Composite materials based on light elements for hydrogen storage

Takayuki Ichikawa, Nobuko Hanada, Shigehito Isobe, Haiyan Leng, Hironobu Fujii

Research output: Contribution to journalReview article

55 Citations (Scopus)

Abstract

In this paper, we review our recent experimental results on hydrogen storage properties of light elements Li, C and Mg based nano-composite materials. The results are summarized as follows: In the Li-N-H system, such as the ball milled 1:1 mixture of Li amide and Li hydride containing a small amount of TiCl3 (1 mol%), a large amount of hydrogen (∼6 mass%) is absorbed and desorbed in the temperature range from 150 to 250°C with good reversibility and high reaction rate. Furthermore, in the ball milled mixture of 3Mg(NH2)2 and 8LiH, ∼7 mass% of hydrogen is reversibly stored in the temperature from 140 to 220°C, indicating one of the suitable hydrogen storage materials. In graphite containing a small amount of nanometer sized Fe (∼2 at.%), a large amount of hydrogen (∼7 mass%) is chemisorbed by ball milling for 80 h under less than 1 M Pa of H 2-gas pressure. However, the chemisorbed hydrogen capacity decreases with increase in the milling pressure for the 80 h ball milled graphite (down to ∼4.1 mass% at 6 MPa), while the physisorbed hydrogen capacity in graphite increases with increase in the milling pressure, reaching up to 0.5-1.0mass% at 6 MPa. Unfortunately, the desorption temperature of chemisorbed hydrogen is higher than 300°C. Therefore, some break-through is necessary for the development of carbon-based materials as one of the hydrogen storage systems. On the other hand, some nano-composite Mg catalyzed by Ni nano-particle or Nb oxide reveals superior reversible hydrogen storage properties: ∼6.5mass% of hydrogen is reversibly stored in the temperature range from 150 to 250°C. Especially, the Nb metals uniformly dispersed in nanometer scale on the surface of MgH2, which was produced by reduction of Nb2O 5, is the best catalyst we have studied so far. Thus, it seems that some Mg nano-composites catalyzed by nano-particles of d-electron transition metals is acceptable for practical applications.

Original languageEnglish
Pages (from-to)1-14
Number of pages14
JournalMaterials Transactions
Volume46
Issue number1
DOIs
Publication statusPublished - 2005 Jan
Externally publishedYes

Fingerprint

light elements
Hydrogen storage
Hydrogen
composite materials
Composite materials
hydrogen
Graphite
balls
graphite
Temperature
Ball milling
Electron transitions
Amides
Hydrides
Oxides
Reaction rates
Transition metals
Desorption
Nanocomposites
Carbon

Keywords

  • Ammonia
  • Catalyst
  • d-electron transition metal
  • Hydrogen storage
  • Lithium amide-imide system
  • Magnesium hydride
  • Mechanical ball milling
  • Metal nitrogen hydrogen system
  • Nano-structured graphite

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

Cite this

Composite materials based on light elements for hydrogen storage. / Ichikawa, Takayuki; Hanada, Nobuko; Isobe, Shigehito; Leng, Haiyan; Fujii, Hironobu.

In: Materials Transactions, Vol. 46, No. 1, 01.2005, p. 1-14.

Research output: Contribution to journalReview article

Ichikawa, Takayuki ; Hanada, Nobuko ; Isobe, Shigehito ; Leng, Haiyan ; Fujii, Hironobu. / Composite materials based on light elements for hydrogen storage. In: Materials Transactions. 2005 ; Vol. 46, No. 1. pp. 1-14.
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abstract = "In this paper, we review our recent experimental results on hydrogen storage properties of light elements Li, C and Mg based nano-composite materials. The results are summarized as follows: In the Li-N-H system, such as the ball milled 1:1 mixture of Li amide and Li hydride containing a small amount of TiCl3 (1 mol{\%}), a large amount of hydrogen (∼6 mass{\%}) is absorbed and desorbed in the temperature range from 150 to 250°C with good reversibility and high reaction rate. Furthermore, in the ball milled mixture of 3Mg(NH2)2 and 8LiH, ∼7 mass{\%} of hydrogen is reversibly stored in the temperature from 140 to 220°C, indicating one of the suitable hydrogen storage materials. In graphite containing a small amount of nanometer sized Fe (∼2 at.{\%}), a large amount of hydrogen (∼7 mass{\%}) is chemisorbed by ball milling for 80 h under less than 1 M Pa of H 2-gas pressure. However, the chemisorbed hydrogen capacity decreases with increase in the milling pressure for the 80 h ball milled graphite (down to ∼4.1 mass{\%} at 6 MPa), while the physisorbed hydrogen capacity in graphite increases with increase in the milling pressure, reaching up to 0.5-1.0mass{\%} at 6 MPa. Unfortunately, the desorption temperature of chemisorbed hydrogen is higher than 300°C. Therefore, some break-through is necessary for the development of carbon-based materials as one of the hydrogen storage systems. On the other hand, some nano-composite Mg catalyzed by Ni nano-particle or Nb oxide reveals superior reversible hydrogen storage properties: ∼6.5mass{\%} of hydrogen is reversibly stored in the temperature range from 150 to 250°C. Especially, the Nb metals uniformly dispersed in nanometer scale on the surface of MgH2, which was produced by reduction of Nb2O 5, is the best catalyst we have studied so far. Thus, it seems that some Mg nano-composites catalyzed by nano-particles of d-electron transition metals is acceptable for practical applications.",
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N2 - In this paper, we review our recent experimental results on hydrogen storage properties of light elements Li, C and Mg based nano-composite materials. The results are summarized as follows: In the Li-N-H system, such as the ball milled 1:1 mixture of Li amide and Li hydride containing a small amount of TiCl3 (1 mol%), a large amount of hydrogen (∼6 mass%) is absorbed and desorbed in the temperature range from 150 to 250°C with good reversibility and high reaction rate. Furthermore, in the ball milled mixture of 3Mg(NH2)2 and 8LiH, ∼7 mass% of hydrogen is reversibly stored in the temperature from 140 to 220°C, indicating one of the suitable hydrogen storage materials. In graphite containing a small amount of nanometer sized Fe (∼2 at.%), a large amount of hydrogen (∼7 mass%) is chemisorbed by ball milling for 80 h under less than 1 M Pa of H 2-gas pressure. However, the chemisorbed hydrogen capacity decreases with increase in the milling pressure for the 80 h ball milled graphite (down to ∼4.1 mass% at 6 MPa), while the physisorbed hydrogen capacity in graphite increases with increase in the milling pressure, reaching up to 0.5-1.0mass% at 6 MPa. Unfortunately, the desorption temperature of chemisorbed hydrogen is higher than 300°C. Therefore, some break-through is necessary for the development of carbon-based materials as one of the hydrogen storage systems. On the other hand, some nano-composite Mg catalyzed by Ni nano-particle or Nb oxide reveals superior reversible hydrogen storage properties: ∼6.5mass% of hydrogen is reversibly stored in the temperature range from 150 to 250°C. Especially, the Nb metals uniformly dispersed in nanometer scale on the surface of MgH2, which was produced by reduction of Nb2O 5, is the best catalyst we have studied so far. Thus, it seems that some Mg nano-composites catalyzed by nano-particles of d-electron transition metals is acceptable for practical applications.

AB - In this paper, we review our recent experimental results on hydrogen storage properties of light elements Li, C and Mg based nano-composite materials. The results are summarized as follows: In the Li-N-H system, such as the ball milled 1:1 mixture of Li amide and Li hydride containing a small amount of TiCl3 (1 mol%), a large amount of hydrogen (∼6 mass%) is absorbed and desorbed in the temperature range from 150 to 250°C with good reversibility and high reaction rate. Furthermore, in the ball milled mixture of 3Mg(NH2)2 and 8LiH, ∼7 mass% of hydrogen is reversibly stored in the temperature from 140 to 220°C, indicating one of the suitable hydrogen storage materials. In graphite containing a small amount of nanometer sized Fe (∼2 at.%), a large amount of hydrogen (∼7 mass%) is chemisorbed by ball milling for 80 h under less than 1 M Pa of H 2-gas pressure. However, the chemisorbed hydrogen capacity decreases with increase in the milling pressure for the 80 h ball milled graphite (down to ∼4.1 mass% at 6 MPa), while the physisorbed hydrogen capacity in graphite increases with increase in the milling pressure, reaching up to 0.5-1.0mass% at 6 MPa. Unfortunately, the desorption temperature of chemisorbed hydrogen is higher than 300°C. Therefore, some break-through is necessary for the development of carbon-based materials as one of the hydrogen storage systems. On the other hand, some nano-composite Mg catalyzed by Ni nano-particle or Nb oxide reveals superior reversible hydrogen storage properties: ∼6.5mass% of hydrogen is reversibly stored in the temperature range from 150 to 250°C. Especially, the Nb metals uniformly dispersed in nanometer scale on the surface of MgH2, which was produced by reduction of Nb2O 5, is the best catalyst we have studied so far. Thus, it seems that some Mg nano-composites catalyzed by nano-particles of d-electron transition metals is acceptable for practical applications.

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