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http://hdl.handle.net/10397/105848
Title: | Utilization of Li-rich phases in aluminum anodes for improved cycling performance through strategic thermal control | Authors: | Zheng, T Zhang, J Jin, W Boles, ST |
Issue Date: | 13-Feb-2023 | Source: | ACS applied energy materials, 13 Feb. 2023, v. 6, no. 3, p. 1845-1852 | Abstract: | Lithium-ion batteries with aluminum anodes had appeared to resolve critical dendrite issues of lithium metal cells in the 1970s. However, the poor cycling performance attributed to aluminum anodes would lead to their obsolescence. In this work, we demonstrate how strategic thermal control in cycling aluminum anodes circumvents the problematic α/β phase transformations that yield poor cycling life. Instead, electrochemical formation of the Li3Al2 and Li2–xAl phases necessitates temperatures slightly above ambient, as the Li3Al2 and Li2–xAl phases are key enablers for high capacity and stable cycling. While delivering a competitive capacity level (ca. 1 Ah kg–1-Al), cycling among those higher-order phases is found to be significantly improved, from several cycles to 100 cycles with ca. 67% capacity retention. Importantly, because modern battery charging is likely to occur above room temperature due to ohmic heating, the thermal conditions explored here are expected to be realized in a variety of applications. Furthermore, we show that elevated temperature is not necessary for aluminum anode delithiation, thus creating additional synergies with many practical scenarios. | Keywords: | Aluminum anode Asymmetrical thermal cycling Li-rich phases Lithium-ion battery Moderate temperatures Phase transformations |
Publisher: | American Chemical Society | Journal: | ACS applied energy materials | EISSN: | 2574-0962 | DOI: | 10.1021/acsaem.2c03673 | Rights: | © 2023 The Authors. Published by American Chemical Society. This publication is licensed under CC-BY 4.0 (https://creativecommons.org/licenses/by/4.0/). The following publication Zheng, T., Zhang, J., Jin, W., & Boles, S. T. (2023). Utilization of Li-Rich Phases in Aluminum Anodes for Improved Cycling Performance through Strategic Thermal Control. ACS Applied Energy Materials, 6(3), 1845-1852 is available at https://doi.org/10.1021/acsaem.2c03673. |
Appears in Collections: | Journal/Magazine Article |
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Zheng_Utilization_Li-Rich_Phases.pdf | 2.21 MB | Adobe PDF | View/Open |
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