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Low Temperature Epitaxial LiMn2O4 Cathodes Enabled by NiCo2O4 Current Collector for High-Performance Microbatteries AITranslate

Adam J. Lovett; Venkateswarlu Daramalla; Farheen N. Sayed; Debasis Nayak; Muireann de hÓra; Clare P. Grey; Siân E. Dutton; Judith L. MacManusDriscoll;
University of Cambridge; University of Cambridge;The Faraday Institution, Quad One; University of Cambridge; University of Cambridge;The Faraday Institution, Quad One; University of Cambridge; University of Cambridge
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Publisher: ACS
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Abstract AITranslate

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 LiMn2O4 (LMO) thin films grown on a new current collector material, NiCo2O4 (NCO). We achieve this at the low temperature of 360 °C, ∼200 °C lower than existing current collectors SrRuO3 and LaNiO3. 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.

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DOI：https://doi.org/10.1021/acsenergylett.3c01094

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Citation Information:

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 LiMn2O4 (LMO) thin films grown on a new current collector material, NiCo2O4 (NCO). We achieve this at the low temperature of 360 °C, ∼200 °C lower than existing current collectors SrRuO3 and LaNiO3. 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.

quote

GB/T 7714-2015 [1] Adam J. Lovett, Venkateswarlu Daramalla, Farheen N. Sayed, et al. ACS Energy Letters, 2023(8). DOI:10.1021/acsenergylett.3c01094.
MLA [1] Adam J. Lovett, et al., ACS Energy Letters, no. 8, 2023, https://doi.org/10.1021/acsenergylett.3c01094.
APA [1] Adam J. Lovett, Venkateswarlu Daramalla, Farheen N. Sayed, Debasis Nayak, Muireann de hÓra, Clare P. Grey, Siân E. Dutton, & Judith L. MacManusDriscoll. (2023). ACS Energy Letters(8). https://doi.org/10.1021/acsenergylett.3c01094
IEEE [1] Adam J. Lovett, Venkateswarlu Daramalla, Farheen N. Sayed, Debasis Nayak, Muireann de hÓra, Clare P. Grey, Siân E. Dutton, and Judith L. MacManusDriscoll, ACS Energy Letters, no. 8, 2023, doi: 10.1021/acsenergylett.3c01094.