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Hydrogen Storage Alloy Used for Ni-MH Battery

This product has obtained the following government funding:

Technology Innovation Fund for Small and Medium-sized Technology-based Enterprises in 2002

Energy Saving and New Energy Vehicles Major Project of the 11th Five-Year Plan 863 Program

Circular Economy Project of Haidian District in 2009

Science and Technology Development Plan of Science and Technology Commission of Haidian District in 2010

The second batch of Beijing Special Funds for the Development of Small and Medium-sized Enterprises in 2010

The Torch Project in 2010

Special Fund for Promoting Energy Conservation and Emission Reduction of Haidian District in 2011

Scientific and Technological Achievements Transformation and Industrialization Special Project of Haidian District in 2011

This product is identified as:

Beijing's 10th batch of independent innovation products

Beijing Low-carbon Environmental Protection Product Catalog in 2011





The Operating Principle

Hydrogen storage alloys are materials that can absorb and desorb a large amount of hydrogen reversibly under certain temperatures and pressures. Hydrogen storage alloys are used as the negative electrodes of MH/Ni batteries. The electrolyte of MH/Ni batteries is aqueous solution of potassium hydroxide. During the charging process, the hydrogen ions formed from the electrolytic water adsorb on the surface of the negative electrode, then diffuse into the electrode, react with hydrogen storage alloys and turn into metal hydrides, MHx. When the electric current is discharged reversely, the metal hydrides release the absorbed hydrogen ions and oxidize into water as both the hydrogen storage alloys and metal hydrides are good electric conductors. The electrochemical reaction equation is as below,

M + xNi(OH)2 ←→ MHx + xNiOOH

During the charge and discharge process, there is neither metal ion dissolution from the positive electrodes, nor metal ion deposition from the negative electrodes. The reactions occurred on both the positive and negative electrodes belong to solid-phase transition mechanism, in which the metal-phase transforms into MHx-phase, so both electrodes have high structural stability.

Introduction

Making use of the abundant rare-earths resource in China, with advanced equipments, technology and analysis instruments, we produce high quality hydrogen storage alloys under the registered trademark of Whole Win. We have the production scale of 1000 tons per year with mature technology and steady quality.

Our company undertook the national 11th Five-Year Plan 863 Program energy saving and new energy vehicle major project “Development of High Performance and Low Cost Hydrogen Storage Alloy for Power Battery”. This project has successfully passed the acceptance of the Ministry of Science and Technology, and has provided high quality raw materials for Ni-MH batteries for electric vehicles in China.


Specifications and Performance

Co, wt.

Type

Feature

Discharge Capacity (mAh/g)

Cycle Life (Half cell test)

Plateau Pressure (45℃,
MPa)

Suggestions

At 60mA/g

At 300mA/g

None

L6A

Ultra low-cost

≥300

≥280

≥200

0.025±0.01

Recommended for the production of low capacity batteries

3%

L2

Economic

≥300

≥280

≥220

0.045±0.01

Recommended for the production of low and middle capacity batteries

4%

L5A

Low cost and high power

≥310

≥290

≥280

0.04±0.01

Recommended for the production of low cost and high power batteries

6%

L3B

Normal

≥320

≥300

≥300

0.015±0.01

Recommended for the production of normal capacity batteries

L3DC

High power

≥310

≥290

≥300

0.05±0.02

Recommended for the production of high power batteries

C3A

High power

≥310

≥290

≥320

0.055±0.01

Recommended for the production of high power and long life batteries

L3A

Low cost and long life

≥300

≥280

≥330

0.04±0.01

Recommended for the production of low cost and long life batteries

8%

G1F

Normal

≥310

≥290

≥250

0.025±0.01

Recommended for the production of normal capacity batteries

G1

High capacity

≥340

≥320

≥280

0.05±0.02

Recommended for the production of high capacity batteries

G1C

Wide temp

≥320

≥300

≥280

0.08±0.02

For batteries used in environment with a wide temperature range

G1D

Low temp

≥320

≥300

≥280

0.06±0.02

Recommended for the production of batteries use at low temperature

10%

L1G

High temp

≥300

≥280

≥350

0.025±0.01

Recommended for the production of batteries use at high temperature

L1B

High capacity and long life

≥340

≥300

≥300

0.025±0.01

Recommended for the production of high capacity and long life batteries

L1

Long life

≥310

≥290

≥350

0.045±0.01

Recommended for the production of long life batteries

C1

Ultra-long life

≥300

≥280

≥380

0.06±0.02

recommended for the production of ultra-long life batteries

C3B







Note: The particle sizes of the alloy are 125μm, 75μm, 53μm, and can be adjusted according to clients’ requirements.



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Metal Hydride Hydrogen Storage Tank
Hydrogen Storage Alloy Used for Metal Hydride Tank
Hydrogen Storage Alloy Used for Ni-MH Battery
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