@article{oai:repository.lib.tottori-u.ac.jp:00007220,
 author = {Shimizu, Masahiro and Usui, Hiroyuki and Usui, Hiroyuki and Yamane, Kazuya and Sakata, Takuma and Nokami, Toshiki and Nokami, Toshiki and Itoh, Toshiyuki and Itoh, Toshiyuki and Sakaguchi, Hiroki and Sakaguchi, Hiroki and Shimizu, Masahiro and Yamane, Kazuya and Sakata, Takuma},
 issue = {12},
 journal = {International Journal of Electrochemical Science, International Journal of Electrochemical Science},
 month = {Nov},
 note = {The electrochemical Na-insertion/extraction properties of phosphorus as a Na-ion battery anode in ionic liquid electrolytes were investigated by using a thick film without any binder or conductive additive. The ionic liquid with more electrochemically-stable cation structure, 1-((2-methoxyethoxy)methyl)-1-methylpyrrolidinium bis(fluorosulfonyl)amide (Py1MEM-FSA), delivered a high reversible capacity of 310 mA h g−1 at the 100th cycle, whereas the phosphorus electrode in 1-ethyl-3-methylimidazolium bis(fluorosulfonyl)amide (EMI-FSA) showed a low capacity of only 110 mA h g−1. It was revealed that disintegration of the electrode after cycling was effectively suppressed by applying Py1MEM-FSA instead of an organic electrolyte including propylene carbonate (PC), and that a surface layer induced by the decomposition of EMI-FSA hindered Na-insertion into the active material layer. The performance obtained in Py1MEM-FSA was very superior to that in PC. We applied for the first time a closed-system fire-resistance test to the ionic liquid electrolyte for quantitatively evaluating its non-flammability. The Py1MEM-FSA-based electrolyte exhibited an excellent fire resistance in comparison with the PC-based organic electrolyte, which can be an advantage for realizing a Na-ion battery with a high-energy density and a high safety.},
 pages = {10132--10144},
 title = {Electrochemical Na-Insertion/Extraction Properties of Phosphorus Electrodes in Ionic Liquid Electrolytes},
 volume = {10},
 year = {2015}
}