摘要：Perovskite srVO_(3) has been investigated as a promising lithium storage anode where the V cation plays the role of the redox center,combining excellent cycle stability and safe operating potential versus Li metal plating,with limited ***,we demonstrate the possibility to boost the lithium storage properties,by reducing the non-redox active sr cation content and fine-tuning the O anion vacancies while maintaining a non-stoichiometric sr_(x)VO_(3-δ) perovskite *** investigations suggest that sr vacancy can work as favorable Li^(+) storage sites and preferential transport channels for guest Li^(+) ions,contributing to the increased specific capacity and rate *** contrast,inducing O anion vacancy in sr_(x)VO_(3-δ) can improve rate performance while compromising the specific *** experimental results confirm the enhancement of specific capacities by fine adjusting the sr and O vacancies,with a maximum capacity of 444 mAh g^(-1) achieved with sr_(0.63)VO_(3-δ),which is a 37%increase versus stoichiometric srVO_(3).Although rich defects have been induced,sr_(x)VO_(3-δ) electrodes maintain a stable perovskite structure during cycling versus a LiFePO_(4) cathode,and the full-cell could achieve more than 6000 discharge/charge cycles with 80%capacity *** result highlights the possibility to use the cation defective-based engineering approach to design high-capacity perovskite oxide anode materials.