Nickel-hydrogen power battery

A power battery and nickel-metal hydride technology, which is applied in the field of high-power battery preparation, can solve the problems of high output power, high temperature resistance, low temperature resistance of the battery, which have not been reported, the battery high-power discharge performance is reduced, and can not work, etc. Small expansion, avoiding internal short circuit and excellent performance

Inactive Publication Date: 2003-12-24
NANKAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the above methods generally require the use of complex battery electrode fabrication techniques, such as surface treatment, high temperature heating, etc., and there are no reports on the high output power, high temperature resistance, and low temperature ...

Method used

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Embodiment 1

[0025] Positive active material spherical Ni(OH) 2 Preparation of composite materials with additives. The present invention adopts chemical precipitation crystal growth method to prepare spherical Ni(OH) 2 And add as Y 2 O 3 , CeO 2 , CoO, ZnO, TiO 2 , Yb 2 O 3 And other additives to make the positive electrode composite active material. Spherical Ni(OH) 2 Low density Ni(OH) with irregular shapes 2 In comparison, it has relatively high density and good filling fluidity. Therefore, spherical Ni(OH) is used 2 As an active material, it can increase the filling amount per unit volume of the electrode, thus increasing the electrode capacity accordingly.

[0026]Add Y 2 O 3 , CoO and Yb 2 O 3 (Mass ratio 1: 1: 1) spherical Ni(OH) 2 , The mass ratio of the additive amount is 4%.

[0027] In the preparation process, nickel sulfate, sodium hydroxide, ammonia and metered additives are generally selected as raw materials; NiSO 4 The relative density of the solution is controlled at 1.05g / cm ...

Embodiment 2

[0029] AB 3 Preparation of a new type of hydrogen storage alloy. AB 3 Type alloy structure contains AB 5 And AB 2 Unit, such as AB 5 +2AB 2 = 3AB 3 . LaCaMgNi 6 Mn 2 Al i As an example, the X-ray diffraction analysis with silicon powder is as figure 2 As shown, figure 2 For AB 3 X-ray diffraction analysis of new hydrogen storage alloy and silicon powder. Because of AB 3 The c-axis of the alloy lattice is long, and it can contain Mm, Ca, Mg, Ti on the A side, so the theoretical hydrogen storage capacity can reach 500mAh / g, and the actual measurement can generally reach 360-420mAh / g, and the price is relatively It is inexpensive and has good cycle life. In the alloy preparation process, first melt the volatile metals Ca and Mg with Al to prepare a master alloy, and then add other components in a vacuum induction furnace (1200°C) for induction smelting, and in a water-cooled copper crucible Casting into alloy ingots. Under the protection of argon, the alloy ingot is crushed into al...

Embodiment 3

[0032] MmCaMgNi 6 Co 1 Mn 1 Al 1 Alloy electrode. See Example 2 for specific operation steps. Add C 60 , BN and Y 2 O 3 (Mass ratio 1: 1: 1) MmCaMgNi 6 Co 1 Mn 1 Al 1 In the alloy electrode, the mass ratio of additives is 4%. The prepared electrode has excellent charge and discharge performance, see image 3 , image 3 C added for 4% 60 , BN and Y 2 O 3 MmCaMgNi 6 Co 1 Mn 1 Al 1 Electrode charge and discharge curve.

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Abstract

The battery consists of anode, diaphragm, electrolyte and cathode. The active material of the anode is composed of spherical Ni(OH)2 grains and oxide additive of transition metal. The active materialof the cathode is composed of the additive C60, BN or transition metal oxide and AB3 type hydrogen stored alloy. In formula AB3, A includes at least two elements among mixed rare earths Mm, Ca, Mg, Ti, and B includes at least three elements among Ni, Co, Mn, Cu and Al. spherical Ni (OH) 2 anode material with small expansion, high temperature resistant and high utilization ratio is prepared by using the crystal growth method of chemical deposition. The hydrogen stored alloy with high capacity, large hydrogen diffusion coefficient as well as antioxidant and anticorrosion, low self-discharge and long service life. The battery is suitable for large scale of production.

Description

Technical field [0001] The invention relates to the preparation of a high-power battery, which is a nickel-hydrogen power battery. Background technique [0002] The research and development of new high-energy batteries has been recognized as the driving force for the rapid development of information technology, new energy, new materials, environmental protection and other high-tech industries in the 21st century. It has become a priority technology and has constituted a huge dual-use market. . In the field of new high-energy batteries, high-power, high-temperature, and low-temperature resistant nickel-hydrogen power batteries have become a new highlight. This is because the overall performance of nickel-hydrogen power batteries can better meet high-power startup and wide operating temperature ranges. And so on. [0003] At present, the development of high-power nickel-metal hydride power batteries is a hot research topic at home and abroad. However, there are few patents applied ...

Claims

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Application Information

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IPC IPC(8): H01M4/24H01M4/28H01M4/30
CPCY02E60/124Y02E60/10
Inventor 陈军李锁龙陶占良
Owner NANKAI UNIV
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