Glycerol-assisted synthesis of CoSO4 from Co(BF4)2 through a fluorinated precursor route toward high-performance hybrid energy storage

บทความในวารสาร

ผู้เขียน/บรรณาธิการ

กลุ่มสาขาการวิจัยเชิงกลยุทธ์

รายละเอียดสำหรับงานพิมพ์

รายชื่อผู้แต่ง: Kuo, T.-R.; Chen, G.-L.; Chuang, B.-Y.; Kongvarhodom, C.; Yougbaré, S.; Saukani, M.; Chen, H.-M.; Lin, L.-Y.

ผู้เผยแพร่: Elsevier

ปีที่เผยแพร่ (ค.ศ.): 2026

Volume number: 141

หน้าแรก: 119370

นอก: 2352-152X

eISSN: 2352-1538

URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-105021579368&doi=10.1016%2Fj.est.2025.119370&partnerID=40&md5=876bfabaffee090958b26e874273879d

ภาษา: English-Great Britain (EN-GB)

ดูบนเว็บไซต์ของสำนักพิมพ์

บทคัดย่อ

Cobalt glycerate (Co-G) has emerged as a promising precursor material for battery–supercapacitor hybrids (BSHs), owing to its porous architecture, large surface area, and redox-active cobalt sites. The choice of cobalt precursor significantly affects the resultant phase composition and structural evolution. In this study, cobalt tetrafluoroborate (Co(BF4)2) is adopted as a fluorine-rich cobalt source to promote the in-situ formation of cobalt fluoride (CoF2) during glycerol-mediated synthesis. Varying glycerol volumes enables control over particle morphology and crystallization behavior, influencing ion diffusion and electrochemical response. Post treatments are further applied to tune material properties, including thermal calcination in air that improves the crystallinity and phase purity of CoF2 (Co-G4-O) and solvothermal sulfurization that transforms the precursor into CoSO4 (Co-G4-S). The Co-G4-S electrode achieves a superior specific capacitance (CF) of 1180.4 F/g at 10 mV/s, compared to those of Co-G4-O (423.4 F/g) and untreated Co-G (344.8 F/g). A BSH with a Co-G4-S positive electrode delivers a maximum energy density of 15.7 Wh/kg at 600 W/kg, and maintains 85.6% of its initial capacitance and Coulombic efficiency of 90.4% after 10,000 cycles. These results underscore the importance of precursor selection, glycerol-mediated synthesis control, and post-treatment modification in optimizing cobalt-based materials for high-performance hybrid energy storage. © 2025

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