材料科学
超级电容器
纤维
电容
复合材料
储能
纺纱
电化学
极限抗拉强度
热稳定性
重量分析
化学工程
电极
物理化学
工程类
功率(物理)
有机化学
化学
物理
量子力学
作者
Wenjie Yu,Yu Liu,Binjie Xin,Zan Lü
标识
DOI:10.1007/s12221-022-4389-4
摘要
MXene fiber-based supercapacitor exhibits a great potential for wearable energy storage devices with a large surface area, good conductive, and higher power density. However, MXene flakes are difficult to spin independently due to the non-liquid crystal structure. In the report, we fabricated freestanding MXene/PVA fibers with good stretchability and impressive electrochemical properties for fiber-based supercapacitors by a simple wet spinning method. The tensile strength of the MXene/PVA fibers is significantly enhanced compared with pure PVA fibers for the concentration of MXene for around 5–20 wt.%. The elongation of the MXene/PVA fiber can reach 48 %, even if the MXene concentration increase to 25 wt.%. MXene flakes also increase the thermal stability of hybrid fibers compared with pure PVA fibers. MXene/PVA fiber-based supercapacitors act as efficient energy storage devices, which display high gravimetric capacitance (119.3 F g−1), and areal capacitance (130.9 mF cm−2), strong durability in multiple mechanical states, and steady electrochemical behavior after stretching.
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