Hierarchically Controlled Inside-Out Doping of Mg Nanocomposites for Moderate Temperature Hydrogen Storage
Journal Article
·
· Advanced Functional Materials
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Molecular Foundry; Korea Advanced Inst. of Science and Technology (KAIST), Daejeon (Republic of Korea). Dept. of Chemical and Biomolecular Engineering
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Molecular Foundry
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States). Materials Science Division
- Univ. of California, Berkeley, CA (United States). Dept. of Materials Science and Engineering
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Molecular Foundry; Sandia National Lab. (SNL-CA), Livermore, CA (United States)
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Advanced Light Source (ALS)
- Korea Advanced Inst. of Science and Technology (KAIST), Daejeon (Republic of Korea). Dept. of Chemical and Biomolecular Engineering
Demand for pragmatic alternatives to carbon–intensive fossil fuels is growing more strident. Hydrogen represents an ideal zero–carbon clean energy carrier with high energy density. For hydrogen fuel to compete with alternatives, safe and high capacity storage materials that are readily cycled are imperative. Here, development of such a material, comprised of nickel–doped Mg nanocrystals encapsulated by molecular–sieving reduced graphene oxide (rGO) layers, is reported. While most work on advanced hydrogen storage composites to date endeavor to explore either nanosizing or addition of carbon materials as secondary additives individually, methods to enable both are pioneered: “dual–channel” doping combines the benefits of two different modalities of enhancement. Specifically, both external (rGO strain) and internal (Ni doping) mechanisms are used to efficiently promote both hydriding and dehydriding processes of Mg nanocrystals, simultaneously achieving high hydrogen storage capacity (6.5 wt% in the total composite) and excellent kinetics while maintaining robustness. Furthermore, hydrogen uptake is remarkably accomplished at room temperature and also under 1 bar—as observed during in situ measurements—which is a substantial advance for a reversible metal hydride material. In conclusion, the realization of three complementary functional components in one material breaks new ground in metal hydrides and makes solid–state materials viable candidates for hydrogen–fueled applications.
- Research Organization:
- Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States); Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States); National Renewable Energy Laboratory (NREL), Golden, CO (United States); Sandia National Laboratories (SNL-CA), Livermore, CA (United States)
- Sponsoring Organization:
- Ministry Of Science And Technology, Dept. of Science and Technology (DST) (India); USDOE National Nuclear Security Administration (NNSA); USDOE Office of Energy Efficiency and Renewable Energy (EERE), Fuel Cell Technologies Office (EE-3F); USDOE Office of Energy Efficiency and Renewable Energy (EERE), Solar Energy Technologies Office (EE-4S); USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
- Contributing Organization:
- Bay Area Photovoltaic Consortium (BAPVC); Partnership to Advance Clean Energy Research (PACE-R)
- Grant/Contract Number:
- AC02-05CH11231; AC04-94AL85000; AC36-08GO28308; AC52-07NA27344; EE0004946
- OSTI ID:
- 1461741
- Alternate ID(s):
- OSTI ID: 1402521
OSTI ID: 1474048
- Report Number(s):
- LLNL-JRNL--722239; SAND2018--10164J; 861906
- Journal Information:
- Advanced Functional Materials, Journal Name: Advanced Functional Materials Journal Issue: 47 Vol. 27; ISSN 1616-301X
- Publisher:
- WileyCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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