二硫化钨
材料科学
异质结
二硫化钼
超级电容器
阳极
阴极
插层(化学)
相(物质)
石墨烯
光电子学
纳米技术
普鲁士蓝
电化学
兴奋剂
相变
无机化学
化学
凝聚态物理
电极
复合材料
物理化学
物理
有机化学
作者
Pragati A. Shinde,Nilesh R. Chodankar,Hyung‐Jin Kim,Mohammad Ali Abdelkareem,Amal Al Ghaferi,Young‐Kyu Han,A.G. Olabi,Katsuhiko Ariga
出处
期刊:ACS energy letters
[American Chemical Society]
日期:2023-10-02
卷期号:8 (10): 4474-4487
被引量:30
标识
DOI:10.1021/acsenergylett.3c01452
摘要
Tungsten disulfide (WS2) has recently emerged as a nontrivial material for electrochemical applications; however, boundaries associated with its 1T and 2H phases limit its performance. Here, this issue is addressed by evolving a dual-phase 1T-2H WS2 heterostructure that combines two different phases directly on the current collector. The resulting material demonstrated a 2D transformable phase structure, large interlayer distance, and highly exposed edge-active sites. Theoretical calculations confirmed that the 1T WS2 formed after phosphorus doping exhibits a semimetallic feature, elucidating a high electronic conductivity. The edge-enriched metallic phase and interlayer engineering of the 1T-2H WS2 heterostructure validate exceptional Na+ ion intercalation. The hybrid supercapacitor cell assembled with the 1T-2H WS2 anode and Prussian blue analogue (PBA) cathode shows a specific energy of 65.5 Wh kg–1 at 784 W kg–1, and 95.7% cycling stability. This work paves a technique for phase transition and sheds light on the expansion of efficient energy storage devices.
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