Large Intercalation Pseudocapacitance in 2D VO2 (B): Breaking through the Kinetic Barrier
Alshareef, Husam N.
KAUST DepartmentComputer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division
Functional Nanomaterials and Devices Research Group
Imaging and Characterization Core Lab
Material Science and Engineering Program
Physical Science and Engineering (PSE) Division
Online Publication Date2018-08-30
Print Publication Date2018-10
Embargo End Date2019-08-30
Permanent link to this recordhttp://hdl.handle.net/10754/630515
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AbstractVO2 (B) features two lithiation/delithiation processes, one of which is kinetically facile and has been commonly observed at 2.5 V versus Li/Li+ in various VO2 (B) structures. In contrast, the other process, which occurs at 2.1 V versus Li/Li+ , has only been observed at elevated temperatures due to large interaction energy barrier and extremely sluggish kinetics. Here, it is demonstrated that a rational design of atomically thin, 2D nanostructures of VO2 (B) greatly lowers the interaction energy and Li+ -diffusion barrier. Consequently, the kinetically sluggish step is successfully enabled to proceed at room temperature for the first time ever. The atomically thin 2D VO2 (B) exhibits fast charge storage kinetics and enables fully reversible uptake and removal of Li ions from VO2 (B) lattice without a phase change, resulting in exceptionally high performance. This work presents an effective strategy to speed up intrinsically sluggish processes in non-van der Waals layered materials.
CitationXia C, Lin Z, Zhou Y, Zhao C, Liang H, et al. (2018) Large Intercalation Pseudocapacitance in 2D VO2 (B): Breaking through the Kinetic Barrier. Advanced Materials 30: 1803594. Available: http://dx.doi.org/10.1002/adma.201803594.
SponsorsC.X., Z.L., and Y.Z. contributed equally to this work. Research reported in this publication was supported by King Abdullah University of Science and Technology (KAUST). C.X. acknowledges support from Fan Zhang and Jing Guo at KAUST. The authors like to also thank Professor Bruce Dunn, UCLA, and Professor Patrice Simon, Université Paul Sabatier, for useful discussions.