Safety concerns regarding lithium-ion batteries have been making headlines in light of smartphone fires and hoverboard explosions. In order to combat safety issues, at team of researchers from Drexel University, led by ECS member Yury Gogotsi, has developed a way to transform a battery’s electrolyte solution into a safeguard against the chemical process that leads to battery fires.

Dendrites – or battery buildups caused by the chemical reactions inside the battery – have been cited as one of the main causes of lithium-ion battery malfunction. As more dendrites compile over time, they can breach the battery’s separator, resulting in malfunction.

(MORE: Read more research by Gogotsi in the ECS Digital Library.)

As part of their solution to this problem, the research team is using nanodiamonds to curtail the electrochemical deposition that leads to the short-circuiting of lithium-ion batteries. To put it in perspective, nanodiamond particles are roughly 10,000 times smaller than the diameter of a single hair.

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In its first Science for Solving Society’s Problems Challenge, ECS partnered with the Bill & Melinda Gates Foundation to leverage the brainpower of electrochemists and solid state scientists, working to find innovative research solutions to some of the world’s most pressing issues in water and sanitation. A total of seven projects were selected, resulting in a grand total of $360,000 in funding.

The researchers behind one of those projects recently published an open access paper in the Journal of The Electrochemical Society discussing their results in pursuing a single-use, biodegradable and sustainable battery that minimizes waste. The paper, “Evaluation of Redox Chemistries for Single-Use Biodegradable Capillary Flow Batteries,” was published August 18 and authored by Omar Ibrahim, Perla Alday, Neus Sabaté, Juan Pablo Esquivel (pictured with prototype at right), and Erik Kjeang.

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By: Timothy H. Dixon, University of South Florida

This summer I worked on the Greenland ice sheet, part of a scientific experiment to study surface melting and its contribution to Greenland’s accelerating ice losses. By virtue of its size, elevation and currently frozen state, Greenland has the potential to cause large and rapid increases to sea level as it melts.

When I returned, a nonscientist friend asked me what the research showed about future sea level rise. He was disappointed that I couldn’t say anything definite, since it will take several years to analyze the data. This kind of time lag is common in science, but it can make communicating the issues difficult. That’s especially true for climate change, where decades of data collection may be required to see trends.

A recent draft report on climate change by federal scientists exploits data captured over many decades to assess recent changes, and warns of a dire future if we don’t change our ways. Yet few countries are aggressively reducing their emissions in a way scientists say are needed to avoid the dangers of climate change.

While this lack of progress dismays people, it’s actually understandable. Human beings have evolved to focus on immediate threats. We have a tough time dealing with risks that have time lags of decades or even centuries. As a geoscientist, I’m used to thinking on much longer time scales, but I recognize that most people are not. I see several kinds of time lags associated with climate change debates. It’s important to understand these time lags and how they interact if we hope to make progress.

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In May 2017 during the 231st ECS Meeting, we sat down with Doron Aurbach, professor at Bar-Ilan University in Israel, to discuss his life in science, the future of batteries, and scientific legacy. The conversation was led by Rob Gerth, ECS’s director of marketing and communications.

During the 231st ECS Meeting, Aurbach received the ECS Allen J. Bard Award in Electrochemical Science for his distinguished contributions to the field. He has published more than 540 peer-reviewed papers, which have received more than 37,000 citations. Doron serves as a technical editor for the Journal of The Electrochemical Society and is an ECS fellow. His work in fundamental battery research has received recognition world-wide.

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Batteries made of lemons and oranges have been gracing grade school laboratories for years. In addition to fruit-based batteries, now you can make a battery using spit.

The new paper-based bacteria-powered battery can be activated with a single drop of saliva, generating enough power to power an LED light for around 20 minutes.

“The battery includes specialized bacterial cells, called exoelectrogens, which have the ability to harvest electrons externally to the outside electrode,” Seokheun Choi, co-author of the new study, tells Nexus Media. “For the long-term storage, the bacterial cells are freeze-dried until use. This battery can even be used in challenging environmental conditions like desert areas. All you need is an organic matter to rehydrate and activate the freeze-dried cells.”

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In an effort to expand South Australia’s renewable energy supply, the state has looked to business magnate Elon Musk to build the world’s largest lithium-ion battery. The goal of the project is to deliver a grid-scale battery with the ability to stabilize intermittency issues in the area as well as reduce energy prices.

An energy grid is the central component of energy generation and usage. By changing the type of energy that powers that grid in moving from fossil fuels toward more renewable sources, the grid itself changes. Traditional electrical grids demand consistency, using fossil fuels to control production for demand. However, renewable sources such as wind and solar provide intermittency issues that traditional fossil fuels do not. Researchers must look at how we can deliver energy to the electrical grid when the sun goes down or the wind stops blowing. This is where energy storage systems, such as batteries, play a pivotal role.

In South Australia, Musk’s battery is intended to sustain 100 megawatts of power and store that energy for 129 megawatt hours. To put it in perspective, that is enough energy to power 30,000 homes and, according to Musk, will be three times as powerful as the world’s current largest lithium-ion battery.

Musk hopes to complete the project by December, stating that “It’s a fundamental efficiency improvement to the power grid, and it’s really quite necessary and quite obvious considering a renewable energy future.”

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Instead of batteries, a new cell phone harvests the few microwatts of power it needs from a different source: ambient radio signals or light.

Researchers were also able to make Skype calls using the battery-free phone, demonstrating that the prototype—made of commercial, off-the-shelf components—can receive and transmit speech and communicate with a base station.

“We’ve built what we believe is the first functioning cell phone that consumes almost zero power,” says Shyam Gollakota, an associate professor of computer science & engineering at the University of Washington and coauthor of the paper.

“To achieve the really, really low power consumption that you need to run a phone by harvesting energy from the environment, we had to fundamentally rethink how these devices are designed.”

Researchers eliminated a power-hungry step in most modern cellular transmissions—converting analog signals that convey sound into digital data that a phone can understand. This process consumes so much energy that it’s been impossible to design a phone that can rely on ambient power sources.

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In an effort to develop a more affordable, plentiful alternative to lithium-ion batteries, researchers from Purdue University are pursuing rechargeable potassium based batteries, demonstrating a way to derive carbon for battery electrodes from old tires.

“With the growth of rechargeable batteries for electronic devices, electric vehicles and power grid applications, there has been growing concern about the sustainability and cost of lithium,” says Vilas G. Pol, an associate professor in the Davidson School of Chemical Engineering at Purdue University and former member of ECS. “In the last decade, there has been rapid progress in the investigation of metal-ion batteries beyond lithium, such as sodium and potassium.”

Researchers in the field believe that potassium based batteries show potential for large-scale grid storage due to their low cost and the abundance of the element itself.

“The intermittent energy generated from solar and wind requires new energy storage systems for the grid,” Pol says. “However, the limited global availability of lithium resources and high cost of extraction hinder the application of lithium-ion batteries for such large-scale energy storage. This demands alternative energy storage devices that are based on earth-abundant elements.”

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Researchers from Argonne National Laboratory and Oregon State University have developed new cathode architecture for lithium-sulfur batteries. The team, led by ECS member Khalil Amine, incorporated graphene and sulfide nanoparticles to improve electrical conductivity in the promising lithium-sulfur batteries.

Lithium-sulfur batteries hold major promise as researchers explore the range of energy storage technologies. With an extremely high theoretical energy density, these batteries have the potential to store up to five times as much energy as today’s best lithium-ion battery.

But there are barriers preventing that theoretical density from becoming an actual density. Namely, the discharge products of sulfur electrodes and cycling intermediates produced.

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Using energy stored in the batteries of electric vehicles to power large buildings not only provides electricity for the building, but also increases the lifespan of the vehicle batteries, new research shows.

Researchers have demonstrated that vehicle-to-grid (V2G) technology can take enough energy from idle electric vehicle (EV) batteries to be pumped into the grid and power buildings—without damaging the batteries.

This new research into the potentials of V2G shows that it could actually improve vehicle battery life by around ten percent over a year.

For two years, Kotub Uddin, a senior research fellow at the University of Warwick’s Warwick Manufacturing Group, and his team analyzed some of the world’s most advanced lithium ion batteries used in commercially available EVs—and created one of the most accurate battery degradation models existing in the public domain—to predict battery capacity and power fade over time, under various aging acceleration factors—including temperature, state of charge, current, and depth of discharge.

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