Devina, Winda Cahyadi, Handi Setiadi Albertina, Ingrid Chandra, Christian Park, Jae-Ho Chung, Kyung Yoon Chang, Wonyoung Kwak, Sang Kyu Kim, Jaehoon 2024-01-19T12:31:42Z 2024-01-19T12:31:42Z 2022-04-14 2022-03 1385-8947 https://pubs.kist.re.kr/handle/201004/115543 The use of carbon-based supports, such as graphene and porous carbon, is a well-established approach to overcome the rapid capacity fading issues associated with alloy-based anode materials in lithium-ion batteries (LIBs). However, adopting carbonaceous materials that typically exhibit a low density eventually diminishes the primary purpose of alloys as high-energy-density anode materials. In this study, we introduce three-dimensional hierarchically porous molybdenum carbide (PMC) with high energy density, robust mechanical strength, and high electronic conductivity, which make it a promising alternative support for suppressing the huge volume expansion of alloying-based materials. Carbon-coated, ultrasmall Bi nanodots with an average size of 6.4 nm are uniformly embedded on the PMC surface (denoted as C-Bi/PMC) by facilitating heterogeneous nucleation. When tested as an anode in an LIB, the C-Bi/PMC electrode exhibits a high reversible capacity of 422 mAh g(-1) at 50 mA g(-1), high-rate capacity of 268 mAh g(-1) at 1000 mA g(-1), and long-term stability of 400 mAh g-1 at 250 mA g-1 over 500 cycles followed by 0.002 mAh g(-1)& nbsp;decay per cycle at 5000 mA g(-1)& nbsp;over subsequent 1000 cycles. When paired with LiNi0.5Co0.2Mn0.3O2 cathode as full-cell LIBs, the C-Bi/PMC anode deliver high gravimetric and volumetric energy densities of 352 Wh kg(-1) and 563 Wh L-1, respectively. In-situ X-ray diffraction patterns captured during cycling reveal that the Li+-ion insertion mechanism in the voltage plateau region at 0.7-1.0 V consists of the intercalation between Bi layers followed by the formation of triclinic LiBi phase and the subsequent transition of triclinic LiBi to cubic Li3Bi phase. English Elsevier BV High-energy-density carbon-coated bismuth nanodots on hierarchically porous molybdenum carbide for superior lithium storage Article 10.1016/j.cej.2021.134276 1 Chemical Engineering Journal, v.432 Chemical Engineering Journal 432 N scie scopus 000777268000005 2-s2.0-85122231449 Engineering, Environmental Engineering, Chemical Engineering Article QUANTITATIVE PHASE-ANALYSIS POWDER DIFFRACTION GRAPHENE OXIDE LI-ION ANODES PERFORMANCE SPHERES NANOPARTICLES CONVERSION Bismuth Molybdenum carbide Salt template Anode Lithium-ion batteries