Yongfeng Li , Xiangru Zhu , Xiaowen Zhang , Jinhua Zhang , Yanzhen Liu
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引用次数: 0
Abstract
The increasing demand for high-energy–density, customizable Micro-Supercapacitors (MSCs) is driven by the rapid miniaturization, integration, and smart functionalities of electronic devices. The use of 3D printing technology in fabricating high-performance energy storage electrodes opens up novel opportunities for portable and micro-device applications. Through a simple solution reduction method, NaBH4 is used to adjust the electronic structure of Co3O4, producing defects rich in oxygen vacancies (Ovs), increasing electroactive sites, reducing resistance, and thus improving the performance of supercapacitors. By mixing with graphene oxide in a certain proportion to prepare 3D printing ink, a three-dimensional conductive network is formed. In this work, the Micro-Supercapacitor (MSC) fabricated via 3D printing technology demonstrates excellent electrochemical performance. It achieves a high areal specific capacity of 715.6 mF cm−2 at a current density of 1 mA cm−2. After 10,000 cycles at a high current density of 9 mA cm−2, it retains 92.5 % of its initial capacity. Additionally, it delivers an impressive energy density of 254.4 µWh cm−2 at a power density of 800 µW cm−2. Mesenchymal stem cells fabricated via 3D printing offer a transformative approach for developing next-generation wearable electronics.
期刊介绍:
Applied Surface Science covers topics contributing to a better understanding of surfaces, interfaces, nanostructures and their applications. The journal is concerned with scientific research on the atomic and molecular level of material properties determined with specific surface analytical techniques and/or computational methods, as well as the processing of such structures.