Research output: Contribution to journal › Article › peer-review
Effect of Charge Transfer upon Li- and Na-Ion Insertion in Fine-Grained Graphitic Material as Probed by NMR. / Vyalikh, Anastasia; Koroteev, Victor O.; Münchgesang, Wolfram et al.
In: ACS Applied Materials and Interfaces, Vol. 11, No. 9, 06.03.2019, p. 9291-9300.Research output: Contribution to journal › Article › peer-review
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TY - JOUR
T1 - Effect of Charge Transfer upon Li- and Na-Ion Insertion in Fine-Grained Graphitic Material as Probed by NMR
AU - Vyalikh, Anastasia
AU - Koroteev, Victor O.
AU - Münchgesang, Wolfram
AU - Köhler, Thomas
AU - Röder, Christian
AU - Brendler, Erica
AU - Okotrub, Alexander V.
AU - Bulusheva, Lyubov G.
AU - Meyer, Dirk C.
N1 - Publisher Copyright: © 2019 American Chemical Society.
PY - 2019/3/6
Y1 - 2019/3/6
N2 - We investigated the insertion-extraction behaviors of Li and Na ions in graphitic materials using solid-state NMR. A unique advantage of high-degree 13 C-isotope enrichment of graphitic material allowed sensitive and metastable graphite intercalation compounds to be measured in a short time. Ex situ 13 C magic-angle spinning NMR spectra of 13 C fine-grained graphite are presented as a function of state-of-charge. The observations are discussed with respect to graphite intercalation phenomena, which include the effects of charge transfer and the demagnetizing field. Dramatic narrowing of the 13 C NMR signal in metal-intercalated graphite evidences quasi-complete charge transfer occurring between lithium and graphite host material and resulting in reducing the macroscopic field effects. Upon Na insertion, incomplete charge transfer is observed and explained by inaccessibility of graphitic interlayer space for Na ions in our study. In addition, critical issues of reversibility of Li- and Na-ion electrochemical cells and solid electrolyte interphase formation are considered on the atomic scale. The knowledge gained in the present work can be applied to advanced high-power-density electrode materials for safe and fast-charging metal-ion batteries or for novel spintronic concepts with controlled spin-polarized charge carrier injection and transport combined with the possibility to manipulate magnetic anisotropy.
AB - We investigated the insertion-extraction behaviors of Li and Na ions in graphitic materials using solid-state NMR. A unique advantage of high-degree 13 C-isotope enrichment of graphitic material allowed sensitive and metastable graphite intercalation compounds to be measured in a short time. Ex situ 13 C magic-angle spinning NMR spectra of 13 C fine-grained graphite are presented as a function of state-of-charge. The observations are discussed with respect to graphite intercalation phenomena, which include the effects of charge transfer and the demagnetizing field. Dramatic narrowing of the 13 C NMR signal in metal-intercalated graphite evidences quasi-complete charge transfer occurring between lithium and graphite host material and resulting in reducing the macroscopic field effects. Upon Na insertion, incomplete charge transfer is observed and explained by inaccessibility of graphitic interlayer space for Na ions in our study. In addition, critical issues of reversibility of Li- and Na-ion electrochemical cells and solid electrolyte interphase formation are considered on the atomic scale. The knowledge gained in the present work can be applied to advanced high-power-density electrode materials for safe and fast-charging metal-ion batteries or for novel spintronic concepts with controlled spin-polarized charge carrier injection and transport combined with the possibility to manipulate magnetic anisotropy.
KW - C solid-state NMR
KW - C-enriched graphite
KW - EPR
KW - fine-grained graphitic material
KW - lithium intercalation
KW - Raman spectroscopy
KW - sodium intercalation
KW - RAMAN-SPECTRA
KW - ELECTRON-SPIN-RESONANCE
KW - C-13-enriched graphite
KW - NUCLEAR-MAGNETIC-RESONANCE
KW - GRAPHENE
KW - STATE
KW - CARBONS
KW - DIAMAGNETISM
KW - C-13 solid-state NMR
KW - C-13 NMR
KW - LITHIUM
KW - ELECTROCHEMICAL INTERCALATION
UR - http://www.scopus.com/inward/record.url?scp=85062585450&partnerID=8YFLogxK
U2 - 10.1021/acsami.8b20115
DO - 10.1021/acsami.8b20115
M3 - Article
C2 - 30741532
AN - SCOPUS:85062585450
VL - 11
SP - 9291
EP - 9300
JO - ACS applied materials & interfaces
JF - ACS applied materials & interfaces
SN - 1944-8244
IS - 9
ER -
ID: 18815255