Nav: Home

Waste silicon sawdust recycled into anode for lithium-ion battery

February 20, 2017

Researchers have created a high performance anode material for lithium-ion batteries (LIBs) using waste silicon (Si) sawdust.

It is energy-consuming and expensive to produce Si wafers with high purity (> 99.99%). On top of that, some 50% of Si is actually discarded as industrial waste in the final cutting process. This waste is about 90 thousand tons a year worldwide, an amount large enough to meet the global demands for anode materials for LIBs.

To make this happen, under the project of "Dynamic Alliance for Open Innovation Bridging Human, Environment and Materials," a joint research team from Tohoku University and Osaka University has developed a practical and mass-producible method of recycling the unwanted Si sawdust into a high-performance anode material for LIBs.

The team found that the pulverization of the Si sawdust into Si nanoflakes (~16 nm in thickness) and the subsequent carbon coating are effective in fabricating high capacity and durable LIBs. So far, a test half-cell has achieved a constant capacity of 1200 mAh/g over 800 cycles. This capacity is 3.3 times as large as that of conventional graphite (ca. 360 mAh/g).

The proposed method of material recycling is applicable for the mass production of high-performance LIB anode materials at a reasonably low cost. The research team expects that it will have great practical use in the battery industry.
-end-


Tohoku University

Related Recycling Articles:

Recycling plant material into stock chemicals with electrochemistry
While most people think of recycling in terms of the packaging for household products, the concept can extend to the chemistry to make them in the first place.
Researchers develop recycling for carbon fiber composites
A WSU research team for the first time has developed a promising way to recycle the popular carbon fiber plastics that are used in everything from modern airplanes and sporting goods to the wind energy industry.
Making bins more convenient boosts recycling and composting rates
Want to recycle or compost more? Try moving the bins closer, new UBC research suggests.
'Recycling protein' shown to affect learning and memory in mice
Learning and memory depend on cells' ability to strengthen and weaken circuits in the brain.
New polymer additive could revolutionize plastics recycling
Only 2 percent of the 78 million tons of manufactured plastics are currently recycled into similar products because polyethylene (PE) and polypropylene (PP), which account for two-thirds of the world's plastics, have different chemical structures and cannot be efficiently repurposed together.
The U joins national sustainable manufacturing alliance for recycling and remanufacturing
The University of Utah joins the Reducing Embodied-Energy and Decreasing Emissions Institute, a national coalition that aims to drive down the cost of technologies essential to reuse, recycle and remanufacture metals and other materials.
Chemistry research breakthrough that could improve nuclear waste recycling technologies
Researchers from The University of Manchester have taken a major step forward by describing the quantitative modelling of the electronic structure of a family of uranium nitride compounds -- a process that could in the future help with nuclear waste recycling technologies.
Carbon dots dash toward 'green' recycling role
Nitrogen-doped graphene quantum dots are used as electrocatalysts to reduce carbon dioxide, a greenhouse gas, to valuable hydrocarbons like ethylene and ethanol.
The balancing act: An enzyme that links endocytosis to membrane recycling
All cells have surface membranes and maintaining the surface area of this membrane is critical to the normal functioning of cells.
Protein synthesis: Ribosome recycling as a drug target
Ludwig-Maximilians-Universitaet (LMU) in Munich researchers have elucidated a mechanism that recycles bacterial ribosomes stalled on messenger RNAs that lack termination codons.

Related Recycling Reading:

The Adventures of a Plastic Bottle: A Story About Recycling (Little Green Books)
by Alison Inches (Author), Pete Whitehead (Illustrator)

Learn about recycling from a new perspective!  Peek into this diary of a plastic bottle as it goes on a journey from the refinery plant, to the manufacturing line, to the store shelf, to a garbage can, and finally to a recycling plant where it emerges into it's new life...as a fleece jacket!

Told from the point of view of a free-spirited plastic bottle, kids can share in the daily experiences and inner thoughts of the bottle through his personal journal. The diary entries will be fun and humorous yet point out the ecological significance behind each product and the resources used to... View Details


The Adventures of an Aluminum Can: A Story About Recycling (Little Green Books)
by Alison Inches (Author), Mark Chambers (Illustrator)

Peek into this diary of an aluminum can as it goes on a journey from inside a bauxite rock, to the manufacturing line, to the store shelf, to a display on a bookshelf, to a garbage can, and finally to a recycling plant where it emerges into its new life…as a baseball bat!

This 8x8 paperback storybook is told from the point of view of an enthusiastic aluminum can. The diary entries are fun and humorous, yet point out the ecological significance behind each product and the resources used to make it. View Details


Michael Recycle
by Ellie Bethel (Author), Alexandra Colombo (Illustrator)

Just in time for Earth Day on April 22, Michael Recycle tells the adventures of a young superhero whose power allows him to teach people about recycling. After cleaning up a town, the people declare: "To Michael Recycle! The green-caped crusader, our super-green hero, the planet's new savior!" View Details


One Plastic Bag: Isatou Ceesay and the Recycling Women of the Gambia (Millbrook Picture Books)
by Miranda Paul (Author), Elizabeth Zunon (Illustrator)

Plastic bags are cheap and easy to use. But what happens when a bag breaks or is no longer needed? In Njau, Gambia, people simply dropped the bags and went on their way. One plastic bag became two. Then ten. Then a hundred.



The bags accumulated in ugly heaps alongside roads. Water pooled in them, bringing mosquitoes and disease. Some bags were burned, leaving behind a terrible smell. Some were buried, but they strangled gardens. They killed livestock that tried to eat them. Something had to change.



Isatou Ceesay was that change. She found a way to... View Details


I Can Save the Earth!: One Little Monster Learns to Reduce, Reuse, and Recycle (Little Green Books)
by Alison Inches (Author), Viviana Garofoli (Illustrator)

A new “green” series!: Little Green Books will educate children on what they can do to be more eco-friendly. The books in this line will be made from recycled materials, and the storylines will cover subjects such as improving the environment, learning about endangered animals, recycling, and much more.

Meet Max the Little Monster. He is a cute, furry green monster who is an environmental nightmare. Among other things, he leaves on all the lights, keeps his computer plugged in, blasts the TV, hoards his old toys and uses so much toilet paper it clogs the toilet until finally, his... View Details


Recycling and Upcycling: Science, Technology, Engineering (Calling All Innovators: A Career for You)
by Steven Otfinoski (Author)

From leftover food to packaging materials to outdated or broken technology, humans produce an enormous amount of waste. Readers will find out how some of todays top innovators are working to find new recycling methods and cut down on the amount of trash the ends up in landfills. They will also learn how recycling has grown in popularity over time and find out what kinds of careers are involved in this rapidly growing industry. View Details


Why Should I Recycle? (Why Should I? Books)
by Jen Green (Author), Mike Gordon (Illustrator)

What if everybody threw away old bottles and newspapers, littering the world with glass and plastic and tin cans that should be recycled and made into new products? Mr. Jones is a teacher who sets a good example for kids by separating his trash for recycling. When he takes them on a class trip to a recycling plant they learn the value of recycling. Part of every child's development involves asking questions. Today, some of the most important questions kids ask are related to the natural environment. The enlightening and entertaining four-book Why Should I? series demonstrates the... View Details


Recycling Reconsidered: The Present Failure and Future Promise of Environmental Action in the United States (Urban and Industrial Environments)
by Samantha MacBride (Author)

How the success and popularity of recycling has diverted attention from the steep environmental costs of manufacturing the goods we consume and discard.

Recycling is widely celebrated as an environmental success story. The accomplishments of the recycling movement can be seen in municipal practice, a thriving private recycling industry, and widespread public support and participation. In the United States, more people recycle than vote. But, as Samantha MacBride points out in this book, the goals of recycling -- saving the earth (and trees), conserving resources, and greening... View Details


Where Do Garbage Trucks Go?: And Other Questions About Trash and Recycling (Good Question!)
by Ben Richmond (Author)

What is a landfill? What makes some garbage dangerous? Why it is good to recycle—and can we recycle water? Kids see the garbage truck all the time—but this entertaining and educational book will tell them what it does and where it goes, along with other facts about the trash we create and how it affects the environment. View Details


Junkyard Planet: Travels in the Billion-Dollar Trash Trade
by Adam Minter (Author)

When you drop your Diet Coke can or yesterday's newspaper in the recycling bin, where does it go? Probably halfway around the world, to people and places that clean up what you don't want and turn it into something you can't wait to buy. In Junkyard Planet, Adam Minter--veteran journalist and son of an American junkyard owner--travels deep into a vast, often hidden, five-hundred-billion-dollar industry that's transforming our economy and environment.

With unmatched access to and insight on the waste industry, and the explanatory gifts and an eye for detail worthy of a John... View Details

Best Science Podcasts 2018

We have hand picked the best science podcasts for 2018. Sit back and enjoy new science podcasts updated daily from your favorite science news services and scientists.
Now Playing: TED Radio Hour

Peering Deeper Into Space
The past few years have ushered in an explosion of new discoveries about our universe. This hour, TED speakers explore the implications of these advances — and the lingering mysteries of the cosmos. Guests include theoretical physicist Allan Adams, planetary scientist Sara Seager, and astrophysicists Natasha Hurley-Walker and Jedidah Isler.
Now Playing: Science for the People

#461 Adhesives
This week we're discussing glue from two very different times. We speak with Dr. Jianyu Li about his research into a new type of medical adhesive. And Dr. Geeske Langejans explains her work making and investigating Stone Age and Paleolithic glues.