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首页> 外文期刊>ACS applied materials & interfaces >High-Performance Three-Dimensional Mesoporous Graphene Electrode for Supercapacitors using Lyophilization and Plasma Reduction
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High-Performance Three-Dimensional Mesoporous Graphene Electrode for Supercapacitors using Lyophilization and Plasma Reduction

机译：用于超级电容器的高性能三维中孔石墨烯电极，使用冻干和等离子体还原

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摘要

In this study, a three-dimensional (3D) mesoporous plasma-reduced graphene oxide web (mPrGO web) was fabricated via lyophilization of graphene oxide (GO) solution and subsequent plasma reduction. The lyophilized graphene oxide web (GO web) was successfully reduced by a short plasma treatment (<2 s) using a commercially available plasma apparatus. The degree of reduction of the mPrGO web was determined by the applied plasma power (W) of the apparatus; the optimum power level for effective reduction was identified. The as-synthesized mPrGO web showed a high degree of reduction and robust graphitic characteristics, with a unique crack-like mesoporous structure created on corrugated graphene sheets. In addition to the above characteristics, the mPrGO web possessed a 3D web-like architecture that provided enhanced surface area along with ion-transportable channels derived from lyophilization. Owing to the synergistic effect of lyophilization and plasma reduction, the mPrGO web exhibited high electrical conductivity (87 S cm(-1)) and increased surface area (642 m(2) g(-1)). Accordingly, the mPrGO web showed outstanding specific capacitance of 253.8 F g(-1) at 0.2 A g(-1) along with the excellent rate capability (76% capacitance retention at 5 A g(-1)). Furthermore, the assembled all-solid-state symmetric supercapacitor also exhibited remarkable electrochemical performances, demonstrating the potential applicability of the mPrGO web as an effective supercapacitor electrode material.
机译：在该研究中，通过冻干石墨烯（GO）溶液和随后的等离子体还原，制造三维（3D）介孔等离子体还原的石墨烯氧化物纤维网（MPRGO网）。使用市售的等离子体装置通过短等离子体处理（<2 s）成功减少了冻干的石墨烯氧化物纤维网（GO WEB）。 MPRGO网的减少程度由装置的施加的等离子体功率（W）确定;确定有效减少的最佳功率水平。 AS合成的MPRGO网显示出高度的减少和鲁棒的石墨特性，具有在波纹石墨烯片上产生的独特裂纹的介孔结构。除了上述特性之外，MPRGO网具有3D网状架构，其提供增强的表面积以及离子可传输通道源于冻干。由于冻干和血浆减少的协同效应，MPRGO网呈现出高导电率（87℃（-1））和增加的表面积（642μm（2 )g（-1））。因此，MPRGO网在0.2Ag（-1）中显示出253.8fg（-1）的出色特定电容以及优异的速率能力（5ag（-1）的76％电容保留）。此外，组装的全固态对称超级电容器还表现出显着的电化学性能，证明了MPRO网作为有效超级电容器电极材料的潜在适用性。

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