首页|One-step construction of strongly coupled Co3V2O8/Co3O4/MXene heterostructure via in-situ Co-F bonds for high performance all-solid-state asymmetric supercapacitors
One-step construction of strongly coupled Co3V2O8/Co3O4/MXene heterostructure via in-situ Co-F bonds for high performance all-solid-state asymmetric supercapacitors
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Co3V2O8/Co3O4/Ti3C2Tx composite was easily synthesized via one-step succinct-operated hydrothermal process.The interconnected Co3V2O8/Co3O4 nanowires network can in-situ grow and anchor on the surface of Ti3C2Tx via the strong Co-F bonds and contribute tremendously to depress Ti3C2Tx self-restacking.Profiting from the synergistically interplayed effect among the multiple interfaces and high conductivity of Ti3C2Tx as well as outstanding stability of the as-designed nanostruc-ture,the optimum Co3V2O8/Co3O4/Ti3C2Tx electrode reaches a commendable specific capacitance(up to 3800 mF·cm-2),great rate capability(80％capacitance retention after 20-times current increasing),and preeminent cycling stability(95.4％/85.5％retention at 7000th/20,000th cycle).Moreover,the all-solid-state asymmetric supercapacitor based on Co3V2O8/Co3O4/Ti3C2Tx and active carbon can deliver a high energy density of 84.0 pWh·cm-2 at the power energy of 3.2 mW·cm-2,and excellent cycling durability with 87.0％of initial capacitance retention upon 20,000 loops.This work pro-vides a practicable pathway to tailor MXene-based com-posites for high-performance supercapacitor.
Ji Zhou、Bin-Bin Liu、Hu Zheng、Wen-Qing Ma、Qian Li、Cai-Xia Xu
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Institute for Advanced Interdisciplinary Research(iAIR),Collaborative Innovation Center of Technology and Equipment for Biological Diagnosis and Therapy in Universities of Shandong,School of Chemistry and Chemical Engineering,University of Jinan,Jinan 250022,China
国家自然科学基金山东省自然科学基金山东省自然科学基金Project of"20 items of University"of JinanTaishan Scholar Project of Shandong Province
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