Size-dependent kinetics during non-equilibrium lithiation of nano-sized zinc ferrite
- State Univ. of New York (SUNY), Plattsburgh, NY (United States); Stony Brook Univ., NY (United States). Dept. of Materials Science and Chemical Engineering
- Brookhaven National Lab. (BNL), Upton, NY (United States). Dept. of Condensed Matter Physics
- State Univ. of New York (SUNY), Plattsburgh, NY (United States); Stony Brook Univ., NY (United States). Dept. of Chemistry
- Univ. of Texas, Austin, TX (United States). Materials Science and Engineering Program and Dept. of Mechanical Engineering
- State Univ. of New York (SUNY), Plattsburgh, NY (United States); Stony Brook Univ., NY (United States). Dept. of Materials Science and Chemical Engineering, and Dept. of Chemistry; Brookhaven National Lab. (BNL), Upton, NY (United States)
- Brookhaven National Lab. (BNL), Upton, NY (United States). Center for Functional Nanomaterials (CFN)
- State Univ. of New York (SUNY), Plattsburgh, NY (United States); Stony Brook Univ., NY (United States). Dept. of Materials Science and Chemical Engineering, and Dept. of Chemistry
- Univ. of Pennsylvania, Philadelphia, PA (United States). Dept. of Materials Science and Engineering
Spinel transition metal oxides (TMOs) have emerged as promising anode materials for lithium-ion batteries. It has been shown that reducing their particle size to nanoscale dimensions benefits overall electrochemical performance. Here, we use in situ transmission electron microscopy to probe the lithiation behavior of spinel ZnFe2O4 as a function of particle size. We have found that ZnFe2O4 undergoes an intercalation-to-conversion reaction sequence, with the initial intercalation process being size dependent. Larger ZnFe2O4 particles (40 nm) follow a two-phase intercalation reaction. In contrast, a solid-solution transformation dominates the early stages of discharge when the particle size is about 6–9 nm. Using a thermodynamic analysis, we find that the size-dependent kinetics originate from the interfacial energy between the two phases. Furthermore, the conversion reaction in both large and small particles favors {111} planes and follows a core-shell reaction mode. Finally, these results elucidate the intrinsic mechanism that permits fast reaction kinetics in smaller nanoparticles.
- Research Organization:
- Energy Frontier Research Centers (EFRC) (United States). Center for Mesoscale Transport Properties (m2mt); Brookhaven National Laboratory (BNL), Upton, NY (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- Grant/Contract Number:
- SC0012704
- OSTI ID:
- 1493184
- Report Number(s):
- BNL-211237-2019-JAAM
- Journal Information:
- Nature Communications, Vol. 10, Issue 1; ISSN 2041-1723
- Publisher:
- Nature Publishing GroupCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
Phase evolution of conversion-type electrode for lithium ion batteries
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journal | May 2019 |
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