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We have reported the effects of substituting a transition metal in silicide on the electrochemical performance of the silicide/Si composite anode for lithium-ion batteries (LIBs); the Cr 0.5 V 0.5 Si 2 /Si electrode exhibited much better cyclability compared with CrSi 2 /Si and VSi 2 /Si electrodes. Herein, we investigated the electrochemical performance of a Cr  x  V 1- x  Si 2 /Si slurry electrode for its application in LIBs, and the results obtained were compared to those of a gas deposition (GD) electrode, which was comprised of only active materials. The slurry electrode exhibited a superior cycling life as with the GD electrode. After charge-discharge cycles, the expansion of the electrode thickness of CrSi 2 /Si and Cr 0.5 V 0.5 Si 2 /Si was smaller than that of VSi 2 /Si, and VSi 2 was significantly pulverized compared with the other silicides. It is considered that VSi 2 deformed easily by the stress from Si expansion and pulverized because the hardness of VSi 2 was the smallest among the silicides used in this study. These results reveal that Cr 0.5 V 0.5 Si 2 /Si has great potential as an anode material for next-generation LIBs and hardness is an important property for compositing silicide with Si.

Anode Properties of CrxV1–xSi2/Si Composite Electrodes for Lithium-Ion Batteries

Anode Properties of Cr_xV_1–xSi₂/Si Composite Electrodes for Lithium-Ion Batteries