Na-Ion Intercalation and Charge Storage Mechanism in Two-Dimensional Vanadium Carbide
- Brookhaven National Lab. (BNL), Upton, NY (United States). Chemistry Division
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Advanced Light Source
- Chinese Academy of Sciences (CAS), Beijing (China). Inst. of Physics
- Drexel Univ., Philadelphia, PA (United States). Dept.of Materials Science and Engineering, A.J Drexel Nanomaterials Inst.
- Argonne National Lab. (ANL), Argonne, IL (United States). X-ray Science Division
Two-dimensional vanadium carbide MXene containing surface functional groups (denoted as V2CTx, where Tx are surface functional groups) was synthesized and studied as anode material for Na-ion batteries. V2CTx anode exhibits reversible charge storage with good cycling stability and high rate capability through electrochemical test. The charge storage mechanism of V2CTx material during Na+ intercalation/deintercalation and the redox reaction of vanadium were studied using a combination of synchrotron based X-ray diffraction (XRD), hard X-ray absorption near edge spectroscopy (XANES) and soft X-ray absorption spectroscopy (sXAS). Experimental evidence of a major contribution of redox reaction of vanadium to the charge storage and the reversible capacity of V2CTx during sodiation/desodiation process have been provided through V K-edge XANES and V L2,3-edge sXAS results. A correlation between the CO32- content and Na+ intercalation/deintercalation states in the V2CTx electrode observed from C and O K-edge in sXAS results imply that some additional charge storage reactions may take place between the Na+-intercalated V2CTx and the carbonate based non-aqueous electrolyte. The results of this study will provide valuable information for the further studies on V2CTx as anode material for Na-ion batteries and capacitors.
- Research Organization:
- Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States). Advanced Light Source (ALS); Brookhaven National Laboratory (BNL), Upton, NY (United States); Argonne National Laboratory (ANL), Argonne, IL (United States); SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States); Energy Frontier Research Centers (EFRC) (United States). Fluid Interface Reactions, Structures and Transport Center (FIRST)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES); USDOE Office of Energy Efficiency and Renewable Energy (EERE), Vehicle Technologies Office (EE-3V); Chinese Academy of Sciences
- Grant/Contract Number:
- SC00112704; AC02-05CH11231; AC02-06CH11357; AC02-76SF00515; SC0012704; AC02‐76SF00515; AC02‐06CH11357
- OSTI ID:
- 1366345
- Alternate ID(s):
- OSTI ID: 1401559; OSTI ID: 1415478; OSTI ID: 1425427
- Report Number(s):
- BNL-113977-2017-JA; R&D Project: MA453MAEA; VT1201000
- Journal Information:
- Advanced Energy Materials, Vol. 7, Issue 20; ISSN 1614-6832
- Publisher:
- WileyCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
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