假电容
超级电容器
材料科学
电化学
层状双氢氧化物
氢氧化物
电容
电流密度
化学工程
水平扫描速率
功率密度
扩散
电极
活性炭
循环伏安法
有机化学
化学
吸附
功率(物理)
物理化学
工程类
物理
热力学
量子力学
作者
X. L. Wang,Lixin Li,Wenlong Wang,Peng Sun,Yecheng Zhou,Xiang Li,Chao Meng,Xiaoliang Wang
标识
DOI:10.1016/j.matlet.2023.135522
摘要
Layered double hydroxides (LDHs) are favorable pseudocapacitance electrodes due to their adjustable composition and low cost. Here, a series of NiCo-LDHs were prepared by a novel ammonia diffusion method at room temperature. Compared with other synthesis methods, this method is a simple, green, original and effective method. The morphology, structure, and elemental composition of NiCo-LDH electrode materials were characterized and their electrochemical properties were tested. The optimal honeycomb NiCo-LDH shows a specific capacitance (Cs) of 1463.2F·g−1 at 1 A·g−1, and the rate capacity is 75.2 % at 20 A·g−1. Particularly, the Cs is still 87.9 % after 2000 charge–discharge cycles at a high current density of 20 A·g−1. In addition, the hybrid supercapacitor with NiCo-LDH//activated carbon (AC) could show an energy density of 23.4 Wh·kg−1 at a power density of 900 W·kg−1, along with 73.4 % capacity retention after 5000 cycles.
科研通智能强力驱动
Strongly Powered by AbleSci AI