超级电容器
材料科学
非阻塞I/O
电容
循环伏安法
纳米复合材料
石墨烯
化学工程
氧化物
氧化镍
纳米颗粒
电化学
电极
纳米技术
冶金
化学
催化作用
物理化学
工程类
生物化学
作者
Muhammad Nasir Hussain,Abid Inayat,Rotaba Ansir,Abdul Khaliq Naveed,Syed Mustansar Abbas,Ali Haider,Syed Mujtaba Shah
标识
DOI:10.1002/ente.202300854
摘要
Herein, a direct hydrothermal protocol for the synthesis of nickel‐based hydroxide/oxide nanocomposites grown on reduced graphene oxide (rGO) is presented. The materials are employed as a high‐performance active layer for advanced supercapacitors. Ni(OH) 2 /rGO and NiO/rGO nanocomposites demonstrate a high specific capacitance of 1255.12 and 636.84 F g −1 at 10 mV s −1 obtained from cyclic voltammetry curves while 1092.5 and 1070 F g −1 are estimated from galvanostatic charge–discharge at 1 A g −1 , respectively. Subsequently, symmetric devices with a broad potential window of 1.4 V for both the materials are also fabricated. Symmetric devices deliver maximum specific capacitance of 115.71 and 80.28 F g −1 at 1 A g −1 with an energy density of 31. 5 and 22 Wh kg −1 at power density of 1.4 kW kg −1 , which indicates the high‐rate capability of the devices. The devices have maximum capacity retention of 81% and 93%, when tested for 1000 discharge cycles at 3 A g −1 , showing high cycle stability. The superlative performance of nanocomposites can be attributed to the synergistic effects they exhibit, demonstrating that they are appealing electrode materials for supercapacitor applications.
科研通智能强力驱动
Strongly Powered by AbleSci AI