Current Graphite News and Events

Current Graphite News and Events, Graphite News Articles.
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Getting the lead in
Researchers developed a low-cost, high-performance, sustainable lead-based anode for lithium-ion batteries that can power hybrid and all-electric vehicles. They also uncovered its previously unknown reaction mechanism during charge and discharge. (2021-02-16)

Vibrating 2D materials
Two-dimensional materials hold out hope for many technical applications. An international research team now has determined for the first time how strongly 2D materials vibrate when electronically excited with light. (2021-02-11)

From trash to treasure: Silicon waste finds new use in Li-ion batteries
Researchers at Osaka University used Si swarf and ultrathin graphite sheets to fabricate Li-ion battery electrodes with high areal capacity and current density at a reduced cost. Increasing generation of Si swarf as industrial waste and potential use of the high-performance batteries in electronic vehicles will allow their work to contribute to reduced greenhouse gas emissions and the achievement of SDGs. (2021-02-09)

Insights into lithium metal battery failure open doors to doubling battery life
Researchers led by Prof. CUI Guanglei from the Qingdao Institute of Bioenergy and Bioprocess Technology (QIBEBT) of the Chinese Academy of Sciences (CAS) have identified what causes lithium metal batteries (LMBs) to ''self-destruct'' and proposed a way to prevent it. (2021-02-08)

Silicon anode structure generates new potential for lithium-ion batteries
New research has identified a nanostructure that improves the anode in lithium-ion batteries. Instead of using graphite for the anode, the researchers turned to silicon: a material that stores more charge but is susceptible to fracturing. The team deposited silicon atoms on top of metallic nanoparticles to form an arched nanostructure, increasing the strength and structural integrity of the anode. Electrochemical tests showed the batteries had a higher charge capacity and longer lifespan. (2021-02-05)

Polymer-derived carbon as metal-free, "green" alternative to catalysts and nano carbons
Darmstadt, February 4, 2021. The research group of Professor Bastian Etzold at the Department of Chemistry at TU Darmstadt has succeeded in synthesizing macroscopic carbons that are similar in handling to common technical catalysts. The research team has now published its results in the renowned journal Angewandte Chemie and demonstrated that these carbons can achieve the high catalytic activity and selectivity that otherwise only nanocarbons can. (2021-02-04)

Scientists optimized technology for production of optical materials for microelectronics
Scientists of Far Eastern Federal University (FEFU) have advanced the technology of high-speed sintering for optical ceramics (Nd3+:YAG), i.e. active elements generating laser emission in the near-infrared wavelength range (1.06 μm) for cutting the edge microelectronics and medicine. The researchers have managed to reduce significantly the initial nanopowders consolidation period (10 - 100 times) forming a nanostructure with ensured high optical transparency of the ceramic material. A related article appears in Optical Materials. (2021-02-04)

Surface effect of electrodes revealed by operando surface science methodology
Super-dense anions together with cations intercalation into the surface region of graphite electrode has been visualized by applying operando surface science methodology over an Al/HOPG planar model device. The observed unusual electrochemical behavior in surface region can be described as the intercalation pseudocapacitor in contrast with the battery process in the bulk. Guided by this distinct surface effect, the capacity can be doubled by using surface-dominant nano-thick graphite electrode. (2021-02-04)

Charged up: revolutionizing rechargeable sodium-ion batteries with 'doped' carbon anodes
Rechargeable batteries like lithium-ion batteries (LIBs) are seeing a surge in demand as technologies like electric propulsion ships and other vehicles become increasingly popular. However, lithium is costly, which has driven the search for other options. Sodium-ion batteries (SIBs) are a more sustainable alternative but are thermodynamically unstable with graphite--the usual anode material. Now, researchers in Korea have developed a ''heteroatom-doped'' (modified) carbon-based anode that helps SIBs to surpass the performance of LIBs. (2021-01-25)

Diamonds need voltage
Diamonds are fascinating - as jewellery but also because of the extreme hardness of the material. How exactly this variant of carbon is formed deep underground and under extremely high pressures and temperatures remains a mystery. Now, researchers from the Russian Academy of Sciences Novosibirsk, collaborating with the German Research Centre for Geosciences GFZ, have documented a new influencing factor in theory and experiment. Weak electric fields can be a decisive catalyst for its formation (2021-01-21)

How short circuits in lithium metal batteries can be prevented
There are high hopes for the next generation of high energy-density lithium metal batteries, but before they can be used in our vehicles, there are crucial problems to solve. An international research team led by Chalmers University of Technology, Sweden, has now developed concrete guidelines for how the batteries should be charged and operated, maximising efficiency while minimising the risk of short circuits. (2021-01-19)

Inexpensive battery charges rapidly for electric vehicles, reduces range anxiety
Range anxiety, the fear of running out of power before being able to recharge an electric vehicle, may be a thing of the past, according to a team of Penn State engineers who are looking at lithium iron phosphate batteries that have a range of 250 miles with the ability to charge in 10 minutes. (2021-01-18)

Researchers resolve controversy over energy gap of Van der Waals material
Scanning tunneling microscopy and spectroscopy measurements revealed that the energy gap of chromium tribromide is around 0.3 electron volt (eV), which is much smaller than optical measurements, which ranged from 1.68 to 2.1 eV. (2021-01-15)

Researchers turn coal powder into graphite in microwave oven
The University of Wyoming team created an environment in a microwave oven to successfully convert raw coal powder into nano-graphite, which is used as a lubricant and in items ranging from fire extinguishers to lithium ion batteries. (2021-01-06)

Scientists develop an efficient way to produce low-cost heatsinks
NUST MISIS scientists found a way to reduce the cost of industrial and electronics heatsinks production up to 10 times. Consequently, the product itself would also cost less. The proposed methods presume the use of rubbers and silicon carbide as components, i.e. these components are mixed, pressed and sintered. The article on the research is published in Polymers. (2020-12-21)

Nanoengineered cement shows promise for sealing leaky gas wells
Leaking natural gas wells are considered a potential source of methane emissions, and a new nanomaterial cement mixture could provide an effective, affordable solution for sealing these wells, according to a team of Penn State scientists. (2020-12-14)

ETRI, DGIST develop new electrode structure for all-solid-state secondary battery
South Korean researchers have developed a new type of electrode structure for all-solid-state secondary batteries. If this technology is adopted, the energy density of the batteries could increase significantly when compared to existing technologies, contributing tremendously to the development of high-performance secondary batteries. (2020-12-02)

RUDN University physicists described a new type of amorphous solid bodies
Many substances with different chemical and physical properties, from diamonds to graphite, are made up of carbon atoms. Amorphous forms of solid carbon do not have a fixed crystal structure and consist of structural units--nanosized graphene particles. A team of physicists from RUDN University studied the structure of amorphous carbon and suggested classifying it as a separate type of amorphous solid bodies: a molecular amorphic with enforced fragmentation. (2020-12-02)

Skoltech scientists run a 'speed test' to boost production of carbon nanotubes
Skoltech researchers have investigated the procedure for catalyst delivery used in the most common method of carbon nanotube production, chemical vapor deposition (CVD), offering what they call a ''simple and elegant'' way to boost productivity and pave the way for cheaper and more accessible nanotube-based technology. (2020-12-01)

Staying ahead of the curve with 3D curved graphene
A team of researchers has amplified 3D graphene's electrical properties by controlling its curvature. (2020-11-20)

Mystery solved: a 'New Kind of Electrons'
Why do certain materials emit electrons with a very specific energy? This has been a mystery for decades - scientists at TU Wien have found an answer. (2020-11-19)

Room temperature conversion of CO2 to CO: A new way to synthesize hydrocarbons
Researchers at the National Institute of Standards and Technology (NIST) and their colleagues have demonstrated a room-temperature method that could significantly reduce carbon dioxide levels in fossil-fuel power plant exhaust, one of the main sources of carbon emissions in the atmosphere. (2020-11-02)

Sludge-powered bacteria generate more electricity, faster
A new electroactive bacterium could help fuel wastewater treatment reactors. (2020-10-19)

Next-gen smartphones to keep their cool
Multilayered carbon material could be the perfect fit for heat management in electronic devices. (2020-10-07)

Tunable free-electron X-ray radiation from van der Waals materials
The suggested apparatus produces controlled radiation with a narrow spectrum that can be tuned with high resolution, at a relatively low energy investment. The findings are likely to lead to breakthroughs in a variety of fields, including the analysis of chemicals and biological materials, medical imaging, X-ray equipment for security screening, and other uses of accurate X-ray sources (2020-10-01)

Geoscience: Cosmic diamonds formed during gigantic planetary collisions
Geoscientists from Goethe University have found the largest extraterrestrial diamonds ever discovered - a few tenths of a millimetre in size nevertheless - inside meteorites. Together with an international team of researchers, they have now been able to prove that these diamonds formed in the early period of our solar system when minor planets collided together or with large asteroids. These new data disprove the theory that they originated deep inside planets - similar to diamonds formed on Earth - at least the size of Mercury (PNAS). (2020-09-29)

Ways to improve petroleum coke combustibility studied with presence of metal catalysts
The fixed fluidized bed technology is already widely used overseas, but is relatively new for the Russian oil industry. To improve it, the KFU scientists mixed coke particles with quartz sand. This created a sort of a ''freeze'' in the porous layer and simplified the study of the kinetics of petroleum coke combustion in the presence of catalysts. (2020-09-21)

Scientists identify solid electrolyte materials that boost lithium-ion battery performance
The discovery could help battery researchers design the first solid electrolytes that are safe, cheap and efficient. (2020-09-21)

What happens between the sheets?
Adding calcium to graphene creates an extremely-promising superconductor, but where does the calcium go? In a new study, a Monash-led team has for the first time confirmed what actually happens to those calcium atoms. Surprising everyone, the calcium goes underneath both the upper graphene sheet and a lower 'buffer' sheet, 'floating' the graphene on a bed of calcium atoms. (2020-09-17)

Ultrahigh energy density transition-metal-free cathodes designed by band structure engineering
An effective strategy for tuning the electrochemical potentials of carbonaceous electrodes is proposed, which can dramatically shift-down the Fermi level of systems to enhance the electrochemical potentials as well as improve structural stabilities. The average Li+ intercalation potential of the newly designed LiBCF2/LiB2C2F2 cathodes reach 3.49/3.63 V, delivering the record-breaking high energy densities of 1379.9/1073.8 Wh kg?1. This work guides the design of next-generation transition-metal-free cathode materials through band structure engineering. (2020-09-15)

Solvation rearrangement brings stable zinc/graphite batteries closer to commercial grid storage
A research team led by Prof. CUI Guanglei and ZHAO Jingwen from Qingdao Institute of Bioenergy and Bioprocess Technology (QIBEBT), Chinese Academy of Sciences (CAS) proposed an approach of solvation rearrangement that brings stable zinc/graphite batteries closer to commercial grid storage. (2020-09-10)

New anode material could lead to safer fast-charging batteries
Scientists at UC San Diego have discovered a new anode material that enables lithium-ion batteries to be safely recharged within minutes for thousands of cycles. Known as a disordered rocksalt, the new anode is made up of earth-abundant lithium, vanadium and oxygen atoms arranged in a similar way as ordinary kitchen table salt, but randomly. It is promising for commercial applications where both high energy density and high power are desired, such as electric cars, vacuum cleaners or drills. (2020-09-02)

CU scientists create batteries that could make it easier to explore Mars
Electrifying research by Clemson University scientists could lead to the creation of lighter, faster-charging batteries suitable for powering a spacesuit, or even a Mars rover. (2020-08-31)

New tech extracts potential to identify quality graphene cheaper and faster
Engineers at Australia's Monash University have developed world-first technology that can help industry identify and export high quality graphene cheaper, faster and more accurately than current methods. (2020-08-26)

Meteorite strikes may create unexpected form of silica
When a meteorite hurtles through the atmosphere and crashes to Earth, how does its violent impact alter the minerals found at the landing site? What can the short-lived chemical phases created by these extreme impacts teach scientists about the minerals existing at the high-temperature and pressure conditions found deep inside the planet? New work examining the crystal structure of the silica mineral quartz under shock compression is challenging longstanding assumptions about this ubiquitous material. (2020-08-26)

Graphene sensors find subtleties in magnetic fields
Cornell researchers used an ultrathin graphene ''sandwich'' to create a tiny magnetic field sensor that can operate over a greater temperature range than previous sensors, while also detecting miniscule changes in magnetic fields that might otherwise get lost within a larger magnetic background. (2020-08-20)

No more playing with fire: Study offers insight into 'safer' rechargeable batteries
Lithium-ion batteries are used in various electronic devices. But, they also come with potential hazards, particularly if the battery is damaged or overcharged. This usually occurs because, in its overcharged state, spiky structures called 'lithium dendrites' get deposited in the battery. Now, scientists at Okayama University use a technique called 'operando nuclear magnetic resonance' to track the precise mechanism of dendrite formation. They also extend their experiments to sodium-ion batteries, making their practical application easier. (2020-08-19)

Russian chemists proposed a new design of flow batteries
Redox flow batteries are promising long-term energy storage devices in smart power grids. Scientists from Mendeleev University, IPCP RAS and other institutes have proposed a new design of RFB with flow plates made from graphite foil by laser cutting procedure. It will simplify and reduce the cost of research and help to unleash the full potential of new technology. The research article was published in the journal ChemPlusChem. (2020-08-18)

New advance in superconductors with 'twist' in rhombohedral graphite
An international research team led by The University of Manchester has revealed a nanomaterial that mirrors the 'magic angle' effect originally found in a complex man-made structure known as twisted bilayer graphene -- a key area of study in physics in recent years. (2020-08-12)

Anode material for safe batteries with a long cycle life
Researchers at Karlsruhe Institute of Technology (KIT) and Jilin University in Changchun/China investigated a highly promising anode material for future high-performance batteries - lithium lanthanum titanate with a perovskite crystal structure (LLTO). As the team reported in the Nature Communications journal, LLTO can improve the energy density, power density, charging rate, safety, and cycle life of batteries without requiring a decrease of the particle size from micro to nano scale. (DOI: 10.1038/s41467-020-17233-1) (2020-08-06)

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