TY - JOUR
T1 - Structure and Dynamic Behavior of Sodium-Diglyme Complex in the Graphite Anode of Sodium Ion Battery by 2H Nuclear Magnetic Resonance
AU - Gotoh, Kazuma
AU - Maruyama, Hisashi
AU - Miyatou, Tatsuya
AU - Mizuno, Motohiro
AU - Urita, Koki
AU - Ishida, Hiroyuki
N1 - Funding Information:
This work was supported by JSPS Kakenhi (Grant 26870385) and New Energy and Industrial Technology Development Organization (NEDO) of Japan.
Publisher Copyright:
© 2016 American Chemical Society.
PY - 2016/12/15
Y1 - 2016/12/15
N2 - Cointercalation systems consisting of graphite, sodium, and some linear glycol ethers (glymes) are anticipated for use as negative electrodes in sodium ion batteries because of their superior properties such as outstanding cycle performance. We synthesized a ternary intercalation compound consisting of sodium, deuterated diglyme (diglyme-d14), and graphite by a solution reaction. Then we investigated the dynamics and coordination structure of diglyme-d14 molecules by 2H solid-state NMR. Two diglyme molecules coordinate to each sodium ion rigidly, except for rotation of the methyl groups at low temperatures below 233 K. At room temperature, diglyme weakly coordinates to a Na ion through one oxygen atom of the ligand and rotates around the O-Na axis. The active motion of sodium-diglyme complexes is favorable for Na diffusion between graphene layers in the graphite intercalation compound. (Figure Presented).
AB - Cointercalation systems consisting of graphite, sodium, and some linear glycol ethers (glymes) are anticipated for use as negative electrodes in sodium ion batteries because of their superior properties such as outstanding cycle performance. We synthesized a ternary intercalation compound consisting of sodium, deuterated diglyme (diglyme-d14), and graphite by a solution reaction. Then we investigated the dynamics and coordination structure of diglyme-d14 molecules by 2H solid-state NMR. Two diglyme molecules coordinate to each sodium ion rigidly, except for rotation of the methyl groups at low temperatures below 233 K. At room temperature, diglyme weakly coordinates to a Na ion through one oxygen atom of the ligand and rotates around the O-Na axis. The active motion of sodium-diglyme complexes is favorable for Na diffusion between graphene layers in the graphite intercalation compound. (Figure Presented).
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U2 - 10.1021/acs.jpcc.6b10962
DO - 10.1021/acs.jpcc.6b10962
M3 - Article
AN - SCOPUS:85006241090
SN - 1932-7447
VL - 120
SP - 28152
EP - 28156
JO - Journal of Physical Chemistry C
JF - Journal of Physical Chemistry C
IS - 49
ER -