Cho, Se Youn Kang, Minjee Choi, Jaewon Lee, Min Eui Yoon, Hyeon Ji Kim, Hae Jin Leal, Cecilia Lee, Sungho Jin, Hyoung-Joon Yun, Young Soo 2024-01-19T23:01:21Z 2024-01-19T23:01:21Z 2021-09-03 2018-04-26 1613-6810 https://pubs.kist.re.kr/handle/201004/121456 Na-ion cointercalation in the graphite host structure in a glyme-based electrolyte represents a new possibility for using carbon-based materials (CMs) as anodes for Na-ion storage. However, local microstructures and nanoscale morphological features in CMs affect their electrochemical performances; they require intensive studies to achieve high levels of Na-ion storage performances. Here, pyrolytic carbon nanosheets (PCNs) composed of multitudinous graphitic nanocrystals are prepared from renewable bioresources by heating. In particular, PCN-2800 prepared by heating at 2800 degrees C has a distinctive sp(2) carbon bonding nature, crystalline domain size of approximate to 44.2 angstrom, and high electrical conductivity of approximate to 320 S cm(-1), presenting significantly high rate capability at 600 C (60 A g(-1)) and stable cycling behaviors over 40 000 cycles as an anode for Na-ion storage. The results of this study show the unusual graphitization behaviors of a char-type carbon precursor and exceptionally high rate and cycling performances of the resulting graphitic material, PCN-2800, even surpassing those of supercapacitors. English WILEY-V C H VERLAG GMBH SMALL-ANGLE SCATTERING MICROPOROUS CARBON ELECTRON-MICROSCOPY BATTERIES SUPERCAPACITORS LITHIUM ANODE INTERCALATION NANOPARTICLES COMPOSITES Pyrolytic Carbon Nanosheets for Ultrafast and Ultrastable Sodium-Ion Storage Article 10.1002/smll.201703043 1 SMALL, v.14, no.17 SMALL 14 17 scie scopus 000430922100001 2-s2.0-85044766465 Chemistry, Multidisciplinary Chemistry, Physical Nanoscience & Nanotechnology Materials Science, Multidisciplinary Physics, Applied Physics, Condensed Matter Chemistry Science & Technology - Other Topics Materials Science Physics Article SMALL-ANGLE SCATTERING MICROPOROUS CARBON ELECTRON-MICROSCOPY BATTERIES SUPERCAPACITORS LITHIUM ANODE INTERCALATION NANOPARTICLES COMPOSITES anodes carbon nanosheets cointercalation pyrolytic carbon sodium ion batteries