Hussain Iftikhar, Shaheen Irum, Ahmad Rabia, Ali Ijaz, Hussain Khurshid, Hussain Sayed Sajid, Alsaiari Norah Salem, Katubi Khadijah Mohammedsaleh, Eldin Sayed M, Ansari Mohd Zahid
Department of Mechanical Engineering, City University of Hong Kong, 83 Tat Chee Avenue, Kowloon, Hong Kong.
Sabanci University Nanotechnology Research and Application Center, Orta Mah. Tuzla 34956 Istanbul, Turkey.
Chemosphere. 2023 Feb;314:137660. doi: 10.1016/j.chemosphere.2022.137660. Epub 2022 Dec 26.
Researchers have been enthusiastic about developing high-performance electrode materials based on metal chalcogenides for energy storage applications. Herein, we developed cupric ion-containing zinc sulfide (ZnS:Cu) nanoplates by using a solvothermal approach. The as-synthesized ZnS:Cu nanoplates electrode was characterized and analyzed by using XRD, SEM, TEM, EDS, and XPS. The binder-free flexible ZnS:Cu nanoplates exhibited excellent specific capacitance of 545 F g at a current density of 1 A g. The CV and GCD measurements revealed that the specific capacitance was mainly attributed to the Faradaic redox mechanism. Further, the binder-free flexible ZnS:Cu nanoplates electrode retained 87.4% along with excellent Coulombic efficiency (99%) after 5000 cycles. The binder-free flexible ZnS:Cu nanoplates exhibited excellent conductivity, specific capacitance, and stability which are beneficial in energy storage systems. These findings will also open new horizons amongst material scientists toward the new direction of electrode development.
研究人员一直热衷于开发基于金属硫族化物的高性能电极材料用于储能应用。在此，我们采用溶剂热法制备了含铜离子的硫化锌（ZnS:Cu）纳米片。通过X射线衍射（XRD）、扫描电子显微镜（SEM）、透射电子显微镜（TEM）、能谱仪（EDS）和X射线光电子能谱（XPS）对合成的ZnS:Cu纳米片电极进行了表征和分析。无粘结剂的柔性ZnS:Cu纳米片在1 A g的电流密度下表现出545 F g的优异比电容。循环伏安（CV）和恒流充放电（GCD）测量表明，比电容主要归因于法拉第氧化还原机制。此外，无粘结剂的柔性ZnS:Cu纳米片电极在5000次循环后保留了87.4%的电容，同时具有优异的库仑效率（99%）。无粘结剂的柔性ZnS:Cu纳米片表现出优异的导电性、比电容和稳定性，这对储能系统是有益的。这些发现也将为材料科学家在电极开发的新方向上打开新的视野。
