Choi, Jaewon Lee, Min Eui Lee, Sungho Jin, Hyoung-Joon Yun, Young Soo 2024-01-19T21:01:16Z 2024-01-19T21:01:16Z 2021-09-02 2019-02 2574-0962 https://pubs.kist.re.kr/handle/201004/120417 In this study, low-density, hard-carbon fibers incorporating multitudinous closed pores with few-nanometer-scale widths were prepared from waste silk fabric by a simple high-temperature heating process (2000 degrees C). The pyroprotein carbon fibers exhibited a significantly high single-plateau capacity of 300 mA h g(-1) at similar to 0.1 V Na+/Na, a high initial Coulombic efficiency of, similar to 91.9%, and stable cycling behaviors of more than 200 cycles when used as the anode of a sodium ion battery. Characterization using in situ X-ray diffraction patterns and ex situ field-emission transmission electron microscopy confirmed that the outstanding charge storage behaviors of the pyroprotein carbon fibers are based on sodium-metal nanoclustering in the closed pores. Moreover, full cells assembled with the pyroprotein carbon-fiber-based anode and a reported cathode demonstrated their practical electrochemical performances, including a specific energy of 262 Wh kg(-1). English AMER CHEMICAL SOC ANODE MATERIAL NA ELECTRODES INSERTION INSIGHTS GRAPHENE STORAGE Pyroprotein-Derived Hard Carbon Fibers Exhibiting Exceptionally High Plateau Capacities for Sodium Ion Batteries Article 10.1021/acsaem.8b01734 1 ACS APPLIED ENERGY MATERIALS, v.2, no.2, pp.1185 - 1191 ACS APPLIED ENERGY MATERIALS 2 2 1185 1191 scie scopus 000459948900030 2-s2.0-85064969445 Chemistry, Physical Energy & Fuels Materials Science, Multidisciplinary Chemistry Energy & Fuels Materials Science Article ANODE MATERIAL NA ELECTRODES INSERTION INSIGHTS GRAPHENE STORAGE carbon fiber pyroprotein hard carbon anode sodium-ion batteries