Connect with us

Tech

Ceramic material pair could unlock potential of safer, longer-lasting solid-state batteries

Published

on

Ceramic material pair could unlock potential of safer, longer-lasting solid-state batteries


Zirconia-enhanced electrolyte (left) avoids cracking seen in the baseline sample (right). Credit: David Mitlin

A team of four universities and three national laboratories, led by The University of Texas at Austin, developed a new approach for solid-state batteries, improving their performance while reducing the manufacturing costs. Solid-state batteries are an emerging energy storage technology that could unlock enhanced performance for drones, electronics and electric vehicles.

“The biggest game in town for next-generation batteries is making them all solid-state, allowing for improved safety and higher energy,” said David Mitlin, professor in the Cockrell School of Engineering’s Walker Department of Mechanical Engineering and the lead investigator on the new research published in Nature Materials. “However, much more work is needed before all solid-state batteries may be widely commercialized.”

Today, most use an organic liquid , a maple-syrup-like substance that allows lithium ions to reversibly shuttle back and forth inside the battery. Despite being technologically mature, liquid electrolytes are the hydrocarbon “fuel” in the oft-reported battery fires.

Solid, ceramic-based electrolytes reduce fire risks, eliminating the hydrocarbon fuel that sustains battery thermal runaway reactions. However, ceramic electrolytes face their own hurdles, including high costs, challenging quality control during manufacturing and premature failure due to metal filament (termed dendrite)–induced short-circuiting.

Oxide ceramics based on the garnet structure are key materials for all . Garnet’s unique structure allows lithium ions to move quickly and efficiently, making it ideal for energy storage. But even garnet has struggled to overcome the dendrite problem, which is directly linked to the formation of small cracks inside the electrolyte.

Like a jeweler refining a gemstone, the researchers have polished the garnet to reveal its full potential. Dispersing micro-scale zirconia particles throughout the garnet grains suppresses both the cracking and the dendrites.

This method is based on carbide additives, which exothermically decompose during fabrication, inputting additional heat into the synthesis reaction. This creates an additional benefit of reducing the manufacturing cost by lowering the external temperature needed for processing.

“Zirconia really pulls double duty here,” said Yixian Wang, postdoctoral researcher in Mitlin’s lab, who is the co-lead author. “It helps densify the material while also preventing those pesky lithium dendrites from forming. It’s a win–win for battery performance and safety.”

In tests, the zirconia-modified garnet achieved nearly double the critical current density—the maximum current it can handle before short-circuiting—compared to unmodified garnet. This means batteries using this material can operate at higher power levels without compromising safety.

While battery science is the driving force of this research, the results may be applied to a wide variety of manufacturing sectors for high-quality ceramics, where defect control is essential.

More information:
Vikalp Raj et al, Grain boundary zirconia-modified garnet solid-state electrolyte, Nature Materials (2025). DOI: 10.1038/s41563-025-02374-9

Citation:
Ceramic material pair could unlock potential of safer, longer-lasting solid-state batteries (2025, November 4)
retrieved 4 November 2025
from https://techxplore.com/news/2025-11-ceramic-material-pair-potential-safer.html

This document is subject to copyright. Apart from any fair dealing for the purpose of private study or research, no
part may be reproduced without the written permission. The content is provided for information purposes only.





Source link

Tech

ICE Agent’s ‘Dragging’ Case May Help Expose Evidence in Renee Good Shooting

Published

on

ICE Agent’s ‘Dragging’ Case May Help Expose Evidence in Renee Good Shooting


Defense attorneys for a Minnesota man convicted in December of assaulting Immigration and Customs Enforcement officer Jonathan Ross are seeking access to investigative files related to the killing of Renee Nicole Good, after learning Ross was the same officer who shot and killed her during a targeted operation in Minneapolis last month.

Attorneys for Roberto Carlos Muñoz-Guatemala asked a federal judge on Friday to order prosecutors to turn over training records as well as investigative files related to Ross, the ICE agent who killed Good on January 7 during Operation Metro Surge and was also injured in a June 2025 incident in which Muñoz-Guatemala dragged him with his car.

A separate post-trial motion by the defense, filed in the US District Court in Minnesota, asks the judge to pause deadlines for a new-trial motion until the discovery motion is resolved.

Muñoz-Guatemala’s attorneys argue that even if the court ultimately decides that any newly discovered evidence doesn’t entitle their client to a new trial, he’s entitled to explore whether there are mitigating factors that could impact the length of his sentence, such as whether Ross’ injuries could have been, to some degree, brought upon him by his own behavior.

A jury convicted Muñoz-Guatemala on December 10 of assault on a federal officer with a dangerous weapon and causing bodily injury.

Court filings say that Ross and other agents were attempting to interview Muñoz-Guatemala last summer, and possibly process him for deportation, because he had an administrative warrant out for being in the country without authorization. They surrounded his Nissan Altima and attempted to remove him from the vehicle. Ross then used a tool to shatter the rear driver’s-side window before reaching inside. When the defendant accelerated away, Ross testified, he was dragged approximately 100 yards, during which time he repeatedly deployed a taser. Muñoz-Guatemala subsequently called 911 to report he’d been the victim of an assault.

During his trial, Muñoz-Guatemala said he didn’t understand that Ross—who according to his own testimony was wearing ranger green and gray and wore his badge on his belt—was a federal agent. (Ross testified that Muñoz-Guatemala had asked to speak to an attorney, which would suggest he knew Ross was acting as law enforcement, but an FBI agent who witnessed the incident said he didn’t hear this. According to court records, this claim did not come up in pretrial interviews, and prosecutors said they had not heard it before he made the claim in court.) Muñoz-Guatemala’s attorneys say now that had he been tried after Good’s killing, his defense may have also asserted that he was justified in resisting Ross, who they claim was the aggressor and used excessive force.

The argument is that the jury instructions essentially contained a two-part decision tree: Jurors could convict Muñoz-Guatemala if they believed he should have known Ross was law enforcement. They could also convict him if they believed driving away was not a reasonable response.

Muñoz-Guatemala’s conviction does not indicate which of these prongs the jury relied on. If it was the latter, the defense argues in the motion, the court should have access to evidence that may have bearing on Ross’ conduct, tactics, and whether he behaved aggressively—information that might indicate whether the agent has a history behaving recklessly in the field or contrary to his training.

Prosecutors have not yet filed a response to the motions. An email to an address associated with Ross in publicly available records did not result in an immediate response. The Department of Justice did not immediately respond to a request for comment. The Department of Homeland Security did not immediately respond to questions about Ross’ current duty status or the status of any departmental review.

Ross has been placed on administrative leave following the January 7 shooting of Good, a 37-year-old Minnesota poet and mother of three, a step DHS officials say is standard protocol after fatal use of force. Ross has not been charged in Good’s killing, and the Justice Department has said it will not pursue criminal charges.



Source link

Continue Reading

Tech

RFK Jr.’s Picks for a Key Autism Panel Include Advocates for Bizarre Theories

Published

on

RFK Jr.’s Picks for a Key Autism Panel Include Advocates for Bizarre Theories


US health secretary Robert F. Kennedy Jr. has filled an autism committee with friends, associates, and former colleagues who believe that autism is caused by vaccines. Autism advocates are now worried the group could pave the way for dangerous pseudoscientific treatments going mainstream.

Last week, Kennedy announced an entirely new lineup for the Interagency Autism Coordinating Committee (IACC), a group that recommends what types of autism research the government should fund and provides guidance on the services the autism community requires. The group is typically composed of experts in the area of autism research, along with policy experts and autistic people advocating for their own community.

In a statement announcing the new panel, which includes no previous members, Kennedy claimed that he has appointed “the most qualified experts—leaders with decades of experience studying, researching, and treating autism.” But health experts and autism advocates strongly disagree, and a review of the new members of the group suggests that Kennedy appointed members of the anti-vaccine community who claim vaccines cause autism—despite there being no evidence to prove such a claim.

Among those appointed last week was Daniel Rossignol, a doctor who was sued for alleged fraud after prescribing a 7-year-old autistic child a debunked and dangerous treatment. Tracy Slepcevic, an appointee who Kennedy calls a “dear friend,” offers exposure to a wide range of bogus autism cures at her annual Autism Health Summit, including one that involves the injection of animal stem cells into children. Another appointee, Toby Rogers, has claimed that “no thinking person vaccinates” and that vaccine makers are “poisoning children.” Rogers is a fellow at the Brownstone Institute for Social and Economic Research and has also called vaccines “one of the greatest crimes in human history.” He has written articles for Children’s Health Defense (CHD), the anti-vaccine group founded by Kennedy that has linked autism to vaccines.

Other appointees are no different: John Gilmore founded the Autism Action Network and has said that his autistic son is “vaccine injured.” Gilmore is also the founder of the New York chapter of Kennedy’s Children’s Health Defense group. Ginger Taylor, the former director of the Maine Coalition for Vaccine Choice, has publicly claimed that many autism cases involve “vaccine causation.” Elizabeth Mumper has written for Children’s Health Defense and is a senior fellow with the Independent Medical Alliance, a group formerly known as the Front Line Covid-19 Critical Care Alliance that has promoted ivermectin as a treatment for Covid.

Mumper tells WIRED that her decades of work as a pediatrician and in the field of autism qualified her to be a member of the IACC. She also denied being anti-vaccine, pointing out that she has “given thousands of vaccinations in my career.”

None of the other new members of the IACC contacted by WIRED responded to requests for comment.

Just a few years ago, this may have sounded like the all-star lineup of a conspiracy conference. Today, these appointments appear routine, and just the latest example of how Kennedy has sought to remake America’s public health administration.

Kennedy’s decision, according to public health experts and autism advocates, will lead to fewer resources for people with autism and their families, and also embolden those promoting pseudoscientific treatments that can threaten the lives of autistic people.

“Once again, [Kennedy] proves that he is one of the world’s most extreme and dangerous conspiracy theorists who loves stacking his committees with anti-science, anti-public-health kooks,” Gavin Yamey, professor of global health and public policy at Duke University, tells WIRED. “The research evidence is clear that vaccines do not cause autism.” To Yamey, “it looks like RFK Jr.’s new committee has been tasked to muddy the waters and cast doubt on that evidence. RFK Jr. has spent the past year doing all he can to dismantle public health and roll back vaccination, and this new committee is more of the same.”



Source link

Continue Reading

Tech

New York Is the Latest State to Consider a Data Center Pause

Published

on

New York Is the Latest State to Consider a Data Center Pause


Lawmakers in at least five other states—Georgia, Maryland, Oklahoma, Vermont, and Virginia—have also introduced bills this year that would impose various forms of temporary pauses on data center development. While Georgia, Vermont, and Virginia’s efforts are being led by Democrats, Oklahoma and Maryland’s bills were largely sponsored by Republicans. These bills mirror several moratoriums that have already passed locally: At the end of December, at least 14 states had towns or counties that have paused data center permitting and construction, Tech Policy Press reported.

There are some signs that the data center industry is beginning to respond to the backlash. Last month, Microsoft, with a boost from the White House, rolled out a set of commitments to be a “good neighbor” in communities where it builds data centers. In response to questions on how the industry is responding to the slew of state-level legislation, Dan Diorio, the vice president of state policy at the Data Center Coalition, an industry group, tells WIRED in a statement that it “recognizes the importance of continued efforts to better educate and inform the public about the industry, through community engagement and stakeholder education, which includes factual information about the industry’s responsible usage of water and our commitment to paying for the energy we use.”

Some of the states with moratorium bills have relatively few data centers: Vermont has just two, according to Data Center Map. But Georgia and Virginia are two of the national hubs for data center development and have found themselves at the center of much of the resistance, in both public reaction to data centers and legislative pushback. More than 60 data center-related bills have already been proposed in the Virginia legislature this year, according to Data Center Dynamics, an industry news site.

Josh Thomas is a state delegate in Virginia who has been at the forefront of leading the legislative charge to put limits on the expansion of data centers. During his first legislative session, in 2024, the caucus of self-identified data center “reformers” in both the House and Senate was just three politicians. That number grew to eight in 2025, “and now, it’s 12 or 13,” he says, with many more politicians willing to vote on reform bills. His fellow lawmakers, he says, now “understand that we need to negotiate where these things go.”

Last year, a proposal introduced by Thomas which would have required data centers to perform more in-depth environmental, noise, and community impact site assessments passed the legislature, but was vetoed by then-governor Glenn Youngkin. Newly-elected Governor Abigail Spanberger, a Democrat who talked about making data centers “pay their own way” on the campaign trail, seems much more likely to reconsider this year’s version of the bill, which has already passed the House.

“I’m much more optimistic that [Spanberger] will sign,” Thomas says.

Thomas, who was not involved in shaping the moratorium in the Virginia house, thinks that a moratorium on data centers is much more likely to pass in states where the industry has less of a foothold than Virginia. Still, he says, “it’s not a bad idea.”



Source link

Continue Reading

Trending