当前位置：
X-MOL 学术
›
J. Mater. Chem. A
›
论文详情
Our official English website, www.x-mol.net, welcomes your
feedback! (Note: you will need to create a separate account there.)
Hierarchically porous sheath–core graphene-based fiber-shaped supercapacitors with high energy density
Journal of Materials Chemistry A ( IF 10.7 ) Pub Date : 2017-11-06 00:00:00 , DOI: 10.1039/c7ta08362a Xianhong Zheng 1, 2, 3, 4, 5 , Kun Zhang 1, 2, 3, 4, 5 , Lan Yao 1, 2, 3, 4, 5 , Yiping Qiu 1, 2, 3, 4, 5 , Shiren Wang 6, 7, 8, 9
Journal of Materials Chemistry A ( IF 10.7 ) Pub Date : 2017-11-06 00:00:00 , DOI: 10.1039/c7ta08362a Xianhong Zheng 1, 2, 3, 4, 5 , Kun Zhang 1, 2, 3, 4, 5 , Lan Yao 1, 2, 3, 4, 5 , Yiping Qiu 1, 2, 3, 4, 5 , Shiren Wang 6, 7, 8, 9
Affiliation
|
Owing to their high power density, fast charge/discharge rate, ultralong cycling life and safe operating conditions, all-carbon fiber-shaped supercapacitors (FSSCs) hold great promise for powering wearable electronics. However, their low energy density hinders them from practical application, due to the absence of effective approaches for highly electrically conductive fiber electrodes with high specific capacitance. Herein, we develop a scalable and cost-effective strategy towards hierarchically porous core–sheath graphene-based fiber electrodes with a rational PSD (88–97% micropores, 0–8.3% mesopores and 1.9–4.2% macropores) and high SSA (up to 416.4 m2 g−1). The hierarchical architecture is achieved by simply decorating graphene fiber with carbonized phenol formaldehyde (CPF) resin containing small-size (∼156 nm in diameter) graphene (SG), wherein the incorporation of CPF and SG synergistically provides ultrahigh micro-porosity with narrowed micro-/meso-PSDs and enhanced electrical conductivity, facilitating ion storage and transport. The assembled FSSCs exhibit an ultrahigh specific areal capacitance of 391.2 mF cm−2 in polyvinyl alcohol/H2SO4 electrolyte at 0.1 mA cm−2 in a two-electrode cell, which is 17 times that of graphene fibers. The entire-device energy density Ecell,A is 8.7 μW h cm−2 in aqueous electrolyte and 66.4 μW h cm−2 at an areal power density of 0.54 mW cm−2 in organic electrolyte. Moreover, the FSSCs also show ultralong cycling life (98.9% capacitance retention after 7000 cycles) and good flexibility. All these results have made it one of the best ever reported all-carbon FSSCs to date. This work may shed light on mass-manufacturing low-cost but high-performance wearable fiber-shaped energy storage devices.
中文翻译：
具有高能量密度的多层多孔皮芯石墨烯基纤维状超级电容器
由于具有高功率密度，快速的充电/放电速率，超长的循环寿命和安全的工作条件，全碳纤维形状的超级电容器（FSSC）有望为可穿戴电子设备供电。然而，由于缺乏有效的方法用于具有高比电容的高导电性纤维电极，它们的低能量密度阻碍了它们的实际应用。本文中，我们针对具有合理PSD（88-97％的微孔，0-8.3％的中孔和1.9-4.2％的大孔）和高SSA（向上）的分层多孔核-鞘层石墨烯基纤维电极开发了一种可扩展且具有成本效益的策略。至416.4 m 2 g -1）。通过简单地用包含小尺寸（直径约156 nm）石墨烯（SG）的碳化酚醛（CPF）树脂装饰石墨烯纤维，可以实现分层结构，其中CPF和SG的结合可协同提供超高的微孔度和狭窄的微孔。 -/ meso-PSDs和增强的电导率，有利于离子的存储和运输。组装的FSSC在两电极电池中在0.1 mA cm -2的聚乙烯醇/ H 2 SO 4电解质中显示出391.2 mF cm -2的超高比表面积电容，是石墨烯纤维的17倍。整个设备的能量密度E cell，A为8.7μWh cm -2在非水电解质和66.4μW高厘米-2在0.54毫瓦厘米的面功率密度-2在有机电解质。此外，FSSC还具有超长的循环寿命（7000次循环后电容保持率为98.9％）和良好的柔韧性。所有这些结果使它成为迄今为止报道的最好的全碳FSSC之一。这项工作可能有助于大规模生产低成本但高性能的可穿戴纤维状能量存储设备。
更新日期：2017-11-20
中文翻译：
具有高能量密度的多层多孔皮芯石墨烯基纤维状超级电容器
由于具有高功率密度，快速的充电/放电速率，超长的循环寿命和安全的工作条件，全碳纤维形状的超级电容器（FSSC）有望为可穿戴电子设备供电。然而，由于缺乏有效的方法用于具有高比电容的高导电性纤维电极，它们的低能量密度阻碍了它们的实际应用。本文中，我们针对具有合理PSD（88-97％的微孔，0-8.3％的中孔和1.9-4.2％的大孔）和高SSA（向上）的分层多孔核-鞘层石墨烯基纤维电极开发了一种可扩展且具有成本效益的策略。至416.4 m 2 g -1）。通过简单地用包含小尺寸（直径约156 nm）石墨烯（SG）的碳化酚醛（CPF）树脂装饰石墨烯纤维，可以实现分层结构，其中CPF和SG的结合可协同提供超高的微孔度和狭窄的微孔。 -/ meso-PSDs和增强的电导率，有利于离子的存储和运输。组装的FSSC在两电极电池中在0.1 mA cm -2的聚乙烯醇/ H 2 SO 4电解质中显示出391.2 mF cm -2的超高比表面积电容，是石墨烯纤维的17倍。整个设备的能量密度E cell，A为8.7μWh cm -2在非水电解质和66.4μW高厘米-2在0.54毫瓦厘米的面功率密度-2在有机电解质。此外，FSSC还具有超长的循环寿命（7000次循环后电容保持率为98.9％）和良好的柔韧性。所有这些结果使它成为迄今为止报道的最好的全碳FSSC之一。这项工作可能有助于大规模生产低成本但高性能的可穿戴纤维状能量存储设备。
京公网安备 11010802027423号