Solar Energy
Generating clean electricity with chicken feathers
Generating clean electricity with chicken feathers
by Staff Writers
Zurich, Switzerland (SPX) Oct 30, 2023
The food industry generates enormous amounts of waste and by-products, including from poultry production. Each year, some 40 million tonnes of chicken feathers are incinerated. This not only releases large amounts of CO2, but also produces toxic gases such as sulphur dioxide.
Researchers at ETH Zurich and Nanyang Technological University Singapore (NTU) have now found a way to put these feathers to good use. Using a simple and environmentally friendly process, they extract the protein keratin from the feathers and convert it into ultra-fine fibres known as amyloid fibrils. These keratin fibrils go on to be used in the membrane of a fuel cell.
Fuel cells generate CO2-free electricity from hydrogen and oxygen, releasing only heat and water. They could play an important role as a sustainable energy source in the future. At the heart of every fuel cell lies a semipermeable membrane. It allows protons to pass through but blocks electrons, forcing them to flow through an external circuit from the negatively charged anode to the positively charged cathode, thereby producing an electric current.
Making good use of industrial waste
In conventional fuel cells, these membranes have so far been made using highly toxic chemicals, or “forever chemicals”, which are expensive and don’t break down in the environment. The membrane developed by the ETH and NTU researchers, on the other hand, consists mainly of biological keratin, which is environmentally compatible and available in large quantities – chicken feathers are 90 percent keratin. This means the membrane manufactured in the laboratory is already up to three times cheaper than conventional membranes.
“I’ve devoted a number of years to researching different ways we can use food waste for renewable energy systems,” says Raffaele Mezzenga, Professor of Food and Soft Materials at ETH Zurich. “Our latest development closes a cycle: we’re taking a substance that releases CO2 and toxic gases when burned and used it in a different setting: with our new technology it not only replaces toxic substances, but also prevents the release of CO2, decreasing the overall carbon footprint cycle”, Mezzenga says.
Versatile application
However, there are further challenges to overcome before hydrogen can become established as a sustainable energy source. “Hydrogen is the most abundant element in the universe – just unfortunately not on Earth,” Mezzenga says. Since hydrogen doesn’t occur here in its pure form, it has to be produced, which requires a great deal of energy. Here, too, the new membrane could serve well in the future, because it can be used not only in fuel cells but also in water splitting.
In a process known as electrolysis, direct current is passed through water, causing oxygen to form at the (this time) positively charged anode, while hydrogen escapes at the negatively charged cathode. Pure water isn’t conductive enough for this process and often requires the addition of acids. The new membrane, however, is permeable to protons and thus enables the particle migration between anode and cathode necessary for efficient water splitting, even in pure water.
Patent pending
The researchers’ next step will be to investigate how stable and durable their keratin membrane is, and to improve it if necessary. The research team has already filed a joint patent for the membrane and is now looking for investors or companies to develop the technology further and bring it to market. .
Research Report:Renewable Energy from Livestock Waste Valorization: Amyloid-Based Feather Keratin Fuel Cells
Related Links
ETH Zurich
Powering The World in the 21st Century at Energy-Daily.com
DGIST enhances quantum dot solar cell performance
by Riko Seibo
Tokyo, Japan (SPX) Oct 04, 2024
A research team led by Professor Jongmin Choi from the Department of Energy Science and Engineering at DGIST, in collaboration with Gyeongsang National University’s Professor Tae Kyung Lee and Kookmin University’s Professor Younghoon Kim, has developed a new method that significantly boosts the performance and longevity of perovskite quantum dot solar cells. Their innovative approach addresses a key issue: surface distortions on quantum dots that hinder solar cell efficiency.
Perovskite quantum dots are widely regarded as essential for next-generation solar cells due to their high light-to-electricity conversion efficiency and scalability. However, the process of replacing the “ligands” on their surface often causes distortions, akin to crumpled paper, that degrade solar cell performance.
The research team tackled this problem by introducing short ligands that firmly grip both sides of the quantum dots. This method effectively restores the quantum dot’s distorted surface, resembling the process of flattening crumpled paper. By smoothing the surface, they significantly reduced defects and improved both the performance and the stability of the solar cells. The power conversion efficiency rose from 13.6% to 15.3%, and the cells maintained 83% of their performance over 15 days, marking a major advancement in solar cell technology.
“Through this research, we could minimize surface defects on the quantum dots and stabilize their surfaces by newly adopting these amphiphilic ligands, thereby significantly improving the efficiency and stability of the solar cells,” explained Professor Jongmin Choi. He also noted the team’s intention to extend this approach to other photoelectric devices in the future.
This study, a collaborative effort by DGIST, Gyeongsang National University, and Kookmin University, was supported by the National Research Council of Science and Technology, the DGIST R and D Program, and the New Faculty Research Foundation at Gyeongsang National University. The findings were published in the ‘Chemical Engineering Journal’ on September 15, 2024.
Research Report:Multifaceted anchoring ligands for uniform orientation and enhanced cubic-phase stability of perovskite quantum dots
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Philippines’ Marcos opens first EV battery plant
by AFP Staff Writers
Manila (AFP) Sept 30, 2024
President Ferdinand Marcos inaugurated on Monday the first factory for electric vehicle batteries in the Philippines, calling it the “future” of clean energy.
The Australian-owned lithium-iron-phosphate factory aims to produce two gigawatt-hours of batteries per year by 2030, powering about 18,000 electric vehicles or nearly half a million home battery systems.
“We have worked very hard and tried to do our best to bring this kind of technology to the Philippines with a clear recognition that this is the future,” Marcos said in a livestreamed speech.
“As the first manufacturing plant in the Philippines for advanced iron phosphate batteries… (it) sets the stage for the Philippines to become a player in clean energy storage in our part of the world.”
Located in New Clark city north of Manila, the StB Giga Factory Inc. facility will create 2,500 local jobs and channel five billion pesos ($89.2 million) into the economy each year, Marcos said.
The investment aligns with the government’s efforts to “transition our country to renewable energy”, and would help Manila “entice more investors in renewable energy facilities in the country”, he added.
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Fire breaks out at Chinese battery giant CATL plant
by AFP Staff Writers
Beijing (AFP) Sept 29, 2024
A fire broke out Sunday at a factory belonging to Chinese battery giant CATL, which supplies electric vehicle makers including Tesla, but only a “relatively small” impact on operations is expected, the company said.
A CATL spokesperson said no injuries or casualties had occurred at the plant in the coastal city of Ningde, and that “the reasons behind this accident are still under investigation”.
Emergency services were sent to the plant to fight the fire and to organise the evacuation of any people who were inside the 15,000 square metre (160,000 square feet) site, a statement by the Dongqiao Economic and Technological Development Zone said.
Firefighters were alerted to the blaze just before 11:30 AM local time (0330 GMT).
It was not immediately clear what was produced at the plant, CATL’s base in the eastern province of Fujian, but the company said the effect of the now extinguished fire would not be significant.
“The impact to CATL’s overall production operation is relatively small,” the spokesperson said.
Videos published by the Chinese business media outlet Cailianshe, and posted on the Weibo social network, showed parts of a large white building in flames with thick gray smoke rising into the air.
AFP could not immediately verify the authenticity of the images.
CATL was founded in 2011 and produces more than a third of the electric vehicle batteries sold worldwide for automakers that include Mercedes-Benz, BMW, Volkswagen, Toyota, Honda and Hyundai.
ehl-reb/des
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