Kiatikajornjumroen Setthathon, Liu Xiaopeng, Lu Yinan, Deka Boruah Buddha
Institute for Materials Discovery (IMD), University College London (UCL), London WC1E 7JE, UK.
Micromachines (Basel). 2023 Jul 23;14(7):1476. doi: 10.3390/mi14071476.
Given the rapid progress and widespread adoption of advanced energy storage devices, there has been a growing interest in aqueous capacitors that offer non-flammable properties and high safety standards. Consequently, extensive research efforts have been dedicated to investigating zinc anodes and low-cost carbonaceous cathode materials. Despite these efforts, the development of high-performance zinc-ion capacitors (ZICs) still faces challenges, such as limited cycling stability and low energy densities. In this study, we present a novel approach to address these challenges. We introduce a three-dimensional (3D) conductive porous carbon framework cathode combined with zinc anode cells, which exhibit exceptional stability and durability in ZICs. Our experimental results reveal remarkable cycling performance, with a capacity retention of approximately 97.3% and a coulombic efficiency of nearly 100% even after 10,000 charge-discharge cycles. These findings represent significant progress in improving the performance of ZICs.
鉴于先进储能设备的迅速发展和广泛应用，人们对具有不可燃特性和高安全标准的水系电容器的兴趣与日俱增。因此，大量的研究工作致力于研究锌负极和低成本的碳质正极材料。尽管做出了这些努力，高性能锌离子电容器（ZIC）的发展仍然面临挑战，例如循环稳定性有限和能量密度较低。在本研究中，我们提出了一种新颖的方法来应对这些挑战。我们引入了一种三维（3D）导电多孔碳框架正极与锌负极电池相结合的体系，该体系在锌离子电容器中表现出卓越的稳定性和耐久性。我们的实验结果显示出显著的循环性能，即使在10000次充放电循环后，容量保持率仍约为97.3%，库仑效率接近100%。这些发现代表了在提高锌离子电容器性能方面取得的重大进展。
