Graphene-based materials have attracted considerable attention as the electrochemical energy storage and conversion material due to their high electronic conductivity and large ion-accessible surface area. Herein, a series of self-assembled reduced graphene oxide (rGO) films are facilely prepared via a scalable vacuum filtration method, whose thickness is regulated by changing the concentration of the filtering rGO solution. The effect of the mass loading (thickness) of rGO film electrodes on its electrochemical performance is investigated. These rGO film electrodes with mass loading of 6.7 mg cm⁻² exhibit a high specific capacitance of 173.4 F g ^− 1 (1.16 F cm⁻²) at 1 A g ^− 1 and show high utilization of the active material due to their large specific surface area and uniform pore distribution. Moreover, a quasi-solid supercapacitor fabricated with the as-prepared rGO film electrode shows a high area capacitance of 1.03 F cm⁻² and large specific energy of 0.073 mWh cm⁻² at the specific power of 3.3 mW cm⁻², as well as excellent cycling stability of 85.6% retention after 10,000 cycles. Such remarkable performance suggests that this rGO film is promising electrode material for supercapacitor application.

石墨烯基材料由于其高电子传导性和较大的离子可及表面积而作为电化学能量存储和转换材料备受关注。在此，通过可分级真空过滤方法容易地制备一系列自组装的还原氧化石墨烯（rGO）膜，其厚度通过改变过滤rGO溶液的浓度来调节。研究了rGO薄膜电极的质量负载（厚度）对其电化学性能的影响。这些与6.7毫克厘米质量负载RGO膜电极^-2表现出173.4 F A高的比电容克 ^{-  1}（1.16˚F厘米^-2在1 A）克 ^{- 如图1所示}，由于其大的比表面积和均匀的孔分布，显示出活性材料的高利用率。此外，准固态超级电容器与所制备的RGO膜电极节目制作的1.03˚Fcm的高面积电容^-2和大的比能量的0.073 mWh的厘米^-2以3.3毫瓦厘米比功率^-2，以及10,000次循环后保留率达85.6％的出色循环稳定性。如此出色的性能表明，该rGO膜是用于超级电容器应用的有前途的电极材料。