Yang Chih-Chieh, Lin Hao-Yang, Kumar Amit, Pattanayak Bhaskar, Tsai Hung-Yi, Winie Tan, Tseng Tseung-Yuen
Department of Electronic Engineering, National Chiao Tung University Hsinchu 300 Taiwan
Faculty of Applied Sciences, Universiti Teknologi MARA 40450 Shah Alam Selangor Malaysia.
RSC Adv. 2018 Aug 28;8(53):30239-30247. doi: 10.1039/c8ra04674c. eCollection 2018 Aug 24.
All-solid-state supercapacitors (ASSS) with solid-state electrolytes (SSEs) can be used to overcome the liquid leakage problem in devices. However, ionic conduction in solid electrolytes is one of the barriers to further improvements in ASSS. This paper describes the fabrication of a flexible SSE composed of poly(vinylidene fluoride--hexafluoropropylene), 1-butyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide, and ethylene carbonate, which demonstrates an ultrahigh conductivity of 8.52 mS cm and a wide 5 V operation voltage window of -2 to +3 V. Electrodes composed of active carbon, multiwall carbon nanotubes, and polyvinylidene fluoride were used as both anode and cathode to assemble a symmetrical supercapacitor. The resultant supercapacitor exhibits a maximum power density of 3747 W kg at an energy density of 7.71 W h kg and a maximum energy density 17.1 W h kg at a power density of 630 W kg. It displays excellent cycling stability with 91.3% of the initial specific capacitance after 3000 charging/discharging cycles. This flexible SSE in this study demonstrates a high potential for use in energy storage, conversion, and wearable device applications.
具有固态电解质（SSEs）的全固态超级电容器（ASSS）可用于克服器件中的漏液问题。然而，固体电解质中的离子传导是全固态超级电容器进一步改进的障碍之一。本文描述了一种由聚（偏二氟乙烯-六氟丙烯）、1-丁基-3-甲基咪唑双（三氟甲基磺酰）亚胺和碳酸亚乙酯组成的柔性固态电解质的制备，该电解质具有8.52 mS cm的超高电导率和-2至+3 V的宽5 V工作电压窗口。由活性炭、多壁碳纳米管和聚偏二氟乙烯组成的电极用作阳极和阴极来组装对称超级电容器。所得超级电容器在能量密度为7.71 W h kg时表现出3747 W kg的最大功率密度，在功率密度为630 W kg时表现出17.1 W h kg的最大能量密度。在3000次充放电循环后，它显示出优异的循环稳定性，初始比电容保留91.3%。本研究中的这种柔性固态电解质在能量存储、转换和可穿戴设备应用中显示出很高的应用潜力。
