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Redox Route from Inorganic Precursor Li2C2 to Nanopatterned Carbon

MPS-Authors
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Simon,  Paul
MPI for Polymer Research, Max Planck Society;

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Feng,  Xian-Juan
Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Bobnar,  Matej
Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Höhn,  Peter
Peter Höhn, Chemical Metal Science, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Schwarz,  Ulrich
Ulrich Schwarz, Chemical Metal Science, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Carrillo-Cabrera,  Wilder
Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Baitinger,  Michael
Michael Baitinger, Chemical Metal Science, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Grin,  Yuri
Juri Grin, Chemical Metal Science, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Citation

Simon, P., Feng, X.-J., Bobnar, M., Höhn, P., Schwarz, U., Carrillo-Cabrera, W., et al. (2017). Redox Route from Inorganic Precursor Li2C2 to Nanopatterned Carbon. ACS Nano, 11(2), 1455-1465. doi:10.1021/acsnano.6b06721.


Cite as: https://hdl.handle.net/11858/00-001M-0000-002C-E05E-F
Abstract
We present the synthesis route to carbon with hierarchical morphology on the nanoscale. The structures are generated using crystalline orthorhombic lithium carbide (Li2C2) as precursor with nanolamellar organization. Careful treatment by SnI4 oxidizes carbon at the fairly low temperature of 80 degrees C to the elemental state and keeps intact the initial crystallite shape, the internal lamellar texture of particles, and the lamellae stacking. The reaction product is amorphous but displays in the microstructure parallel band-like arrangements with diameters in the range of 200-500 nm. These bands exhibit internal fine structure made up by thin strips of about 60 nm width running inclined with respect to the long axis of the band. The stripes of neighboring columns sometimes meet and give rise to arrow like arrangements in the microstructure. This is an alternative preparation method of nanostructured carbon from an inorganic precursor by a chemical redox route without applying physical methods such as ion implantation, printing, or ablation. The polymerization reaction of the triple bond of acetylide anions gives rise to a network of carbon sp(2) species with statistically sized and distributed pores with diameters between 2 and 6 angstrom resembling zeolite structures. The pores show partially paracrystal-like ordering and may indicate the possible formation of carbon species derived from graphitic foams.