A5055117267- Advancements in Battery Materials
- Advanced Battery Materials and Technologies
- Supercapacitor Materials and Fabrication
- Extraction and Separation Processes
- Advanced Battery Technologies Research
- Semiconductor materials and devices
- Ferroelectric and Piezoelectric Materials
- Inorganic Chemistry and Materials
- Transition Metal Oxide Nanomaterials
- Advanced battery technologies research
Xi'an Jiaotong University
2022-2024
Sehenstar Energy Technology (China)
2024
Beijing University of Chemical Technology
2021-2023
Zero to Three
2022
State Key Laboratory of Electrical Insulation and Power Equipment
2022
Chinese Academy of Sciences
2022
Institute of Chemistry
2022
Abstract Layered transition metal oxide P2‐Na 2/3 Ni 1/3 Mn O 2 usually suffers from large‐volume phase transitions and different Na‐vacancy ordering during sodium (de)intercalation, incurring rapid capacity decline poor rate capability. Herein, an effective strategy based on synergetic effect of selected multiple ions is designed for P2‐type cathodes with improved performance. The role tetravalent titanium provides high redox potential, inactive divalent magnesium stabilizes the structure,...
Layered oxide cathodes usually exhibit high compositional diversity, thus providing controllable electrochemical performance for Na-ion batteries. These abundant components lead to complicated structural chemistry, closely affecting the stacking preference, phase transition and Na+ kinetics. With this perspective, we explore thermodynamically stable diagram of various P2/O3 composites based on a rational biphasic tailoring strategy. Then specific composite is investigated compared with its...
O3-type layered oxides with high initial sodium content are promising cathode candidates for Na-ion batteries. However, affected by the undesired transition metal slab sliding and reaction H2O/CO2, their further application is typically hindered unsatisfactory cycling stability upon charging to voltage poor storage under humid air. Herein, we demonstrate a Fe/Ti cosubstitution strategy simultaneously enhance electrochemical performance of pristine O3-NaNi0.5Mn0.5O2 material, via employing...
Abstract O3‐type layered transition metal cathodes are promising energy storage materials due to their sufficient sodium reservoir. However, sluggish ions kinetics and large voltage hysteresis, which generally associated with Na + diffusion properties electrochemical phase reversibility, drastically minimize density, reduce efficiency, hinder further commercialization of sodium‐ion batteries (SIBs). Here, this work proposes a high‐entropy tailoring strategy through manipulating the...
In spite of the competitive performance at room temperature, development sodium-ion batteries (SIBs) is still hindered by sluggish electrochemical reaction kinetics and unstable electrode/electrolyte interphase under subzero environments. Herein, a low-concentration electrolyte, consisting 0.5M NaPF
Sodium-ion batteries (SIBs) have captured widespread attention for grid-scale energy storage owing to the wide distribution and low cost of sodium resources. Delivery high density with stable retention remains a challenge in developing cathode candidates rechargeable SIBs. Inspired by concept "cationic potential", here, we present hierarchical crystalline domain hexagonal particles target chemical composition (Na
Abstract Layered composite oxide materials with O3/P2 biphasic crystallographic structure typically demonstrate a combination of high capacities the O3 phase and operation voltages P2 phase. However, their practical applications are seriously obstructed by difficulties in thermodynamic regulation, complicated electrochemical transition, unsatisfactory cycling life. Herein, we propose an efficient structural evolution strategy from biphase to monophase Na 0.766+ x Li Ni 0.33− Mn 0.5 Fe 0.1 Ti...
Searching for high energy-density electrode materials sodium ion batteries has revealed Na-deficient intercalation compounds with lattice oxygen redox as promising high-capacity cathodes. However, anionic reactions commonly encountered poor electrochemical reversibility and unfavorable structural transformations during dynamic (de)sodiation processes. To address this issue, we employed lithium orbital hybridization chemistry to create Na-O-Li configuration in a prototype P2-layered Na
Fe/Mg co-doped O3-NaNi<sub>0.35</sub>Fe<sub>0.2</sub>Mg<sub>0.05</sub>Mn<sub>0.4</sub>O<sub>2</sub> was prepared as a cathode material for SIBs, and it delivered decent electrochemical performance the half full SIBs due to its suppressed complex monoclinic phase transition.
O3-NaNi0.25Fe0.5Mn0.25O2 layered oxide is considered one of the most promising cathode candidates for sodium-ion batteries because its advantages, such as large capacity and low cost. However, practical application this material limited by poor cyclic stability insufficient rate capability. Here, a strategy to substitute Fe3+ in NaNi0.25Fe0.5Mn0.25O2 with Al3+ adopted address these issues. The substitution enhances framework phase transition reversibility parent forming stronger TM–O bond,...
Abstract Layered oxide cathodes usually exhibit high compositional diversity, thus providing controllable electrochemical performance for Na‐ion batteries. These abundant components lead to complicated structural chemistry, closely affecting the stacking preference, phase transition and Na + kinetics. With this perspective, we explore thermodynamically stable diagram of various P2/O3 composites based on a rational biphasic tailoring strategy. Then specific composite is investigated compared...
O3-type sodium-layered oxides (such as antimony-based O3 structures) have been suggested one of the most fascinating cathode materials for sodium-ion batteries (SIBs). Honeycomb-ordered structures, however, unsatisfactorily exhibit complex phase transitions and sluggish Na+ kinetics during cycling. Herein, we prepared a completely cationic-disordered Na0.8Ni0.6Sb0.4O2 compound by composition regulation SIBs. Surprisingly, measured redox potentials typical O3–P3 transition are located at 3.4...
Fierce phase transformation and limited sodium ion diffusion dynamics are critical obstacles that hinder the practical energy storage applications of P2-type layered transition metal oxides (NaxTMO2). Herein, a synergistic strategy electronic state tailoring pillar effect was carefully implemented by substituting divalent Mg2+ into Na0.67Ni0.33Mn0.67O2 material with unique oriented hollow rodlike structures. Mg2+substitution can not only facilitate anionic oxygen redox reactions conductivity...
Transition-metal layered oxides (such as P2-Na2/3Ni1/3Mn2/3O2) are suggested one type of the most potential cathode candidates for sodium ion batteries (SIBs) owing to their high capacity and low cost; however, they suffer from structural damage sluggish Na+ kinetics resulting undesirable phase transformation P2−O2 Na+/vacancy ordering, respectively. Herein, a Mg/Ti co-doped P2-Na0.67Ni0.28Mg0.05Mn0.62Ti0.05O2 oxide is demonstrated high-efficiency material SIBs. The delivers reversible 135.5...
Sodium-ion batteries (SIBs) are currently the most promising candidates for large-scale energy storage devices owing to their low cost and abundant resources. Titanium-based layered oxides have attracted widespread attention as anode materials due delivering a safe potential of about 0.7 V (vs Na+/Na) small volume contraction during cycles; P2-type Ti-based typically reported, challenging synthesis O3-type counterpart resulting from high percentage unstable Ti3+. Herein, we report an...
Abstract In spite of the competitive performance at room temperature, development sodium‐ion batteries (SIBs) is still hindered by sluggish electrochemical reaction kinetics and unstable electrode/electrolyte interphase under subzero environments. Herein, a low‐concentration electrolyte, consisting 0.5M NaPF 6 dissolving in diethylene glycol dimethyl ether solvent, proposed for SIBs working low temperature. Such an electrolyte generates thin, amorphous, homogeneous cathode/electrolyte The...
Sodium-ion batteries (SIBs) operating under high-voltages suffer from unstable cathode-electrolyte interphase (CEI) formed on the cathode surface, resulting in continuous electrolyte decomposition, surface reconstruction, transition metal dissolution, and eventually capacity decay. Therefore, designing high-voltage constructing robust CEI are critical for high-energy SIBs. Herein, a localized high-concentration (LHCE) is fabricated by dissolving sodium hexafluorophosphate methyl ethyl...