Molybdenum diboride/reduced graphene oxide hybrid anodes with enhanced electrochemical performance for lithium-ion batteries
Ceramics International, 2026 (SCI-Expanded, Scopus)
- Yayın Türü: Makale / Tam Makale
- Basım Tarihi: 2026
- Doi Numarası: 10.1016/j.ceramint.2026.09.285
- Dergi Adı: Ceramics International
- Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Chemical Abstracts Core, Compendex, INSPEC, Academic Search Ultimate (EBSCO), Engineering Source (EBSCO)
- Anahtar Kelimeler: Anode materials, Lithium-ion batteries, Microwave synthesis, Molybdenum diboride, Reduced graphene oxide
- Hacettepe Üniversitesi Adresli: Evet
Özet
In this study, molybdenum diboride/reduced graphene oxide (MoB2@rGO) hybrid composites were developed as high-performance anode materials for lithium-ion batteries (LIBs). The β-MoB2 phase was successfully synthesized via both a conventional solid-state route (900 °C, 8 h) and a rapid microwave-assisted method (500 W, 5 min). During synthesis, tin (Sn) was utilized as a molten metal flux to promote diffusion kinetics and reactivity, thereby facilitating the formation of the phase-pure product. The β-MoB2 particles were integrated into a graphene oxide network through freeze-casting, followed by thermal reduction to yield MoB2@rGO composites. Structural characterization using FT-IR, XRD, Raman, and SEM revealed that microwave synthesis produced smaller crystallite sizes with increased structural disorder, whereas the solid-state method yielded materials with higher crystallinity. Electrochemical evaluations demonstrated that rGO integration significantly enhanced the electrochemical capacity and cycling stability. The solid-state derived hybrid anode (SS-MoB2@rGO) exhibited a superior initial discharge capacity of 1369 mAh g−1, while the microwave-derived hybrid (MW-MoB2@rGO) reached 1200 mAh g−1. After 50 cycles, the SS-MoB2@rGO anode maintained a capacity of 954 mAh g−1, demonstrating excellent stability. These results indicate that the porous MoB2 structure and the high conductivity of the rGO network act synergistically to accelerate Li + diffusion and mitigate structural degradation. A key feature of this work is the rapid microwave-assisted formation of phase-pure β-MoB2 within 5 min while retaining favorable electrochemical performance. The solid-state route provides higher storage capacity, whereas the microwave-derived material exhibits faster charge-transfer kinetics. In both cases, incorporation of rGO improves the electrochemical performance of the MoB2-based electrodes.