TY - JOUR
T1 - Preparation of Li-Excess and Li-Deficient Antiperovskite Structured Li2+ xOH1- xBr and Their Effects on Total Ionic Conductivity
AU - Sugumar, Manoj Krishna
AU - Yamamoto, Takayuki
AU - Ikeda, Kazutaka
AU - Motoyama, Munekazu
AU - Iriyama, Yasutoshi
N1 - Funding Information:
This work was supported by JSPS KAKENHI Grant JP18K14318 and, in part, by Grants JP19H05813 and JP19H05814 (Grant-in-Aid for Scientific Research on Innovative Areas “Interface IONICS”). The synchrotron XRD measurements were conducted at beamline BL5S2 of Aichi Synchrotron Radiation Center, Aichi Science & Technology Foundation, Aichi, Japan (Proposals 2019L4001 and 2019L5001) with the financial support of the Synchrotron Radiation Research Center, Nagoya University. The neutron experiment at beamline BL21 of the Materials and Life Science Experimental Facility in the J-PARC was performed under the Neutron Scattering Program Advisory Committee of IMSS, KEK (Proposal No. 2019S06). M.K.S. thankfully acknowledges the financial assistance from the Yoshida Scholarship Foundation.
Publisher Copyright:
© 2022 American Chemical Society. All rights reserved.
PY - 2022/3/21
Y1 - 2022/3/21
N2 - This paper describes about the effect of Li-H exchange amount on total lithium-ion (Li+) conductivity of Li2+xOH1-xBr (x = -0.5 to +0.4). These samples are systematically prepared at room temperature by a dry ball-milling process using LiOH, LiOH·H2O, Li2O, and LiBr as starting materials. Synchrotron X-ray diffraction analysis reveals that single-phase Li2+xOH1-xBr samples are formed within x = -0.5 to +0.35. For improving total Li+conductivity (σt), a larger x value increases both the Li carrier density and lattice constant as positive factors, while that decreases both the crystallite size and OH rotational unit possibly assisting Li+conduction as negative factors. This trade-off provides an optimized σtof 3.6 × 10-6S cm-1at the Li-excess Li2.2OH0.8Br composition, which is ca. 3 times higher than pristine Li2OHBr (1.1 × 10-6S cm-1). The hydrogen incorporation into the lattice is confirmed by neutron diffraction analysis, and the refined composition is almost consistent with the prepared composition.
AB - This paper describes about the effect of Li-H exchange amount on total lithium-ion (Li+) conductivity of Li2+xOH1-xBr (x = -0.5 to +0.4). These samples are systematically prepared at room temperature by a dry ball-milling process using LiOH, LiOH·H2O, Li2O, and LiBr as starting materials. Synchrotron X-ray diffraction analysis reveals that single-phase Li2+xOH1-xBr samples are formed within x = -0.5 to +0.35. For improving total Li+conductivity (σt), a larger x value increases both the Li carrier density and lattice constant as positive factors, while that decreases both the crystallite size and OH rotational unit possibly assisting Li+conduction as negative factors. This trade-off provides an optimized σtof 3.6 × 10-6S cm-1at the Li-excess Li2.2OH0.8Br composition, which is ca. 3 times higher than pristine Li2OHBr (1.1 × 10-6S cm-1). The hydrogen incorporation into the lattice is confirmed by neutron diffraction analysis, and the refined composition is almost consistent with the prepared composition.
UR - http://www.scopus.com/inward/record.url?scp=85126511382&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85126511382&partnerID=8YFLogxK
U2 - 10.1021/acs.inorgchem.1c03657
DO - 10.1021/acs.inorgchem.1c03657
M3 - Article
C2 - 35258960
AN - SCOPUS:85126511382
VL - 61
SP - 4655
EP - 4659
JO - Inorganic Chemistry
JF - Inorganic Chemistry
SN - 0020-1669
IS - 11
ER -