MoS 2 Nanoflakes based Kilohertz Electrochemical Capacitors
MoS 2 Nanoflakes based Kilohertz Electrochemical Capacitors
复制标题
基于 MoS 2 纳米片的千赫兹电化学电容器
DOI：
10.1002/batt.202300363
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发表时间：
2023
影响因子：
5.7
通讯作者：
Fan, Zhaoyang
中科院分区：
文献类型：
--
作者：
Bal, Sourayan;Baranwal, Rishav;Lin, Xueyan;Li, Wenyue;Yang, Shize;Islam, Nazifah;Fan, Zhaoyang
设计用于有效涟漪电流平滑的超快速电化学电容器（EC）使用沉积在独立的纤维素（CC）片上的垂直取向的MoS 2（VOM）纳米片作为电极来制造。将日常使用的纤维素薄页纸通过预热炉内的快速热解过程转化为电极支架，在常规水热过程中在其上形成VOM纳米片。利用这些厚度约为10 μm的VOM-CC电极，制备了具有可调谐频率响应和比电容密度的超快EC。 在120 Hz下，细胞水平面电容密度为0.8 mF/cm 2的EC被证明用于60 Hz至60 kHz的涟漪电流滤波。 在较低的频率响应水平下，EC电池具有4.8 mF/cm 2的大电容密度。 由于生产纳米结构电极的工艺简单且易于按比例放大，因此小型化的VOM-CC基EC有可能取代大体积的铝电解电容器用于电流平滑和脉冲功率应用。
An ultra‐fast electrochemical capacitor (EC) designed for efficient ripple current smoothing was fabricated using vertically oriented MoS2(VOM) nanoflakes deposited on freestanding carbonized cellulose (CC) sheets as electrodes. The daily used cellulose tissue sheets were transformed into electrode scaffolds through a rapid pyrolysis process within a preheated furnace, on which VOM nanoflakes were formed in a conventional hydrothermal process. With these ~10 μm thick VOM‐CC electrodes, ultrafast ECs with tunable frequency response and specific capacitance density were fabricated. The ECs with a cell‐level areal capacitance density of 0.8 mF/cm2at 120 Hz were demonstrated for ripple current filtering from 60 Hz to 60 kHz. At a lower frequency response level, EC cell with a large capacitance density of 4.8 mF/cm2was also demonstrated. With the facile and easily scaled up process to producing the nanostructured electrode, the miniaturized VOM‐CC based ECs have the potential to substitute the bulky aluminum electrolytic capacitors for current smoothing and pulse power applications.