A5102780296- Advancements in Battery Materials
- Advanced Battery Materials and Technologies
- Advanced battery technologies research
- Spectroscopy and Quantum Chemical Studies
- Conducting polymers and applications
- Electrochemical Analysis and Applications
- Advanced Sensor and Energy Harvesting Materials
- Electrocatalysts for Energy Conversion
- Advanced Battery Technologies Research
- Photochemistry and Electron Transfer Studies
- MXene and MAX Phase Materials
- Ferroelectric and Piezoelectric Materials
- Coleoptera: Cerambycidae studies
- Supercapacitor Materials and Fabrication
- Coleoptera Taxonomy and Distribution
- 2D Materials and Applications
- Surface and Thin Film Phenomena
- Molecular Junctions and Nanostructures
- Magnetic properties of thin films
- Lipid Membrane Structure and Behavior
- Scarabaeidae Beetle Taxonomy and Biogeography
- Perovskite Materials and Applications
- Dielectric materials and actuators
- Semiconductor materials and interfaces
- Chemical and Physical Properties in Aqueous Solutions
Shanghai Institute of Ceramics
2017-2024
Chinese Academy of Sciences
2014-2024
Hebei University
2012-2024
University of Chinese Academy of Sciences
2015-2023
China University of Geosciences
2023
Beijing Institute of Technology
2022
Dingxi City People's Hospital
2021
State Key Laboratory of High Performance Ceramics and Superfine Microstructure
2018
Taiyuan University of Technology
2017-2018
Shanghai Institute of Technical Physics
2013-2017
Surface second harmonic generation was used to probe the silica/water interface. At pH values where silica surface is charged, we found that water molecules near interface are polarized by interfacial electric field and responsible for observed light. Two types of silanol sites having pKa 4.5 8.5 were inferred from data. A promising result studies development a new method obtaining potentials at charged liquid interfaces.
Abstract Energy storage technologies, such as fuel cells, ammonia production and lithium–air batteries, are important strategies for addressing the global challenge of energy crisis environmental pollution. Taking overpotential a direct criterion, we illustrate in theory experiment that adsorption energies charged species Li++e− H++e− central parameter to describe catalytic activities related electricity-in/electricity-out efficiencies. The essence activity is revealed relate with electronic...
Abstract As the core component of solid-state batteries, neither current inorganic electrolytes nor solid polymer can simultaneously possess satisfactory ionic conductivity, electrode compatibility and processability. By incorporating efficient Li + diffusion channels found in polar functional groups present electrolytes, it is conceivable to design inorganic-organic hybrid achieve true fusion synergy performance. Herein, we demonstrate that traditional metal coordination compounds serve as...
Abstract Organic electronics is emerging for large-area applications such as photovoltaic cells, rollable displays or electronic paper. Its future development and integration will require a simple, low-power organic memory, that can be written, erased readout electrically. Here we demonstrate non-volatile memory in which the ferroelectric polarisation state of an tunnel barrier encodes stored information sets current. We use high-sensitivity piezoresponse force microscopy to show films thin...
A new method to determine the pKa of chemical species at aqueous insulating interfaces is based on discovery that interface potential linearly proportional measured second harmonic electric field. The proportionality constant effective third-order susceptibility and same for all studied, which has its origin in polarization bulk water induced by charged form acid or base interface. We have determined CH3(CH2)21NH+3 air/water a 9.9±0.2 versus 10.6 water.
We have used second harmonic generation to directly observe chemical changes in a lipid monolayer. observed that pKa of p-hexadecyl aniline at the air/water interface is 3.6 ± 0.2 versus 5.3 0.1 bulk. This fiftyfold increase acidity due higher free energy charged species interface, which favors shift equilibrium towards neutral form.
Classical organic anode materials for Na-ion batteries are mostly based on conjugated carboxylate compounds, which can stabilize added electrons by the double-bond reformation mechanism. Now, 1,4-cyclohexanedicarboxylic acid (C8 H12 O4 , CHDA) with a non-conjugated ring (-C6 H10 -) connected carboxylates is shown to undergo electrochemical reactions two Na ions, delivering high charge specific capacity of 284 mA h g-1 (249 after 100 cycles), and good rate performance. First-principles...
Two-dimensional transition metal (TM) disulfides have emerged as promising nonprecision catalysts for hydrogen evolution reactions (HERs) because they exhibited tunable electrocatalytic activity at different sites. However, the design of efficient catalytic sites is still limited to trial-and-error stage, largely due lack rational principles. Here, we present a universal principle evaluate HER various MoS2 structures such TM-substitute, S-vacancy, Mo-edge, and S-edge, based on...
The electronic-structure evolutions of few-layer black phosphorus (BP) under pressure shows a wealth phenomena, such as the nonmonotonic change direct gap at <a:math xmlns:a="http://www.w3.org/1998/Math/MathML"><a:mi mathvariant="normal">Γ</a:mi></a:math> point, layer-number dependence, and distinct responses to normal hydrostatic pressures. A full unified understanding these rich phenomena remains lacking. Here, we provide from competition between quasibonding (QB) interactions chemical...
Abstract Lithium‐ion batteries (LIBs) built on inorganic anodes have achieved great commercial success. By contrast, the practical application of organic anode materials encounters key bottlenecks including electronic insulation, high solubility, and poor initial coulombic efficiency (ICE). Among them, improving ICEs (normally 30–60%) faces enormous challenges in both theory technology, there has been no substantial breakthrough yet. Herein, a wet chemical pretreatment technology to increase...
We demonstrate that the surface potential of charged liposomes can be determined by second harmonic generation. The Gouy−Chapman model is used to describe electric double layer. From experimental data, we obtained charge density and consisting negatively phospholipid dioleoylphosphatidylglycerol. was found in range 20−100 mV depending on concentration valence electrolyte (NaCl or MgSO4) solution. ∼1.3 × 1014 per cm2, corresponding ∼70 Å2/charge, which comparable area headgroup.4
The strategy of band alignment is proposed to reduce the charge overpotential Li–O<sub>2</sub>batteries and screen high-activity cathodes.
Organic electrode materials have shown extraordinary promise for green and sustainable electrochemical energy storage devices, but usually suffer from low specific capacity poor rate capability, which is largely caused by inactive components diffusion-controlled Li+ intercalation. Herein, high-rate intercalation pseudocapacitance in organic molecular crystals achieved through introducing weak secondary bonding channels, far exceeding their theoretical based on redox chemistry at functional...
It is usually supposed that only low-symmetry two-dimensional (2D) materials exhibit anisotropy, here we show high-symmetry 2D semiconductors can significant anisotropy in momentum space due to the band structure k-space. The basic reason different k-points Brillouin zone have symmetry. Using semiconductor WSe$_2$ as example, construct lateral heterostructures with zigzag and armchair connections metal NbSe$_2$, electronic contact characteristics of these two are analyzed. found both p-type...
Abstract Achieving significant enhancements in both capacity and voltage stability remains a formidable challenge for Li‐rich layered cathodes. The severe performance degradation is attributed to large lattice strain, irreversible oxygen release transition metal migration, but the most critical factor responsible structural destabilization still elusive. Here, based on density functional theory calculations, machine learning experimental validation, multi‐hierarchy screening of complex...
This review has been made an attempt to seek some observed descriptors comprehensively optimize structural stability and catalytic activity of single-atom catalysts. Electronic structure analysis can reveal the underlying mechanisms atomic phy-chemical properties local coordination structures on binding strength. The free electrons around Fermi level play important role determine strength, which be further influenced by electronegativity difference between single atom nearby support atoms....
Momentum-matched type II van der Waals heterostructures (vdWHs) have been designed by assembling layered two-dimensional semiconductors (2DSs) with special band-structure combinations - that is, the valence band edge at Gamma point (the Brillouin-zone center) for one 2DS and conduction other [Ubrig et al., Nat. Mater. 19, 299 (2020)]. However, offset sizes, band-alignment types, whether momentum matched or not, all are affected interfacial effects between component 2DSs, such as...
Organosilane self-assembled monolayer (SAM) formation from solution on fused silica surfaces has been studied through the surface silanol group chemical reaction. The method is based second-harmonic generation (SHG) efficiency as a function of pH. Direct experimental support provided for following organosilane SAM structure at surface: (1) does not have any preference toward different sites; (2) during process surface, most functional groups remain intact and therefore maintain their...
A CuTCNQ electrode is immobilized with a graphene oxide modified separator through π–π interaction between sp<sup>2</sup>-C and soluble aromatic active molecules.
The surface density and electrolyte concentration dependences of the pKa CH3(CH2)21NH3+ at air/water interface are obtained using method second harmonic generation. If it is assumed that amphiphiles uniformly distributed interface, application Gouy−Chapman model yields values ranging from 10.2 to 8.2 as varies 100 22 Å2/molecule. By accounting for inhomogeneity i.e., there islands "liquid phase" immersed in a "gas very low-density amphiphiles, single 10.1 ± 0.2 all densities. acidity long...