超级电容器
材料科学
电容
多孔性
微电子
纳米技术
电容器
桥接(联网)
X射线光电子能谱
光电子学
化学工程
电极
复合材料
电压
化学
电气工程
计算机科学
计算机网络
工程类
物理化学
作者
Pengcheng Sun,Jingyuan Liu,Qi Liu,Jing Yu,Rongrong Chen,Jiahui Zhu,Gaohui Sun,Ying Li,Dalei Song,Jun Wang
标识
DOI:10.1016/j.cej.2024.152731
摘要
The vision of "Internet of Everything" marked by wearable and multi-functional microelectronics technology has a profound impact on our lives, and the requirements for micro-supercapacitors (MSCs) are also constantly increasing. Compared to traditional capacitors, there is still a lack of systematic investigation on regulating the morphology and internal structure of microelectrodes. Herein, we achieved the inkjet printing of intricate structures, a novel 3D N-MXene/NiCo2S4 porous network, and applied it to long-life hybrid MSCs. A new bridging mechanism of Ni atoms and O atoms is demonstrated by XPS. DFT calculations reveal that the O atoms of N-MXene can capture electrons from Ni atoms of NiCo2S4, resulting in charge redistribution in the interfacial region of 3D N-MXene/NiCo2S4, thereby realizing enhanced structural stability of the composite material. Due to the gradual release of active sites within the porous network, its capacitance retention rate can be as high as 99.1 % after 25,000 charge and discharge tests. With a wide voltage window of 1.6 V, a volumetric capacitance of 983.9 F cm−3, and an energy density of 342.4 mWh cm−3, the MSCs perform better than previously reported inkjet-printed MSCs. Our work demonstrates a new strategy to regulate the surface morphology and internal structure of the microelectrodes by high-precision inkjet printing to improve the performance of the MSCs.
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