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Scientists at the National Renewable Energy Laboratory (NREL) and Northern Illinois University (NIU) have successfully prevented lead from escaping damaged perovskite solar cells. The research effort is their latest work in addressing concerns about potential lead toxicity.

The light-absorbing layer in perovskite solar cells contains a small amount of lead. Simply encapsulating solar cells does not stop lead from leaking if the device was to become damaged by severe weather conditions, such as a hailstorm. Instead, chemical absorption holds the key.

The researchers report being able to capture more than 99.9% of leakage. Their findings, in an article titled “On-device lead absorbing tapes for sustainable perovskite solar cells,” appears in the journal Nature Sustainability.

The authors are Fei Zhang, Jinhui Tong, and Kai Zhu of NREL; and Xun Li, Jianxin Wang, and Tao Xu of NIU.

“It is valuable to develop an approach that can be applied to various perovskite solar cell configurations,” Zhu said.

Zhu and some of the same researchers in 2020 reported successful experiments in sequestering lead should a perovskite cell become damaged. They developed lead-absorbing films, applied them to the two sides of a cell, and then smashed them with a hammer and slashed them with a knife. The damaged cell was then immersed in water. The scientists found the films prevented more than 96% of the lead from leaking into the water.

Researchers elsewhere followed up on the lead concern and developed a resin that could be incorporated into a perovskite solar cell. But, as the NREL and NIU scientists noted, “These additional modifications could complicate the device fabrication and configuration and potentially limit device performance and scale-up.”

Instead, the authors noted in the paper, a better proposition is to develop durable and highly efficient lead-absorbing components that can be “conveniently mounted” onto the perovskite solar cell as an accessory.

The NREL and NIU scientists believe they have found a solution in using a tape-like chemical absorption approach that can be readily installed on both sides of a perovskite solar cell. In a series of tests, the tapes captured almost all of the lead leakage without compromising the cell’s performance and operation. The tapes were made of a standard solar ethylene vinyl acetate (EVA) film and a pre-laminated di(2-ethylhexyl) methanediphosphonic acid layer.

After damaging the perovskite solar cells, the scientists conducted a series of tests to quantify how much lead would escape into water. In one experiment, the concentration of lead in water that fell on the damaged device averaged about 19.14 parts per million. The tape brought that figure down to 2.13 parts per billion. To put this figure in context, the Environmental Protection Agency considers water safe to drink if the lead content is less than 15 parts per billion.

Since EVA has been extensively used as a cost-effective and durable encapsulating material for silicon-based solar panels, the integration of lead-absorbing materials with EVA provides an industrially ready and stand-alone component to facilitate the future market adoption of perovskite solar cells,” Xu said.

The Department of Energy’s Solar Energy Technology Office funded the research.

Article courtesy of National Renewable Energy Laboratory (NREL).

 

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Reyes Beverage Group adds 29 Freightliner electric semi trucks to California fleet

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Reyes Beverage Group adds 29 Freightliner electric semi trucks to California fleet

Daimler Truck North America has helped alcohol distributor Reyes Beverage Group deploy fully 29 zero-emission Freightliner eCascadia Class 8 electric semi trucks in its California delivery fleet.

Reyes Beverage Group (RGB) plans to deploy the first twenty Freightliner electric semi trucks at its Golden Brands – East Bay and Harbor Distributing – Huntington Beach warehouses, marking the first phase in the company’s transition to a fully zero emission truck fleet by 2039. An additional nine eCascadia Class 8 HDEVs are scheduled for delivery to RBG’s Gate City Beverage – San Bernardino warehouse before the end of 2024.

RBG’s decision to adopt the Freightliner eCascadia builds on its recent transition to renewable diesel and its ongoing idle-time reduction program. These electric vehicles (EVs) “go electric” will contribute significantly toward the company’s stated goal of reducing its carbon emissions 60 percent by 2030. These 2 trucks will save some 98,000 gallons of diesel fuel annually, and avoid putting nearly 700 metric tons of carbon dioxide and other harmful emissions into California’s air each year.

“We are excited to be among the first in our industry to adopt these electric vehicles,” explains Tom Reyes, President of RBG West. “This is a significant step toward our sustainability goals and ensuring compliance with state regulation as we transition our fleet to EV.”

Freightliner’s eCascadia electric semi trucks offer a number of battery and drive axle configurations with ranges between 155 and 230 miles, depending on the truck specification, to perfectly match customers’ needs without compromising on performance and load capacity. RBG’s Freightliner eCascadia tractors will rely on electric charging stations installed at each facility, allowing them to recharge to 80% capacity in as little as 90 minutes for RGB’s trucks, which feature a typical driving range of 220 miles as equipped.

Electrek’s Take

Food and beverage trucks operate everywhere – not just at the ports but in urban population centers, too. That means they’re pumping out harmful emissions right where a lot of people live and work, and that’s no bueno, making the electrification of these vehicles a no brainer for anyone who cares about the quality of life of the people who live and work near them.

SOURCE | IMAGES: Daimler Trucks.

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Enwin Utilities adds $1 million Terex electric bucket truck to fleet [video]

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Enwin Utilities adds $1 million Terex electric bucket truck to fleet [video]

The Windsor, Ontario utility says it’s driving towards a more sustainable future after adding a dozen new electric vehicles to its fleet – including a state-of-the-art, 55-foot Terex electric bucket truck.

Based on a Class 7 (33,000 lb. GVWR) International eMV Series BEV, the Terex EV takes the eMV’s 291 kWh battery and adds the Terex Optima 55-foot aerial device and HyPower SmartPTO system to create a fully electrified utility service vehicle that can do anything its diesel counterparts can do while offering better, safer working conditions for utility crews.

“We’ve got 12 EVs,” said Gary Rossi, president and CEO, Enwin Utilities. That number represents fully 10% of the utility’s entire vehicle fleet. “Our centerpiece is our electric 55-feet bucket truck. It’s very quiet,” continues Rossi. “So (the truck) allows us, our crews, to communicate better. It’s not as loud in the community when they’re doing repairs in someone’s backyard.”

That notion is echoed by Terex, itself. The company says its HyPower SmartPTO (power take off), which replaces a mechanical PTO, avoids a loud idling engine while reducing workers’ exposure to toxic exhaust fumes.

The utility company says the new electric bucket truck cost it almost $1 million Canadian – but while that might sound like a lot, Rossi says the price is similar to what a similarly-optioned ICE version of the bucket truck would cost.

“It’s all about building Windsor’s future and literally plugging into the battery factory down the road that is being constructed and showing that Windsor is a leader on this front,” says Drew Dilkens, Mayor of Windsor. “I don’t own an internal combustion engine vehicle,” adds Mayor Wilkins. “I only own two electric cars. My wife and I, we made the change starting in 2019 and I can’t see myself ever going back.”

CTV News Windsor

Enwin says its commitment to clean energy extends beyond its vehicle fleet. The company recently unveiled a massive MW solar rooftop net metering facility at its Rhodes Drive headquarters with over 3,000 solar panels. The site, one of Canada’s largest solar installations, generates enough clean electricity to power 300 homes annually.

SOURCE | IMAGES: Terex; Enwin via CTV News Windsor.

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Damen sets a world record for most powerful electric tugboat

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Damen sets a world record for most powerful electric tugboat

Built by Damen Shipyards and the first fully electric tugboat to be deployed in the Middle East, the new RSD-E Tug 2513 Bu Tinah put in its record-breaking performance took place at Khalifa Port during ADIPEC, the world’s largest energy conference.

The RSD-E Tug 2513 is based on the already efficient hull design of the standard, diesel-powered RSD Tug 2513, but its new, fully electric propulsion arrangement enables it to offer zero emissions operations in situations where oil or fuel leakage would be – let’s say especially bad.

But, while the “clean” aspect of all-electric operation is obvious, its Guinness World Record of performance shows that the Damen RSD-E Tug 2513 is up to whatever task its owners put to it.

“This Guinness World Record achievement demonstrates that the transition to alternative energy does not come at the cost of performance,” explains Maritime & Shipping Cluster, AD Ports Group, Captain Ammar Mubarak Al Shaiba. “We are very proud that the first electric tug in the Middle East is also making waves on a global level with this accolade and the fact that in parallel it is improving the sustainability of our operations alongside cost efficiencies in terms of overall fuel saving is extremely important. This vessel is now a key component of our Marine Services fleet and our electrification strategy.”

To earn its record, the the Damen RSD-E Tug 2513 Bu Tinah recorded an average high peak bollard pull of 78.2 tonnes (about 86 ‘Murican tons). The record-setting tugboat can undertake a minimum of two towage operation on a single charge, and can be recharged on a marine DC fast charger in just two hours.

Electrek’s Take

Electric tug achieves Guinness World Record
Damen RSD-E Tug; via Damen.

We’ve come a long way since 2021, when a 6MW electric tugboat was pulling about 50 tonnes of bollard weight. A nearly 50% jump in performance without a similar weight or mass gain is a sign of advancing technology – and we are here for it.

SOURCE | IMAGES: Damen.

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