Assistant Professor, Department of Biomedical and Chemical Engineering, College of Engineering and Computer Science, Syracuse University
A Solid Polymer Electrolyte from Cross-Linked Polytetrahydrofuran for Calcium Ion Conduction
Developing a solid-state calcium-ion battery that is a cheaper, more powerful, and environmentally safer alternative to lithium-ion batteries.
A Faculty Fellows award from SyracuseCoE funded supplies and equipment to produce and test a prototype electrolyte and demonstrate that it is extremely conductive. “We have integrated the solid electrolyte into a prototype calcium-ion battery, demonstrated that it works, and are currently focusing on improving it,” Hosein says. “We never could have done this without the ﬁnancial support from SyracuseCoE.”
Lithium-ion batteries are a popular energy technology due to lithium’s ability to store energy. Unfortunately, since lithium is mined in far-off places, it’s also expensive. And most lithium-ion batteries contain a liquid electrolyte that is ﬂammable. “There’s a drive to ﬁnd another ion that has the same energy density but is cheaper and more earth-abundant,” says Hosein.
Nuts and Bolts
Hosein has developed a battery using calcium—one of the most abundant elements in the world, which has double the charge of lithium—and replaced liquid electrolyte with a ﬂame-resistant solid. “It’s essentially a plastic that contains the calcium ions and facilitates transport from one electrode to the other,” he explains. However, because every ion is unique, so is the solid electrolyte required to conduct energy. “It takes a lot of development to get the right combination of calcium source and the right plastic composition to actually get something that’s conductive,” says Hosein.
Having a safer and more powerful battery is important for industries ranging from personal devices to transportation. “Everyone’s heard about cell phone batteries that explode,” says Hosein. “A big concern with electric cars is the battery. You’re driving around with about a gallon of ﬂammable liquid in there. If we can replace that with a nonﬂammable solid and we replace lithium with calcium, then we’re going to have a safer, better battery overall.”
Read more about the researchers in the SyracuseCoE Faculty Fellows Program.