Zn‐Ion Hybrid Micro‐Supercapacitors with Ultrahigh Areal Energy Density and Long‐Term Durability,Advanced Materials

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Zn‐Ion Hybrid Micro‐Supercapacitors with Ultrahigh Areal Energy Density and Long‐Term Durability
Advanced Materials ( IF 27.4 ) Pub Date : 2018-11-27 , DOI: 10.1002/adma.201806005
Panpan Zhang _{1,

2} , Yang Li _{3,

4} , Gang Wang _{1,

2} , Faxing Wang _{1,

2} , Sheng Yang _{1,

2} , Feng Zhu _{3,

4} , Xiaodong Zhuang _{1,

2,

5} , Oliver G. Schmidt _{2,

3,

4} , Xinliang Feng _{1,

2,

5}

Affiliation

On‐chip micro‐supercapacitors (MSCs), as promising power candidates for microdevices, typically exhibit high power density, large charge/discharge rates, and long cycling lifetimes. However, as for most reported MSCs, the unsatisfactory areal energy density (<10 µWh cm⁻²) still hinders their practical applications. Herein, a new‐type Zn‐ion hybrid MSC with ultrahigh areal energy density and long‐term durability is demonstrated. Benefiting from fast ion adsorption/desorption on the capacitor‐type activated‐carbon cathode and reversible Zn stripping/plating on the battery‐type electrodeposited Zn‐nanosheet anode, the fabricated Zn‐ion hybrid MSCs exhibit remarkable areal capacitance of 1297 mF cm⁻² at 0.16 mA cm⁻² (259.4 F g⁻¹ at a current density of 0.05 A g⁻¹), landmark areal energy density (115.4 µWh cm⁻² at 0.16 mW cm⁻²), and a superb cycling stability without noticeable decay after 10 000 cycles. This work will inspire the fabrication and development of new high‐performance microenergy devices based on novel device design.

中文翻译：

锌离子混合微型超级电容器，具有超高的面能密度和长期耐用性

片上微型超级电容器（MSC）作为微型设备的有希望的功率候选者，通常表现出高功率密度，大充电/放电速率和长循环寿命。然而，对于大多数报道的MSC而言，不令人满意的面能量密度（<10 µWh cm ^-2）仍然阻碍了它们的实际应用。本文展示了具有超高面能量密度和长期耐用性的新型Zn离子混合MSC。得益于电容器型活性炭阴极上的快速离子吸附/解吸以及电池型电沉积锌纳米片阳极上可逆的锌剥离/镀覆，所制造的Zn离子混合MSC表现出显着的1297 mF cm ^-2的面电容。在0.16 mA cm ^-2（259.4 F g ^-1在0.05甲g的电流密度^-1），地标分布区的能量密度（115.4μWh厘米^-2 0.16毫瓦厘米^-2），并且没有明显的衰减10 000次循环后的极好的循环稳定性。这项工作将激发基于新颖设备设计的新型高性能微能源设备的制造和开发。

更新日期：2018-11-27

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