Correction:Impact of Transition Metal Layer Vacancy on the Structure and Performance of P2 Type Layered Sodium Cathode Material

Following publication of the original article[1],the authors reported that the author Hun-Gi Jung should be affiliated as 3,4 and 5 instead of 4 and 5.The author’s name“A.-Yeon Kim”needed to be updated to“A-Yeon Kim”,removing the period.The correct author’s name and affiliation have been provided in this Correction.The original article[1]has been corrected.

Impact of Transition Metal Layer Vacancy on the Structure and Performance of P2 Type Layered Sodium Cathode Material

This study explores the impact of introducing vacancy in the transition metal layer of rationally designed Na_(0.6)[Ni_(0.3)Ru_(0.3)Mn_(0.4)]O_(2)(NRM)cathode material.The incorporation of Ru,Ni,and vacancy enhances the structural stability during extensive cycling,increases the operation voltage,and induces a capacity increase while also activating oxygen redox,respectively,in Na_(0.7)[Ni_(0.2)V_(Ni0.1)Ru_(0.3)Mn_(0.4)]O_(2)(V-NRM)compound.Various analytical techniques including transmission electron microscopy,X-ray absorption near edge spectroscopy,operando X-ray diffraction,and operando differential electrochemical mass spectrometry are employed to assess changes in the average oxidation states and structural distortions.The results demonstrate that V-NRM exhibits higher capacity than NRM and maintains a moderate capacity retention of 81%after 100 cycles.Furthermore,the formation of additional lone-pair electrons in the O 2p orbital enables V-NRM to utilize more capacity from the oxygen redox validated by density functional calculation,leading to a widened dominance of the OP4 phase without releasing O_(2) gas.These findings offer valuable insights for the design of advanced high-capacity cathode materials with improved performance and sustainability in sodium-ion batteries.

Recent Advances in Electrode Materials with Anion Redox Chemistry for Sodium-Ion Batteries

The development of sodium-ion batteries(SIBs),which are promising alternatives to lithium-ion batteries(LIBs),offers new opportunities to address the depletion of Li and Co resources;however,their implementation is hindered by their relatively low capacities and moderate operation voltages and resulting low energy densities.To overcome these limitations,considerable attention has been focused on anionic redox reactions,which proceed at high voltages with extra capacity.This manuscript covers the origin and recent development of anionic redox electrode materials for SIBs,including state-of-the-art P2-and O3-type layered oxides.We sequentially analyze the anion activity–structure–performance relationship in electrode materials.Finally,we discuss remaining challenges and suggest new strategies for future research in anion-redox cathode materials for SIBs.