Taking a detailed look inside energy storage systems could help solve potential issues before they arise. A team of researchers from Brookhaven National Laboratory are doing just that by imaging the inner workings of a sodium-metal sulfide battery, leading them to understand the cause of degraded performance.

“We discovered that the loss in battery capacity is largely the result of sodium ions entering and leaving iron sulfide—the battery electrode material we studied—during the first charge/discharge cycle,” says Jun Wang, co-author of the study. “The electrochemical reactions involved cause irreversible changes in the microstructure and chemical composition of iron sulfide, which has a high theoretical energy density. By identifying the underlying mechanism limiting its performance, we seek to improve its real energy density.”

Performance degradation in charge/discharge cycles has been the main problem researchers encounter when pursuing sodium-ion battery research. While the battery’s performance points to degradation issues, not much was previously known about what caused this degradation.

(more…)

By: Carolyn Conner Seepersad, University of Texas at Austin

As millions of students of all ages return to school this fall, they are making important choices that have a strong influence on their eventual career path – which college majors to pursue, which high school classes to take, even which elementary school extracurricular activities to join. Many of them – especially women, girls and members of minority groups – make choices that lead them away from professions in the fields of science, technology, engineering and mathematics (STEM).

Women are just 13 percent of mechanical engineering undergraduate students. And women earn only 14.2 percent of doctorate degrees in mechanical engineering. More broadly, women make up 49 percent of the college-educated workforce, but only 14 percent of practicing engineers nationwide.

When these disparities persist, everyone suffers. Women miss out on opportunities in growing and highly paid occupations that require science and engineering skills. Furthermore, diverse design teams are more innovative and often avoid key flaws when designing products and systems with which we interact on a daily basis. Early airbags designed by primarily male design teams worked for adult male bodies, but resulted in avoidable deaths of female and child passengers. Early voice recognition systems failed to recognize female voices because they were calibrated for standard male voices.

How can we get more women into engineering fields, and help them stay for their whole careers? We need their insight and creativity to help solve the problems facing our world.

Options for action

Experts tell us that there are a variety of things that will help. For example, we need to encourage young girls to develop their spatial skills, laying the foundation for further scientific exploration as they grow.

We also need to find ways to help women feel less alone as they help us build a more inclusive engineering community. This includes hosting female-focused engineering interest groups on campuses and in workplaces, and highlighting engineering role models who reflect the true diversity of our population.

(more…)

By: Gary W. Hunter, Raed A. Dweik, Darby B. Makel, Claude C. Grisby, Ryan S. Mayes, and Cristian E. Davis

The advent of the Internet of Things suggests the potential for broad dissemination of information through a world of networked systems. An aspect of this paradigm is reflected in the concept of Smart Sensors Systems previously described in Interface: Complete self-contained sensor systems that include multi-parameter sensing, data logging, processing and analysis, self-contained power, and an ability to transmit or display information.

One application of Smart Sensor Systems is in the healthcare field. The concept of smart technologies that can monitor a patient’s health, assist in remote assessment by a health care provider, and improve the patient’s quality of life with limited intrusion and decreased costs is another aspect of a more interconnected world composed of distributed intelligent systems. One area where smart sensor systems may have a significant health care impact is in the area of breath analysis.

Breath analysis techniques offer a potential revolution in health care diagnostics, especially if these techniques can be brought into standard use. Of particular interest is the development of portable breath monitoring systems that can be used outside of a clinical setting, such as at home or during an activity. This article provides a brief overview of the motivation for breath monitoring, possible components of portable breath monitoring systems, and provides an example of this approach.

Read the full article in the winter 2016 edition of Interface.

By: Jonathan Coopersmith, Texas A&M University

Imagine if you could gas up your GM car only at GM gas stations. Or if you had to find a gas station servicing cars made from 2005 to 2012 to fill up your 2011 vehicle. It would be inconvenient and frustrating, right? This is the problem electric vehicle owners face every day when trying to recharge their cars. The industry’s failure, so far, to create a universal charging system demonstrates why setting standards is so important – and so difficult.

When done right, standards can both be invisible and make our lives immeasurably easier and simpler. Any brand of toaster can plug into any electric outlet. Pulling up to a gas station, you can be confident that the pump’s filler gun will fit into your car’s fuel tank opening. When there are competing standards, users become afraid of choosing an obsolete or “losing” technology.

Most standards, like electrical plugs, are so simple we don’t even really notice them. And yet the stakes are high: Poor standards won’t be widely adopted, defeating the purpose of standardization in the first place. Good standards, by contrast, will ensure compatibility among competing firms and evolve as technology advances.

My own research into the history of fax machines illustrates this well, and provides a useful analogy for today’s development of electric cars. In the 1960s and 1970s, two poor standards for faxing resulted in a small market filled with machines that could not communicate with each other. In 1980, however, a new standard sparked two decades of rapid growth grounded in compatible machines built by competing manufacturers who battled for a share of an increasing market. Consumers benefited from better fax machines that seamlessly worked with each other, vastly expanding their utility.

(more…)

There’s a lot of noise in our world today about separating fact from fiction. We are constantly bombarded with volumes of information and data—and we are challenged with what and who to believe?

But when it comes to electrochemistry and solid state sciences, and related fields, be assured that the ECS journals are a source that you can trust. For 115 years, ECS has been publishing high quality, peer-reviewed journals that contain work from YOU—renowned scientists, engineers, inventors, and Nobel Laureates. YOU also provide the high quality and knowledgeable peer review of manuscripts submitted for ECS journal consideration. From our meetings proceedings, ECS Transactions, to our journals, the Journal of the Electrochemical Society and the Journal of Solid State Science and Technology, we maintain rigorous standards that land our publications in the top ranked, most cited in the world.

ECS is also one of the only remaining independent, nonprofit society publisher of electrochemistry and solid state science and technology. With over 3.2 million full-text article downloads in 2016, we are seeing an increase in use of the ECS Digital Library since we have transitioned to hybrid open access, with the future goal to completely Free the Science, ensuring complete access to our entire body of knowledge.

We’re proud of this legacy and we thank you for the contributions that you’ve made to ECS publications through the years.

(more…)

From artificial limbs to cochlear implants, biomedical advancements are opening up new opportunities for health care. Now, researchers from the University of Delaware are working to further improve the lifetime and effectiveness of those biomedical devices by improving communication between the technology and neural tissue.

In order to improve the devices, researchers worked to develop a direct interfacing material to improve communication between the device and the body. For this, the team focused on a conjugated polymer known as PEDOT.

Video credit: Leah Dodd/ University of Delaware

This from University of Delaware:

Compared to other methods, surface modification through electro-grafting takes just minutes. Another advantage is that a variety of materials can be used as the conducting substrate, including gold, platinum, glassy carbon, stainless steel, nickel, silicon, and metal oxides.

Read the full article.

“Our results suggest that this is an effective means to selectively modify microelectrodes with highly adherent and highly conductive polymer coatings as direct neural interfaces,” says David Martin, lead researcher.

A team of researchers from Texas A&M University is looking to take the negative impact of excessive levels of carbon dioxide in the atmosphere and turn it into a positive with renewable hydrocarbon fuels.

Greenhouse gasses trap heat in the atmosphere and therefore impact global temperatures, making the planet warmer. Carbon dioxide, the most common greenhouse gas, is emitted into the atmosphere upon burning fossil fuels, solid waste, and wood products, and makes up 81 percent of all greenhouse gas emissions in the U.S.

“We’re essentially trying to convert CO2 and water, with the use of the sun, into solar fuels in a process called artificial photosynthesis,” says Ying Li, principal investigator and ECS member. “In this process, the photo-catalyst material has some unique properties and acts as a semiconductor, absorbing the sunlight which excites the electrons in the semiconductor and gives them the electric potential to reduce water and CO2 into carbon monoxide and hydrogen, which together can be converted to liquid hydrocarbon fuels.”

This from Texas A&M University:

The first step of the process involves capturing CO2 from emissions sources such as power plants that contribute to one-third of the global carbon emissions. As of yet, there is no technology capable of capturing the CO2, and at the same time re-converting it back into a fuel source that isn’t expensive. The material, which is a hybrid of titanium oxide and magnesium oxide, uses the magnesium oxide to absorb the CO2 and the titanium oxide to act as the photo-catalyst, generating electrons through sunlight that interact with the absorbed CO2 and water to generate the fuel.

(more…)

Sometimes the biggest advancements are the smallest in size.

A multidisciplinary team from Sandia National Laboratories recently demonstrated that notion by using nanoparticles and a nanoconfinement system to improve the performance of hydrogen storage materials. The researchers believe that this development is a step in the right direction to improve efficiency of hydrogen fuel cell electric vehicles.

Currently, hydrogen fuel cell electric vehicles store hydrogen as a high-pressure gas. However, the researchers argue that a solid material would be able to act like a sponge, with the ability to absorb and release hydrogen more efficiently. Using a hydrogen storage material of this nature could increase the amount of hydrogen able to be stored in a vehicle. In order to be efficient and competitive in the transportation sector, a hydrogen fuel cell electric vehicle would have to be able to travel 300 miles before refueling.

“There are two critical problems with existing sponges for hydrogen storage,” says Vitalie Stavila, co-author of the study and past ECS member. “Most can’t soak up enough hydrogen for cars. Also, the sponges don’t release and absorb hydrogen fast enough, especially compared to the 5 minutes needed for fueling.”

(more…)

ECS’s Electrochemical Energy Summit brings together policymakers and researchers from around the globe to discuss the ways in which science impacts the planet’s key sustainability issues. During the 232nd ECS Meeting, taking place October 1-6 in National Harbor, MD.

The 7th International ECS Electrochemical Energy Summit: Human Sustainability – Energy, Water, Food, and Health, is set to include three distinct symposia: Energy-Water Nexus; The Brain and Electrochemistry; and Sensors for Food Safety, Quality, and Security.

The deadline for abstract submission for the 232nd ECS Meeting is April 7. Submit today!

Energy-Water Nexus

The Energy-Water Nexus symposium, organized by ECS fellow Eric Wachsman, will focus on the connection between energy and water and emerging technologies that could improve access to clean, safe, and affordable resources across the globe. In addition to technical sessions ranging from membranes for water purification to fuel cells, the symposium will feature talks from members of federal agencies, such as the U.S. Department of Energy and the U.S. Department of Interior, to discuss funding opportunities.

(more…)

The peer review process is the heart of scholarly communication, assuring the publication of high-quality papers and strengthening the public’s perception of the science. Through peer review, editors, reviewers, and authors work together to ensure the work is coherent, rigorous, and adds to the scientific knowledge base.

However, peer review is not flawless. Namely, the labor intensive review-revise-resubmit process can be time consuming, potentially hampering scientific progress due to publication delay.

“Peer review is everything,” says Michael Hickner, member of the ECS Editorial Advisory Committee and professor at Pennsylvania State University. “However, it can be inefficient and sometimes mistakes happen, but it is our system. Peer review is our gold standard and a tradition of the academic community.”

To help combat some of the issues facing the peer review process today and further strengthen ECS’s manuscript review process, the Society has established the Editorial Advisory Committee to accelerate the peer review process and resolve discrepancies between reviewers on content quality.

“The core goal of the Editorial Advisory Committee is to lend expertise and perspective to the editors and associate editors,” Hickner says, who specializes in membranes for fuel cells and batteries. “I’m a technical consultant and I can weigh in on key papers; perhaps like a trusted super-reviewer.”

(more…)