Boosting the lithium-ion storage performance of perovskite Sr_(x)VO_(3-δ)
via Sr cation and O anion deficient engineering

作     者：Xiaolei Li Zifeng Lin Na Jin Xiaojiao Yang Lei Sun Yuan Wang Lei Xie Xiping Chen Li Lei Patrick Rozier Patrice Simon Ying Liu 李小磊;林紫锋;金娜;杨晓娇;孙雷;王园;谢雷;陈喜平;雷力;Patrick Rozier;Patrice Simon;刘颖

作者机构：College of Materials Science and EngineeringSichuan UniversityChengdu 610065China Key Laboratory of Neutron Physics and Institute of Nuclear Physics and ChemistryChina Academy of Engineering PhysicsMianyang 621999China Institute of Atomic and Molecular PhysicsSichuan UniversityChengdu 610065China CIRIMATUMR CNRS 5085UniversitéToulouse III Paul SabatierToulouse 31062France RS2ERéseau Français sur le Stockage Electrochimique de l’EnergieFR CNRS 3459Amiens Cedex 80039France 

基　　金：supported by the National Double First-Class Universities Construction Grant of Sichuan University(2020SCUNG201) the National Natural Science Foundation of China (52072252 and 51902215) Fundamental Research Funds for the Central Universities China (YJ201886) State Key Laboratory of Polymer Materials Engineering China(sklpme2021-JX-01) the Agence Nationale de la Recherche (Labex STORE-EX),France for financial support 

出 版 物：《Science Bulletin》 (科学通报（英文版）)

年 卷 期：2022年第67卷第22期

页      码：2305-2315页

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.

主 题 词：Perovskite Sr vacancy Non-stoichiometric Sr_(x)VO_(3-δ) O vacancy Defective-based engineering 

学科分类：0808[工学-自动化类] 08[工学] 080501[080501] 0805[工学-能源动力学] 

核心收录：

D　O　I：10.1016/j.scib.2022.11.006

馆 藏 号：203115565...