A5076538479- Advancements in Battery Materials
- Advanced Battery Materials and Technologies
- Advanced battery technologies research
- Supercapacitor Materials and Fabrication
- Advanced Battery Technologies Research
- Transition Metal Oxide Nanomaterials
- Gas Sensing Nanomaterials and Sensors
- Graphene research and applications
- Conducting polymers and applications
- Quantum Dots Synthesis And Properties
- Magnesium Oxide Properties and Applications
- Catalysis and Oxidation Reactions
- Advanced Photocatalysis Techniques
- ZnO doping and properties
- Electrocatalysts for Energy Conversion
- Multiferroics and related materials
- Surface Modification and Superhydrophobicity
- Calcium Carbonate Crystallization and Inhibition
- Electrochemical Analysis and Applications
- Graphene and Nanomaterials Applications
- Copper-based nanomaterials and applications
- Catalytic Processes in Materials Science
- Advanced Nanomaterials in Catalysis
- Layered Double Hydroxides Synthesis and Applications
- Bone Tissue Engineering Materials
Cornell University
2019-2023
Tsinghua University
2010-2023
Stony Brook University
2016-2019
State University of New York
2017
Stony Brook Medicine
2017
Tongji University
2009
Controlling electrode growth Batteries with metal anodes can grow dendrites during cycling, which cause short circuits in a battery or subsequently reduce the charge capacity. Zheng et al. developed process to electrodeposit zinc on graphene-coated stainless-steel electrode, such that forms plates preferential orientation parallel electrode. This is achieved by depositing graphene layer stainless steel designed epitaxially match basal (002) plane of metallic zinc, minimizing lattice strain....
The propensity of metal anodes contemporary interest (e.g., Li, Al, Na, and Zn) to form non-planar, dendritic morphologies during battery charging is a fundamental barrier achievement full reversibility. We experimentally investigate the origins electrodeposition Zn, Cu, Li in three-electrode electrochemical cell bounded at one end by rotating disc electrode. find that classical picture ion depletion-induced growth dendrites valid dilute electrolytes but essentially irrelevant concentrated...
Understanding cation (H+ , Li+ Na+ Al3+ etc.) intercalation/de-intercalation chemistry in transition metal compounds is crucial for the design of cathode materials aqueous electrochemical cells. Here we report that orthorhombic vanadium oxides (V2 O5 ) supports highly reversible proton reactions media, enabling aluminum cells with extended cycle life. Empirical analyses using vibrational and x-ray spectroscopy are complemented theoretical analysis electrostatic potential to establish how why...
Abstract Lithium metal is a promising anode for energy-dense batteries but hindered by poor reversibility caused continuous chemical and electrochemical degradation. Here we find that increasing the Li plating capacity to high values ( e.g ., 10–50 mAh cm −2 ), deposits undergo morphological transition produce dense structures, composed of large grains with dominantly (110) crystallographic facets. The resultant electrodes manifest fast kinetics lithium stripping/plating processes higher...
Control of crystallography metal electrodeposit films has recently emerged as a key to achieving long operating lifetimes in next-generation batteries. It is reported that the large crystallographic heterogeneity, e.g., broad orientational distribution, appears characteristic commercial foils, results rough morphology upon plating/stripping. On this basis, an accumulative roll bonding (ARB) methodology-a severe plastic deformation process-is developed. Zn used first example interrogate...
Aqueous zinc batteries are attracting interest because of their potential for cost-effective and safe electricity storage. However, metallic exhibits only moderate reversibility in aqueous electrolytes. To circumvent this issue, we study Zn able to form nanometric interphases at the metal/liquid electrolyte interface, composed an ion-oligomer complex. In Zn||Zn symmetric cell studies, report highly reversible cycling high current densities capacities (e.g., 160 mA cm-2; 2.6 mAh cm-2). By...
Cu2O@reduced graphene oxide composite displays a good ability to remove dyes from water and high stability in supercapacitors, highlighting potential applications environmental energy storage issues.
Incorporation of reduced graphene oxide into β-Ni(OH)2 presents high performances with specific discharge capacity 283 mA hg−1 after 50 cycles in Ni-MH batteries, and 507 30 Li ion batteries.
Here we reported on the synthesis and characterization of Co3O4 gillyflower-like nanostructures (termed as CGN) with peroxidase-like activity via an L-arginine-assisted hydrothermal approach. The CGN were characterized by a wide range physicochemical techniques. temperature-dependence magnetic measurement (M–T) shows very low Néel temperature (TN) 10.6 K, due to finite-size scaling effect. catalysed reaction peroxidase substrate 3,3′,5,5′-tetramethylbenzidine (TMB) give same colour changes...
Abstract Reversible electrodeposition of metals at liquid‐solid interfaces is a requirement for long cycle life in rechargeable batteries that utilize as anodes. The process has been studied extensively from the perspective electrochemical transformations impact reversibility, however, fundamental challenges associated with maintaining morphological control when intrinsically crystalline solid metal phase emerges an electrolyte solution have less studied, but provide important opportunities...
How surface chemistry influences reactions occurring thereupon has been a long-standing question of broad scientific and technological interest. Here, we consider the relation between at interfaces reversibility electrochemical transformations rechargeable battery electrodes. Using Zn as model system, report that moderate strength chemical interaction deposit substrate-neither too weak nor strong-enables highest stability plating/stripping redox processes. Focused ion beam electron...
Nanostructured electrode materials have been studied extensively with the aim of enhancing lithium ion and electron transport, lowering stress caused by their volume changes during charge/discharge processes electrodes, decreasing overpotential reactions in batteries. In this work, we develop a new synthetic route to high capacity "double-sandwich-like" SnS2-based nanocomposites (i.e., SnS2-reduced graphene oxide, termed as SSG) which can be used an anode material LIBs improved...
Complex Mg(OH)2 nanostructures are synthesized via a biomolecule-assisted hydrothermal route. The as-synthesized dispersed into an acrylonitrile-butadiene-styrene (ABS) copolymer by mechanical kneading, which shows excellent flame-retardant behavior. Also we demonstrated for the first time that complex can find application in self-cleaning its superhydrophobicity with water contact angle over 150° and sliding of 1°.
In this article, we report a scalable one-step synthesis of Ni@reduced graphene oxide (rGO) termed as (NGC) nanocomposites generated via synchronous reduction reaction GO and Ni2+ ions in hydrazine hydrate solution under hydrothermal conditions, which was characterized by transmission electron microscopy, high-resolution Fourier transform infrared, X-ray diffraction, photoelectron spectroscopy M–H measurement. NGC exhibits ferromagnetic behavior with enhanced coercivity comparison bulk...
MgMn2O4 nanoparticles with crystallite sizes of 11 (MMO-1) and 31 nm (MMO-2) were synthesized their magnesium-ion battery-relevant electrochemistry was investigated. MMO-1 delivered an initial capacity 220 mA h g-1 (678 mW g-1). Electrolyte water content had a profound effect on cycle retention.
γ-WO3 hierarchical nanostructures were synthesized by using a biomolecule-assisted hydrothermal approach between Na2WO4·2H2O and glycine acid (HOOC–CH2–NH2) in HCl solution. The phase, structure, morphology of the as-synthesized products characterized X-ray diffraction (XRD), transmission electron microscopy (TEM), high resolution TEM (HRTEM), Fourier transform infrared (FT-IR) spectroscopy, ultraviolet–visible (UV–vis) photoluminescence (PL) spectroscopy. exhibit super-hydrophobicity,...
Abstract Metallic sodium is receiving renewed interest as a battery anode material because the metal earth‐abundant, inexpensive, and offers high specific storage capacity (1166 mAh g −1 at −2.71 V vs standard hydrogen potential). Unlike metallic lithium, case for Na in rechargeable batteries has already been demonstrated on commercial scale high‐temperature Na||S Na||NiCl 2 secondary batteries, which increases interest. The reversibility of room temperature anodes investigated galvanostatic...
Aqueous zinc flow batteries (AZFBs) with high power density and areal capacity are attractive, both in terms of cost safety. A number fundamental challenges associated out-of-plane growth undesirable side reactions on the anode side, as well sluggish reaction kinetics active material loss cathode limit practical deployment these batteries. We investigated artificial interphases created using a simple electrospray methodology strategy for addressing each challenges. The effectiveness full...
Uncontrolled crystal growth during electroreduction of reactive metals in liquid electrolytes produces mossy metal deposits. Here, we use electroanalytical rotating disk electrode (RDE) studies to elucidate the origin moss-like electrodeposition metals. Competing Faradaic reactions on surface are shown be source phenomenon. A regime can accessed by subtle shifts electrolyte chemistry and deposition rate. For Zn─a that conventionally is not known form electrodeposits─obvious patterns emerge...
Photoluminescence blinking behavior from single quantum dots under steady illumination is an important but controversial topic. Its occurrence has impeded the use of in bioimaging. Different mechanisms have been proposed to account for it, although controversial, most which non-radiative Auger recombination mechanism whereby photocharging can lead phenomenon. Here, singly charged trion, maintains photon emission, including radiative and recombination, leads fluorescence non-blinking observed...
We report here for the first time hollow, metastable, single-crystal, rhombohedral In2O3 (rh-In2O3) nanocrystals synthesized by annealing solvothermally prepared InOOH solid under ambient pressure at 400 °C, through a mechanism of Kirkendall effect, in which pore formation is attributed to difference diffusion rates anions (OH– and O2–) couple. The were via controlled hydrolysis solvothermal route using In(NO3)3·4.5H2O as starting material glycerol–ethanol mixed solvent. solvent plays key...
Significance Spatial variations in chemical composition and transport properties of the material phases (interphases) formed on reactive metals liquid electrolytes are thought to be responsible for propensity metal battery electrodes electrodeposit irregular, nonplanar morphologies. Equilibrium theoretical calculations using joint density functional analysis vacuum generic media indicate that in-plane at such interphases is enhanced substantially if LiX (X = Br > Cl F) species...
Abstract As a promising pathway toward low‐cost, long‐duration energy storage, rechargeable sodium batteries are of increasing interest. Batteries that incorporate metallic as anode promise high theoretical specific capacity 1166 mAh g −1 , and low reduction potential −2.71 V. The reactivity poor electrochemical reversibility anodes render metal (SMA) cells among the most challenging for practical implementation. Here, failure mechanisms Na investigated authors report loss morphological...