Jang, Wooree Kim, Jongmin Lee, Seoyun Ahn, Seokhoon Koo, Hyeyoung Yang, Cheol-Min 2025-01-07T05:30:09Z 2025-01-07T05:30:09Z 2024-12-30 2025-02 1359-8368 https://pubs.kist.re.kr/handle/201004/151483 In this study, to enhance the electrochemical performance of graphene-based anodes for Li-ion batteries (LIBs), we synthesized an all-carbonaceous N/S co-doped nanocomposite of graphene oxide (GO) and graphene-like small organic molecules (GOM) using a mild, eco-friendly, one-step hydrothermal method with thiourea (CH4N2S) (denoted as h-N/S-GO/GOM). The thiourea facilitated N/S co-doping and π−π bonding, which improved the interaction between hydrophilic GO and hydrophobic GOM in aqueous solution. Notably, the formation of π−π bonds between GO and GOM created pathways that enhanced electron transfer, thereby promoting efficient Li-ion transport from the electrolyte through the channels during rapid charge–discharge cycles. Additionally, the functional groups resulting from N/S co-doping increased the number of active sites within the nanocomposite. Consequently, the h-N/S-GO/GOM anode demonstrated superior electrochemical performance, achieving an average reversible capacity of 1265 mAh g−1 at 0.1 A g−1 and retaining 83.0 % of its capacity after 200 cycles. Furthermore, the nanocomposite exhibited excellent long-term cycling stability, maintaining a capacity of 688 mAh g−1 even after 1000 cycles at a high current density of 1.0 A g−1. The hierarchical network structure of the all-carbonaceous h-N/S-GO/GOM anode facilitated efficient charge transfer between the electrode and electrolyte through shorter diffusion paths for Li-ion transport and provided additional active sites, contributing to its outstanding electrical performance. The h-N/S-GO/GOM nanocomposite represents a promising alternative to traditional graphite-based anodes, offering a path toward high-performance, eco-friendly LIBs suitable for applications such as electric vehicles and energy storage systems. English Pergamon Press Ltd. N/S co-doped nanocomposite of graphene oxide and graphene-like organic molecules as all-carbonaceous anode material for high-performance Li-ion batteries Article 10.1016/j.compositesb.2024.111994 1 Composites Part B: Engineering, v.291 Composites Part B: Engineering 291 Y scie scopus 001373281600001 2-s2.0-85210402930 Engineering, Multidisciplinary Materials Science, Composites Engineering Materials Science Article GRAPHITE SHEETS REDUCTION ELECTRODE STORAGE NANOPARTICLES NANOSHEETS FUNCTIONALIZED GRAPHENE HIGH-CAPACITY ANODE ELECTROCHEMICAL PERFORMANCE Li-ion battery Graphene oxide Graphene-like organic molecules All carbonaceous anode All carbonaceous anode N/S co-doping