Hybrid structured semiconductor nanomaterials possess excellent electrochemical performances owing to the synergistic effects from two components. Herein we report a novel CoMo;S;@Zn-Co-S core-shell structure as the e...Hybrid structured semiconductor nanomaterials possess excellent electrochemical performances owing to the synergistic effects from two components. Herein we report a novel CoMo;S;@Zn-Co-S core-shell structure as the electrode materials for asymmetric supercapacitor. The unique electrode structure is beneficial to rapid electron transport and the ion diffusion due to the existence of many vast channels.The as-synthesized core-shell structured electrode exhibits an overall improved electrochemical performance. Moreover, a quasi-solid state asymmetric supercapacitor is fabricated. It reveals a specific capacitance of 0.84 C/cm;collected at 4mA/cm;and an energy density of 1.87 mWh/cm;at a power density of 31.99 W/cm;.展开更多
In this paper, we modeled a core/shell/shell structure with cylindrical Schrodinger-Poisson coupled equation when a magnetic field is (and is not) applied along its axis. We showed the electron density is peaked near ...In this paper, we modeled a core/shell/shell structure with cylindrical Schrodinger-Poisson coupled equation when a magnetic field is (and is not) applied along its axis. We showed the electron density is peaked near the outer surface of the channel when the magnetic field is applied. Therefore one may make a nano-device which its electrons move only on its outer surface. Also we applied a gate voltage to the device and showed a higher threshold voltage (to turn on the device) is necessary when a magnetic field is applied. This is because of the increase in the lowest energy level similar to the size quantization. i.e a device with longer channel looks like a device with shorter channel if it is placed in a magnetic field parallel to its axis.展开更多
本文研究自组装单层保护金纳米团簇（C12 Au MPC）在常温下二氯甲烷溶液中的量子化电容充电效应．示差脉冲伏安曲线显示金核平均直径为2．0nm的C12 Au MPC在-0．6～0．6V电位区间内有9个明显的量子化电容充电峰，其双电层电容总的变化...本文研究自组装单层保护金纳米团簇（C12 Au MPC）在常温下二氯甲烷溶液中的量子化电容充电效应．示差脉冲伏安曲线显示金核平均直径为2．0nm的C12 Au MPC在-0．6～0．6V电位区间内有9个明显的量子化电容充电峰，其双电层电容总的变化趋势为在零电荷电位附近最小，随着电位正移或负移电容变大．而且随着该金核尺寸的增大，MPC双电层电容值也变大．展开更多
基金supported by State Key Laboratory of New Ceramic and Fine Processing Tsinghua University(No.KF201807)
文摘Hybrid structured semiconductor nanomaterials possess excellent electrochemical performances owing to the synergistic effects from two components. Herein we report a novel CoMo;S;@Zn-Co-S core-shell structure as the electrode materials for asymmetric supercapacitor. The unique electrode structure is beneficial to rapid electron transport and the ion diffusion due to the existence of many vast channels.The as-synthesized core-shell structured electrode exhibits an overall improved electrochemical performance. Moreover, a quasi-solid state asymmetric supercapacitor is fabricated. It reveals a specific capacitance of 0.84 C/cm;collected at 4mA/cm;and an energy density of 1.87 mWh/cm;at a power density of 31.99 W/cm;.
文摘In this paper, we modeled a core/shell/shell structure with cylindrical Schrodinger-Poisson coupled equation when a magnetic field is (and is not) applied along its axis. We showed the electron density is peaked near the outer surface of the channel when the magnetic field is applied. Therefore one may make a nano-device which its electrons move only on its outer surface. Also we applied a gate voltage to the device and showed a higher threshold voltage (to turn on the device) is necessary when a magnetic field is applied. This is because of the increase in the lowest energy level similar to the size quantization. i.e a device with longer channel looks like a device with shorter channel if it is placed in a magnetic field parallel to its axis.
文摘本文研究自组装单层保护金纳米团簇（C12 Au MPC）在常温下二氯甲烷溶液中的量子化电容充电效应．示差脉冲伏安曲线显示金核平均直径为2．0nm的C12 Au MPC在-0．6～0．6V电位区间内有9个明显的量子化电容充电峰，其双电层电容总的变化趋势为在零电荷电位附近最小，随着电位正移或负移电容变大．而且随着该金核尺寸的增大，MPC双电层电容值也变大．
