Enhanced ionic conductivity with Li7O2Br3 phase in Li3OBr anti-perovskite solid electrolyte

Zhu, Jinlong; Li, Shuai; Zhang, Yi; Howard, John W.; Lu, Xujie; Li, Yutao; Wang, Yonggang; Kumar, Ravhi S.; Wang, Liping; Zhao, Yusheng

doi:10.1063/1.4962437

Enhanced ionic conductivity with Li₇O₂Br₃ phase in Li₃OBr anti-perovskite solid electrolyte

Journal Article · Wed Sep 07 00:00:00 EDT 2016 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4962437· OSTI ID:1331273

Zhu, Jinlong ^[1]; Li, Shuai ^[1]; Zhang, Yi ^[1]; Howard, John W. ^[1]; Lu, Xujie ^[2]; Li, Yutao ^[3]; Wang, Yonggang ^[1]; ^[1]; Wang, Liping ^[1]; Zhao, Yusheng ^[4]

Univ. of Nevada, Las Vegas, NV (United States)
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Univ. of Texas at Austin, Austin, TX (United States)
Univ. of Nevada, Las Vegas, NV (United States); South Univ. of Science and Technology of China, Guangdong (China)

Cubic anti-perovskites with general formula Li₃OX (X = Cl, Br, I) were recently reported as superionic conductors with the potential for use as solid electrolytes in all-solid-state lithium ion batteries. These electrolytes are nonflammable, low-cost, and suitable for thermoplastic processing. However, the primary obstacle of its practical implementation is the relatively low ionic conductivity at room temperature. In this work, we synthesized a composite material consisting of two anti-perovskite phases, namely, cubic Li₃OBr and layered Li₇O₂Br₃, by solid state reaction routes. The results indicate that with the phase fraction of Li₇O₂Br₃ increasing to 44 wt. %, the ionic conductivity increased by more than one order of magnitude compared with pure phase Li₃OBr. Formation energy calculations revealed the meta-stable nature of Li₇O₂Br₃, which supports the great difficulty in producing phase-pure Li₇O₂Br₃ at ambient pressure. Here, methods of obtaining phase-pure Li₇O₂Br₃ will continue to be explored, including both high pressure and metathesis techniques.

View Accepted Manuscript (DOE)

Research Organization:: Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Univ. of Nevada, Las Vegas, NV (United States)

Sponsoring Organization:: USDOE Advanced Research Projects Agency - Energy (ARPA-E)

Grant/Contract Number:: AC52-06NA25396; NA0001982

OSTI ID:: 1331273

Alternate ID(s):: OSTI ID: 1332396
OSTI ID: 1420460
OSTI ID: 22594290

Report Number(s):: LA-UR--16-21222

Journal Information:: Applied Physics Letters, Journal Name: Applied Physics Letters Journal Issue: 10 Vol. 109; ISSN APPLAB; ISSN 0003-6951

Publisher:: American Institute of Physics (AIP)Copyright Statement

Country of Publication:: United States

Language:: English

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Promises, Challenges, and Recent Progress of Inorganic Solid-State Electrolytes for All-Solid-State Lithium Batteries Gao, Zhonghui; Sun, Huabin; Fu, Lin Advanced Materials, Vol. 30, Issue 17 https://doi.org/10.1002/adma.201705702	journal	February 2018
Ion Conductivity Enhancement in Anti-Spinel Li ₃ OBr with Intrinsic Vacancies Hussain, Fiaz; Li, Pai; Li, Zhenyu Advanced Theory and Simulations, Vol. 2, Issue 3 https://doi.org/10.1002/adts.201800138	journal	November 2018
Correlating lattice distortions, ion migration barriers, and stability in solid electrolytes Kim, Kwangnam; Siegel, Donald J. Journal of Materials Chemistry A, Vol. 7, Issue 7 https://doi.org/10.1039/c8ta10989c	journal	January 2019
Insights into Grain Boundary in Lithium-Rich Anti-Perovskite as Solid Electrolytes Chen, Bingbing; Xu, Chaoqun; Zhou, Jianqiu Journal of The Electrochemical Society, Vol. 165, Issue 16 https://doi.org/10.1149/2.0831816jes	journal	January 2018

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Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
activation energies
crystal structure
electolytes
electrolytes
grain boundaries
ionic conductivity
layered structure
lithium ion battery
lithium-rich anti-perovskite
material science
solid electrolyte