Curved Nanographene-Graphite Hybrid Anodes with Sequential Li+ Insertion for Fast-Charging and Long-Life Li-Ion Batteries
- Authors
- Cha, Hyunji; Kang, Minsung; Oh, Seung Hak; Ha, Jee Ho; Joo, Jeongmi; Kwon, Dae Hyeon; Kwak, Sang Kyu; Ahn, Seok hoon; Kang, Seok Ju
- Issue Date
- 2025-09
- Publisher
- John Wiley & Sons Ltd.
- Citation
- Advanced Functional Materials
- Abstract
- Graphite remains the most widely used anode material for lithium-ion batteries (LIBs). However, improvements are essential to meet the demand for high-performance anodes in full-cell configurations. Here, the synergistic electrochemical performance of a curved nanographene?graphite hybrid anode composed of mesocarbon microbeads (MCMB) is investigated, and Cl-substituted contorted hexabenzocoronene (Cl-cHBC), designed to improve the specific capacity, rate capability, and cycling stability. The optimized 1:1 blend forms a homogeneous morphology, in which sphere-like MCMB particles are uniformly embedded within needle-like Cl-cHBC crystals without macrophase separation. This architecture enables sequential Li-ion insertion and leads to a synergistic improvement in the electrochemical performance. In a half-cell, the hybrid anode achieves 100 mAh g?1 at 4 A g?1, outperforming the pristine MCMB graphite (?20 mAh g?1 at 4 A g?1). In full-cells paired with a single-crystal LiNi1-y-zCoyMnzO2811 cathode, it shows exceptional rate capability (?100 mAh g?1 at 5 C) and stability (70% capacity retention after 1000 cycles at 5 C). Furthermore, a pouch cell incorporating the hybrid anode delivers 115 mAh g?1 at 1 C and stable performance over 2100 cycles with a Coulombic efficiency of 99%. These results demonstrate the practical potential of sequential Li-ion insertion into Cl-cHBC/MCMB composites for high-performance LIB applications.
- Keywords
- ORGANIC ELECTRODE MATERIALS; SILICON; CHALLENGES; COMPOSITE; organic anode; contorted hexabenzocoronene; curved nanographene; hybrid anode; Li-ion battery
- ISSN
- 1616-301X
- URI
- https://pubs.kist.re.kr/handle/201004/153225
- DOI
- 10.1002/adfm.202514795
- Appears in Collections:
- KIST Article > Others
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