The interplay between thermodynamics and kinetics in the solid-state synthesis of layered oxides
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Univ. of California, Berkeley, CA (United States); Karlsruhe Inst. of Technology (KIT) (Germany)
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Univ. of California, Berkeley, CA (United States)
- Univ. of California, Berkeley, CA (United States); Univ. of California, Santa Barbara, CA (United States)
- Univ. of California, Santa Barbara, CA (United States)
- Samsung Research America, Burlington, MA (United States)
- Brookhaven National Lab. (BNL), Upton, NY (United States)
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Univ. of Michigan, Ann Arbor, MI (United States)
In the synthesis of inorganic materials, reactions often yield non-equilibrium kinetic byproducts instead of the thermodynamic equilibrium phase. Understanding the competition between thermodynamics and kinetics is a fundamental step towards the rational synthesis of target materials. In this work, we use in situ synchrotron X-ray diffraction to investigate the multistage crystallization pathways of the important two-layer (P2) sodium oxides Na0.67MO2 (M = Co, Mn). We observe a series of fast non-equilibrium phase transformations through metastable three-layer O3, O3' and P3 phases before formation of the equilibrium two-layer P2 polymorph. We present a theoretical framework to rationalize the observed phase progression, demonstrating that even though P2 is the equilibrium phase, compositionally unconstrained reactions between powder precursors favour the formation of non-equilibrium three-layered intermediates. These insights can guide the choice of precursors and parameters employed in the solid-state synthesis of ceramic materials, and constitutes a step forward in unravelling the complex interplay between thermodynamics and kinetics during materials synthesis.
- Research Organization:
- Brookhaven National Lab. (BNL), Upton, NY (United States). National Synchrotron Light Source II (NSLS-II); Energy Frontier Research Centers (EFRC) (United States). Center for Next Generation of Materials Design (CNGMD); Argonne National Lab. (ANL), Argonne, IL (United States). Advanced Photon Source (APS); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Molecular Foundry
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES); Samsung Advanced Institute of Technology; National Science Foundation (NSF)
- Grant/Contract Number:
- SC0012704; UGA-0-41029-16/ER392000; DMR-1332208; AC02-06CH11357; AC02-05CH11231
- OSTI ID:
- 1633027
- Alternate ID(s):
- OSTI ID: 1633290
- Report Number(s):
- BNL-216004-2020-JAAM
- Journal Information:
- Nature Materials, Vol. 19, Issue 10; ISSN 1476-1122
- Publisher:
- Springer Nature - Nature Publishing GroupCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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