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Researchers Innovate to Increase EV Drive Time
Transportation is now the number one contributor to U.S. greenhouse gas emissions, as EcoWatch reported in December. That's why it's good news that researchers revealed this week that they are making headway in developing innovations that would increase the amount of time electric vehicles spend on the road before having to be recharged.
Researched published Monday in Advanced Materials by the Department of Energy's (DOE) Pacific Northwest National Laboratory (PNNL) demonstrated a battery that could recharge seven times more than other batteries and double the miles an electric car can cover before having to be recharged.
And a press release issued by the University of Colorado (CU) Boulder on Tuesday reported that engineers there are working on technology that would allow cars to charge wirelessly as they drive over special plates installed in the road.
The PNNL study looked specifically at the problem of lithium-metal batteries. These are considered the "'holy grail' of energy storage systems," the PNNL press release said, because they have two-to-three times the battery storage capacity of lithium-ion batteries and can therefore enable a car to travel more than two times as far on a single charge.
According to the DOE, the majority of hybrid-electric and electric vehicles on the roads right now use lithium-ion batteries, like the ones that also power cell-phones and computers.
As Greentech Media explained, a battery has positive and negative electrodes. When charging or discharging, the electrodes exchange negative and positive ions through an electrolyte solution. Lithium-ion batteries use graphite for the negative electrode, while lithium-metal batteries use lithium, which can store more energy.
However, the electrolyte solution in lithium-metal batteries tends to corrode the electrodes. Adding more lithium salt to the electrolyte solution helps preserve the life of the battery, but also reduces conductivity. It is also expensive.
DOE researchers at PNNL were able to devise an electrolyte that struck the right salt balance to devise batteries that could recharge seven more times than standard models.
"We were trying to preserve the advantage of the high concentration of salt, but offset the disadvantages," PNNL senior battery researcher Ji-Guang "Jason" Zhang said in the release. "By combining a fluorine-based solvent to dilute the high concentration electrolyte, our team was able to significantly lower the total lithium salt concentration yet keep its benefits."
The technology isn't ready for the road yet. The batteries they first tested the fluid in were the size of watch batteries, and the next step is to test the electrolyte in a cell-phone sized battery.
Engineers at CU Boulder are also working on a promising technology that needs more time to develop.
Khurram Afridi and his colleagues at CU Boulder's Department of Electrical, Computer, and Energy Engineering have devised a proof of concept for wirelessly transferring electrical energy through electrical energy fields at high frequencies. Afridi told CU Boulder the technology could be used to allow electric cars, which can now only travel 100 to 250 miles before recharging, to charge on the go.
"On a highway, you could have one lane dedicated to charging," Afridi said
Afridi has modeled this in the lab by setting up two metal plates representing roadway chargers 12 centimeters (approximately 4.7 inches) below two metal plates representing charging plates inside an electric car. When Afridi directs power to the bottom plates, they light a lightbulb above the top plates. The project has developed to the point where Afridi can transfer kilowatts of power between the plates at megahertz-scale frequencies.
"As a scientist, you feel challenged by things that people tell you are impossible to do," Afridi said in the CU Boulder release.
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Wolves and Jaguars Are Already Threatened by Border Razor Wire As Trump Vetoes Bid to Block Emergency Wall Funding
President Donald Trump issued the first veto of his presidency Friday, overturning Congress' vote to block his national emergency declaration to fund a border wall that environmental advocates say would put 93 endangered species at risk. However, the president's decision came the same day as an in-depth report from UPI revealing how razor wire placed at the border in the last four months already threatens wildlife.
Yet another whale has died after ingesting plastic bags. A young male Cuvier's beaked whale was found washed up in Mabini, Compostela Valley in the Philippines Friday, CNN reported. When scientists from the D' Bone Collector Museum in Davao investigated the dead whale, they found it had died of "dehydration and starvation" after swallowing plastic bags―40 kilograms (approximately 88 pounds) worth of them!
By Joe Sandler Clarke
"Don't expect us to continue buying European products," Malaysia's former plantations minister Mah Siew Keong told reporters in January last year. His comments came just after he had accused the EU of "practising a form of crop apartheid."
A few months later Luhut Pandjaitan, an Indonesian government minister close to President Joko 'Jokowi' Widodo, warned his country would retaliate if it was "cornered" by the EU.
By Luis Torres
For some people who live along the U.S.-Mexico border, President Trump's attempt to declare a national emergency and extend the border wall is worse than a wasteful, unconstitutional stunt. It's an attack on their way of life that threatens to desecrate their loved ones' graves.
At least 150 people have died in a cyclone that devastated parts of Mozambique, Zimbabwe and Malawi over the weekend, The Associated Press reported Sunday. Cyclone Idai has affected more than 1.5 million people since it hit Mozambique's port city of Beira late Thursday, then traveled west to Zimbabwe and Malawi. Hundreds are still missing and tens of thousands are without access to roads or telephones.
"I think this is the biggest natural disaster Mozambique has ever faced. Everything is destroyed. Our priority now is to save human lives," Mozambique's Environment Minister Celso Correia said, as AFP reported.