DataVXACS Energy LettersPaper
journal article·2016-10-14Open access

Stabilizing Superionic-Conducting Structures via Mixed-Anion Solid Solutions of Monocarba-closo-borate Salts

Wan Si Tang, Koji Yoshida, Alexei V. Soloninin, Roman V. Skoryunov, Olga A. Babanova, Alexander V. Skripov, Mirjana Dimitrievska, Vitalie Stavila, Shin-ichi Orimo, Terrence J. Udovic

ACS Energy Letters· Volume 1· Issue 4
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Abstract

High Resolution Image Download MS PowerPoint Slide 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-CB 9 H 10 – and CB 11 H 12 –, 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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Research context

Energy storageMetals & alloys

OpenAlex topics: Advanced Battery Materials and Technologies · Advancements in Battery Materials · Inorganic Chemistry and Materials

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

NIST Center for Neutron Research, National Institute of Standards and Technology, Gaithersburg, Maryland 20899-6102, United States

Department of Materials Science and Engineering, University of Maryland, College Park, Maryland 20742-2115, United States

Institute for Materials Research, Tohoku University, Sendai 980-8577, Japan

Institute of Metal Physics, Ural Branch of the Russian Academy of Sciences, Ekaterinburg 620990, Russia

National Renewable Energy Laboratory, Golden, Colorado 80401, United States

Energy Nanomaterials, Sandia National Laboratories, Livermore, California 94551, United States

WPI-Advanced Institute for Materials Research, Tohoku University, Sendai 980-8577, Japan

Funding

Russian Foundation for Basic Research · Fuel Cell Technologies Office · Japan Society for the Promotion of Science · Collaborative Research Center on Energy Materials, Tohoku University · Federal Agency for Scientific Organizations

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