A5075057187- Advanced Battery Materials and Technologies
- Advancements in Battery Materials
- Advanced battery technologies research
- Advanced Battery Technologies Research
- Supercapacitor Materials and Fabrication
- Gold and Silver Nanoparticles Synthesis and Applications
- Electrocatalysts for Energy Conversion
- Fuel Cells and Related Materials
- Surface Modification and Superhydrophobicity
- Conducting polymers and applications
- Electrochemical Analysis and Applications
- Magnetic properties of thin films
- Advanced Sensor and Energy Harvesting Materials
- Spectroscopy and Quantum Chemical Studies
- Civil and Geotechnical Engineering Research
- Advanced NMR Techniques and Applications
- Metal and Thin Film Mechanics
- Synthesis and properties of polymers
- Spectroscopy Techniques in Biomedical and Chemical Research
- Extraction and Separation Processes
- Molecular Junctions and Nanostructures
- Semiconductor materials and devices
- Geotechnical Engineering and Soil Stabilization
- Nanofabrication and Lithography Techniques
- Analytical Chemistry and Sensors
Oak Ridge National Laboratory
2018-2025
Shenyang Aerospace University
2005-2025
Suzhou Institute of Nano-tech and Nano-bionics
2022-2025
Chinese Academy of Sciences
2022-2025
Chinese People's Liberation Army
2025
North China Electric Power University
2024-2025
University of Tennessee at Knoxville
2024
Dalian Medical University
2024
Government of the United States of America
2024
Tsinghua University
2002-2023
Fluoroethylene carbonate (FEC) has been proposed as an effective electrolyte additive that enhances the stability and elasticity of solid interphase (SEI) emerging Si Li metal anodes. However, uncertainties still remain on exact mechanism through which FEC alters decomposition SEI formation process. Herein, influence LiPF6/ethylene (EC) electrolytes for anodes is investigated classical molecular dynamics, Fourier-transform infrared spectroscopy, quantum chemical calculations. Albeit a...
Abstract Single‐atom catalysts (SACs) have become the forefront of energy conversion studies, but unfortunately, origin their activity and interpretation synchrotron spectrograms these materials remain ambiguous. Here, systematic density functional theory computations reveal that edge sites—zigzag armchair—are responsible for graphene‐based Co (cobalt) SACs toward hydrogen evolution reaction (HER). Then, edge‐rich (E)‐Co single atoms (SAs) were rationally synthesized guided by theoretical...
Uncontrolled zinc electrodeposition is an obstacle to long-cycling batteries. Much has been researched on regulating electrodeposition, but rarely are the studies performed in presence of a separator, as practical cells. Here, we show that microstructure separators determines behavior zinc. Porous direct deposit into their pores and leave "dead zinc" upon stripping. In contrast, nonporous separator prevents penetration. Such difference between two types distinguished only if caution taken...
Silicon (Si) is the most naturally abundant element possessing 10-fold greater theoretical capacity compared to that of graphite-based anodes. The practicality implementing Si anodes is, however, limited by unstable solid/electrolyte interphase (SEI) and anode fracturing during continuous lithiation/delithiation. We demonstrate glyme-based electrolytes (GlyEls) ensure a conformal SEI on keep "fracture-free". Benchmarking against optimal, commonly used carbonate electrolyte with...
Electropolishing is the electrochemical process to remove metallic material from workpiece, in order obtain a smoother metal surface. It has found vast engineering applications many fields, such as food, medical, pharmaceutical and semiconductor industries. This review aimed provide readership with insightful understanding of electropolishing process, fundamental aspects well application aspects. The general electropolishing, including its definition, classic setup, fundamentals behind it...
Although several principles have been recognized to fabricate a nominal "better" binder, there continues be lack of rational design and synthesis approach that would meet the robust criteria required for silicon (Si) anodes. Herein, we report synthetic polymer i.e., catechol-functionalized chitosan cross-linked by glutaraldehyde (CS-CG+GA), serves dual functionalities: (a) wetness-resistant adhesion capability via catechol grafting (b) mechanical robustness in situ formation...
Lithium phosphorus oxynitride, also known as Lipon, solid-state electrolytes are at the center of search for Li metal batteries. Key to performance Lipon is a combination high content, amorphous character, and incorporation N into structure. Despite material’s importance, our work presents first study fully resolve structure using ab initio molecular dynamics, density functional theory, neutron scattering, infrared spectroscopy. The modeled experimental results have exceptional agreement in...
Performance of portable technologies from mobile phones to electric vehicles is currently limited by the energy density and lifetime lithium batteries. Expanding limits battery technology requires in situ detection trace components at electrode-electrolyte interphases. Surface-enhance Raman spectroscopy could satisfy this need if a robust reproducible substrate were available. Gold nanoparticles (Au NPs) larger than 20 nm diameter are expected greatly enhance intensity they can be assembled...
Abstract Transition metal oxides (TMOs)‐based anode materials of high theoretical capacities have been intensively studied for lithium‐ion storage. However, their poor high‐rate capability and cycling stability remain to be effectively resolved. Herein, a novel ion exchange (IE)‐assisted indirect carbon coating strategy is proposed realize performance freestanding TMO‐based anodes flexible batteries (FLIBs). This approach avoids the possible side reaction oxide reduction, enhances degrees...
Understanding the fundamental factors that drive ion solvation structure and transport is key to design high-performance, stable battery electrolytes. Reversible desolvation are critical interfacial charge-transfer process across solid–liquid interface as well resulting stability of solid electrolyte interphase. Herein, we report study Li+ salt in aprotic solution immediate vicinity (∼20 nm) electrode–liquid using surface-enhanced Raman spectroscopy (SERS) from a gold nanoparticle (Au NP)...
Abstract Nanoporous TiNb 2 O 7 (NPTNO) material is synthesized by a sol–gel method with an ionic liquid (IL) as the nanoporous structure directing template. NPTNO exhibits high reversible capacity of 210 mAh g –1 even at charging rate 50 C and excellent cyclability half‐cell retention 74% for 1000 cycles 5 LiNi 0.5 Mn 1.5 4 ‐coupled full‐cell retentions 81% 87% 1 C, respectively. The studies cycled electrode illustrate that IL‐directed mesoporous can enhance cells due to alleviation...
This is the first report of molybdenum carbide-based electrocatalyst for sulfur-based sodium-metal batteries. MoC/Mo2 C in situ grown on nitrogen-doped carbon nanotubes parallel with formation extensive nanoporosity. Sulfur impregnation (50 wt% S) results unique triphasic architecture termed carbide-porous host (MoC/Mo2 C@PCNT-S). Quasi-solid-state phase transformation to Na2 S promoted carbonate electrolyte, time-resolved Raman, X-ray photoelectron spectroscopy, and optical analyses...
Abstract Thin intermetallic Li 2 Te–LiTe 3 bilayer (0.75 µm) derived from 2D tellurene stabilizes the solid electrolyte interphase (SEI) of lithium metal and argyrodite (LPSCl, 6 PS 5 Cl) solid‐state (SSE). Tellurene is loaded onto a standard battery separator reacted with through single‐pass mechanical rolling, or transferred directly to SSE surface by pressing. State‐of‐the‐art electrochemical performance achieved, e.g., symmetric cell stable for 300 cycles (1800 h) at 1 mA cm −2 mAh (25%...
This study advances the development of flexible, sheet-type sulfide solid-state electrolytes (SSEs) for use in all-solid-state batteries, emphasizing important and previously insufficiently investigated role polymer binder entanglement. The molecular weight binders is pivotal crafting robust, freestanding SSE films. Our research uncovers a dual impact: higher bolster structural integrity films but elevate grain boundary resistance diminish critical current density, whereas lower...
Abstract Microstructure of argyrodite solid‐state electrolyte (SSE) critically affects lithium metal electrodeposition/dissolution. While the stability unmodified SSE is mediocre, once optimized state‐of‐the‐art electrochemical performance achieved (symmetric cells, full cells with NMC811) without secondary interlayers or functionalized current collectors. Planetary mechanical milling in wet media (m‐xylene) employed to alter commercial Li 6 PS 5 Cl (LPSCl) powder. Quantitative stereology...
Magnesium batteries offer a safer alternative for next-generation battery technology due to their insusceptibility dendrite deposition. Selective membranes tailored magnesium-ion conduction will unlock further technological advancement. Herein, we demonstrate fluorine-free magnesiated sulfonated poly(ether ether ketone) (Mg-SPEEK) selective capable of facilitating while effectively rejecting soluble organic species. These reversible Mg plating and stripping Coulombic efficiency (CE) 85.4% an...
Centimeter-scale gold nanoparticle (Au NP) monolayer films have been fabricated using a water/organic solvent self-assembly strategy. A recently developed approach, drain to deposit, is demonstrated be most effective in transferring the Au NP from interface various solid substrates while maintaining their integrity. The interparticle spacing was tuned 1.4 3.1 nm alkylamine ligands of different lengths. ordering increased with increasing ligand length. surface plasmon resonance and in-plane...
A stable solid electrolyte interphase (SEI) has been proven to be a key enabler most advanced battery chemistries, where the reactivity between and anode operating beyond stability limits must kinetically suppressed by such SEIs. The graphite used in state-of-the-art Li-ion batteries presents representative SEI example. Because of similar operation potentials silicon (Si), passivation mechanism thought apply on Si when using same carbonate-based electrolytes. In this work, we found that...
A new facile single-step method to fabricate crosslinked polymer electrolyte membranes consisting of branched poly(ethyleneimine), (PEI) and poly(ethylene oxide), (PEO) is demonstrated. The exhibit excellent ionic conductivity (1.2 × 10 −3 S cm −1 at 80 °C) with minimal addition plasticizer (20 wt%). amine functional group in the PEI-PEO matrix provides Lewis basic hydrogen bonding characteristics that facilitate dissolution lithium salt enables a higher cation transport number than PEO...