超级电容器
材料科学
氢氧化物
异质结
碳化钛
电容
化学工程
钛
功率密度
纳米技术
电极
冶金
化学
光电子学
物理化学
功率(物理)
工程类
物理
量子力学
作者
Ruizheng Zhao,Mengqiao Wang,Danyang Zhao,Hui Li,Chengxiang Wang,Longwei Yin
出处
期刊:ACS energy letters
[American Chemical Society]
日期:2017-12-11
卷期号:3 (1): 132-140
被引量:266
标识
DOI:10.1021/acsenergylett.7b01063
摘要
Unique layered Ti3C2/Ni–Co–Al layered double hydroxide (LDH) heterostructures alternatively stacked with molecular-level nanosheets are for the first time synthesized by a facile liquid-phase cofeeding and electrostatic attraction heteroassemble strategy between negatively charged Ti3C2 and positively charged Ni–Co–Al-LDH nanosheets. The molecular-level Ti3C2/Ni–Co–Al-LDH heterostructures possessing the merits of both conductive and pseudocapacitive components can show greatly enhanced dynamic behavior in Faradaic reaction, which is significant for obtaining a high power density. Electrons penetrate in Ti3C2 layers, while ions diffuse rapidly along two-dimensional galleries, displaying the shortest diffusion pathway and highest efficiency for charge transfer. The Ti3C2/Ni–Co–Al-LDH heterostructure exhibits a specific capacitance of 748.2 F g–1 at current density of 1 A g–1, showing an enhanced rate capacity. Importantly, a maximum energy density of 45.8 Wh kg–1 is obtained when Ti3C2/Ni–Co–Al-LDH acts as the positive electrode for an all-solid-state flexible asymmetric supercapacitor. The results indicate that molecular-level heterotructure is a promising candidate for future high-energy supercapacitors.
科研通智能强力驱动
Strongly Powered by AbleSci AI