Park, Sul Ki Kwon, Sung Hyun Lee, Seung Geol Choi, Min Sun Suh, Dong Hoon Nakhanivej, Puritut Lee, Hyunjoo Park, Ho Seok 2024-01-19T23:30:21Z 2024-01-19T23:30:21Z 2021-09-03 2018-03 2380-8195 https://pubs.kist.re.kr/handle/201004/121659 Despite the significant impact of sodium (Na) storage systems in terms of natural abundance and environmental friendliness, high-performance pseudocapacitive mterials in organic electrolytes remain challenging. Here, we demonstrate the pseudocapacitive Na-ion storage of hierarchically structured, phosphorus-incorporating steam-activated nanoporous carbons (P-aCNs) with improved rate and cyclic capabilities in organic electrolytes. The P-aCNs with a hierarchical honeycomb structure are derived from lignocellulosic biomass via a proposed synthetic process. The prominent pseudocapacitive behaviors of the P-containing groups in organic Na-ion electrolytes are confirmed by the surface area-independent and surface-confined capacitances, distinctive redox waves, and strong binding with Na-ions. In particular, the P-aCN demonstrates the cyclic stability of 96.0% over 100 000 cycles in the full cell, achieving a high capacitance of 265.43 F g(-1) and rate capability of 75%. These Na-ion pseudocapacitive features of P-aCNs arising from the hierarchical interconnected porosity and the redox-active P=O bonds are comprehensively investigated by experimental and computational analyses. English AMER CHEMICAL SOC REDOX CHARGE STORAGE STEAM ACTIVATION GRAPHENE PERFORMANCE NANOSHEETS NANOTUBES NITROGEN ELECTRODES REDUCTION MONOLITHS 10(5) Cyclable Pseudocapacitive Na-Ion Storage of Hierarchically Structured Phosphorus-Incorporating Nanoporous Carbons in Organic Electrolytes Article 10.1021/acsenergylett.8b00068 1 ACS ENERGY LETTERS, v.3, no.3, pp.724 - 732 ACS ENERGY LETTERS 3 3 724 732 scie scopus 000427444300034 2-s2.0-85043485859 Chemistry, Physical Electrochemistry Energy & Fuels Nanoscience & Nanotechnology Materials Science, Multidisciplinary Chemistry Electrochemistry Energy & Fuels Science & Technology - Other Topics Materials Science Article REDOX CHARGE STORAGE STEAM ACTIVATION GRAPHENE PERFORMANCE NANOSHEETS NANOTUBES NITROGEN ELECTRODES REDUCTION MONOLITHS