假电容器
超级电容器
材料科学
电容
电介质
兴奋剂
电极
储能
复合数
氢氧化物
化学工程
纳米结构
纳米技术
电导率
介电损耗
光电子学
复合材料
化学
功率(物理)
物理化学
工程类
物理
量子力学
作者
Muhammad Arshad Kamran,Wasif Ali,Sami Ullah,T. Alharbi,Qeemat Gul
标识
DOI:10.1016/j.est.2023.106871
摘要
Supercapacitors are widely recognized to be a significant class of energy storage technologies serving a range of uses. However, it is still urgently necessary to develop the same employing resources that are abundant on earth and are eco-friendly while maintaining excellent performance. Herein, Ga-doped ZnO nanostructures of different Ga concentrations were prepared by a composite-hydroxide-mediated (CHM) approach. The XRD, Raman, FT-IR, and EDX results confirmed the doping of Ga into ZnO. The dielectric properties of pure ZnO and Ga-doped ZnO have been examined at room temperature, revealing that the dielectric constant and the ac conductivity increased by Ga doping, while the dielectric loss reduced. The obtained results showed that 0.8 % Ga-ZnO electrode possesses a maximum value of the specific capacitance (Cp) 440.9 F/g at 1 mV s−1 and 482.5 F/g at 1 A/g with noticeably specific energy (10.8 Wh/kg) and high specific power (200 W/kg). A high capacitance retention capability (80 %) was also maintained by 0.8 % Ga-ZnO electrode after 3000 cycles. The prepared electrode materials are a better choice for high-performance supercapacitors in order to meet the ongoing need for energy storage devices.
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