Advancing layered cathode material's cycling stability from uniform doping to non-uniform doping

Uniform doping has been recognized as an effective approach to improve the cycling performance of many layered cathodes. Herein, we propose non-uniform doping as a more effective approach to enhance the cycling stability of layered cathodes via the precipitation strengthening mechanism. In this work, we investigate four doped (Cu, Ti, Mg, and Zn) P2-layered cathodes for sodium ion batteries and validate that cycling induced dopant segregation can substantially enhance the cyclability due to mitigation of bulk cracking. Our comprehensive analysis indicates that dopant evolution is quite diverse during electrochemical cycling, not only depending on the nature of each dopant but also the cycling conditions applied. The migration and segregation behaviors of inactive dopants demonstrate the complex dynamics within grain bulk during battery cycling, which also offers us chances to engineer the physicochemical properties of layered cathodes. Non-uniform doping opens a new avenue for designing battery materials with superior mechanical properties.

[1]  P. Yan,et al.  Dopant Segregation Boosting High‐Voltage Cyclability of Layered Cathode for Sodium Ion Batteries , 2019, Advanced materials.

[2]  Chenglong Zhao,et al.  Ni-based cathode materials for Na-ion batteries , 2019, Nano Research.

[3]  K. Amine,et al.  Injection of oxygen vacancies in the bulk lattice of layered cathodes , 2019, Nature Nanotechnology.

[4]  Brandon R. Sutherland,et al.  Charging up Stationary Energy Storage , 2019, Joule.

[5]  Xiao‐Qing Yang,et al.  Tuning P2-Structured Cathode Material by Na-Site Mg Substitution for Na-Ion Batteries. , 2019, Journal of the American Chemical Society.

[6]  Mihui Park,et al.  Manganese based layered oxides with modulated electronic and thermodynamic properties for sodium ion batteries , 2019, Nature Communications.

[7]  P. Yan,et al.  Phase transition induced cracking plaguing layered cathode for sodium-ion battery , 2018, Nano Energy.

[8]  P. He,et al.  A phase-transition-free cathode for sodium-ion batteries with ultralong cycle life , 2018, Nano Energy.

[9]  Yimin A. Wu,et al.  Approaching the capacity limit of lithium cobalt oxide in lithium ion batteries via lanthanum and aluminium doping , 2018, Nature Energy.

[10]  Zonghai Chen,et al.  Insight into Ca-Substitution Effects on O3-Type NaNi1/3 Fe1/3 Mn1/3 O2 Cathode Materials for Sodium-Ion Batteries Application. , 2018, Small.

[11]  Ya‐Xia Yin,et al.  Na+/vacancy disordering promises high-rate Na-ion batteries , 2018, Science Advances.

[12]  Arumugam Manthiram,et al.  Progress in High‐Voltage Cathode Materials for Rechargeable Sodium‐Ion Batteries , 2018 .

[13]  Jang‐Yeon Hwang,et al.  Sodium-ion batteries: present and future. , 2017, Chemical Society reviews.

[14]  Lei Wang,et al.  Copper-substituted Na0.67Ni0.3−xCuxMn0.7O2 cathode materials for sodium-ion batteries with suppressed P2–O2 phase transition , 2017 .

[15]  Pengjian Zuo,et al.  Unravelling the origin of irreversible capacity loss in NaNiO2 for high voltage sodium ion batteries , 2017 .

[16]  P. Bruce,et al.  Structurally stable Mg-doped P2-Na2/3Mn1−yMgyO2 sodium-ion battery cathodes with high rate performance: insights from electrochemical, NMR and diffraction studies , 2016 .

[17]  K. Kubota,et al.  Sodium and Manganese Stoichiometry of P2-Type Na2/3 MnO2. , 2016, Angewandte Chemie.

[18]  Ya‐Xia Yin,et al.  Suppressing the P2-O2 Phase Transition of Na0.67 Mn0.67 Ni0.33 O2 by Magnesium Substitution for Improved Sodium-Ion Batteries. , 2016, Angewandte Chemie.

[19]  M. J. McDonald,et al.  P2-type Na0.66Ni0.33–xZnxMn0.67O2 as new high-voltage cathode materials for sodium-ion batteries , 2015 .

[20]  P. Bruce,et al.  Review-Manganese-based P2-type transition metal oxides as sodium-ion battery cathode materials , 2015 .

[21]  M. Armand,et al.  Na0.67Mn1−xMgxO2 (0 ≤ x ≤ 0.2): a high capacity cathode for sodium-ion batteries , 2014 .

[22]  Xiqian Yu,et al.  Identifying the Critical Role of Li Substitution in P2− Na x (Li y Ni z Mn 1−y−z )O 2 (0 < x, y, z < 1) Intercalation Cathode Materials for High-Energy Na-Ion Batteries , 2014 .

[23]  C. Delmas,et al.  P2-Na(x)VO2 system as electrodes for batteries and electron-correlated materials. , 2013, Nature materials.

[24]  Hong Li,et al.  Thermodynamic analysis on energy densities of batteries , 2011 .

[25]  C. Delmas,et al.  Reinvestigation of the OP4-(Li/Na)CoO2-layered system and first evidence of the (Li/Na/Na)CoO2 phase with OPP9 oxygen stacking. , 2011, Inorganic Chemistry.

[26]  D Carlier,et al.  Electrochemical investigation of the P2–NaxCoO2 phase diagram. , 2011, Nature materials.

[27]  Zhonghua Lu,et al.  In Situ X-Ray Diffraction Study of P 2 ­ Na2 / 3 [ Ni1 / 3Mn2 / 3 ] O 2 , 2001 .