A5014141174- Advancements in Battery Materials
- Advanced Battery Materials and Technologies
- Supercapacitor Materials and Fabrication
- Electrocatalysts for Energy Conversion
- Advanced Battery Technologies Research
- Fuel Cells and Related Materials
- Advanced battery technologies research
- Semiconductor materials and devices
- MXene and MAX Phase Materials
- Ammonia Synthesis and Nitrogen Reduction
- Ferroelectric and Negative Capacitance Devices
- Catalysis and Hydrodesulfurization Studies
- Advanced materials and composites
- Perovskite Materials and Applications
- Extraction and Separation Processes
- Dielectric properties of ceramics
- Advanced Photocatalysis Techniques
- Electrochemical Analysis and Applications
- Layered Double Hydroxides Synthesis and Applications
- Advanced ceramic materials synthesis
- 2D Materials and Applications
- Chalcogenide Semiconductor Thin Films
Tan Kah Kee Innovation Laboratory
2023-2024
Collaborative Innovation Center of Chemistry for Energy Materials
2023-2024
Xiamen University
2023-2024
Soochow University
2016-2022
Suzhou Research Institute
2019
The activity and accessibility of MoS2 edge sites are critical to deliver high hydrogen evolution reaction (HER) efficiency. Here, a porous carbon network confining ultrasmall N-doped nanocrystals (N-MoS2/CN) is fabricated by self-templating strategy, which realizes synergistically structural electronic modulations edges. Experiments density functional theory calculations demonstrate that the N dopants could activate edges for HER, while active from N-MoS2 nanocrystals. Consequently,...
Zinc (Zn) metal anodes suffer from the dendrite growth and hydrogen evolution reaction (HER) in classical aqueous electrolytes, which severely limit their lifespan. We propose a rational design of AgxZny protective coatings with selective binding to Zn2+ against H+ simultaneously regulate Zn pattern HER kinetics. further demonstrate that by tuning composition coating deposition behavior can be readily tuned conventional plating/stripping (on Zn-AgZn3 coating) alloying/dealloying Ag-AgZn...
The working mechanism of LiCoO2 beyond 4.6 V presents complicated issues: (1) the ambiguous multistructural evolutions, (2) vague O-related anionic redox reactions (ARR) triggered by overlap Co–O bands, and (3) serious electrode–electrolyte interface stability challenges. intricate relationship among them turns into a classic "chicken egg" conundrum, leading to confusing evolution process LiCoO2. Herein, from an ingenious perspective combining stacking faults nonhomogeneous delithiation, we...
Abstract High‐performance and affordable electrocatalysts from earth‐abundant elements are desirably pursued for water splitting involving hydrogen evolution reaction (HER) oxygen (OER). Here, a bifunctional electrocatalyst of highly crystalline Mo 2 C nanoparticles supported on carbon sheets (Mo C/CS) was designed toward overall splitting. Owing to the active catalytic nature nanoparticles, high surface area efficient charge transfer in strongly coupled composite, catalysts show excellent...
A novel high-voltage cathode material Na<sub>6</sub>Fe<sub>5</sub>(SO<sub>4</sub>)<sub>8</sub> (NFS) is successfully prepared for sodium-ion batteries the first time. It found that NFS shows a high working voltage of 3.7 V, together with an attractive energy density approaching 450 W h kg<sup>−1</sup>. And, based on NFS@5%CNTs and hard carbon (HC) anode, full NFS@5%CNTs//HC cell can deliver impressive 350 kg<sup>−1</sup> excellent cycling stability over 1000 cycles at 2C.
Potassium ion hybrid capacitors (KICs) have drawn tremendous attention for large-scale energy storage applications because of their high and power densities the abundance potassium sources. However, achieving KICs with capacity long lifespan remains challenging large size ions causes sluggish kinetics fast structural pulverization electrodes. Here, we report a composite anode VO2–V2O5 nanoheterostructures captured by 3D N-doped carbon network (VO2–V2O5/NC) that exhibits reversible 252 mAh...
Anode-free lithium metal batteries (AF-LMBs) can deliver the maximum energy density. However, achieving AF-LMBs with a long lifespan remains challenging because of poor reversibility Li+ plating/stripping on anode. Here, coupled fluorine-containing electrolyte, we introduce cathode pre-lithiation strategy to extend AF-LMBs. The AF-LMB is constructed Li-rich Li2Ni0.5Mn1.5O4 cathodes as Li-ion extender; large amount in initial charging process offset continuous consumption, which benefits...
Abstract Raising the charging cut‐off voltage of layered oxide cathodes can improve their energy density. However, it inevitably introduces instabilities regarding both bulk structure and surface/interface. Herein, exploiting unique characteristics high‐valence Nb 5+ element, a synchronous surface‐to‐bulk‐modified LiCoO 2 featuring Li 3 NbO 4 surface coating layer, Nb‐doped bulk, desired concentration gradient architecture through one‐step calcination is achieved. Such multifunctional...
Replacement of expensive and rare platinum with metal-nitrogen-carbon catalysts for oxygen reduction reactions in proton exchange membrane fuel cells is hindered by their inferior activity. Herein, we report a highly active iron-nitrogen-carbon catalyst optimizing the carbon structure coordination environments Fe-N
Abstract Although 2D Ti 3 C 2 T x is a good candidate for supercapacitors, the restacking of nanosheets hinders ion transport significantly at high scan rates, especially under practical mass loading (>10 mg cm −2 ) and thickness (tens microns). Here, ‐NbN hybrid film designed by self‐assembling with arrays NbN nanocrystals. Working as an interlayer spacer , facilitates penetration through its porous structure; even extremely rates. The shows thickness‐independent rate performance (almost...
A Mn-rich shell with desired structural conformality improves the high-voltage cycling stability of Ni-rich core cathode materials.
Abstract Compensating the irreversible loss of limited active lithium (Li) is essentially important for improving energy‐density and cycle‐life practical Li‐ion battery full‐cell, especially after employing high‐capacity but low initial coulombic efficiency anode candidates. Introducing prelithiation agent can provide additional Li source such compensation. Herein, we precisely implant trace Co (extracted from transition metal oxide) into site 2 O, obtaining (Li 0.66 0.11 □ 0.23 ) O (CLO)...
Abstract The intrinsic poor structural and thermal stability of high‐voltage layered cathodes are aggravated as the charging depth increases, which severely threatens cycle life safety battery. Herein, without modifying cathode itself, a simple economic blending strategy is introduced, an olivine‐LiCoO 2 blended featuring superior comprehensive performance (energy, power, cycle‐life, safety) at 4.65 V fabricated. strong bonding affinity olivine/LiCoO contact interface suppresses lattice O...
Compensating for the irreversible loss of limited active sodium (Na) is crucial enhancing energy density practical sodium-ion batteries (SIBs) full-cell, especially when employing hard carbon anode with initially lower coulombic efficiency. Introducing sacrificial cathode presodiation agents, particularly those that own potential anionic oxidation activity a high theoretical capacity, can provide additional sources compensating Na loss. Herein, Ni atoms are precisely implanted at sites within
Abstract Smart integration of transition‐metal sulfides/oxides/nitrides with the conductive MXene to form hybrid materials is very promising in development high‐performance anodes for next‐generation Li‐ion batteries (LIBs) owing their advantages high specific capacity, favorable Li + intercalation structure, and superior conductivity. Herein, a facile route was proposed prepare strongly coupled MoS 2 nanocrystal/Ti 3 C nanosheet hybrids through freeze‐drying combined subsequent thermal...
Abstract Developing sacrificial cathode prelithiation technology to compensate for active lithium loss is vital improving the energy density of lithium‐ion battery full‐cells. Li 2 CO 3 owns high theoretical specific capacity, superior air stability, but poor conductivity as an insulator, acting a promising challenging agent candidate. Herein, extracting trace amount Co from LiCoO (LCO), lattice engineering developed through substituting sites with and inducing defects obtain composite...
After charging to a high state-of-charge (SoC), layered oxide cathodes exhibit capacities but suffer from gliding-induced structural distortions caused by deep Li depletion within alkali metal (AM) layers, especially for high-nickel candidates. In this study, we identify the essential structure of detrimental H3 phase formed at SoC be an intergrowth characterized random sequences O3 and O1 slabs, where slabs represent Li-rich layers denote Li-depleted (or empty) that glide slabs. Moreover,...
Abstract The high‐voltage induced undesirable surface passivation bilayer (cathode/electrolyte interface and cation‐densified phase) of LiCoO 2 inevitably leads to battery degradation. Herein, a continual/uniform enamel‐like olivine layer on is fabricated by employing high‐speed mechanical fusion method . suppresses interfacial side reactions tuning EC dehydrogenation, contributing an ultrathin stable cathode/electrolyte interface. strong bonding affinity between restrains both lattice...
Benefiting from the highly reversible structural evolution of pre-lithiated Li-rich Li 2 Mn O 4 cathode, corresponding anode-free coin cell delivers a considerable 94.4% capacity retention after 40 cycles.
Both LiFePO4 (LFP) and NaFePO4 (NFP) are phosphate polyanion-type cathode materials, which have received much attention due to their low cost high theoretical capacity. Substitution of manganese (Mn) elements for LFP/NFP materials can improve the electrochemical properties, but connection between local structural changes behaviors after Mn substitution is still not clear. This study only achieves improvements in energy density LFP cyclic stability NFP through substitution, also provides an...
Abstract Anode‐free sodium metal batteries (AFSMBs) are regarded as the “ceiling” for current sodium‐based batteries. However, their practical application is hindered by unstable electrolyte and interfacial chemistry at high‐voltage cathode anode‐free side, especially under extreme temperature conditions. Here, an advanced design strategy based on solvation engineering presented, which shapes a weakly solvating anion‐stabilized (WSAS) balancing interaction between Na + ‐solvent ‐anion. The...
A surfactant-free sonication-induced route is developed to facilely prepare colloidal nanocrystals of Li-excess layered Li1.2Mn0.54Ni0.13Co0.13O2 (marked as LMNCO) material. The sonication process plays a critical role in forming LMNCO ethanol (ethanol molecules marked EtOHs) and inducing the interaction between solvent molecules. formation mechanism LMNCO–EtOH supramolecules dispersion system proposed examined by theoretical simulation light scattering technique. It suggested that as-formed...