High capacity Li-ion battery anodes: Impact of crystallite size, surface chemistry and PEG-coating

Journal Article · Wed Dec 06 00:00:00 EST 2017 · Electrochimica Acta

DOI:https://doi.org/10.1016/j.electacta.2017.12.010· OSTI ID:1431445

Minnici, Krysten ^[1]; Kwon, Yo Han ^[1]; Huie, Matthew M. ^[2]; de Simon, Mark V. ^[1]; Zhang, Bingjie ^[3]; Bock, David C. ^[4]; Wang, Jiajun ^[4]; Wang, Jun ^[4]; Takeuchi, Kenneth J. ^[5]; Takeuchi, Esther S. ^[6]; Marschilok, Amy C. ^[5]; Reichmanis, Elsa ^[7]

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1. Georgia Inst. of Technology, Atlanta, GA (United States). Dept. of Chemical and Biomolecular Engineering
2. Stony Brook Univ., NY (United States). Dept. of Materials Science and Engineering
3. Stony Brook Univ., NY (United States). Dept. of Chemistry
4. Brookhaven National Lab. (BNL), Upton, NY (United States). Energy Sciences Directorate
5. Stony Brook Univ., NY (United States). Dept. of Materials Science and Engineering and Dept. of Chemistry
6. Stony Brook Univ., NY (United States). Dept. of Materials Science and Engineering and Dept. of Chemistry; Brookhaven National Lab. (BNL), Upton, NY (United States). Energy Sciences Directorate
7. Georgia Inst. of Technology, Atlanta, GA (United States). Dept. of Chemical and Biomolecular Engineering and Dept. of Chemistry and Biochemistry and Dept. Materials Science and Engineering

Battery electrodes are complex mesoscale systems comprised of an active material, conductive agent, current collector, and polymeric binder. Previous work showed that introduction of poly [3-(potassium-4-butanoate) thiophene] (PPBT) as a binder component coupled with a polyethylene glycol (PEG) surface coating on magnetite (Fe₃O₄) nanoparticles enhanced electron and ion transport in the high capacity anode system. Here, the impact of Fe₃O₄ crystallite size (10 nm vs. 20 nm) and surface chemistry were explored to evaluate their effects on interfacial interactions within the composite PEG/PPBT based electrodes and resultant battery performance. The Fe₃O₄ synthesis methods inevitably lead to differences in surface chemistry. For instance, the Fe₃O₄ particles synthesized using ammonium hydroxide appeared more dispersed, and afforded improved rate capability performance. Notably, chemical interactions between the active nanoparticles and PPBT binder were only seen with particles synthesized using triethylamine. Capacity retention and cycling performance were unaffected. Thus, this study provides fundamental insights into the significant impact of active material synthesis on the design and fabrication of composite battery electrodes.

• Research Organization: Brookhaven National Lab. (BNL), Upton, NY (United States). National Synchrotron Light Source II (NSLS-II); Argonne National Lab. (ANL), Argonne, IL (United States). Advanced Photon Source (APS); Energy Frontier Research Centers (EFRC) (United States). Center for Mesoscale Transport Properties (m2M)
• Sponsoring Organization: USDOE Office of Science (SC), Basic Energy Sciences (BES); National Science Foundation (NSF); Georgia Inst. of Technology, Atlanta, GA (United States)
• Grant/Contract Number: SC0012704; SC0012673; AC02-06CH11357; 1109408
• OSTI ID: 1431445
• Alternate ID(s): OSTI ID: 1576866
• Report Number(s): BNL-203442-2018-JAAM
• Journal Information: Electrochimica Acta, Vol. 260, Issue C; ISSN 0013-4686
• Publisher: Elsevier
• Country of Publication: United States
• Language: English

Related Subjects

25 ENERGY STORAGE
36 MATERIALS SCIENCE
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
Fe3O4
Magnetite
Poly[3-(potassium-4-butanoate) thiophene]
Poly(thiophene)
Binders