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

Houston researchers make headway on developing low-cost sodium-ion batteries

energy storage

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.”

Tesla is expected to bring a 'megafactory' to Brookshire.

Tesla targets Houston area for $200 million 'mega' battery factory

Tesla Town

Tesla is expected to bring a “megafactory” and 1,500 manufacturing jobs to the Houston area.

According to various news reports this week, Tesla intends to spend $200 million on a facility in Brookshire, Texas. The Waller County Commissioners Court approved tax abatements on March 5 for the new plant.

“We are super excited about this opportunity—1,500 advanced manufacturing jobs in the county and in the city," Waller County Precinct 4 Commissioner Justin Beckendorff said during Wednesday’s Commissioners Court meeting.

Tesla will lease two buildings in Brookshire's Empire West Business Park. According to documents from Waller County, Tesla will add $44 million in facility improvements. In addition, it will install $150 million worth of manufacturing equipment.

As part of the deal, Tesla will invest in property improvements that involve a 600,000-square-foot, $31 million manufacturing facility that will house $2 million worth of equipment and include improvements to the venue.

The facility will produce Tesla megapacks, which are powerful batteries to provide energy storage and support, according to the company. A megapack can store enough energy to power about 3,600 homes for one hour.

Tesla can receive a 60 percent tax abatement for 10 years. According to the tax abatement agreement, Tesla has to employ at least 1,500 people by 2028 in order to be eligible for the tax break.

In addition to the employment clause, Tesla also will be required to have a minimum of $75 million in taxable inventory by January 1, 2026, which will increase to $300 million after three years.

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This story originally appeared on our sister site, InnovationMap.

Houston renewables company Proteus Power is getting acquired. Photo via

Dallas-area business to acquire Houston renewable energy co.

M&A moves

Houston-based developer of utility-scale renewable energy Proteus Power is being acquired by JBB Advanced Technologies for an undisclosed amount after founder, chairman, and CEO, John B. Billingsley signed a letter of intent to purchase.

"I know the potential of renewable energy, both for our country and for the small landowners and communities we work with," Billingsley says in a news release. "Proteus Power is just the type of company I have known and grown in the past, and we're perfectly positioned to make it a very profitable company for our investors. In the near term, this very substantial business will provide a multi-billion-dollar boost to the Texas economy, from Lubbock to Midland, across West Texas and down to the Gulf Coast."

Proteus Power currently incorporates a total of 15.5 gigawatts of utility-scale renewable energy projects, which include utility-scale solar and battery energy storage systems. Nearly 5 gigawatts of both utility-scale solar and battery energy storage should be developed at an estimated EPC (Engineering, Procurement, and Construction) cost of $3.38 billion over the next four years.

Proteus Power projects also include multiple independent system operators: ERCOT West, ERCOT Houston, ERCOT North, ERCOT South, Miso LA/MS, Miso Illinois, Miso Texas, and SPP South.

Billingsley, who launched one of the nation's largest renewable energy companies, Tri Global Energy, with the purchase of Proteus Power, continues JBB’s efforts for “clean, affordable solar energy systems to commercial concerns” according to the company.

Proteus Power headquarters in Houston will move to JBB Advanced Technologies' headquarters in Carrollton, Texas, with all current employees being retained, pending the final acquisition, which is expected in the fourth quarter of 2024.A branch office is also planned to be located in Lubbock, Texas.

"The Proteus Power development team is clearly among the best in the renewable industry today," Billingsley adds. "The company has thrived under the leadership of Chief Development Officer Dan Phillips, and we at JBBAT are fortunate to inherit such a strong team to work with us as we move forward to jump back in the energy transition."

Jupiter Power's Callisto I is up and running. Photo courtesy of jupiterpower.io

Houston clean energy storage facility goes online to power ERCOT grid

green light

A new battery energy storage facility in Houston is officially up and running to power the ERCOT grid with a supply of reliable, zero emissions power.

Jupiter Power announced the commercial operations launch of its 400-megawatt-hour battery facility, Callisto I, in central Houston on the site of the former HL&P H.O. Clarke fossil fuel power plant.

"Jupiter couldn't be prouder about bringing the Callisto I project online," Andy Bowman, CEO of Jupiter Power, says in a news release. "This project responds to lawmakers' calls to increase affordable and dispatchable new generation in an area where people need more power. Callisto I is the first energy storage project at this scale in the City of Houston and will help meet Houston's growing power needs while also increasing resiliency from extreme weather events."

The new project is Jupiter Power's ninth project to deliver energy storage to ERCOT — bringing its total ERCOT fleet to 1,375-megawatt-hour capacity — but its the first in the Houston area. The company is currently developing over 11,000 megawatts of projects across the country. Founded in 2017, Jupiter Power is headquartered in Austin and has offices in Houston and Chicago.

"The announcement of Jupiter Power's Callisto I Energy Storage project is significant and exciting for the region, as it's the first large-scale transmission-connected energy storage project in the City of Houston," Jane Stricker, senior vice president at the Greater Houston Partnership and executive director at the Houston Energy Transition Initiative, adds. "This critical project will help address peak power demand and is another great example of our region's leadership in scaling and deploying impactful solutions for an all the above energy future."

Among the company's financial backers is Houston-based EnCap Energy Transition, which invested in Jupiter Power via its Fund II.

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Guest column: How growing energy demand will impact the Texas grid

Guest Column

Although Texas increased its power supply by 35% over the last four years, a recent report from ERCOT predicts that Texas’ energy demand will nearly double by 2030, with power supply projected to fall short of peak demand in a worst-case scenario beginning in summer 2026. There are many factors and variables that could either increase or decrease the grid’s stability.

Homebuilding in Texas

One of the most easily identifiable challenges is that the population of Texas is continuing to grow, which places greater demand on the state’s power grid. With its booming population, the state is now the second most populous in the country.

In 2024, Texas led the nation in homebuilding, issuing 15% of the country's new-home permits in 2024. Within the first two months of 2025, Houston alone saw more than 11,000 new building permits issued. The fact that Houston is the only major metro in the United States to lack zoning laws means it does not directly regulate density or separate communities by use type, which is advantageous for developers and homebuilders, who have far fewer restrictions to navigate when constructing new homes.

Large-scale computing facilities

Another main source of the growing demand for power is large-scale computing facilities such as data centers and cryptocurrency mining operations. These facilities consume large amounts of electricity to run and keep their computing equipment cool.

In 2022, in an effort to ensure grid reliability, ERCOT created a program to approve and monitor these large load (LFL) customers. The Large Flexible Load Task Force is a non-voting body that develops policy recommendations related to planning, markets, operations, and large load interconnection processes. LFL customers are those with an expected peak demand capacity of 75 megawatts or greater.

It is anticipated that electricity demand from customers identified by ERCOT as LFL will total 54 billion kilowatt-hours (kWh) in 2025, which is up almost 60% from the expected demand in 2024. If this comes to fruition, the demand from LFL customers would represent about 10% of the total forecast electricity consumption on the ERCOT grid this year. To accommodate the expected increase in power demand from large computing facilities, the state created the Texas Energy Fund, which provides grants and loans to finance the construction, maintenance, modernization, and operation of electric facilities in Texas. During this year’s 89th legislative session, lawmakers approved a major expansion of the Texas Energy Fund, allocating $5 billion more to help build new power plants and fund grid resilience projects.

Is solar power the key to stabilizing the grid?

The fastest-growing source of new electric generating capacity in the United States is solar power, and Texas stands as the second-highest producer of solar energy in the country.

On a regular day, solar power typically constitutes about 5% of the grid’s total energy output. However, during intense heat waves, when the demand for electricity spikes and solar conditions are optimal, the share of solar power can significantly increase. In such scenarios, solar energy’s contribution to the Texas grid can rise to as much as 20%, highlighting its potential to meet higher energy demands, especially during critical times of need.

While the benefits of solar power are numerous, such as reducing greenhouse gas emissions, lowering electricity bills, and promoting energy independence from the grid, it is important to acknowledge its barriers, such as:

  • Sunlight is intermittent and variable. Cloudy days, nighttime, and seasonal changes can affect energy production, requiring backup or storage solutions. Extreme weather conditions, such as hailstorms, can damage solar panels, affecting their performance and lifespan.
  • The upfront costs of purchasing and installing solar panels and associated equipment can be relatively high.
  • Large-scale solar installations may require significant land area, potentially leading to concerns about land use, habitat disruption, and conflicts with agricultural activities.
  • Integrating solar power into existing electricity grids can pose challenges due to its intermittent nature. Upgrading and modifying grids to handle distributed generation can be costly.

Although Texas has made progress in expanding its power supply, the rapid pace of population growth, homebuilding, and large-scale computing facilities presents challenges for grid stability. The gap between energy supply and demand needs to continue to be addressed with proactive planning. While solar power is a promising solution, there are realistic limitations to consider. A diversified approach that includes both renewable and traditional energy sources, along with ongoing legislative movement, is critical to ensuring a resilient energy future for Texas.

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Sam Luna is director at BKV Energy, where he oversees brand and go-to-market strategy, customer experience, marketing execution, and more.

Enbridge activates first solar power project in Texas

power on

Canadian energy company Enbridge Inc., whose gas transmission and midstream operations are based in Houston, has flipped the switch on its first solar power project in Texas.

The Orange Grove project, about 45 miles west of Corpus Christi, is now generating 130 megawatts of energy that feeds into the grid operated by the Electric Reliability Council of Texas (ERCOT). ERCOT supplies electricity to 90 percent of the state.

Orange Grove features 300,000 solar panels installed on more than 920 acres in Jim Wells County. Construction began in 2024.

Telecom giant AT&T has signed a long-term power purchase agreement with Enbridge to buy energy from Orange Grove at a fixed price. Rather than physically acquiring this power, though, AT&T will receive renewable energy certificates. One renewable energy certificate represents the consumption of one megawatt of grid power from renewable energy sources such as solar and wind.

“Orange Grove is a key part of our commitment to develop, construct, and operate onshore renewable projects across North America,” Matthew Akman, executive vice president of corporate strategy and president of renewable power at Enbridge, said in 2024.

Orange Grove isn’t Enbridge’s only Texas project. Enbridge owns the 110-megawatt Keechi wind farm in Jacksboro, about 60 miles northwest of Fort Worth, and the 249.1-megawatt Chapman Ranch wind farm near Corpus Christi, along with a majority stake in the 203.3-megatt Magic Valley I wind farm near Harlingen. The company’s 815-megawatt Sequoia solar project, east of Abilene, is scheduled to go online in early 2026. Enbridge has signed long-term power purchase agreements with AT&T and Toyota North America for energy produced by Sequoia.

During a recent earnings call, Enbridge President and CEO Greg Ebel said that given the “unprecedented demand for power generation across North America,” driven largely by explosive growth in the data center sector, the company expects to unveil more renewable energy projects.

“The policy landscape for renewables is dynamic,” Ebel said, “but we think we are well-positioned with our portfolio of late-stage (projects).”

Houston's Rhythm Energy expands nationally with clean power acquisition

power deal

Houston-based Rhythm Energy Inc. has acquired Inspire Clean Energy for an undisclosed amount. The deal allows Rhythm to immediately scale outside of Texas and into the Northeast, Midwest and mid-Atlantic regions, according to a release from the company.

Inspire offers subscription-based renewable electricity plans to customers in Pennsylvania, New York, New Jersey, Massachusetts, Ohio, Delaware, Illinois, Maryland, and Washington, D.C. By combining forces, Rhythm will now be one of the largest independent green-energy retailers in the country.

“Adding Inspire to the Rhythm family gives us the geographic reach to serve millions of new customers with the highly rated customer experience Texans already enjoy,” PJ Popovic, CEO of Rhythm, said in the release. “Together we become one of the largest independent green-energy retailers in the country and can roll out innovations like our PowerShift Time-of-Use plan and device-enabled demand-response programs that put customers fully in control of their energy costs.”

Rhythm was founded by Popovic in 2020 and offers 100 percent renewable energy plans using solar power, wind power and other renewable power sources.

In addition to scaling geographically, the acquisition will "(marry) Rhythm's data-driven technology with Inspire's successful subscription model." Rhythm also plans to upgrade its digital tools and provide more advanced services to help lower clean energy costs, according to the release.

Popovic spoke with EnergyCapital in 2023 about where he thinks renewables fit into Texas’s energy consumption. Read more here.