grid resilience

CenterPoint reports progress on grid improvements ahead of 2025 hurricane season

CenterPoint Energy aims to complete its suite of grid resiliency projects before the 2025 hurricane season. Photo via centerpointenergy.com

As part of an ongoing process to make Houston better prepared for climate disasters, CenterPoint Energy announced its latest progress update on the second phase of the Greater Houston Resiliency Initiative (GHRI).

CenterPoint reported that it has completed 70 percent of its resiliency work and all GHRI-related actions are expected to be complete before the official start of the 2025 hurricane season.

"Our entire CenterPoint Houston Electric team is focused on completing this historic suite of grid resiliency actions before the start of hurricane season,” Darin Carroll, Senior Vice President of CenterPoint's Electric Business, said in a news release. “That is our goal, and we will achieve it. To date, we have made significant progress as part of this historic effort.”

CenterPoint’s resiliency solutions include clearing higher-risk vegetation across thousands of miles of power lines, adding thousands more automation devices capable of self-healing, installing thousands of storm-resistant poles, and undergrounding hundreds of miles of power lines.

CenterPoint's GHRI efforts, which entered a second phase in September 2024, aim to improve overall grid resiliency and reliability and are estimated to reduce outages for customers by more than 125 million minutes annually, according to the company. It has undergrounded nearly 350 miles of power lines, about 85 percent of the way toward its target of 400 miles, which will help improve resiliency and reduce the risk of outages. CenterPoint also aims to install the first of 100 new local weather monitoring stations by June 1.

In March, CenterPoint cleared 655 miles of high-risk vegetation near power lines, installed 1,215 automated reliability devices capable of self-healing, and added an additional 3,300 storm-resilient poles.

In April, CenterPoint will begin building a network of 100 new weather monitoring stations, which will provide 24/7 weather monitoring and storm response preparation.

“We will continue to work every day to complete these critical improvements as part of our company's goal of building the most resilient coastal grid in the country,” Carroll added in the release.

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A View From HETI

Rice's Atin Pramanik and a team in Pulickel Ajayan's lab shared new findings that offer a sustainable alternative to lithium batteries by enhancing sodium and potassium ion storage. Photo by Jeff Fitlow/Courtesy Rice University

A new study by researchers from Rice University’s Department of Materials Science and NanoEngineering, Baylor University and the Indian Institute of Science Education and Research Thiruvananthapuram has introduced a solution that could help develop more affordable and sustainable sodium-ion batteries.

The findings were recently published in the journal Advanced Functional Materials.

The team worked with tiny cone- and disc-shaped carbon materials from oil and gas industry byproducts with a pure graphitic structure. The forms allow for more efficient energy storage with larger sodium and potassium ions, which is a challenge for anodes in battery research. Sodium and potassium are more widely available and cheaper than lithium.

“For years, we’ve known that sodium and potassium are attractive alternatives to lithium,” Pulickel Ajayan, the Benjamin M. and Mary Greenwood Anderson Professor of Engineering at Rice, said in a news release. “But the challenge has always been finding carbon-based anode materials that can store these larger ions efficiently.”

Lithium-ion batteries traditionally rely on graphite as an anode material. However, traditional graphite structures cannot efficiently store sodium or potassium energy, since the atoms are too big and interactions become too complex to slide in and out of graphite’s layers. The cone and disc structures “offer curvature and spacing that welcome sodium and potassium ions without the need for chemical doping (the process of intentionally adding small amounts of specific atoms or molecules to change its properties) or other artificial modifications,” according to the study.

“This is one of the first clear demonstrations of sodium-ion intercalation in pure graphitic materials with such stability,” Atin Pramanik, first author of the study and a postdoctoral associate in Ajayan’s lab, said in the release. “It challenges the belief that pure graphite can’t work with sodium.”

In lab tests, the carbon cones and discs stored about 230 milliamp-hours of charge per gram (mAh/g) by using sodium ions. They still held 151 mAh/g even after 2,000 fast charging cycles. They also worked with potassium-ion batteries.

“We believe this discovery opens up a new design space for battery anodes,” Ajayan added in the release. “Instead of changing the chemistry, we’re changing the shape, and that’s proving to be just as interesting.”

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