文献类型：期刊文献

英文题名：Lattice Engineered P2-Type Cathodes with Enhanced Phase-Transition Reversibility and Diffusion Kinetics for High-Power Na-Ion Batteries

作者：Zhao, Mingyi[1];Yu, Haifeng[2];Demir, Muslum[4];Cheng, Qilin[1];Chen, Ling[1];Zhang, Haijiao[3];Jiang, Hao[1,2]

机构：[1]East China Univ Sci & Technol, Sch Mat Sci & Engn, Key Lab Ultrafine Mat, Minist Educ, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Shanghai Engn Res Ctr Hierarch Nanomat, Sch Chem Engn, Shanghai 200237, Peoples R China;[3]Shanghai Univ, Inst Nanochem & Nanobiol, Sch Environm & Chem Engn, Shanghai 200444, Peoples R China;[4]Bogazici Univ, Dept Chem Engn, TR-34342 Istanbul, Turkiye

年份：2026

卷号：14

期号：3

起止页码：1275

外文期刊名：ACS SUSTAINABLE CHEMISTRY & ENGINEERING

收录：;EI(收录号：20260419964785);WOS:【SCI-EXPANDED(收录号:WOS:001662049900001)】；

基金：This work was supported by the Program for Shanghai Pilot Program for Basic Research (22TQ1400100-13), the National Natural Science Foundation of China (22308103), and the Fundamental Research Funds for the Central Universities.

语种：英文

外文关键词：P2-type cathode; Ni-Mn based layered oxides; doping modification; high-power; Na-ion batteries

摘要：P2-type Na0.67Ni0.33Mn0.67O2 has emerged as a promising cathode material for sodium-ion batteries (SIBs) owing to its high operating voltage (>3.5 V) and considerable theoretical capacity (similar to 173 mAh g(-1)). Nevertheless, its practical performance is largely hindered by sluggish Na+ kinetics, primarily originating from Na+/vacancy ordering and an irreversible P2-O2 phase transition upon deep desodiation. In this work, a dual-doping strategy is employed to develop Na0.67Mg0.05Ni0.28Mn0.57Ti0.1O2 (TiMg-P2O), in which Ti4+ substitution in the transition metal layer stabilizes the oxygen sublattice via strong Ti-O covalent bonding, effectively suppressing lattice oxygen instability and Na+/vacancy rearrangement. Meanwhile, the incorporation of Mg2+ in both the transition metal (TM) and sodium (Na) layers, with Mg in the sodium layer acting as a structural "pillar", maintains the interlayer spacing and preserves the stability of fast Na+ diffusion pathways even in a deeply desodiated state. As a result, the TiMg-P2O cathode delivers a reversible capacity of 107 mAh g(-1) at 1C and retains 97 mAh g(-1) at 5C, significantly outperforming the pristine P2O cathode (76 mAh g(-1) and 22 mAh g(-1)). This study highlights a practical and scalable codoping strategy to engineer robust P2-type layered oxides with enhanced electrochemical performance for next-generation SIBs.