목록 Method of manufacturing hollow-type carbon nanoparticles, and method of manufacturing anode for sodium secondary battery using the same Author Inventor : C. Jo, Y. Mun and J. Lee 특허번호 Korean patent field: 10-2016-0114957 (Sept. 7, 2016), patent number: 10-1797390 (Nov. 7, 2017) Year 2017 .