Rice U. scientists map ways forward for lithium-ion batteries for extreme environments

July 26, 2017

Lithium-ion batteries are popular power sources for cellphones and other electronics, but problematic in extreme heat or cold. A Rice University laboratory has suggested ways to extend their range.

Rice materials scientist Pulickel Ajayan and members of his lab have published a review that analyzes recent progress in lithium-ion technology and suggests how to make the batteries more adaptable for challenging conditions. The work reviewed includes some of Ajayan and his team's own pioneering efforts to extend the capabilities of lithium-ion, the portable power storage of choice for consumer electronics, military applications, electric cars and more.

The review appears this week in Nature Energy.

Negative news about lithium-ion batteries in recent years has revolved around combusting cellphones and smoking aircraft batteries. But more common issues like the desire for batteries that last longer and charge more quickly are the prime drivers of research.

"We searched hard to find one paper that talks about all the problems at the same time and what all the individual components experience at extreme temperatures, and we couldn't find one," said Hemtej Gullapalli, a postdoctoral researcher at Rice and co-author of the paper. "So we believe this is a good opportunity to survey the field."

The Rice team was most interested in seeing how batteries perform in temperatures from minus 60 to 150 degrees Celsius (minus 76 to 302 degrees Fahrenheit), knowing that current batteries are designed to operate near room temperature and within a narrow temperature range. At best, lithium-ion batteries lean toward either hot or cold operations, which is less than optimal for an electric car driven from the hot desert to snowy peaks.

"People have not looked that studiously at temperature constraints," Gullapalli said. He noted how frustrating it can be when a phone shuts down in the cold or heat and said charging a phone also raises the temperature inside a battery -- which is why a phone should never be left recharging in a hot car.

"Most research involving batteries and temperatures involve management systems: For instance, if a phone is used in cold temperatures, they slow it down a little bit to preserve the battery," he said. "But we found in our review that the perspective is changing slightly. To make batteries that work from low to high temperatures, scientists have to take the materials perspective to see what temperature is specifically doing to the materials."

Electrochemical batteries have three basic components: A negative anode, a positive cathode and a conducting electrolyte that allows electrons to move from one side to the other, while either charging or draining. The materials in each offer opportunities, Gullapalli said.

"People have done amazing work," he said. "They've touched almost the whole periodic table and all the permutations and combinations have been tested. Now we're into the engineering phase where we know the materials' limitations and we are trying to break down the barriers."

The Rice team built a comprehensive map of both standard and promising new materials in commercial batteries and detailed their typical energy densities and temperature ranges for each component.

"We compared stabilities of materials with respect to each other and against a temperature scale," Ajayan said. "This will help researchers cherry-pick a required combination for their needs."

Performance in current lithium-ion batteries requires compromise, the researchers wrote. For example, water-based electrolytes like lead-acid and nickel-metal hydride operate only between minus 50 and 50 C, while molten salt batteries work fine only at temperatures above 90 C. Batteries with lithium thionyl chloride operate between minus 60 and 150 C, but only at peak between 20 and 55 C.

"Building an ideal or a close-to-ideal system requires a thorough understanding of the subtle mechanisms and replacing each delinquent component with a suitable alternative," Ajayan said. "A trivial component at ambient conditions can change the whole electrochemistry when exposed to high temperatures."
-end-
Co-authors of the paper are Rice postdoctoral associate Babu Ganguli, graduate students Marco-Tulio Rodrigues, Keiko Kato and Jarin Joyner; alumnus Kaushik Kalaga; and Fulbright postdoctoral fellow Farheen Sayed. Ajayan is chair of Rice's Department of Materials Science and NanoEngineering, the Benjamin M. and Mary Greenwood Anderson Professor in Engineering and a professor of chemistry.

Read the abstract at http://dx.doi.org/10.1038/nenergy.2017.108

This news release can be found online at http://news.rice.edu/2017/07/26/paper-details-developments-toward-high-temperature-batteries/

Follow Rice News and Media Relations via Twitter @RiceUNews

Related materials:

Battery components can take the heat: http://news.rice.edu/2016/04/11/battery-components-can-take-the-heat-2/

Clay makes better high-temp batteries: http://news.rice.edu/2015/11/09/clay-makes-better-high-temp-batteries/

Ajayan Group: http://ajayan.rice.edu

Rice Department of Materials Science and NanoEngineering: https://msne.rice.edu

Located on a 300-acre forested campus in Houston, Rice University is consistently ranked among the nation's top 20 universities by U.S. News & World Report. Rice has highly respected schools of Architecture, Business, Continuing Studies, Engineering, Humanities, Music, Natural Sciences and Social Sciences and is home to the Baker Institute for Public Policy. With 3,879 undergraduates and 2,861 graduate students, Rice's undergraduate student-to-faculty ratio is 6-to-1. Its residential college system builds close-knit communities and lifelong friendships, just one reason why Rice is ranked No. 1 for happiest students and for lots of race/class interaction by the Princeton Review. Rice is also rated as a best value among private universities by Kiplinger's Personal Finance. To read "What they're saying about Rice," go to http://tinyurl.com/RiceUniversityoverview.

Rice University

Related Rice Articles from Brightsurf:

C4 rice's first wobbly steps towards reality
An international long-term research collaboration aimed at creating high yielding and water use efficient rice varieties, has successfully installed part of the photosynthetic machinery from maize into rice.

Rice has many fathers but only two mothers
University of Queensland scientists studied more than 3000 rice genotypes and found diversity was inherited through two maternal genomes identified in all rice varieties.

Rice rolls out next-gen nanocars
Rice University researchers continue to advance the science of single-molecule machines with a new lineup of nanocars, in anticipation of the next international Nanocar Race in 2022.

3D camera earns its stripes at Rice
The Hyperspectral Stripe Projector captures spectroscopic and 3D imaging data for applications like machine vision, crop monitoring, self-driving cars and corrosion detection.

Climate change could increase rice yields
Research reveals how rice ratooning practices can help Japanese farmers increase rice yields.

Breeding new rice varieties will help farmers in Asia
New research shows enormous potential for developing improved short-duration rice varieties.

High-protein rice brings value, nutrition
A new advanced line of rice, with higher yield, is ready for final field testing prior to release.

Rice plants engineered to be better at photosynthesis make more rice
A new bioengineering approach for boosting photosynthesis in rice plants could increase grain yield by up to 27 percent, according to a study publishing January 10, 2019 in the journal Molecular Plant.

Can rice filter water from ag fields?
While it's an important part of our diets, new research shows that rice plants can be used in a different way, too: to clean runoff from farms before it gets into rivers, lakes, and streams.

Rice plants evolve to adapt to flooding
Although water is essential for plant growth, excessive amounts can waterlog and kill a plant.

Read More: Rice News and Rice Current Events
Brightsurf.com is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to Amazon.com.