The ORCID identification number(s) for the author(s) of this article can be found under https://doi.org/10.1002/smtd.202101111. Figure 7. Solid electrolyte interphase (SEI) formation process and structural evolution of SnO 2 (a), SnO 2 -LiF and SnO 2 -Li 2 CO 3 electrodes (b).

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In this work we surprisingly find that the reaction mechanism, Li-ion diffusion kinetics, and polycrystalline sphalerite structure of the InSb anode materials remain unchanged during the charging and discharging process at both room and sub-zero temperatures. The sputtered pure InSb film anodes can stably cycle more than 800 times at 1 A/g and deliver a high capacity of 534.6 mAh/g at 30 °C. With a high current rate of 2 A/g at −40 °C, a capacity of 402.8 mAh/g can be maintained. For the ball-milled InSb/graphite composite, a capacity of 434.3 mAh/g at 1 A/g can remain very stable for more than 700 cycles at both 30 °C and −50 °C. The 2500 mAh soft pack cells, which are made entirely from the commercialization process and successfully run long-term at −30 °C, also demonstrate the potential of InSb anodes for commercial applications.