Lee, Taewoong Kwon, Woong Kang, Haisu Chae, Seongwook Kim, Eunji Kim, Jiyun Chae, Han Gi Lee, Albert S. Jeong, Euigyung Lee, Jin Hong Lee, Seung Geol 2024-01-19T12:32:27Z 2024-01-19T12:32:27Z 2022-04-03 2022-03 0008-6223 https://pubs.kist.re.kr/handle/201004/115587 Design of high energy density lithium storage materials is one of the everlasting issues in energy storage systems to realize a fully clean and sustainable energy grid. Here, 2,9-dimethyl quinacridone was selected as a precursor to prepare carbon-based electrode via low temperature heat-treatment process from 750 degrees C to 1050 degrees C. The pyro-polymerization of 2,9-dimethyl quinacridone induced a distinctive morphological transformation from rice husk-shaped 2,9-dimethyl quinacridone to carbon nanofibers. Electrode fabricated from pigment derived carbon nanofibers (PCNF) pyrolyzed at 750 degrees C maintained 878 mAh g-1 at a current density of 1 A g-1 and good Coulombic efficiency up to 98% after 1000 cycles. Furthermore, it delivered 337 mAh g-1 at a high current density of 25 A g-1. The superior performance was attributed to the stable structure of pristine 2,9-dimethyl quinacridone giving high thermal stability and crystallinity owing to well-defined pi-pi and hydrogen bonding interactions, thus rendering a stable microstructure with a large d-spacing of (002) plane of 3.580 angstrom, as well as efficient surface redox reactions. Density functional theory calculations indicated that the large interlayer distance could facilitate fast lithium ion insertion/extraction because of a similar to 38% lower energy barrier for lithium ion insertion than compared with graphite. (C) 2021 Elsevier Ltd. All rights reserved. English PERGAMON-ELSEVIER SCIENCE LTD Pyro-polymerization of organic pigments for superior lithium storage Article 10.1016/j.carbon.2021.11.036 1 CARBON, v.188, pp.187 - 196 CARBON 188 187 196 N scie scopus 000728540900010 2-s2.0-85120407131 Chemistry, Physical Materials Science, Multidisciplinary Chemistry Materials Science Article ANODE MATERIALS HARD CARBONS ION PYROLYSIS BATTERIES LI TEMPERATURE CHALLENGES INSERTION Lithium-ion battery Organic pigment Quinacridone Pyro-polymerization Carbon nanofiber