Connect with us


Inventor of the graphite anode – key Li-ion battery tech – says he can now charge an electric car in 10 minutes • The Register



Feature Morocco-born Dr Rachid Yazami has lived all over the world, thanks to an invention he made in his first year as a PhD student – the graphite anode – which is one of the key components that make lithium-ion batteries perform so well.

With electric vehicles on the rise, he believes the invention will soon take you everywhere, too.

Yazami’s story starts in the mid-1970s when scientists knew that graphite could help to form molten or powdered lithium into a usable energy storage material but struggled to turn it into a product. In 1983 Yazami and co-author Ph. Touzain cracked the problem by using a solid polymer electrolyte.

Their technique helped to make mass-manufactured Li-ion batteries affordable, reliable, long-lived and possessing the power cycling stability that has made them ubiquitous.

The anode has since propelled Yazami to a globe-spanning career in France, California, Japan and now Singapore, where The Register caught up with him in the offices of his company, KVI near the National Technological University.

Professor Yazami said the anode “made me popular, but not rich.” It also gave him some bragging rights:

Pre-pandemic, the anode was estimated by Lux Research analysts to be worth 10 to 15 per cent of the total cost of a lithium-ion battery and the global anode material market was predicted to grow to $10bn by 2025.

These days, Yazami is chasing another breakthrough: fast-charging batteries. And he says his company is already breaking records:

Yazami said his company’s rapid charging tech works by using a new approach to getting current into a car.

“Traditionally, batteries have been charged by applying constant current, much in the way that one would fill up a gas tank, you put the nozzle in and start pumping,” he explained.

Yazami’s method instead uses “nonlinear voltammetry” that controls voltage instead of controlling the current.

As explained to The Register this involves thinking of voltage like steps on a ladder. Voltage must stay constant, essentially on one rung of the ladder, until parameters are met and it can move up to the next step, eventually reaching the top of the ladder when fully charged. Yazami said this method gives batteries a rest during the charging process, changing how they respond.

“The speed a battery will charge depends on its resilience to take a charge,” said Yazami. “You have to make the battery happy.”

While a fast charge is convenient for a consumer, it is also important for the life of the battery, and at the top of the list of things Yazami would like to improve for the future of lithium-ion batteries.

“The technology that enables fast charging also extends the life of the battery by avoiding stress. Instead of keeping your battery for five years, you can keep it for ten years, because the way we are charging the battery does not put it under high temperature or high current stress,” he said. His dream battery situation would be ten minutes of charge for a range of 800km.

The two other problems he sees with batteries are energy density — which can help a driver stay on the road longer — and safety.

”Energy density has been increasing since the inception of lithium-ion batteries in 1991, until 2015 or 2016 when it plateaued,” he said. “The increase before it plateaued was about 80 per cent a year.”

”To give you an idea, when Sony first launched a [Li-Ion] battery, it was about 90 watt hours per kilogram. We are now close to 270, which is three times that. Some of the lithium-ion batteries can provide 290 watt hour per kilogram. I have tested them in the lab — they are commercial batteries, they are already there.”

”The target is to go to 300. To my knowledge there is no 300 watt hour per kilogram on the market — not yet. There are some prototypes, but when you increase the energy density there are some problems with life and safety of battery.”

Tesla's new battery design

Tesla to build cars made of batteries and hit $25k price tag about three years down the road


Safety is also on Yazami’s mind, because Li-ion batteries can behave badly if they are punctured or stressed. Preliminary reports regarding a fatal crash of a 2019 Tesla Model S in Texas last month revealed that a fire started in the battery, which was damaged in the crash.

”We can’t prevent fire in extreme situations, but at least we can have signs before it happens,” the professor told The Register.

“We need a technology that is proactive many weeks or even one month in advance. A weak battery with a risk, you’ll know it as the end user. You can then choose to service the battery pack, or replace it, or not use it at all. That will increase the safety by three or four times.”

He went on to describe what this could like: a sensor on the battery that measures its size as the material expands with heat, and a display system that in turn alerts the driver.

“It’s like a seat belt – it is not a total prevention strategy,” said Yazami.

The scientist reckons EV battery technology will continue to extend beyond cars and scooters, and we will see the rise of electric airplanes – likely predominantly for individual use – in the next 20 to 30 years.

He also predicted Europe will grow from providing 3 per cent of battery manufacturing to 20 per cent, as the EU continues to increase the number of billion-dollar gigafactories.

“Currently the EV market is in the EU, and the manufacturing is in China,” said Yazami. “That’s a problem.” ®

Source link


Orion the humpback whale ‘a dream sighting’ for marine observers



A member of the Irish Whale and Dolphin Group spotted the humpback whale while out conducting a survey on marine life off the Donegal coast.

Marine mammal observer Dr Justin Judge described the moment he spotted a lone humpback whale off the coast of Donegal as “a dream sighting.”

Judge spotted the whale at 9.30 on the morning of 9 July while representing the Irish Whale and Dolphin Group (IWDG) on board the Marine Institute’s RV Celtic Explorer.

The group of researchers and observers was out on the waters around 60 kilometres north-northwest of Malin Head when they saw the whale. They were carrying out the annual Western European Shelf Pelagic Acoustic (WESPAS) survey.

“This is a dream sighting for a marine mammal observer,” Judge said. He explained that the creature would be nicknamed Orion – which had a personal meaning for Judge and his family.

“The individual humpback whale ‘Orion’ has been named after the Greek mythological hunter, since the whale was moving with the fish stocks for food. It is also my son’s middle name so fitting on both fronts,” Judge said.

Support Silicon Republic

He added that the team had also observed “a lot of feeding action from a multitude of cetacean species that day, including bottlenose, common, Risso’s and white-sided dolphins, grey seals and minke whales.”

To date, the IWDG has documented 112 individual humpback whales in Irish waters since 1999, many of which are recorded year after year. Humpback whales are frequent visitors to Irish waters as they are an ideal feeding area for humpback whales stopping off in the area on their migration across the Atlantic.

The beasts are identifiable thanks to the distinctive pattern on the underside, which is unique to every individual whale.

“Observing any apex predator in its natural environment is exciting but a new humpback whale for Irish waters, this is special,” WESPAS survey scientist, Ciaran O’Donnell of the Marine Institute said.

The Marine Institute’s WESPAS survey is carried out annually, and surveys shelf seas from France northwards to Scotland, and west of Ireland. WESPAS is the largest single vessel survey of its kind in the Northeast Atlantic, covering upwards of 60,000 nautical miles every summer. The survey is funded through the European Maritime Fisheries and Aquaculture Fund under the Data Collection Programme which is run by the Marine Institute.

Source link

Continue Reading


Tesla second-quarter profits top $1bn even as it struggles to handle demand | Tesla



Tesla made a profit of more than $1bn in the last three months even as it struggled to keep up with demand for electric cars in the face of a global chip shortage.

The company announced Monday that it has made a profit of $1.14bn in its second quarter, 10 times what it made a year ago and its eighth quarter of back-to-back profits.

Tesla has already reported deliveries of 201,250 electric vehicles, and production of 206,421 total vehicles, during the quarter ending 30 June.

Car manufacturers across the world have struggled to keep up with demand amid a shortfall of semiconductors.

“Our biggest challenge is supply chain, especially microcontroller chips. Never seen anything like it,” said Elon Musk, Tesla’s chief executive, in June. “Fear of running out is causing every company to over-order – like the toilet-paper shortage, but at epic scale.”

The company has pivoted to using other suppliers and the shortage has not dampened enthusiasm for its vehicles, especially Tesla’s Model Y compact sport-utility vehicle, the most popular all-electric vehicle in the US.

“Public sentiment and support for electric vehicles seems to be at a never-before-seen inflection point,” the company said in a statement.

The company’s shares rose more than 2% in after hours trading.

Source link

Continue Reading


SSD belonging to Euro-cloud Scaleway was stolen from back of a truck, then turned up on YouTube • The Register



In brief Deepmind and the European Bioinformatics Institute released a database of more than 350,000 3D protein structures predicted by the biz’s AI model AlphaFold.

That data covers the 20,000 or so proteins made in the human body, and is available for anyone to study. The proteomes of 20 other organisms, from Zebrafish to E.coli bacteria, are also in there, too, and hundreds of millions of more structures will be added over time, we’re told.

“In the hands of scientists around the world, this new protein almanac will enable and accelerate research that will advance our understanding of these building blocks of life,” said DeepMind’s CEO Demis Hassabis. He hopes that it will be a valuable resource that will be used in the discovery of new drugs and our understanding of diseases.

Source link

Continue Reading


Subscribe To Our Newsletter

Join our mailing list to receive the latest news and updates 
directly on your inbox.

You have Successfully Subscribed!