Cobalt‐based zeolitic imidazole framework derived hollow Co3S4 nanopolyhedrons for supercapacitors

• DOI: 10.1002/aoc.7533
• Publication Date: 2024-05-28T05:44:25Z
• Authors: Maiyong Zhu; Yu Yang; Xun Zhang; Yiming Liang; Jingjing Tang
• Keywords: Imidazole

Transition metal sulfides with designed nanostructures are expected to provide superior electrochemical performance when used as electrode materials for pseudocapacitors compared their oxide counterparts. In this paper, hollow Co 3 S 4 dodecahedra were successfully prepared using cobalt‐based zeolite imidazolium skeleton (ZIF‐67) the precursor and thioacetamide (TAA) sulfur source combined a facile one‐step vulcanization process. The cavity structure not only shortens carrier transport distance but also provides higher specific surface area abundant active sites, which promotes an efficient mass transfer addition, synthesis of has greater advantages than in terms cost control process simplification. capacitance produced nanopolyhedra was 668 F/g at 1 A/g remained 353 10 pseudocapacitor electrode, demonstrating its multiplication capability. retention is 86.4% after 5000 cycles A/g, indicating long cycle stability. Notably, employing commercial activated carbon negative as‐prepared polyhedrons positive assembled asymmetry supercapacitor device delivers high energy density 20.7 Wh/kg power 716 kW/kg. value remains up 81.4% 2000 charging/discharging cycles. simple opens new opportunities develop advanced exhibiting potential various applications.