of nickel-metal hydride batteries

Method used

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Embodiment Construction

[0015] The following examples describe the present invention in more detail.

[0016] 1. Firstly mix in 0.4mol·L -1 Ni(NO 3 ) 2 Mix with 28% by mass ammonia solution, and stir continuously for 10 minutes to obtain a dark blue nickel-ammonia complex solution. The mixed solution was preheated at 90°C for 2 hours, and then placed in 1-4cm 2 Nickel foam (300-350g m -2 ), heated (80-95°C) for 10-15 hours, took out the nickel foam, and sintered it in an electric furnace for 2-3 hours (200-250°C), that is, Ni(OH) grown in-situ by nickel foam was synthesized. 2 .

[0017] 2. Firstly mix in 0.5mol·L -1 Ni(NO 3 ) 2 Mix with 32% ammonia solution by mass, and stir continuously for 15 minutes to obtain a dark blue nickel-ammonia complex solution. The mixed solution was preheated at 90°C for 2 hours, and then placed in 1-4cm 2 Nickel foam (300-350g m -2 ), heated (80-95°C) for 10-15 hours, took out the nickel foam, and sintered it in an electric furnace for 2-3 hours (200-250°C),...

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Abstract

The invention provides an in-situ preparation method for an anode material of Ni(OH)2 nickel-metal hydride (NI-MH) battery by using foamed nickel. The method comprises the following steps: continuously blending 0.4-0.6mol.L<-1>Ni(NO3)2 and 28-32% ammonia spirit for 10-15 minutes to obtain a blue-black nickel-ammonia complex solution; preheating nickel-ammonia complex solution for 2 hours at a temperature of 90 DEG C; adding 1-4 cm<2> of foamed nickel; heating for 10-15 hours at a temperature of 80-95 DEG C; and taking out the foamed nickel; sintering for 2-3 hours at a temperature of 200-250 DEG C in an electric stove to obtain Ni(OH)2 generated by foamed nickel in-situ growth, wherein the specific surface area of the foamed nickel is 300-350g.m<-2>. The Ni(OH)2 obtained by the foamed nickel in-situ preparation can be used as the anode of the NI-MH battery. The preparation method is simple, the battery capacity is high, and the cycle performance is good.

Description

technical field [0001] The invention relates to a preparation method of a nickel-hydrogen battery cathode material. Specifically, it is a kind of Ni(OH) prepared in situ from nickel foam in the field of nickel-metal hydride batteries. 2 Preparation method of cathode material. Background technique [0002] Energy occupies a very important position in human society. In the process of social development, the process of energy crisis and the discovery of new energy is constantly repeated. A chemical power source is a device that converts chemical energy into electrical energy, and is the most efficient of all energy conversions. With Ni(OH) 2 Alkaline secondary rechargeable batteries as positive active materials play an important role in the storage battery family, including cadmium / nickel (Cd / Ni), hydrogen / nickel (H / Ni), metal hydride / nickel (MH / Ni) and zinc / nickel (Zn / Ni) batteries and other varieties, among which MH / Ni is currently the mainstream. [0003] Ni-MH batteri...

Claims

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Application Information

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IPC IPC(8): H01M4/26H01M4/52H01M4/30
CPCY02E60/124Y02E60/10
Inventor 王贵领王莎莎常莎莫英华曹殿学汤胜
Owner HARBIN ENG UNIV