@article{He2019,
title = {Anomalous neutron scattering ‘halo’ observed in highly oriented pyrolytic graphite},
author = {L. He and Chen W. Li and W.A. Hamilton and T. Hong and X. Tong and B.L. Winn and L. Crow and K. Bailey and N.C. Gallego},
url = {https://onlinelibrary.wiley.com/iucr/doi/10.1107/S1600576719001110},
doi = {10.1107/S1600576719001110},
year = {2019},
date = {2019-03-05},
journal = {Journal of Applied Cyrstallography},
volume = {52},
number = {2},
pages = {296-303},
abstract = {Highly oriented pyrolytic graphite (HOPG) has been used as monochromators, analyzers and filters at neutron and X-ray scattering facilities for more than half a century. Interesting questions remain. In this work, the first observation of anomalous neutron ‘halo’ scattering of HOPG is reported. The scattering projects a ring onto the detector with a half-cone angle of 12.4􏰁, which surprisingly persists to incident neutron wavelengths far beyond the Bragg cutoff for graphite (6.71 A ̊ ). At longer wavelengths the ring is clearly a doublet with a splitting roughly proportional to wavelength. Sample tilting leads to the shift of the ring, which is wavelength dependent with longer wavelengths providing a smaller difference between the ring shift and the sample tilting. The ring broadens and weakens with decreasing HOPG quality. The lattice dynamics of graphite play a role in causing the scattering ring, as shown by the fact that the ring vanishes once the sample is cooled to 30 K. A possible interpretation by multiple scattering including elastic and inelastic processes is proposed.},
keywords = {graphite, neutron scattering, phonon},
pubstate = {published},
tppubtype = {article}
}

@article{Li2018,
title = {Probing the electrolyte infiltration behaviour of activated carbon supercapacitor electrodes by in situ neutron scattering using aqueous NaCl as electrolyte},
author = {Yiqun Li and Chen W. Li and Cong Li and Yan Chen and Ke An and Kai Landskron},
url = {https://www.sciencedirect.com/science/article/pii/S0008622318304330?via%3Dihub},
doi = {10.1016/j.carbon.2018.04.072},
year = {2018},
date = {2018-04-24},
journal = {Carbon},
volume = {136},
pages = {139},
abstract = {In situcontrast-matched neutron scattering was used to probe the electrolyte infiltration behavior ofactivated supercapacitor carbon electrodes using an aquoeus 1 M NaCl solution. It was found that onlyabout 20% of the pore volume was infiltrated at chemical equilibrium. The partial infiltration can beattributed to the co-existence of hydrophilic and hydrophilic pores. The study suggests that for theachievement of optimal capacitance, supercapacitor electrodes should be evacuated before electrolyteinfiltration.},
keywords = {carbon, electrolyte, neutron scattering, super capacitor},
pubstate = {published},
tppubtype = {article}
}

@article{Haberl2017b,
title = {Wide-angle diamond cell for neutron scattering},
author = {Bianca Haberl and Sachith Dissanayake and Feng Ye and Luke L. Daemen and Yongqiang Cheng and Chen W. Li and A.-J. Ramirez-Cuesta and Masaaki Matsuda and Jamie J. Molaison and Reinhard Boehler},
url = {https://www.tandfonline.com/doi/full/10.1080/08957959.2017.1390571},
doi = {10.1080/08957959.2017.1390571},
year = {2017},
date = {2017-10-19},
journal = {High Pressure Research},
volume = {37},
number = {4},
pages = {495-506},
abstract = {A new diamond cell with extreme apertures is described. It is tailored for a large variety of neutron scattering techniques such as inelastic neutron scattering and single-crystal diffraction both at the Spallation Neutron Source (SNS) and the High Flux Isotope Reactor at the Oak Ridge National Laboratory. Simple springs enable forces of over 10 metric tons to be clamped in for low-temperature measurements. At present, low-cost polycrystalline diamond (Versimax) pressure anvils are used. We predict a routine pressure regime up to 20 GPa with sample volumes of ∼0.5 mm3. Future use of large CVD single-crystal diamond anvils will significantly expand this pressure range. We show examples for measurements at the SNAP, VISION and CORELLI beamlines of the SNS.},
keywords = {diamond anvil cell, diffraction, high pressure, neutron scattering},
pubstate = {published},
tppubtype = {article}
}