假电容器
MXenes公司
材料科学
超级电容器
多孔性
电容
纳米技术
多孔介质
复合材料
分析化学(期刊)
化学
物理化学
电极
色谱法
作者
Jing Kong,Huachao Yang,Xinzheng Guo,Shiling Yang,Zhesong Huang,Xinchao Lu,Zheng Bo,Jianhua Yan,Kefa Cen,Kostya Ostrikov
出处
期刊:ACS energy letters
[American Chemical Society]
日期:2020-06-15
卷期号:5 (7): 2266-2274
被引量:94
标识
DOI:10.1021/acsenergylett.0c00704
摘要
Mass production of ordered and porous three-dimensional (3D) electrodes is a crucial prerequisite for practical energy storage devices. MXenes have drawn considerable attention as pseudocapacitive materials for outstanding electric conductivity and surface redox reactions; however, they face challenges for achieving 3D porous architectures especially at high mass loadings. Herein we propose a reduced-repulsion freeze-casting assembly concept via interlayer interaction engineering for constructing 3D porous Ti3C2Tx films, wherein interlayer repulsion is minimized via less electronegative functional groups and charge screening effect based on quantum calculations. 3D Ti3C2Tx films deliver a capacitance of 207.9 F g–1 at 10 V s–1, which demonstrates 58.6% capacitance retention with a 1000-fold scan rate increase. The capacitive performance is almost independent of electrode mass loading up to 16.18 mg cm–2, exhibiting ultrahigh areal capacitance of 3731 mF cm–2 and energy density of 336.7 μWh cm–2.
科研通智能强力驱动
Strongly Powered by AbleSci AI