苏州工学院学报2026，Vol.40Issue(2)：12-15,4.
高性能钠离子电池O3型层状正极材料中金属氧配体的共价调控
Covalency Regulation of Metal-Oxygen Ligand in O3-type Layered Cathode Material for High-Performance Sodium-Ion Batteries
摘要
Abstract
O3-type nickel-manganese-based layered cathodes are appealing for building high-energy sodium-ion batteries(SIBs)in growing energy storage application.However,the complicated phase transitions and sluggish Na+kinetics have largely impeded their practical applications.Herein,this work proposes a dual-site doping strategy for O3-type NaNi0.5 Mn0.5 O2 cathode to regulate the covalency of Ni/Mn-O bonds via reinforcing TM-O bonding strength.The designed O3-Na0.92 Ni0.47 Nb0.03 Mn0.30 Ti0.20O2(NNNMTO)demonstrates an excellent rate capability of 53 mAh/g at 10 C and a long-term cyclic stability of 70%capacity retention after 500 cycles at 2 C under a wide working voltage range between 2.0～4.2 V,along with less moisture sensitivity.Additionally,the full battery paired with commercial hard carbon anode displays an impressive cycling stability with an energy density of 260 Wh/kg based on the active material mass of both electrodes,making its practical operation possible.This work provides insightful perspectives in facilitating Na+diffusion and mitigating the undesirable phase transition for layered oxide cathode materials of high-energy SIBs.关键词
层状过渡金属氧化物/共价增强/高倍率性能/钠离子电池Key words
layered transition-metal oxides/covalency reinforcing/high-rate performance/sodium-ion batteries分类
能源科技引用本文复制引用
范丽雨,汪李子涵,张子明,吴大军,孙陈诚,钱斌,陶石..高性能钠离子电池O3型层状正极材料中金属氧配体的共价调控[J].苏州工学院学报,2026,40(2):12-15,4.基金项目
苏州工学院大学生创新创业训练计划项目"高熵掺杂O3相层状氧化物钠离子电池正极材料制备与应用"(Grant No.X202510333117) （Grant No.X202510333117）
苏州工学院自制实验仪器设备经费资助(Grant No.202408) （Grant No.202408）
