Perovskite-Type SrVO as High-Performance Anode Materials for Lithium-Ion Batteries.

Perovskite-type oxides, characterized by excellent multifunctional physical and chemical properties, are widely used in ferroelectric, piezoelectric, energy conversion, and storage applications. It is shown here that the perovskite-type SrVO can achieve excellent electrochemical performance as lithium-ion battery anodes thanks to its high electrically and ionically conductivity. Conducting additive-free SrVO electrodes can deliver a high specific capacity of 324 mAh g at a safe and low average working potential of ≈0.9 V vs Li/Li together with excellent high-rate performance. A high areal capacity of ≈5.4 mAh cm is obtained using an ultrathick (≈120 μm) electrode. Moreover, the fully lithiated SrVO electrode exhibits only 2.3% volume expansion that is explained by a simple solid-solution Li -storage mechanism, resulting in good cycling stability of the electrode. This study highlights the perovskite-type SrVO as a promising Li -storage anode and provides opportunities for exploring a variety of perovskite oxides as next-generation metal-ion battery anodes.