TY - JOUR
T1 - Stabilizing Superionic-Conducting Structures via Mixed-Anion Solid Solutions of Monocarba-closo-borate Salts
AU - Tang, Wan Si
AU - Yoshida, Koji
AU - Soloninin, Alexei V.
AU - Skoryunov, Roman V.
AU - Babanova, Olga A.
AU - Skripov, Alexander V.
AU - Dimitrievska, Mirjana
AU - Stavila, Vitalie
AU - Orimo, Shin Ichi
AU - Udovic, Terrence J.
N1 - Funding Information:
This work was performed, in part, in collaboration between members of IEA HIA Task 32−Hydrogen-based Energy Storage. The authors gratefully acknowledge support from the Collaborative Research Center on Energy Materials, Tohoku University; JSPS KAKENHI under Grant Nos. 25220911 and 26820311; the Russian Federal Agency of Scientific Organizations under Program “Spin” No. 01201463330; and the Russian Foundation for Basic Research under Grant No. 15-03-01114. M.D. gratefully acknowledges research support from the U.S. DOE Office of Energy Efficiency and Renewable Energy, Fuel Cell Technologies Office, under Contract No. DE-AC36-08GO28308. Sandia National Laboratories is a multiprogram laboratory managed and operated by Sandia Corporation, a wholly owned subsidiary of Lockheed Martin Corporation, for the U.S. DOE’s National Nuclear Security Administration under Contract No. DE-AC04-94AL85000. This work utilized facilities supported in part by the National Science Foundation under Agreement DMR-0944772.
Publisher Copyright:
© 2016 American Chemical Society.
PY - 2016/10/14
Y1 - 2016/10/14
N2 - Solid lithium and sodium closo-polyborate-based salts are capable of superionic conductivities surpassing even liquid electrolytes, but often only at above-ambient temperatures where their entropically driven disordered phases become stabilized. Here we show by X-ray diffraction, quasielastic neutron scattering, differential scanning calorimetry, NMR, and AC impedance measurements that by introducing "geometric frustration" via the mixing of two different closo-polyborate anions, namely, 1-CB9H10 - and CB11H12 -, to form solid-solution anion-alloy salts of lithium or sodium, we can successfully suppress the formation of possible ordered phases in favor of disordered, fast-ion-conducting alloy phases over a broad temperature range from subambient to high temperatures. This result exemplifies an important advancement for further improving on the remarkable conductive properties generally displayed by this class of materials and represents a practical strategy for creating tailored, ambient-temperature, solid, superionic conductors for a variety of upcoming all-solid-state energy devices of the future.
AB - Solid lithium and sodium closo-polyborate-based salts are capable of superionic conductivities surpassing even liquid electrolytes, but often only at above-ambient temperatures where their entropically driven disordered phases become stabilized. Here we show by X-ray diffraction, quasielastic neutron scattering, differential scanning calorimetry, NMR, and AC impedance measurements that by introducing "geometric frustration" via the mixing of two different closo-polyborate anions, namely, 1-CB9H10 - and CB11H12 -, to form solid-solution anion-alloy salts of lithium or sodium, we can successfully suppress the formation of possible ordered phases in favor of disordered, fast-ion-conducting alloy phases over a broad temperature range from subambient to high temperatures. This result exemplifies an important advancement for further improving on the remarkable conductive properties generally displayed by this class of materials and represents a practical strategy for creating tailored, ambient-temperature, solid, superionic conductors for a variety of upcoming all-solid-state energy devices of the future.
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U2 - 10.1021/acsenergylett.6b00310
DO - 10.1021/acsenergylett.6b00310
M3 - Article
AN - SCOPUS:85014576122
SN - 2380-8195
VL - 1
SP - 659
EP - 664
JO - ACS Energy Letters
JF - ACS Energy Letters
IS - 4
ER -
