Route to high-energy density polymeric nitrogen t-N via He-N compounds
Journal Article
·
· Nature Communications
- Jiangsu Normal Univ., Xuzhou (China)
- Jilin Univ., Changchun (China); Univ. of Cambridge, Cambridge (United Kingdom)
- Carnegie Inst. of Washington, Washington, D.C. (United States)
- Univ. of Cambridge, Cambridge (United Kingdom); Center for High Pressure Science and Technology Advanced Research (HPSTAR), Shanghai (China)
- Deakin Univ., Waurn Ponds, VIC (Australia)
- Jilin Univ., Changchun (China)
Polymeric nitrogen, stabilized by compressing pure molecular nitrogen, has yet to be recovered to ambient conditions, precluding its application as a high-energy density material. Here we suggest a route for synthesis of a tetragonal polymeric nitrogen, denoted t-N, via He-N compounds at high pressures. Using first-principles calculations with structure searching, we predict a class of nitrides with stoichiometry HeN4 that are energetically stable (relative to a mixture of solid He and N2) above 8.5 GPa. At high pressure, HeN4 comprises a polymeric channel-like nitrogen framework filled with linearly arranged helium atoms. The nitrogen framework persists to ambient pressure on decompression after removal of helium, forming pure polymeric nitrogen, t-N. t-N is dynamically and mechanically stable at ambient pressure with an estimated energy density of ~11.31 kJ/g, marking it out as a remarkable high-energy density material. As a result, this expands the known polymeric forms of nitrogen and indicates a route to its synthesis.
- Research Organization:
- Energy Frontier Research Centers (EFRC), Washington, D.C. (United States). Energy Frontier Research in Extreme Environments (EFree)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
- Grant/Contract Number:
- NA0002006; SC0001057
- OSTI ID:
- 1470638
- Journal Information:
- Nature Communications, Journal Name: Nature Communications Journal Issue: 1 Vol. 9; ISSN 2041-1723
- Publisher:
- Nature Publishing GroupCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
catalysis (heterogeneous)
charge transport
energy storage (including batteries and capacitors)
hydrogen and fuel cells
materials and chemistry by design
mesostructured materials
phonons
solar (photovoltaic)
superconductivity
synthesis (novel materials)
thermoelectric
SUPERCONDUCTIVITY AND SUPERFLUIDITY
catalysis (heterogeneous)
charge transport
energy storage (including batteries and capacitors)
hydrogen and fuel cells
materials and chemistry by design
mesostructured materials
phonons
solar (photovoltaic)
superconductivity
synthesis (novel materials)
thermoelectric