A true cable assembly with a carbon nanotube sheath and nickel wire core: a fully flexible electrode integrating energy storage and electrical conduction†,Journal of Materials Chemistry A

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A true cable assembly with a carbon nanotube sheath and nickel wire core: a fully flexible electrode integrating energy storage and electrical conduction†
Journal of Materials Chemistry A ( IF 10.7 ) Pub Date : 2017-12-12 00:00:00 , DOI: 10.1039/c7ta08758f
Huating Ye _{1,

2,

3,

4,

5} , Kai Wang _{4,

5,

6,

7} , Juntao Zhou _{4,

5,

6,

7} , Li Song _{4,

6,

7,

8} , Li Gu _{4,

5,

6,

7} , Xuebo Cao _{4,

6,

7,

8}

Affiliation

Fiber-shaped supercapacitors integrating energy storage and electrical conduction are new forms of energy supplying devices that would occupy minimum space and would be of minimum cost. The bottleneck in this field is the lack of structurally innovative electrode materials. Herein, we describe a fully flexible cable with excellent mechanical strength and conductivity. The sheath of the cable is composed of an interconnected carbon nanotube (CNT) network with a packing density comparable to highly aligned CNT forests, which is directly coupled to the underlying Ni wire core via a spontaneous solution process with scalability on an industrial scale. The wire-shaped capacitors using two parallel CNT@Ni cables and KOH/polyvinyl alcohol gel electrolyte offer remarkable electrochemical performances, including a wide voltage window (>1.4 V), high volumetric capacitance (13.8 mF cm⁻³ at 95 mA cm⁻³), and long cycle life. Moreover, the device can deliver an energy density of 3.8 mW h cm⁻³ and a power density of 1590 mW cm⁻³. The energy density is comparable to that of a 4 V/500 μA h thin-film lithium battery, while the power density is two orders of magnitude higher than that of the battery. More impressively, the CNT@Ni cable-based supercapacitor can utilize the Ni wire to transport the energy while storing charges in the CNT sheath simultaneously.

中文翻译：

真正的电缆组件，带有碳纳米管护套和镍丝芯：集成了能量存储和导电性能的完全柔性电极†

集成了能量存储和导电性的纤维状超级电容器是能量供应设备的新形式，其将占据最小的空间并且具有最小的成本。该领域的瓶颈是缺乏结构创新的电极材料。本文中，我们描述了一种具有出色机械强度和导电性的全柔性电缆。电缆的护套由互连的碳纳米管（CNT）网络组成，其堆积密度可与高度对齐的CNT林相媲美，后者直接通过下面的Ni线芯耦合。具有工业规模可扩展性的自发解决方案过程。利用两个平行的CNT @镍电缆和KOH /聚乙烯醇凝胶电解质提供卓越的电化学性能，包括一个宽的电压窗口（> 1.4V），高体积电容（13.8厘米μF的丝线状电容器^-3在95毫安厘米^-3），循环寿命长。此外，该设备可以提供3.8 mW h cm ^-3的能量密度和1590 mW cm ^-3的功率密度。能量密度与4 V / 500μAh薄膜锂电池的能量密度相当，而功率密度比电池的能量密度高两个数量级。更令人印象深刻的是，基于CNT @ Ni电缆的超级电容器可以利用Ni线来传输能量，同时将电荷同时存储在CNT护套中。

更新日期：2017-12-12

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