Introducing Ce ions and oxygen vacancies into VO_(2)nanostructures with high specific surface area for efficient aqueous Zn-ion storage  

作　　者：Mingying Bao Zhengchunyu Zhang Xuguang An Baojuan Xi Shenglin Xiong 

机构地区：[1]Key Laboratory of Colloid and Interface Chemistry,Ministry of Education,School of Chemistry and Chemical Engineering,State Key Laboratory of Crystal Materials,Shandong University,Jinan 250100,China [2]School of Mechanical Engineering,Chengdu University,Chengdu 610106,China

出　　处：《ChemPhysMater》2025年第1期56-63,共8页化学物理材料(英文)

基　　金：supported by the National Natural Science Foundation of China(U21A2077);Natural Science Foundation of Shandong Province(ZR2021ZD05);Taishan Scholars Program of Shandong Province(ts20190908).

摘　　要：Positive electrodes play a decisive role in exploring the Zn^(2+)storage mechanism and improving the electrochemical performance of aqueous Zn-ion batteries(AZIBs).Feasible design and preparation of cathode materials have been crucial for AZIBs in recent years.Herein,taking the advantage of the tunnel structure of VO_(2),which can withstand volume change during charging/discharging,VO_(2)doped with Ce ions is synthesized by a simple one-step hydrothermal method and oxygen vacancies are synchronously generated during synthesis.It delivers a capacity of 158.5 mAh g^(−1)at the current density of 5 A g^(−1)after 1000 cycles and exhibits an excellent energy density of 312.8 Wh kg^(−1)at the power density of 142 W kg^(−1).The structural modification and prospect of enhancing its conductivity by doping with rare-earth metals and introducing oxygen vacancies may aid in improving the stability of AZIBs in the future.

关 键 词：Cathode Ce ions Oxygen vacancies Ce-VO_(2) Aqueous Zn-ion batteries 

分 类 号：O61[理学—无机化学]