PRESS-NEWS.org - Press Release Distribution
PRESS RELEASES DISTRIBUTION

Confinement effects of carbon nanotubes on polyoxometalate clusters enhance electrochemical energy storage

Confinement effects of carbon nanotubes on polyoxometalate clusters enhance electrochemical energy storage
2023-06-08
(Press-News.org)

Carbon nanotubes (CNTs) are considered ideal electrochemical energy storage materials due to their high electrical conductivity, large theoretical surface area, and good chemical stability.

However, CNTs tend to aggregate due to strong van der Waals forces, which reduces their electrochemically active area. This problem is even worse for single-walled carbon nanotubes (SWNTs) due to their high length-to-diameter ratio.

Recently, a joint research team led by Dr. WANG Xiao from the Shenzhen Institute of Advanced Technology (SIAT) of the Chinese Academy of Sciences, Dr. ZHU Sheng from Shanxi University, and Prof. LI Yan from Peking University has encapsulated polyoxometalate guest molecules within SWNTs (with a diameter of approximately 1.4 nm) to enhance the electrochemical energy storage of CNTs.

The study was published in Cell Reports Physical Science on June 8.

Owing to the confinement effect of CNTs, polyoxometalate molecules form one-dimensional chainlike structures in the CNT cavity. Such well-defined polyoxometalate@SWNT hybrids are promising as electrode materials candidates for supercapacitors.

The electron transfer from CNTs to polyoxometalates reduces the surface charge density of nanotubes, which then weakens the van der Waals forces and suppresses aggregation. Accordingly, SWNTs filled with polyoxometalates show a larger electrochemically active area and higher double-layer capacitance.

Polyoxometalate molecules can provide pseudocapacitance through reversible redox reactions, thus improving the capacitive performance of the polyoxometalate@SWNT hybrids. Notably, the confinement effect of CNTs greatly improve the cycling stability of encapsulated polyoxometalates.

As a result, this one-dimensional hybrid material exhibits enhanced electrochemical energy storage properties, with a specific capacitance of 328.6 farads per gram (@ 10 millivolts per second), which is higher than that of pure SWNTs (172.2 farads per gram). Furthermore, the assembled supercapacitor maintains a capacity retention rate of 91.3% after 10,000 cycles.

"Our study offers valuable insights into the research on the confinement effect of CNTs, which holds immense potential for harnessing high-performance energy storage and conversion materials," said Dr. WANG Xiao, a corresponding author of the study.

END


[Attachments] See images for this press release:
Confinement effects of carbon nanotubes on polyoxometalate clusters enhance electrochemical energy storage

ELSE PRESS RELEASES FROM THIS DATE:

When water temperatures change, the molecular motors of cephalopods do too

When water temperatures change, the molecular motors of cephalopods do too
2023-06-08
Cephalopods are a large family of marine animals that includes octopuses, cuttlefish and squid. They live in every ocean, from warm, shallow tropical waters to near-freezing, abyssal depths. More remarkably, report two scientists at University of California San Diego in a new study, at least some cephalopods possess the ability to recode protein motors within cells to adapt “on the fly” to different water temperatures.     Writing in the June 8, 2023 edition of Cell, first author Kavita J. Rangan, ...

A potential milestone in cancer therapy

2023-06-08
Prostate cancer is the most common non-skin cancer in men worldwide. According to international estimates about one in six men will get prostate cancer during their lifetime and worldwide, over 375’000 patients will die from it each year. Tumor resistance to current therapies plays an essential role in this and new approaches are therefore urgently needed. Now an international research team from the University of Bern, Inselspital Bern and the University of Connecticut (USA) has identified a previously unknown weak spot in prostate cancer ...

Comparing doctors to peers doesn’t make them hate their jobs and may improve quality of care, new USC Schaeffer study finds

2023-06-08
June 8, 2023 — Showing people how their behavior compares to their peers is a commonly used method to improve behavior. But in the wake of a global pandemic that exacerbated health care providers’ job dissatisfaction and burnout, questions remain about the potentially negative effects of peer comparison on the well-being of clinicians. A new study from the USC Schaeffer Center for Health Policy & Economics reveals fresh insights into the relationship between peer comparison and job satisfaction among clinicians. Published in JAMA Network Open, the study challenges prior findings that such feedback increases job dissatisfaction and burnout.   Researchers ...

Scientists discover how plants fight major root disease

Scientists discover how plants fight major root disease
2023-06-08
Researchers led by CHEN Yuhang and ZHOU Jianmin from the Institute of Genetics and Developmental Biology of the Chinese Academy of Sciences have shown how plants resist clubroot, a major root disease that threatens the productivity of Brassica crops such as rape. The study, which uncovers novel mechanisms underlying plant immunity and promises a new avenue for crop breeding, was published in Cell. Clubroot, a soil-borne disease, is the most devastating disease of Brassica crops. In China, approximately 3.2–4 million hm2 of agricultural land is affected by clubroot each year, resulting in a 20%–30% yield ...

The IL-17 protein plays a key role in skin ageing

The IL-17 protein plays a key role in skin ageing
2023-06-08
A team of researchers from IRB Barcelona and CNAG identifies the IL-17 protein as a determining factor in skin ageing. Blocking the function of IL-17 reduces the pro-inflammatory state and delays the appearance of age-related features in the skin. Published in the journal Nature Aging, the work opens up new perspectives in the development of therapies to improve skin ageing health.   A team of scientists from the Institute for Research in Biomedicine (IRB Barcelona) in collaboration with the National ...

University of Cincinnati study examines role of metabolites in disease treatment

2023-06-08
Each year, about 200,000 people in the United States are diagnosed with a bulge in the lower part of the aorta, the main artery in the body, called an abdominal aortic aneurysm (AAA). New research from the University of Cincinnati examines the role a particular metabolite plays in the development of AAA and could lead to the first treatment of the condition. The research was published in the journal Circulation. “We started the study by examining whether AAA patients themselves had an increase in trimethylamine N-oxide (TMAO).  We examined an American and Swedish ...

Study unravels the mysteries of actin filament polarity

Study unravels the mysteries of actin filament polarity
2023-06-08
Actin filaments — protein structures critical to living movement from single cells to animals — have long been known to have polarity associated with their physical characteristics, with growing “barbed” and shrinking “pointed” ends. The ends of the filament are also different in the way they interact with other proteins in cells. However, the mechanism that determines these differences has never been entirely clear to scientists. Now, researchers from the Perelman School of Medicine at the University of Pennsylvania have revealed key atomic structures of ...

Colorful foods improve athletes’ vision

2023-06-08
Nutrition is an important part of any top athlete’s training program. And now, a new study by researchers from the University of Georgia proposes that supplementing the diet of athletes with colorful fruits and vegetables could improve their visual range. The paper, which was published in Exercise and Sport Sciences Reviews, examines how a group of plant compounds that build up in the retina, known as macular pigments, work to improve eye health and functional vision. Previous studies done by UGA researchers Billy R. Hammond and ...

Research puts lens on a new vision for land use decision making

2023-06-08
A new framework for making better and more transparent decisions about the use of our land could help to balance society’s demands upon it with protecting and enhancing the environment. Researchers led by the University of Leicester have proposed a framework for decisions on land use, from nationwide policymaking to building happening at street level, that would involve the most representative range of stakeholders, from those with financial interests in the land to the local communities who use it and more besides. Now published in the journal People and Nature, it encourages decisionmakers ...

'Most horrible’ brain tumor patients falling through healthcare cracks, study shows

Most horrible’ brain tumor patients falling through healthcare cracks, study shows
2023-06-08
Patients suffering from the “most horrible” rare brain tumour are falling through the cracks of mental health provision, University of Essex researchers have found.   A recent study which interviewed patients and clinicians discovered survivors struggle to access therapy available for other serious illnesses, such as cancer, and there was a lack of specialised support.   For the first time, the mental health of British rare brain tumour patients was examined by psychologists and now researchers are calling for urgent changes to the health service.   Dr Katie Daughters hopes her findings –published in ...

LAST 30 PRESS RELEASES:

New microscope captures large, high-resolution images of curved samples in single snapshot

SwRI, UT San Antonio will test technology designed to support extended space missions to Moon, Mars

Hot flashes can be reliably predicted by an ai-driven algorithm developed by UMass Amherst and Embr Labs

FAU/Baptist Health AI spine model could transform lower back pain treatment

CDI Lab, HMH specialists identify vital pathway initiating cellular immunity in Science Immunology journal

University of Pennsylvania professor to receive the 2025 Clinical Research Prize

Revolutionary scandium doping technique extends sodium-ion battery life

High-fat diet impairs memory formation by reducing autophagy

Keck Hospital of USC named a Vizient Top Performer for third year in a row

New CRISPR test could make tuberculosis screening as simple as a mouth swab

Three-sensor overeating detection could reshape obesity treatment

Study provides first evidence that plastic nanoparticles can accumulate in the edible parts of vegetables

AI predicts complications from surgery better than doctors

New personalized risk score could improve ovarian cancer detection

People on Ozempic who eat to regulate emotions less likely to lose weight

AACR Cancer Progress Report highlights lifesaving impact of federal investments in cancer research

Indra's internet

Lymph nodes found to be key to successful cancer immunotherapy

Room-temperature terahertz device opens door to 6G networks

A hard look at geoengineering reveals global risks

When smoke signals danger: How Australian lizards evolved to escape fire

Beyond the surface: Atopic eczema linked to significantly higher risk of suicidal thoughts, major study finds

After weight loss regular exercise rather than GLP-1 weight-loss drug reduces leading cause of heart attack and strokes

EASD launches its first ever clinical practice guideline – the world’s first to focus on diabetes distress

Semaglutide provides powerful protection against diabetic retinopathy, the leading cause of blindness in working-age adults, Greek study suggests

Orforglipron taken orally once daily leads to significant body weight loss (ATTAIN-1 Study)

U of I researchers trace genetic code’s origins to early protein structures

Disease experts team up with Florida Museum of Natural History to create a forecast for West Nile virus

Researchers: Targeted efforts needed to stem fentanyl crisis

New UMaine research could help lower prescription drug costs

[Press-News.org] Confinement effects of carbon nanotubes on polyoxometalate clusters enhance electrochemical energy storage