A5009522699- Microstructure and mechanical properties
- Advancements in Battery Materials
- Aluminum Alloys Composites Properties
- Advanced Battery Materials and Technologies
- Metal and Thin Film Mechanics
- Advanced Battery Technologies Research
- Supercapacitor Materials and Fabrication
- Force Microscopy Techniques and Applications
- Aluminum Alloy Microstructure Properties
- Semiconductor materials and interfaces
- Magnesium Alloys: Properties and Applications
- Additive Manufacturing Materials and Processes
- High Entropy Alloys Studies
- Advanced materials and composites
- Cancer therapeutics and mechanisms
- Bioactive Compounds and Antitumor Agents
- Graphene research and applications
- Microstructure and Mechanical Properties of Steels
- Advanced battery technologies research
- Semiconductor materials and devices
- High-Temperature Coating Behaviors
- Nanoporous metals and alloys
- Advanced Surface Polishing Techniques
- Electromagnetic Effects on Materials
- Metallic Glasses and Amorphous Alloys
Zhejiang University
2016-2025
Beijing Institute of Neurosurgery
2025
Capital Medical University
2025
Wenzhou University
2021-2024
Zhejiang Chinese Medical University
2024
Zhoushan Hospital
2024
Henan Academy of Sciences
2023-2024
Tongji University
2024
Indiana University Health
2020-2023
Indiana University School of Medicine
2020-2023
We report direct observation of an unexpected anisotropic swelling Si nanowires during lithiation against either a solid electrolyte with lithium counter-electrode or liquid LiCoO2 counter-electrode. Such expansion is attributed to the interfacial processes accommodating large volumetric strains at reaction front that depend sensitively on crystallographic orientation. This results in lithiated remarkable dumbbell-shaped cross section, which develops due plastic flow and ensuing necking...
Abstract Damage tolerance can be an elusive characteristic of structural materials requiring both high strength and ductility, properties that are often mutually exclusive. High-entropy alloys interest in this regard. Specifically, the single-phase CrMnFeCoNi alloy displays tensile levels ∼1 GPa, excellent ductility (∼60–70%) exceptional fracture toughness ( K JIc >200 MPa√m). Here through use situ straining aberration-corrected transmission electron microscope, we report on salient...
The microstructural changes and phase transformations of tin nanoparticles during electrochemical sodiation were studied with a nanosized sodium ion battery using in situ transmission electron microscopy. It was found that the first process occurred two steps; is, crystalline Sn initially sodiated via two-phase mechanism migrating boundary to form Na-poor, amorphous Na(x)Sn alloy (x ~ 0.5), which further several Na-rich phases finally crystallized Na(15)Sn(4) = 3.75) single-phase mechanism....
Lithium-ion batteries have revolutionized portable electronics and will be a key to electrifying transport vehicles delivering renewable electricity. Amorphous silicon (a-Si) is being intensively studied as high-capacity anode material for next-generation lithium-ion batteries. Its lithiation has been widely thought occur through single-phase mechanism with gentle Li profiles, thus offering significant potential mitigating pulverization capacity fade. Here, we discover surprising two-phase...
Using advanced in situ transmission electron microscopy, we show that the addition of a carbon coating combined with heavy doping leads to record-high charging rates silicon nanowires. The and phosphorus each resulted 2 3 orders magnitude increase electrical conductivity nanowires that, turn, 1 order rate. In addition, electrochemical solid-state amorphization (ESA) inverse ESA were directly observed characterized during two-step phase transformation process lithiation: crystalline (Si)...
A composite anode of Cu/Si/Ge nanowire arrays grown on a porous Ni foam enables the outstanding capacity, rate capability and cycle stability Li-ion batteries.
Three types of nitrogen-doped hollow carbon spheres with different pore sized porous shells are prepared to investigate the performance sulfur confinement. The reason that why no is observed in previous research determined and it successfully demonstrated sulfur/polysulfide will overflow during lithiation process. As a service our authors readers, this journal provides supporting information supplied by authors. Such materials peer reviewed may be re-organized for online delivery, but not...
Carbonaceous materials have great potential for applications as anodes of alkali-metal ion batteries, such Na-ion batteries and K-ion (NIB KIBs). We conduct an in situ study the electrochemically driven sodiation potassiation individual carbon nanofibers (CNFs) by transmission electron microscopy (TEM). The CNFs are hollow consist a bilayer wall with outer layer disordered-carbon (d-C) enclosing inner crystalline-carbon (c-C). d-C exhibits about three times volume expansion c-C after full or...
Although nanoscale twinning is an effective means to enhance yield strength and tensile ductility in metals, nanotwinned metals generally fail well below their theoretical limit due heterogeneous dislocation nucleation from boundaries or surface imperfections. Here we show that Au nanowires containing angstrom-scaled twins (0.7 nm thickness) exhibit strengths up 3.12 GPa, near the ideal limit, with a remarkable ductile-to-brittle transition decreasing twin size. This opposite behaviour of...
Abstract Potassium-ion batteries (KIBs) are promising electrochemical energy storage systems because of their low cost and high density. However, practical exploitation KIBs is hampered by the lack high-performance cathode materials. Here we report a potassium manganese hexacyanoferrate (K 2 Mn[Fe(CN) 6 ]) material, with negligible content defects water, for efficient high-voltage K-ion storage. When tested in combination K metal anode, ]-based electrode enables cell specific 609.7 Wh kg −1...
Exceptional rate performance of porous carbon nanofiber anodes in potassium-ion batteries was demonstrated, showing that are a promising system for low-cost and large scale energy storage applications.
Shear-coupled grain boundary (GB) migration is of general significance in the deformation nanocrystalline and polycrystalline materials, but comprehensive understanding mechanism at atomic scale remains largely lacking. Here, we systematically investigate atomistic Σ11(113) coherent GBs gold bicrystals using a state-of-art situ shear testing technique combined with molecular dynamic simulations. We show that shear-coupled GB can be realised by lateral motion layer-by-layer nucleated...
Abstract Rechargeable batteries that make renewable energy resources feasible for electrification technologies have been extensively investigated. Their corresponding performance is strongly dependent on the structural characteristics and chemical dynamics of internal electrode electrolyte materials under operating conditions. To enhance battery lifetime, a comprehensive understanding structure‐dynamics‐performance correlation such different working conditions great significance....
Dense networks of deformation twins endow metals and alloys with unprecedented mechanical properties. However, the formation mechanism these hierarchical twin structures remains under debate, especially their relations imperfect nature boundaries (TBs). Here, we investigate intrinsic deformability defective TBs in face-centered cubic metallic materials, where inherent kinks on a set primary are demonstrated to facilitate secondary nanotwins. This defect-driven twinning propensity is...
In this article, we report a study of the electrochemical performance and degradation mechanism tin (Sn) nanoparticle anodes in potassium-ion batteries (KIBs). A high capacity 197 mAh/g was found for Sn nanoparticles KIBs. situ transmission electron microscopy characterization revealed two-step potassiation mechanism: formation KSn phase after full reversible nanopore during cycling nanoparticles. However, significant fading occurred few cycles, which caused by severe pulverization This work...
For the first time, lithiation/delithiation behavior of tellurium at room temperature was investigated using tellurium/porous carbon (Te/C) composite electrodes.
Silica (SiO2) glass, an essential material in human civilization, possesses excellent formability near its glass-transition temperature (Tg > 1100 °C). However, bulk SiO2 glass is very brittle at room temperature. Here we show a surprising brittle-to-ductile transition of nanofibers as diameter reduces below 18 nm, accompanied by ultrahigh fracture strength. Large tensile plastic elongation up to 18% can be achieved low strain rate. The unexpected ductility due free surface affected zone the...
Lithiation of individual multiwalled carbon nanotubes (MWCNTs) was conducted in situ inside a transmission electron microscope. Upon lithiation, the intertube spacing increased from 3.4 to 3.6 Å, corresponding about 5.9% radial and circumferential expansions ∼50 GPa tensile hoop stress on outermost tube wall. The straight walls became distorted after lithiation. In compression tension tests show that lithiated MWCNTs were brittle with sharp fracture edges. Such failure mode is stark contrast...