2026-10-11T17:26:43Zhttps://www.radar-service.eu/oai/OAIHandler10.35097/14432026-10-09T10:53:29Zradar4kit
https://dx.doi.org/10.35097/1443
Fu, Qiang
Guo, Bingrui
Hua, Weibo
Sarapulova, Angelina
Zhu, Lihua
Weidler, Peter G.
Missyul, Alexander
Knapp, Michael
Ehrenberg, Helmut
Dsoke, Sonia
Electrochemical Investigation of Calcium Substituted Monoclinic Li3V2(PO4)3 Negative Electrode Materials for Sodium- and Potassium-Ion Batteries
Karlsruhe Institute of Technology
2023
Engineering
dataset
Dataset
info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/4.0/legalcode
Herein, the electrochemical properties and reaction mechanism of Li3-2xCaxV2(PO4)3/C (x = 0, 0.5, 1, and 1.5) as negative electrode materials for sodium-ion/potassium-ion batteries (SIBs/PIBs) are investigated. All samples undergo a mixed contribution of diffusion-controlled and pseudocapacitive-type processes in SIBs and PIBs via Trasatti Differentiation Method, while the latter increases with Ca content increase. Among them, Li3V2(PO4)3/C exhibits the highest reversible capacity in SIBs and PIBs, while Ca1.5V2(PO4)3/C shows the best rate performance with a capacity retention of 46% at 20 C in SIBs and 47% at 10 C in PIBs. This study demonstrates that the specific capacity of this type of material in SIBs and PIBs does not increase with the Ca-content as previously observed in lithium-ion system, but the stability and performance at a high C-rate can be improved by replacing Li+ with Ca2+. This indicates that insertion of different monovalent cations (Na+/K+) can strongly influence the redox reaction and structure evolution of the host materials, due to the larger ion size of Na+ and K+ and their different kinetic properties with respect to Li+. Furthermore, the working mechanism of both LVP/C and Ca1.5V2(PO4)3/C in SIBs are elucidated via in operando synchrotron diffraction and in operando X-ray absorption spectroscopy.
Datasets and proceeded data
Monoclinic Li3V2(PO4)3
Negative electrode materials
Electrochemical performance
Sodium-ion batteries
Potassium-ion batteries
application/x-tar