Journal Article

PUBDB-2024-06064

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Structural and chemical analysis of hard carbon negative electrode for Na-ion battery with X-ray Raman scattering and solid-state NMR spectroscopy

Rajh, A. (Corresponding author)Extern* ; Gabrijelcic, M.Extern* ; Tratnik, B. ; Bučar, K.Extern* ; Arcon, I.Extern* ; Petric, M. ; Dominko, R.Extern* ; Vizintin, A. (Corresponding author)Extern* ; Kavcic, M. (Corresponding author)Extern*

2024
Elsevier Science Amsterdam [u.a.]

This record in other databases:      

Please use a persistent id in citations: doi:10.1016/j.carbon.2024.119398  doi:10.3204/PUBDB-2024-06064

Abstract: This study explores the structural changes of hard carbon (HC) negative electrodes in sodium-ion batteries induced by insertion of Na ions during sodiation. X-ray Raman spectroscopy (XRS) was used to record both C and Na K-edge absorption spectra from bulk HC anodes carbonized at different temperatures and at several points during sodiation and desodiation. Comparing the / regions in the C K-edge spectra / hybridization ratio of material was determined. Higher carbonization temperatures led to increased order in graphitic structure and shorter bond lengths. Sodiation caused a decrease in graphitic layer order due to inserted Na ions. Complementary operando solid state nuclear magnetic resonance (ssNMR) studies confirmed the structural changes, while showing pore filling mechanism, which is not observed in ex situ measurements, primarily at higher carbonization temperatures. XRS analysis of Na K-edge spectra revealed systematic variations in the solid electrolyte interface (SEI) composition during cycling. Changes in XRS spectra were attributed to both SEI composition alterations, accompanied by the insertion/adsorption of Na ions at defect sites within the carbon structure.

---

Contributing Institute(s):

1. DOOR-User (DOOR ; HAS-User)

Research Program(s):

1. 6G3 - PETRA III (DESY) (POF4-6G3) (POF4-6G3)
2. FS-Proposal: I-20221051 EC (I-20221051-EC) (I-20221051-EC)

Experiment(s):

1. PETRA Beamline P01 (PETRA III)
2. DESY NanoLab: Electrochemistry Lab

Appears in the scientific report 2024

---

Database coverage:
; ; ; Clarivate Analytics Master Journal List ; Current Contents - Physical, Chemical and Earth Sciences ; Ebsco Academic Search ; Essential Science Indicators ; IF >= 10 ; JCR ; SCOPUS ; Science Citation Index Expanded ; Web of Science Core Collection

---