Biphase-to-monophase structure evolution of Na_(0.766+x)Li_(x)Ni_(0.33-x)Mn_(0.5)Fe_(0.1)Ti_(0.07)O_(2) toward ultradurable Na-ion batteries
作者机构：State Key Laboratory of Electrical Insulation and Power EquipmentSchool of Electrical EngineeringCenter of Nanomaterials for Renewable EnergyXi'an Jiaotong UniversityXi'anShaanxiChina Jiangsu Key Laboratory of Advanced Negative Carbon TechnologiesInstitute of Functional Nano&Soft Materials(FUNSOM)Soochow UniversitySuzhouJiangsuChina Fujian Provincial Key Laboratory of Quantum Manipulation and New Energy MaterialsCollege of Physics and EnergyFujian Normal UniversityFuzhouFujianChina Wenzhou Key Laboratory of Sodium-Ion BatteriesInstitute for Carbon NeutralizationWenzhou University Technology InnovationWenzhouZhejiangChina
出 版 物：《Carbon Energy》 (碳能源（英文）)
年 卷 期：2024年第6卷第9期
页 面：66-79页
核心收录：
基 金：This work was supported by the National Natural Science Foundation of China(52102302,51807146,and 22179021) the Young Talent Support Plan of Xi'an Jiaotong University(Grant No.DQ6J011) Natural Science Foundation of Shaanxi Province(2023-JC-QN-0115) State Key Laboratory of Electrical Insulation and Power Equipment(EIPE23313) the Fundamental Research Funds for the Central Universities(xyz012023165)
主 题：electrochemistry Li+substitution Na-ion batteries O_(3)phase phase transition
摘 要：Layered composite oxide materials with O3/P2 biphasic crystallographic structure typically demonstrate a combination of high capacities of the O3 phase and high operation voltages of the P2 ***,their practical applications are seriously obstructed by difficulties in thermodynamic phase regulation,complicated electrochemical phase transition,and unsatisfactory cycling ***,we propose an efficient structural evolution strategy from biphase to monophase of Na_(0.766+x)Li_(x)Ni_(0.33-x)Mn_(0.5)Fe_(0.1)Ti_(0.07)O_(2) through Li+*** role of Li+substitution not only simplifies the unfavorable phase transition by altering the local coordination of transition metal(TM)cations but also stabilizes the cathode–electrolyte interphase to prevent the degradation of TM cations during battery *** a result,the thermodynamically robust O_(3)-Na_(0.826)Li_(0.06)Ni_(0.27)Mn_(0.5)Fe_(0.1)Ti_(0.07)O_(2) cathode delivers a high capacity of 139.4 mAh g^(-1) at 0.1 C and shows prolonged cycling life at high rates,with capacity retention of 81.6%at 5 C over 500 *** work establishes a solid relationship between the thermodynamic structure evolution and electrochemistry of layered cathode materials,contributing to the development of long-life sodium-ion batteries.
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