Hydrogen, Fuel Cells, and Infrastructure Technologies

FY 2003 Progress Report

Doped Carbon Nanotubes for Hydrogen Storage
Ragaiy Zidan (Primary Contact), Apparao M. Rao, Ming Au Hydrogen Technology Laboratory
Savannah River Technology Center (SRTC) 773-41A/ 247 Savannah River Site Aiken, SC 29808 Phone: (803) 725-1726; Fax: (803) 725-4129; E-mail: ragaiy.zidan@srs.gov

DOE Technology Development Manager: Sunita Satyapal
Phone: (202) 586-2336; Fax: (202) 586-9811; E-mail: Sunita.Satyapal@ee.doe.gov

Objectives
Develop reversible high-capacity hydrogen storage material to meet the DOE goals for a hydrogen storage system: • • • Hydrogen capacity greater than 6 wt.% Favorable thermodynamic and kinetics suitable for transportation applications Stable with hydriding/dehydriding cycling

Technical Barriers
This project addresses the following technical barriers from the Hydrogen Storage section of the Hydrogen, Fuel Cells and Infrastructure Technologies Program Multi-Year R,D&D Plan: • • • • M. N. O. P. Hydrogen Capacity and Reversibility Lack of Understanding of Hydrogen Physisorption and Chemisorption Test Protocols and Evaluation Facilities Dispensing Technology

Approach
• • • • • Produce large quantities of consistent structure carbon nanotube material Attempt to create a weak covalent hydrogen bond, dihydrogen Dope carbon nanotubes with transition metals and alloys Dope carbon nanotubes with other elements and metal clusters Tune material for hydrogen sorption to occur at desired temperature and pressure

Accomplishments
• Synthesis of material was achieved with: - Different dopants - Different quantities of dopants - Different diameters and configurations Thermodynamic and material characterization were conducted by: - Setting up a high pressure thermovolumetric (TVA) system

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Hydrogen, Fuel Cells, and Infrastructure Technologies

FY 2003 Progress Report

- Measuring the hydriding and dehydriding of material - Examining