Our Group

A “hydrogen economy”, in which hydrogen acts as energy carrier along with electricity, is being promoted as an ultimate solution to the world’s energy and environmental problems. A major challenge in commercialization of hydrogen energy is how to safely store the lightest hydrogen to a high energy density required for transportation application.

In principle, hydrogen can be stored in gas-, liquid-, and solid-states. In comparison with the former two forms, the solid state H storage via interaction between special materials and hydrogen possesses significant advantages on energy efficiency and safety issue. Therefore, a “gold rush” flurry of research activity has been directed towards the development of viable hydrogen storage materials for onboard application.

Recently, the development of hydrogen storage material was significantly accelerated due to the increasingly strengthened interdisciplinary collaboration and enhanced participation & support of academia, industry and government. As a result, many new research branches associated with the discoveries of novel material structures/systems were established. These progresses, however, have not substantially narrowed the gap between achievable capability and that required for commercial onboard hydrogen application. A long-term high-risk/high pay-off basic research is still required, where the design and discovery of new, higher efficiency hydrogen storage materials is based on better understanding of the chemical and physical processes governing the hydrogen–materials interaction.

Currently, our group focuses on the following hydrogen storage material systems:

Mg-based composites, Complex hydrides, Metal nitrides, Chemical hydride

For details of our research, please refer to the latest publications.

Our Group

Our Research

Publications

Complex

hydridesMgH2

Chemical

hydride

Metal nitride

Store in MaterialsHH

Our Group

Our Research

Publications

Complex

hydridesMgH2

Chemical

hydride

Metal nitride

Our Research Group

Dr. Ping Wang, Group Leader

Mr. Xiang-Dong Kang

PhD student

Ms. Hong Liu

PhD student

Mr. Lai-Peng Ma

PhD student

Mr. Zhan-Zhao Fang

Master studentGo backGo back

Our Group

Our Research

Publications

Complex

hydridesMgH2

Chemical

hydride

Metal nitride

Dr. Ping Wang

Contact Information

Position: Associate Professor, Institute of Metal Research, Chinese Academy of Sciences

Address: 72 # Wenhua Road, Shenyang 110016, P.R. China

Tel: (+86) 24 2397 1622

Fax: (+86) 24 2389 1320

E-Mail:[email protected]

Education and Employment

2004- Associate Professor, Institute of Metal Research, Chinese Academy of Sciences

2002-2004 Guest Researcher, Chemistry Department, Hawaii University, USA

2002 Guest Researcher, Department of Physics, National University of Singapore, Singapore

2001-2002 Guest Researcher, Faculty of integrated Arts & Sciences, Hiroshima University, Japan

1998-2001 Institute of Metal Research, CAS, Materials Science, PhD degree

1992-1995 Northeast University, China, Metallurgical Physichemsitry, MA degree

1988-1992 Northeast University, China, Metallurgical Physichemsitry, BA degree

Ten Representative Publications

10. Exploration of the nature of active Ti-species in metallic Ti-doped NaAlH4

P. Wang, X.D. Kang and H.M. Cheng, J. Phys. Chem. B, 109 (2005) 20131-20136.

9. Direct formation of Na3AlH6 by mechanical milling NaH/Al with TiF3

P. Wang, X.D. Kang and H.M. Cheng, Appl. Phys. Lett., 87 (2005) 071911.

8. Improved hydrogen storage property of TiF3-doped NaAlH4

P. Wang, X.D. Kang and H.M. Cheng, ChemPhysChem, 6 (2005) 2488-2451.

7. KH+Ti co-doped NaAlH4 for high-capacity hydrogen storage

P. Wang, X.D. Kang and H.M. Cheng, J. Appl. Phys., 98 (2005) 074905.

6. Preparation of Ti-doped sodium aluminium hydride from mechanical milling of NaH/Al with off-the-shelf Ti powder

P. Wang, C.M. Jensen, J. Phys. Chem. B, 108 (2004) 15827-15829.

5. A study on mechanically milled h-BN-H system P. Wang, S. Orimo, and H. Fujii, Applied Physics A, 78 (2004) 1235-1239.

4. Hydrogen in the mechanically prepared nanostructured h-BN; a critical comparison with that in nanostructured graphite

P. Wang, S. Orimo, T. Matsushima, H. Fujii, and G. Major, Appl. Phys. Lett., 80 (2002) 318-320.

3. Mg-FeTi1.2 (amorphous) composite for hydrogen storage

P. Wang, H.F. Zhang, B.Z. Ding, and Z.Q. Hu, J. Alloy compd., 334 (2002) 243-248.

2. Structural and hydriding properties of composite Mg-ZrFe1.4Cr0.6

P. Wang, H.F. Zhang, B.Z. Ding, and Z.Q. Hu, Acta Mater., 49 (2001) 921-926.

1. Decomposition behaviour of MgH2 prepared by reaction ball-milling

P. Wang, A.M. Wang, Y.L. Wang, H.F. Zhang and Z.Q. Hu, Scripta Mater., 43 (2000) 83-87.

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Our Group

Our Research

Publications

Metal hydrideMg/SWNT composite for high-capacity H-storage

High capacity

MgNovel nanostructure

SWNT

+DHRH at 200°C

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Get details from papers.

0 10 20 30 40 50 60 700

1

2

3

4

5

6

7

MgH2+(as)-SWNTs

MgH2+(p)-SWNTs

MgH2

H-a

mount abso

rbed (

wt.%

)

Time (min)

0 10 20 30 40 50 60 700

1

2

3

4

5

6

7

300oC

300oC

350oC

MgH2+5ap

MgH2+5p

MgH2H

-am

ount deso

rbed (

wt.%

)

Time (min)

250 300 350 400

MgH2-5ap

MgH2-5p

MgH2

Heat F

low

(a.u

.)

Temeperature (oC)

NaAlH4: a model Complex Hydride system

Our Group

Our Research

Publications

NaAlH4 1/3Na3AlH6+2/3Al+H2 NaH+Al+3/2H2

3.7 wt.% 1.85 wt.%Ti-doping

Novel Ti+KH co-doping method Novel dopant precursor TiF3

Get details from the paper

20 30 40 50 60 70 80

Inte

nsity

(a.

u.)

32.5 33.0

Inte

nist

y (a

.u.)

2 (deg.)

Na3AlH

6 (112)

29 30

Inte

nsity

(a

. u.)

Na (110)

2 (deg.)

TiH2

Ti TiH

x

(x<2)

NaH Al NaAlH

4

(d)

(c)

(b)

(a)

2 (deg.)

20 30 40 50 60 70 80

Inte

nsity

(a.

u.)

32.5 33.0

Inte

nist

y (a

.u.)

2 (deg.)

Na3AlH

6 (112)

29 30

Inte

nsity

(a

. u.)

Na (110)

2 (deg.)

TiH2

Ti TiH

x

(x<2)

NaH Al NaAlH

4

(d)

(c)

(b)

(a)

2 (deg.)

Detection of TiHx

+ TiH2 + Ti0 2 4 6 8 10

0.0

0.5

1.0

1.5

2.0

2.5

3.0

3.5

0 2 4 6 8 10 12

0.0

0.5

1.0

1.5

2.0

2.5

3.0

3.5

H-a

mou

nt d

esor

bed,

wt.

%

Time, h

Get details from the paper

Identification of catalytically active species --- Ti hydride

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1 2 3 4 5 6 7 8 9 100

1

2

3

4

5

Doped with KH+Ti Doped with Ti

H-c

apac

ity, w

t.%

Cycle Number

1 2 3 4 5 6 7 8 9 100

1

2

3

4

5

Doped with KH+Ti Doped with Ti

H-c

apac

ity, w

t.%

Cycle Number

Improved DH performance at 120°C

0 2 4 6 8 10 120.0

0.5

1.0

1.5

2.0

2.5

3.0

NaH+Al+4mol%TiCl3

NaH+Al+4mol%TiF3

H-a

mou

nt d

esor

bed,

wt.%

Time, h

Our Group

Our Research

Publications

Li-Mg-N-H: a new high-performance H-storage system

2LiNH2+MgH2 Li2MgN2H2+2H2 Mg(NH2)2+2LiH

Improved kinetics by adding CNT

Mg(NH2)2/2LiH+CNT(ap)

Mg(NH2)2/2LiH+CNT(p)

Mg(NH2)2/2LiH

Enhanced capacity by optimizing the phase ratio

DH at 200°C

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DH at 200°C DH at 180°C

0 20 40 60 80 1000

1

2

3

4

H-a

mou

nt d

esor

bed,

wt.%

Time, min

0 100 200 300 400 5000

1

2

3

4

H-a

mount deso

rbed, w

t.%

Time, min

0 30 60 90 120 150 1800

1

2

3

4

5

H-a

mou

nt d

esor

bed,

wt.%

Time, min1.5 2.0 2.5 3.0

0

1

2

3

4

5

H-C

apac

ity, w

t.%

LiNH2: MgH

2 molar ratio

(2:1)(2.3:1)

(2.15:1)

1.5 2.0 2.5 3.00

1

2

3

4

5

H-C

apac

ity, w

t.%

LiNH2: MgH

2 molar ratio

(2:1)(2.3:1)

(2.15:1)

Our Group

Our Research

Publications

Chemical Hydride NaBH4: On-demand H-source

NaBH4 + 2H2O NaBO2 + 4H2 + 267 kJCatalyst

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Fuel Unit

Fuel

P

Catalyst Bed

Reacting Chamber

PEMFuel CellH2

NaBO2

Solution

Cooling System

H2 Separator

H2O recycled

Product Collector

Hydride Regeneration

Our Group

Our Research

Publications

Complex

hydridesMgH2

Chemical

hydride

Metal nitride

Latest Publications

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10.Hydrogen storage properties of MgH2/SWNT composite prepared by ball milling

C.Z. Wu, P. Wang, X.D. Yao, C. Liu, D.M. Chen, G.Q. Lu, and H.M. Cheng, J. Alloys Compd., (2006) online published.

9. Effect of carbon/noncarbon addition on hydrogen storage behaviors of magnesium hydride C.Z. Wu, P. Wang, X.D. Yao, C. Liu, D.M. Chen, G.Q. Lu, and H.M. Cheng, J. Alloys Compd.,

(2006) online published.

8. Structure and hydrogen storage property of ball-milled LiNH2/MgH2 mixture

Y. Chen, C.Z. Wu, P. Wang, H.M. Cheng, Inter. J. Hydrogen Energy, (2006) online-published.

7. Catalytic effect of Al3Ti on the reversible dehydrogenation of NaAlH4

X.D. Kang, P. Wang, X.P. Song, X.D. Yao, G.Q. Lu and H.M. Cheng, J. Alloys Compd., (2006) online-published.

6. Dependence of H-storage performance on preparation conditions in TiF3 doped NaAlH4

P. Wang, X.D. Kang and H.M. Cheng, J. Alloy compd., (2006) online-published.

5. Effects of SWNT and metallic catalyst on hydrogen absorption/desorption performance of MgH2

C.Z. Wu, P. Wang, X.D. Yao, C. Liu, D.M. Chen, G.Q. Lu, and H.M. Cheng, J. Phys Chem B, 109 (2005) 22217-22221.

4. Exploration of the nature of active Ti-species in metallic Ti-doped NaAlH4

P. Wang, X.D. Kang and H.M. Cheng, J. Phys. Chem. B, 109 (2005) 20131-20136.

3. Direct formation of Na3AlH6 by mechanical milling NaH/Al with TiF3

P. Wang, X.D. Kang and H.M. Cheng, Appl. Phys. Lett., 87 (2005) 071911.

2. Improved hydrogen storage property of TiF3-doped NaAlH4

P. Wang, X.D. Kang and H.M. Cheng, ChemPhysChem, 6 (2005) 2488-2451.

1. KH+Ti co-doped NaAlH4 for high-capacity hydrogen storage

P. Wang, X.D. Kang and H.M. Cheng, J. Appl. Phys., 98 (2005) 074905.