以NH4SCN为硫源,在水溶液中电沉积制备Ni3S2/Ni复合材料.利用EDS、SEM、XRD分别对该复合材料进行组分、形貌、晶体结构的表征与分析,并将所制备的复合材料与Li片组成电池,研究其电化学性能.结果表明NH4SCN的浓度对复合材料的形貌及电性...以NH4SCN为硫源,在水溶液中电沉积制备Ni3S2/Ni复合材料.利用EDS、SEM、XRD分别对该复合材料进行组分、形貌、晶体结构的表征与分析,并将所制备的复合材料与Li片组成电池,研究其电化学性能.结果表明NH4SCN的浓度对复合材料的形貌及电性能有显著的影响.如在NH4SCN浓度为0.1 mol/L时,该复合物由亚微米颗粒组成,此时的电化学性能最好,首次放电比容量达到240.4 m Ah/g,容量保持率为89.35%.展开更多
The growing global demands of safe, low-cost and high working voltage energy storage devices trigger strong interests in novel battery concepts beyond state-of-art lithium-ion battery. Herein, a dualion battery based ...The growing global demands of safe, low-cost and high working voltage energy storage devices trigger strong interests in novel battery concepts beyond state-of-art lithium-ion battery. Herein, a dualion battery based on nanostructured Ni_3S_2/Ni foam@RGO(NSNR) composite anode is developed, utilizing graphite as cathode material and LiPF6-VC-based solvent as electrolyte. The battery operates at high working voltage of 4.2–4.5 V, with superior discharge capacity of ~90 m A h g^(-1) at 100 mA g^(-1), outstanding rate performance, and long-term cycling stability over 500 cycles with discharge capacity retention of ~85.6%. Moreover, the composite simultaneously acts as the anode material and the current collector, and the corrosion phenomenon can be greatly reduced compared to metallic Al anode. Thus, this work represents a significant step forward for practical safe, low-cost and high working voltage dual-ion batteries,showing attractive potential for future energy storage application.展开更多
文摘以NH4SCN为硫源,在水溶液中电沉积制备Ni3S2/Ni复合材料.利用EDS、SEM、XRD分别对该复合材料进行组分、形貌、晶体结构的表征与分析,并将所制备的复合材料与Li片组成电池,研究其电化学性能.结果表明NH4SCN的浓度对复合材料的形貌及电性能有显著的影响.如在NH4SCN浓度为0.1 mol/L时,该复合物由亚微米颗粒组成,此时的电化学性能最好,首次放电比容量达到240.4 m Ah/g,容量保持率为89.35%.
基金supported by the National Natural Science Foundation of China (No. 51725401)the Fundamental Research Funds for the Central Universities (FRF-TP-15-002C1 and FRF-TP17-002C2)
文摘The growing global demands of safe, low-cost and high working voltage energy storage devices trigger strong interests in novel battery concepts beyond state-of-art lithium-ion battery. Herein, a dualion battery based on nanostructured Ni_3S_2/Ni foam@RGO(NSNR) composite anode is developed, utilizing graphite as cathode material and LiPF6-VC-based solvent as electrolyte. The battery operates at high working voltage of 4.2–4.5 V, with superior discharge capacity of ~90 m A h g^(-1) at 100 mA g^(-1), outstanding rate performance, and long-term cycling stability over 500 cycles with discharge capacity retention of ~85.6%. Moreover, the composite simultaneously acts as the anode material and the current collector, and the corrosion phenomenon can be greatly reduced compared to metallic Al anode. Thus, this work represents a significant step forward for practical safe, low-cost and high working voltage dual-ion batteries,showing attractive potential for future energy storage application.