DOE OSTI · 2483690
Coherent-Precipitation-Stabilized Phase Formation in Over-Stoichiometric Rocksalt-Type Li Superionic Conductors
Abstract
Rationalizing synthetic pathways is crucial for material design and property optimization, especially for polymorphic and metastable phases. Over-stoichiometric rocksalt (ORX) compounds, characterized by their face-sharing configurations, are a promising group of materials with unique properties; however, their development is significantly hindered by challenges in synthesizability. Here, taking the recently identified Li superionic conductor, over-stoichiometric rocksalt Li–In–Sn–O (o-LISO) material as a prototypical ORX compound, the mechanisms of phase formation are systematically investigated. It is revealed that the spinel-like phase with unconventional stoichiometry forms as coherent precipitate from the high-temperature-stabilized cation-disordered rocksalt phase upon fast cooling. This process prevents direct phase decomposition and kinetically locks the system in a metastable state with the desired face-sharing Li configurations. This insight enables us to enhance the ionic conductivity of o-LISO to be >1 mS cm -1 at room temperature through low-temperature post-annealing. This work offers insights into the synthesis of ORX materials and highlights important opportunities in this new class of materials.
Explore related subjects
Keep this discovery
Explore connections, maps & timelines
Chen, Yu [University of California, Berkeley, CA (United States); Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)] (ORCID:0000000254207571), Zhao, Xinye [University of California, Berkeley, CA (United States); Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)], Chen, Ke [Brookhaven National Laboratory (BNL), Upton, NY (United States)], Koirala, Krishna Prasad [Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)], Giovine, Raynald [University of California, Berkeley, CA (United States)], Yang, Xiaochen [University of California, Berkeley, CA (United States); Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)], Wang, Shilong [University of California, Berkeley, CA (United States); Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)], Szymanski, Nathan J. [University of California, Berkeley, CA (United States); Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)], Xiong, Shuoyan [University of California, Berkeley, CA (United States)], Lun, Zhengyan [University of Chinese Academy of Sciences, Beijing (China)], Ji, Huiwen [Univ. of Utah, Salt Lake City, UT (United States)], Wang, Chongmin [Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)], Bai, Jianming [Brookhaven National Laboratory (BNL), Upton, NY (United States)], Wang, Feng [Argonne National Laboratory (ANL), Argonne, IL (United States)], Ouyang, Bin [Florida State Univ., Tallahassee, FL (United States)], Ceder, Gerbrand [University of California, Berkeley, CA (United States); Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)] (ORCID:0000000192753605). 2024-12-23. Coherent-Precipitation-Stabilized Phase Formation in Over-Stoichiometric Rocksalt-Type Li Superionic Conductors. https://doi.org/10.1002/adma.202416342
Cite the original work for its findings. Save a collection to share your selection of sources.