Selective Growth of Zn–Co–Se Nanostructures on Various Conductive Substrates for Asymmetric Flexible Hybrid Supercapacitor with Enhanced Performance,Advanced Materials Technologies

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Selective Growth of Zn–Co–Se Nanostructures on Various Conductive Substrates for Asymmetric Flexible Hybrid Supercapacitor with Enhanced Performance
Advanced Materials Technologies ( IF 6.4 ) Pub Date : 2019-12-20 , DOI: 10.1002/admt.201900873
Venkata Thulasivarma Chebrolu ₁ , Balamuralitharan Balakrishnan _{1,

2,

3} , Deviprasath Chinnadurai ₁ , Hee‐Je Kim ₁

Affiliation

Hybrid supercapacitors have received great interest in the field of electric vehicles and wearable electronic devices. However, developing new electrode material with high capacity and supporting substrates with good stability is still a big challenge. Herein, a facile electrodeposition technique is applied to grow Zn–Co–Se on various conductive substrates for hybrid supercapacitor. Among all, NF‐supported Zn–Co–Se electrode shows a high specific capacitance of 313.45 C g⁻¹ and good cyclical stability of 95% retention over 3000 cycles. Interestingly, the assembled hybrid supercapacitor (Zn–Co–Se @Graphene–Ink) as the core and the outer electrode yield an ultrahigh energy density of ≈16.97 W h kg⁻¹ at a power density of ≈539.63 W kg⁻¹ with a maximum operating voltage of 1.6 V. Even at high power density of 13 499 W kg⁻¹, the energy density can still retain 7.76 W h kg⁻¹ with excellent cycling performance of 95% of capacity maintenance after 5000 cycles. For the real‐time applications, a series of two ASC devices could light up blue and green (LEDs) with high intensity and a multifunction sensor monitoring time with temperature and humidity is operated. Hence, the work presents a fresh route for designing metal selenides for energy storage and conversion applications.

中文翻译：

具有增强性能的非对称柔性混合超级电容器在各种导电基底上选择性生长Zn-Co-Se纳米结构

混合超级电容器已经在电动汽车和可穿戴电子设备领域引起了极大的兴趣。然而，开发具有高容量的新型电极材料以及具有良好稳定性的支撑基板仍然是很大的挑战。在这里，一种简便的电沉积技术被应用于在混合超级电容器的各种导电基板上生长Zn-Co-Se。其中，由NF支撑的Zn-Co-Se电极在313个循环中显示出313.45 C g ^-1的高比电容和95％保留率的良好循环稳定性。有趣的是，组装混合超级电容器（锌-钴-硒@石墨烯的墨）为核心和外部电极产生≈16.97W时公斤的超高能量密度^-1在≈539.63W¯¯公斤的功率密度^-1最大工作电压为1.6V。即使在13 499 W kg ^-1的高功率密度下，能量密度仍可保持7.76 W h kg ^-1，具有出色的循环性能，可在5000次循环后保持95％的容量。对于实时应用，一系列两个ASC设备可以高强度地点亮蓝色和绿色（LED），并且可以运行多功能传感器来监视温度和湿度的时间。因此，这项工作为设计用于能量存储和转换应用的金属硒化物提供了一条新途径。

更新日期：2020-02-10

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