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Houston scientists discover breakthrough process for lithium-ion battery recycling

researching for the future

The Rice team's process is up to 10 times more effective than existing lithium-ion battery recycling. Photo by Gustavo Raskosky/Rice University

With the rise of electric vehicles, every ounce of lithium in lithium-ion batteries is precious. A team of scientists from Rice University has figured out a way to retrieve as much as 50 percent of the material in used battery cathodes in as little as 30 seconds.

Researchers at Rice University’s Nanomaterials Laboratory led by Department of Materials Science and NanoEngineering Chair Pulickel Ajayan released the findings a new study published in Advanced Functional Materials. Their work shows that the process overcomes a “bottleneck” in lithium-ion battery recycling technology. The researchers described a “rapid, efficient and environmentally friendly method for selective lithium recovery using microwave radiation and a readily biodegradable solvent,” according to a news release.

Past recycling methods have involved harsh acids, and alternative eco-friendly solvents like deep eutectic solvents (DESs) at times have not been as efficient and economically viable. Current recycling methods recover less than 5 percent of lithium, which is due to contamination and loss during the process.

In order to leach other metals like cobalt or nickel, both the choline chloride and the ethylene glycol have to be involved in the process, according to the researchers at Rice. The researchers submerged the battery waste material in the solvent and blasted it with microwave radiation since they knew that of the two substances only choline chloride is good at absorbing microwaves.

Microwave-assisted heating can achieve similar efficiencies like traditional oil bath heating almost 100 times faster. Using the microwave-based process, Rice found that it took 15 minutes to leach 87 percent of the lithium, which differs from the 12 hours needed to obtain the same recovery rate via oil bath heating.

“This method not only enhances the recovery rate but also minimizes environmental impact, which makes it a promising step toward deploying DES-based recycling systems at scale for selective metal recovery,” Ajayan says in the release.

Due to rise in EV production, the lithium-ion battery global market is expected to grow by over 23 percent in the next eight years, and was previously valued at over $65 billion in 2023.

“We’ve seen a colossal growth in LIB use in recent years, which inevitably raises concerns as to the availability of critical metals like lithium, cobalt and nickel that are used in the cathodes,” the study's co-author, Sohini Bhattacharyya, adds. “It’s therefore really important to recycle spent LIBs to recover these metals.”

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Geothermal co. wins at Houston innovation event, UH secures DOE funding, and more trending energy news

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Editor's note: From Sage Geosystems winning at the Houston Innovation Awards to Daikin renaming Houston's baseball stadium, these are the top headlines that resonated with EnergyCapital readers on social media and daily newsletter this week.

Local energy innovators recognized at annual Houston Innovation Awards

At an event celebrating Houston innovation, these four energy transition leaders were recognized. Photos courtesy

This week, the Houston innovation ecosystem celebrated big wins from the year, and members of the energy transition community were recognized alongside other innovators.

The Houston Innovation Awards honored over 40 finalists across categories, naming the 12 winners and honoring the two Trailblazer Legacy Awards at the event. The event, hosted at TMC Helix Park on November 14 named and celebrated the winners, which included four energy transition innovators. Continue reading.

University of Houston secures $3.6M from DOE program to fund sustainable fuel production

Researchers Rahul Pandey, senior scientist with SRI and principal investigator (left), and Praveen Bollini, a University of Houston chemical engineering faculty, are key contributors to the microreactor project. Photo via uh.edu

A University of Houston-associated project was selected to receive $3.6 million from the U.S. Department of Energy’s Advanced Research Projects Agency-Energy that aims to transform sustainable fuel production.

Nonprofit research institute SRI is leading the project “Printed Microreactor for Renewable Energy Enabled Fuel Production” or PRIME-Fuel, which will try to develop a modular microreactor technology that converts carbon dioxide into methanol using renewable energy sources with UH contributing research. Continue reading.

Global industrial company Daikin makes deal with Houston Astros on stadium rename

The Astros' stadium will have a new name in 2025. Courtesy of the Houston Astros

The Houston Astros' home will get a new name on Jan. 1, becoming Daikin Park under an agreement through the 2039 season the team announced Monday.

The stadium opened as Enron Field in 2000 as part of a 30-year, $100 million agreement but the name was removed in March 2002 following Enron Corp.'s bankruptcy filing and the ballpark briefly became Astros Field. Continue reading.

Reliant, GM Energy team up on free renewable energy EV charging

Reliant and GM Energy will be offering free nighttime charging for Chevrolet electric vehicle drivers that enroll in the new Reliant FreeCharge Nights. Photo via reliant.com

Reliant Energy and GM Energy are advancing a new renewable energy electricity plan that will “accelerate the clean energy journey for the two companies and their customers,” according to a news release.

Houston-based Reliant and GM Energy will be offering free nighttime charging for Chevrolet electric vehicle drivers that enroll in the new Reliant FreeCharge Nights. Continue reading.

Pipeline robotics: How this Houston startup is revolutionizing corrosion monitoring

Dianna Liu of ARIX Technologies joins the Houston Innovators Podcast to share her entrepreneurial journey — and why Houston was the right place to start her company. Photo courtesy of ARIX

After working for years in the downstream energy industry where safety and efficiency were top priorities, Dianna Liu thought there was a way technology could make a huge difference.

Despite loving her company and her job, she took a leap of faith to start a robotics company to create technology to more safely and efficiently monitor corrosion in pipelines. ARIX Technologies has developed software and hardware solutions for its customers with pipelines in downstream and beyond.

"Overall, this industry is an industry that really harps on doing things safely, doing things well, and having all the data to make really informed decisions," Liu says on the Houston Innovators Podcast. "Because these are huge companies with huge problems, it takes a lot of time to set up the right systems, adopt new things, and make changes." Continue reading.

CenterPoint’s Greater Houston Resiliency Initiative makes advancements on progress

step by step

CenterPoint Energy has released the first of its public progress updates on the actions being taken throughout the Greater Houston 12-county area, which is part of Phase Two of its Greater Houston Resiliency Initiative.

The GHRI Phase Two will lead to more than 125 million fewer outage minutes annually, according to CenterPoint.

According to CenterPoint, they have installed around 4,600 storm-resilient poles, installed more than 100 miles of power lines underground, cleared more than 800 miles of hazardous vegetation to improve reliability, and installed more self-healing automation all during the first two months of the program in preparation for the 2025 hurricane season.

"This summer, we accomplished a significant level of increased system hardening in the first phase of the Greater Houston Resilience Initiative,” Darin Carroll, senior vice president of CenterPoint Energy's Electric Business, says in a news release.

”Since then, as we have been fully engaged in delivering the additional set of actions in our second phase of GHRI, we continue to make significant progress as we work toward our ultimate goal of becoming the most resilient coastal grid in the country,” he continues.

The GHRI is a series of actions to “ strengthen resilience, enable a self-healing grid and reduce the duration and impact of power outages” according to a news release. The following progress through early November include:

The second phase of GHRI will run through May 31, 2025. During this time, CenterPoint teams will be installing 4,500 automated reliability devices to minimize sustained interruptions during major storms, reduce restoration times, and establish a network of 100 new weather monitoring stations. CenterPoint plans to complete each of these actions before the start of the next hurricane season.

“Now, and in the months to come, we will remain laser-focused on completing these critical resiliency actions and building the more reliable and more resilient energy system our customers expect and deserve," Carroll adds.

CenterPoint also announced that it has completed all 42 of the critical actions the company committed to taking in the aftermath of Hurricane Beryl. Some of the actions were trimming or removing higher-risk vegetation from more than 2,000 power line miles, installing more than 1,100 more storm-resilient poles, installing over 300 automated devices to reduce sustained outages, launching a new, cloud-based outage tracker, improving CenterPoint's Power Alert Service, hosting listening sessions across the service area and using feedback.

In October, CenterPoint Energy announced an agreement with Artificial Intelligence-powered infrastructure modeling platform Neara for engineering-grade simulations and analytics, and to deploy Neara’s AI capabilities across CenterPoint’s Greater Houston service area.

Greentown launches 3rd round of collaborative accelerator for energy tech founders of color

browning the green space

For the third year, Greentown Labs and Browning the Green Space have opened applications for ACCEL, a climatetech accelerator designed to bolster BIPOC-led companies.

The program, which is a year-long commitment providing opportunities across funding, networking connections, resources, and more, has applications open until January 7. Each selected company will receive non-dilutive grant funding up to $25,000, trainings from VentureWell, a desk and membership at Greentown Houston or Boston locations, a BGS membership, and more.

A handful of startups will be selected for the program, which is looking for companies at the two to four Technology Readiness Level (TRL) stage with a technology solution across agriculture, buildings, electricity, manufacturing, resiliency and adaptation, and transportation sectors.

“ACCEL has been amazing," Chidalu Onyenso, founder of Cambridge, Massachusetts-based EarthBond, a member of the 2022 cohort, writes on the website. "I’ve really enjoyed the membership and programming. I think it’s fantastic—if I met another Black or Brown founder focused on climatetech, I’d tell them to apply to this program, 100 percent.”

Earlier this year, the program — which is supported by the Massachusetts Clean Energy Center,Microsoft's Climate Innovation Fund, Equinor, Barr Foundation — named seven companies to its second cohort and six to its inaugural batch in 2022. The 13 companies across two cohorts so far have received $325,000 in grant funding from the program.

"These BIPOC-led startups are developing climate technologies that will lead us to a more equitable and sustainable future," MassCEC CEO Dr. Emily Reichert, the former CEO of Greentown, said of the second cohort in a news release. "We want ALL climatetech innovators and entrepreneurs to thrive here in Massachusetts. We are proud to support the ACCEL accelerator, created and led by Greentown Labs and Browning the Green Space. The ACCEL program is helping us build a more diverse innovation ecosystem by breaking down barriers and expanding opportunities."

Interested and qualifying companies can apply online.

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