石墨烯
超级电容器
剥脱关节
氟
电容
微尺度化学
石墨
纳米技术
杂原子
材料科学
化学工程
电解质
电化学
化学
储能
电极
复合材料
有机化学
功率(物理)
物理化学
数学教育
工程类
物理
量子力学
数学
戒指(化学)
作者
Feng Zhou,Haibo Huang,Chuanhai Xiao,Shuanghao Zheng,Xiaoyu Shi,Jieqiong Qin,Qiang Fu,Xinhe Bao,Xinliang Feng,Kläus Müllen,Zhong‐Shuai Wu
摘要
Scalable production of high-quality heteroatom-modified graphene is critical for microscale supercapacitors but remains a great challenge. Herein, we demonstrate a scalable, single-step electrochemical exfoliation of graphite into highly solution-processable fluorine-modified graphene (FG), achieved in an aqueous fluorine-containing neutral electrolyte, for flexible and high-energy-density ionogel-based microsupercapacitors (FG-MSCs). The electrochemically exfoliated FG nanosheets are characterized by atomic thinness, large lateral size (up to 12 μm), a high yield of >70% with ≤3 layers, and a fluorine doping of 3 at%, allowing for large-scale production of FG-MSCs. Our ionogel-based FG-MSCs deliver high energy density of 56 mWh cm-3, by far outperforming the most reported MSCs. Furthermore, the all-solid-state microdevices offer exceptional cyclability with ∼93% after 5000 cycles, robust mechanical flexibility with 100% of capacitance retention bended at 180°, and outstanding serial and parallel integration without the requirement of metal-based interconnects for high-voltage and high-capacitance output. Therefore, these FG-MSCs represent remarkable potential for electronics.
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