A5041887267- Graphene research and applications
- Advancements in Battery Materials
- Advanced Battery Materials and Technologies
- Supercapacitor Materials and Fabrication
- 2D Materials and Applications
- GaN-based semiconductor devices and materials
- MXene and MAX Phase Materials
- Ga2O3 and related materials
- Nanowire Synthesis and Applications
- Advanced battery technologies research
- ZnO doping and properties
- Advanced Sensor and Energy Harvesting Materials
- Thermal Radiation and Cooling Technologies
- Graphene and Nanomaterials Applications
- Semiconductor materials and devices
- Nanopore and Nanochannel Transport Studies
- Perovskite Materials and Applications
- Advanced biosensing and bioanalysis techniques
- Molecular Junctions and Nanostructures
- Carbon Nanotubes in Composites
- Nanocluster Synthesis and Applications
- Quantum Dots Synthesis And Properties
- Thermal properties of materials
- Solar-Powered Water Purification Methods
- Carbon and Quantum Dots Applications
Qingdao University of Science and Technology
2021-2024
Soochow University
2019-2022
Beijing Graphene Institute
2019-2022
Peking University
2015-2020
Beijing National Laboratory for Molecular Sciences
2015-2020
State Key Laboratory for Structural Chemistry of Unstable and Stable Species
2016
State Key Laboratory of Rare Earth Materials Chemistry and Application
2015
Electrocatalysts remain vitally important for the rational management of intermediate polysulfides (LiPSs) in realm Li-S batteries. In terms transition-metal-based candidates, situ evolution electrocatalysts course an electrochemical process has been acknowledged; nevertheless, consensus not yet reached on their real functional states as well catalytic mechanisms. Herein, we report all-chemical vapor deposition design defective vanadium diselenide (VSe2)-vertical graphene (VG)...
Witnessing compositional evolution and identifying the catalytically active moiety of electrocatalysts is paramount importance in Li-S chemistry. Nevertheless, this field remains elusive. We report scalable salt-templated synthesis Se-vacancy-incorporated MoSe2 architecture (SeVs-MoSe2 ) reveal phase defective precatalyst working batteries. The interaction between lithium polysulfides SeVs-MoSe2 probed to induce transformation from MoSeS. Furthermore, operando Raman spectroscopy ex situ...
The growth of single-crystal III-nitride films with a low stress and dislocation density is crucial for the semiconductor industry. In particular, AlN-derived deep-ultraviolet light-emitting diodes (DUV-LEDs) have important applications in microelectronic technologies environmental sciences but are still limited by large lattice thermal mismatches between epilayer substrate. Here, quasi-van der Waals epitaxial (QvdWE) high-quality AlN on graphene/sapphire substrates reported their...
Single-crystalline GaN-based light-emitting diodes (LEDs) with high efficiency and long lifetime are the most promising solid-state lighting source compared conventional incandescent fluorescent lamps. However, lattice thermal mismatch between GaN sapphire substrate always induces stress density of dislocations thus degrades performance LEDs. Here, growth high-quality low a on graphene (Gr) buffered is reported for high-brightness blue Gr films directly grown to avoid tedious transfer...
Aluminum (Al) foil, as the most accepted cathode current collector for lithium-ion batteries (LIBs), is susceptible to local anodic corrosions during long-term operations. Such could lead deterioration or even premature failure of and are generally believed be a bottleneck next-generation 5 V LIBs. Here, it demonstrated that Al foil armored by conformal graphene coating exhibits significantly reinforced corrosion resistance in both LiPF6 lithium bis(trifluoromethanesulphonyl) imide (LiTFSI)...
Abstract For III‐nitride‐based devices, such as high‐brightness light‐emitting diodes (LEDs), the poor heat dissipation of sapphire substrate is deleterious to energy efficiency and restricts many their applications. Herein, role vertically oriented graphene (VG) nanowalls a buffer layer for improving in AlN films on substrates studied. It found that VG can effectively enhance between an film longitudinal direction because unique vertical structure good thermal conductivity. Thus, LED...
We study the roles of graphene acting as a buffer layer for growth an AlN film on sapphire substrate. Graphene can reduce density nuclei but increase rate individual nucleus at initial stage. This lead to reduction threading dislocations evolved coalescence boundaries. The interlayer also weakens interaction between and accommodates their large mismatch in lattice thermal expansion coefficients; thus, compressive strain tensile are largely relaxed. effective relaxation further leads low...
Abstract The practical application of lithium–sulfur (Li–S) batteries has been handicapped by the notorious polysulfide shuttling and sluggish sulfur conversion kinetics. Although functional modification separator is readily proposed as an effective strategy to optimize Li–S redox reactions, excessive material dosage invalid structural design still result in inferior electrocatalyst utilization. Herein, generic graphene‐metal selenide heterostructures (Gr‐M x Se y , M = Mo, W, Mn, Cu Zn) are...
Plasma-enhanced chemical vapor deposition (PECVD) is an applicable route to achieve low-temperature growth of graphene, typically shaped like vertical nanowalls. However, for transparent electronic applications, the rich exposed edges and high specific surface area graphene (VG) nanowalls can enhance carrier scattering light absorption, resulting in sheet resistance low transmittance. Thus, synthesis laid-down (LG) imperative. Here, a Faraday cage designed switch PECVD from horizontal...
Abstract Herein, we report label‐free detection of single‐molecule DNA hybridization dynamics with single‐base resolution. By using an electronic circuit based on point‐decorated silicon nanowires as electrical probes, directly record the folding/unfolding process individual hairpin DNAs sufficiently high signal‐to‐noise ratio and bandwidth. These measurements reveal two‐level current oscillations strong temperature dependence, enabling us to determine thermodynamic kinetic properties...
Graphene films, fabricated by chemical vapor deposition (CVD) method, have exhibited superiorities in high crystallinity, thickness controllability, and large-scale uniformity. However, most synthesized graphene films are substrate-dependent, usually fragile for practical application. Herein, a freestanding film is prepared based on the CVD route. By using etchable fabric substrate, papyraceous (FS-GFF) obtained. The electrical conductivity of FS-GFF can be modulated from 50 to 2800 Ω sq-1...
Abstract The direct growth of graphene affording wafer‐scale uniformity on insulators is paramount to electronic and optoelectronic applications; however, it remains a challenge date, because entails an entirely different mode than that over metals. Herein, the metal‐catalyst‐free quasi‐suspended Si wafer demonstrated using interface‐decoupling chemical vapor deposition strategy. employment lower‐than‐conventional H 2 dosage concurrent introduction methanol during can effectively weaken...
Abstract The elimination of wrinkles has become a research hotspot in the realm chemical vapor deposition growth graphene, and there have been reliable routes developed for scenario catalytic synthesis on metals. Nonetheless, transfer‐free graphene over insulating substrates affording ultra‐flatness remains puzzle. Here, authors report direct preparation ultra‐flat an economical quartz glass substrate at wafer level, without any metallic impurities, is reported. Density functional theory...
The copper-foam-assisted PECVD approach harnesses the direct production of flexible graphene glass at relatively low temperatures, which readily serve in and wearable electronic energy applications.
Chemical vapor deposition (CVD) has become a promising approach for the industrial production of graphene films with appealing controllability and uniformity. However, in conventional hot-wall CVD system, CVD-derived suffer from surface contamination originating gas-phase reaction during high-temperature growth. Shown here is that cold-wall system capable suppressing reaction, achieves superclean growth controllable manner. The as-received film, exhibiting improved optical electrical...
At the mesoscopic level of commercial lithium ion battery (LIB), it is widely believed that poor contacts between current collector (CC) and electrode materials (EM) lead to weak adhesions large interfacial electric resistances. However, systematic quantitative analyses influence properties CC are still scarce. Here, we built a model interface by directly growing hierarchical graphene films on Al foil CC, performed studies therein. Our results show resistance dominates, i.e. ∼2 orders...