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Tesla battery researchers open path to all-electric range extender concept

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Tesla has solidified itself as an industry leader when it comes to electric vehicles and their range. However, an EV’s range could always be improved, and the company has taken great efforts to make this possible. One of these was outlined by Tesla’s battery researchers, who recently published the results of a test that cycles lithium metal on graphite to form hybrid lithium-ion/lithium metal cells. This particular innovation could open the door to an all-electric range extender.

Other automakers have used range extenders in the past, but they’ve been comprised of small petrol-powered engines that are used as a generator to recharge the vehicle’s battery pack when it is low on range. The process of cycling lithium metal on graphite, on the other hand, could lead to a 20% higher energy density than the traditional lithium-ion cells that power the Tesla’s vehicles.

Tesla’s battery research team, led by Jeff Dahn of Dalhousie University, has found a way to create a range extender of sorts without having to keep a small gas engine in the vehicle. Tesla detailed its findings in a research paper that was published to ScienceDirect on April 30. Titled “Cycling Lithium Metal on Graphite to Form Hybrid Lithium-Ion/Lithium Metal Cells,” Dahn and his researchers outlined the testing process.

The findings proved a possible 20% increase in range when using the range extender, which is comprised of “hybrid cells” that use Lithium-Ion and Lithium Metal. The cells also used an optimized electrolyte, and pressure enabled reversible plating on graphite.

The paper states:

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“A hybrid anode cell design is proposed involving lithium metal plating on top of graphite that provides a 20% increase in energy density over conventional lithium-ion cells. Pouch cells with hybrid graphite-lithium metal anodes cycled with conventional electrolytes fell below 80% capacity in under 15 cycles. However, with a dual-salt electrolyte and applied mechanical pressure optimized for lithium metal cycling, hybrid cells achieved over 150 full (100% utilization) cycles before falling below 80% capacity with a CE of 99.6% for lithium metal plating on graphite.

“We also found that intermittent high energy (100% utilization) cycles utilizing lithium metal can be dispersed among hundreds of conventional lithium-ion cycles where only the graphite is utilized. Operating the cell with this intermittent protocol shows minimal impact to the underlying graphite capacity. Therefore, these hybrid cells can operate well in “lithium-ion mode” with periodic high energy full cycles accessing the lithium metal capacity.”

Tesla’s new findings show that increased energy density is made possible with the hybrid concept. When combining lithium-ion cells with lithium metal, energy density improves as the graphite anode utilized in traditional lithium-ion cells is not capable of handling the increased energy. The utilization of a dual-salt electrolyte also increases density and decreases battery cell degradation.

Tesla’s battery researchers described the advantages of the hybrid lithium-ion/lithium metal cells in the discussion below.

“If an electric vehicle with a conventional lithium-ion battery can deliver a range of 400 km, then hybrid cells could enable a range of 480 km. By capping the upper cut-off voltage of hybrid cells to operate in lithium-ion mode, the average cell voltage and delivered capacity will decrease. As a result, operating a hybrid cell in lithium-ion mode delivers an energy density of 530Wh/L, about 25% less than a conventional lithium-ion cell.

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“This would result in a range of 300 km. In a study of driving behavior for EVs, Smart et al.34 showed that only 1% of daily trips are longer than 325 km on average. Therefore, operating hybrid cells most of the time in lithium-ion mode enabling a range of 300 km, while periodically using the lithium metal portion for long > 400 km trips, as mimicked by this testing protocol, should be viable for most drivers.”

It should be noted that the Tesla battery researchers’ study is only in their initial stages. Thus, it may take some time before the technology gets rolled out to Tesla’s fleet. The wait would likely be worth it though, as the hybrid cells could open the door to all-electric vehicles with range extender features. This would be incredibly useful for electric vehicle owners who take long road trips with family, and it could also be a notable step towards EVs gaining range parity with their petrol-powered counterparts.

Joey has been a journalist covering electric mobility at TESLARATI since August 2019. In his spare time, Joey is playing golf, watching MMA, or cheering on any of his favorite sports teams, including the Baltimore Ravens and Orioles, Miami Heat, Washington Capitals, and Penn State Nittany Lions. You can get in touch with joey at joey@teslarati.com. He is also on X @KlenderJoey. If you're looking for great Tesla accessories, check out shop.teslarati.com

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Tesla to offer Full Self-Driving gifting program: here’s how it will work

Tesla executive Raj Jegannathan said the company would be shipping the gifting program out before the holidays, making a great gift for owners just in time for Christmas.

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Credit: Tesla

Tesla will soon offer a gifting program for its Full Self-Driving (Supervised) suite, allowing people to gift a subscription to the semi-autonomous driving software for a variety of timeframes.

The idea would allow people to gift Full Self-Driving as a trial, potentially shifting them to subscribe or even buy the software outright if they find it useful.

Tesla is overhauling its Full Self-Driving subscription for easier access

FSD is a pretty difficult thing to not use once you have it, and while you still have to pay attention, and it has its shortcomings, it takes a lot of the stressors out of driving.

Tesla executive Raj Jegannathan said the company would be shipping the gifting program out before the holidays, making a great gift for owners just in time for Christmas.

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Full Self-Driving is Tesla’s semi-autonomous driving platform that is currently among the most robust options on the market. As a personal user, I find it to be an extremely beneficial feature that I use on a daily basis.

While Tesla does offer gift cards, this would be a great option to choose the present you’re giving to a family member or friend.

Tesla offers a subscription to Full Self-Driving in the United States for $99 per month; it gives people an opportunity to try the suite for a month and is more affordable in the short term for those who cannot swing the current $8,000 fee to purchase it outright.

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CEO Elon Musk has advised every Tesla owner to purchase the suite outright. In 2020, he confirmed that a subscription program would be released, but he said, “It will be economically better to have bought FSD.”

He continued in 2021, stating that “buying FSD will still be a better long-term deal than subscription.

He has also said that the monthly subscription price could rise as FSD goes to wide release, but that has yet to happen. In fact, it was originally $199 a month, but Tesla decreased the price to $99. We’re hopeful it doesn’t get more expensive.

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Elon Musk just roasted Sam Altman’s Tesla Roadster cancellation

“And you forgot to mention act 4, where this issue was fixed and you received a refund within 24 hours.

But that is in your nature.”

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Elon Musk has responded to OpenAI CEO Sam Altman’s decision to cancel his Tesla Roadster reservation, which he revealed on X on Thursday.

We reported on Altman’s decision, which he called “A tale in three acts,” showing his confirmation email from Tesla back in 2018, an email requesting his $50,000 deposit back after canceling his order, and a notification from Google that the email he sent was not delivered.

Musk did not take too kindly to the post from his tech rival, first referencing his position with OpenAI, and then confirming that Altman received his reservation deposit back within 24 hours:

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OpenAI was started by Musk, Altman, and others back in 2015, and was geared toward being a non-profit company that would develop safe artificial intelligence that would be accessible to people.

However, Musk and Altman did not agree on the future of the company. Musk left, and Altman turned OpenAI into a for-profit company. This led to a variety of lawsuits and some very public spats between the two. Musk has called out Altman for turning the company into a for-profit, which has been his main source of criticism for his former colleague.

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The Roadster has been hanging in the balance of Tesla’s manufacturing plans for seven years, but the company has made more indications that it will be unveiled later this year and will have some insane technologies.

Musk said on Friday in an episode of the Joe Rogan Experience Podcast that Tesla is “getting close to demonstrating the prototype.”

He said:

“Whether it’s good or bad, it will be unforgettable. My friend Peter Thiel once reflected that the future was supposed to have flying cars, but we don’t have flying cars. I think if Peter wants a flying car, he should be able to buy one…I think it has a shot at being the most memorable product unveil ever. [It will be unveiled] hopefully before the end of the year. You know, we need to make sure that it works. This is some crazy technology in this car. Let’s just put it this way: if you took all the James Bond cars and combined them, it’s crazier than that.”

Musk hinted that the vehicle could fly and would have “crazy technology” that would put James Bond’s vehicles to shame. It will be interesting to see what Tesla will unveil when the event happens and if it can come through on this mind-blowing teaser.

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SpaceX successfully launches 100th Starlink mission of 2025

With 100 Starlink missions completed for 2025, space enthusiasts have noted that SpaceX has successfully launched 2,554 Starlink satellites so far this year.

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(Credit: Starlink)

SpaceX achieved its 100th Starlink mission of the year on Friday, October 31, marking another milestone for 2025. 

A Falcon 9 rocket carrying 28 Starlink broadband satellites successfully lifted off from Vandenberg Space Force Base in California at 4:41 p.m. ET, carrying another 28 Starlink satellites to Low Earth Orbit (LEO).

Falcon 9 booster’s 29th flight

Roughly 8.5 minutes after liftoff, the Falcon 9’s first stage touched down on the drone ship Of Course I Still Love You in the Pacific Ocean. This marked the booster’s 29th flight, which is approaching SpaceX’s reuse record of 31 missions.

This latest mission adds to SpaceX’s impressive 138 Falcon 9 launches in 2025, 99 of which were dedicated to Starlink, according to Space.com. The company’s focus on reusing boosters has enabled this breakneck pace, with multiple launches each week supporting both Starlink’s expansion and external customers.

Starlink’s network continues massive global expansion

Starlink remains the largest active satellite constellation in history, with more than 10,000 satellites launched, nearly 8,800 of which are currently active. SpaceX recently achieved Starlink’s 10,000-satellite milestone. With 100 Starlink missions completed for 2025, space enthusiasts have noted that SpaceX has successfully launched 2,554 Starlink satellites so far this year.

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Starlink, which provides high-speed, low-latency internet connectivity even to the world’s most remote areas, has been proven to be life-changing technology for people across the globe. The service is currently operational in about 150 countries, and it currently has over 5 million subscribers worldwide. From this number, 2.7 million joined over the past year.

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