Jung, Ji In Park, Sunwoo Ha, Son Cho, Se Youn Jin, Hyoung-Joon Yun, Young Soo 2024-01-19T13:34:14Z 2024-01-19T13:34:14Z 2021-10-21 2021-10 2637-9368 https://pubs.kist.re.kr/handle/201004/116354 Studies on three-dimensional structured carbon templates have focused on how to guide homogeneous lithium metal nucleation and growth for lithium metal anodes (LMAs). However, there is still insufficient evidence for a key factor to achieve their high electrochemical performance. Here, the effects of nanopores and sulfur doping on carbon-based nanoporous host (CNH) electrode materials for LMAs were investigated using natural polymer-derived CNHs. Homogeneous pore-filling behaviors of lithium metal in the nanopores of the CNH electrode materials were first observed by ex situ scanning electron microscopy analysis, where the protective lithium metal nucleation and growth process led to significantly high Coulombic efficiency (CE) of similar to 99.4% and stable 600 cycles. In addition, a comparison study of CNH and sulfur-doped CNH (S-CNH) electrodes, which differ only in the presence or absence of sulfur, revealed that sulfur doping can cause lower electrochemical series resistance, higher CE value, and better cycling stability in a wide range of current densities and number of cycles. Moreover, S-CNH-based LMAs showed high electrochemical performance in full-cell Li-S battery tests using a sulfur copolymer cathode, where a high energy density of 1370 W h kg(electrode)(-1) and an excellent power density of 4120 W kg(electrode)(-1) were obtained. English Wiley Effects of nanopores and sulfur doping on hierarchically bunched carbon fibers to protect lithium metal anode Article 10.1002/cey2.128 1 Carbon Energy, v.3, no.5, pp.784 - 794 Carbon Energy 3 5 784 794 Y scie scopus 000675017100001 2-s2.0-85110115402 Chemistry, Physical Energy & Fuels Nanoscience & Nanotechnology Materials Science, Multidisciplinary Chemistry Energy & Fuels Science & Technology - Other Topics Materials Science Article ELEMENTAL SULFUR RECHARGEABLE CELLS carbon template Li-S batteries lithium metal anode lithium metal batteries nanoporous carbon sulfur doping