Low Temperature Epitaxial LiMn 2 O 4 Cathodes Enabled by NiCo 2 O 4 Current Collector for High-Performance Microbatteries.

Autor: Lovett AJ; Department of Materials Science and Metallurgy, University of Cambridge, 27 Charles Babbage Road, Cambridge CB3 0FS, United Kingdom., Daramalla V; Cavendish Laboratory, University of Cambridge, JJ Thompson Avenue, Cambridge CB3 0HE, United Kingdom.; The Faraday Institution, Quad One, Harwell Campus, Didcot OX11 0RA, United Kingdom., Sayed FN; The Faraday Institution, Quad One, Harwell Campus, Didcot OX11 0RA, United Kingdom.; Yusef Hamied Department of Chemistry, Lensfield Rd., Cambridge CB2 1EW, United Kingdom., Nayak D; Department of Materials Science and Metallurgy, University of Cambridge, 27 Charles Babbage Road, Cambridge CB3 0FS, United Kingdom.; The Faraday Institution, Quad One, Harwell Campus, Didcot OX11 0RA, United Kingdom., de H-Óra M; Department of Materials Science and Metallurgy, University of Cambridge, 27 Charles Babbage Road, Cambridge CB3 0FS, United Kingdom., Grey CP; The Faraday Institution, Quad One, Harwell Campus, Didcot OX11 0RA, United Kingdom.; Yusef Hamied Department of Chemistry, Lensfield Rd., Cambridge CB2 1EW, United Kingdom., Dutton SE; Cavendish Laboratory, University of Cambridge, JJ Thompson Avenue, Cambridge CB3 0HE, United Kingdom.; The Faraday Institution, Quad One, Harwell Campus, Didcot OX11 0RA, United Kingdom., MacManus-Driscoll JL; Department of Materials Science and Metallurgy, University of Cambridge, 27 Charles Babbage Road, Cambridge CB3 0FS, United Kingdom.
Jazyk: angličtina
Zdroj: ACS energy letters [ACS Energy Lett] 2023 Jul 18; Vol. 8 (8), pp. 3437-3442. Date of Electronic Publication: 2023 Jul 18 (Print Publication: 2023).
DOI: 10.1021/acsenergylett.3c01094
Abstrakt: Epitaxial cathodes in lithium-ion microbatteries are ideal model systems to understand mass and charge transfer across interfaces, plus interphase degradation processes during cycling. Importantly, if grown at <450 °C, they also offer potential for complementary metal-oxide-semiconductor (CMOS) compatible microbatteries for the Internet of Things, flexible electronics, and MedTech devices. Currently, prominent epitaxial cathodes are grown at high temperatures (>600 °C), which imposes both manufacturing and scale-up challenges. Herein, we report structural and electrochemical studies of epitaxial LiMn 2 O 4 (LMO) thin films grown on a new current collector material, NiCo 2 O 4 (NCO). We achieve this at the low temperature of 360 °C, ∼200 °C lower than existing current collectors SrRuO 3 and LaNiO 3 . Our films achieve a discharge capacity of >100 mAh g -1 for ∼6000 cycles with distinct LMO redox signatures, demonstrating long-term electrochemical stability of our NCO current collector. Hence, we show a route toward high-performance microbatteries for a range of miniaturized electronic devices.
Competing Interests: The authors declare no competing financial interest.
(© 2023 The Authors. Published by American Chemical Society.)
Databáze: MEDLINE
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