假电容器
材料科学
超级电容器
储能
面积密度
能量密度
电极
质子
3d打印
能量(信号处理)
电化学
纳米技术
低能
工程物理
复合材料
原子物理学
核物理学
热力学
化学
数学
医学
功率(物理)
物理化学
生物医学工程
工程类
物理
统计
作者
Miaoran Zhang,Tiezhu Xu,Di Wang,Tengyu Yao,Zhenming Xu,Qingsheng Liu,Laifa Shen,Yan Yu
标识
DOI:10.1002/adma.202209963
摘要
The sluggish ionic transport in thick electrodes and freezing electrolytes has limited electrochemical energy storage devices in lots of harsh environments for practical applications. Here, a 3D-printed proton pseudocapacitor based on high-mass-loading 3D-printed WO3 anodes, Prussian blue analog cathodes, and anti-freezing electrolytes is developed, which can achieve state-of-the-art electrochemical performance at low temperatures. Benefiting from the cross-scale 3D electrode structure using a 3D printing direct ink writing technique, the 3D-printed cathode realizes an ultrahigh areal capacitance of 7.39 F cm-2 at a high areal mass loading of 23.51 mg cm-2 . Moreover, the 3D-printed pseudocapacitor delivers an areal capacitance of 3.44 F cm-2 and excellent areal energy density (1.08 mWh cm-2 ). Owing to the fast ion kinetics in 3D electrodes and the high ionic conductivity of the hybrid electrolyte, the 3D-printed supercapacitor delivers 61.3% of the room-temperature capacitance even at -60 °C. This work provides an effective strategy for the practical applications of energy storage devices with complex physical structure at extreme temperatures.
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