A team of engineers led by 94-year-old John Goodenough, professor inside the Cockrell School of Engineering with the University of Texas at Austin and co-inventor of your 18650 lithium battery, has created the first all-solid-state battery cells that can lead to safer, faster-charging, longer-lasting rechargeable batteries for handheld smart phones, electric cars and stationary energy storage.
Goodenough’s latest breakthrough, completed with Cockrell School senior research fellow Maria Helena Braga, is really a low-cost all-solid-state battery which is noncombustible and it has a long cycle life (battery life) with a high volumetric energy density and fast rates of charge and discharge. The engineers describe their new technology inside a recent paper published within the journal Energy & Environmental Science.
“Cost, safety, energy density, rates of charge and discharge and cycle life are crucial for battery-driven cars to become more widely adopted. We know our discovery solves most of the issues that are inherent in today’s batteries,” Goodenough said.
They demonstrated their new battery cells have at least thrice as much energy density as today’s lithium-ion batteries. Battery power cell’s energy density gives an electric vehicle its driving range, so a higher energy density implies that an automobile can drive more miles between charges. The UT Austin battery formulation also permits a larger quantity of charging and discharging cycles, which equates to longer-lasting batteries, in addition to a faster rate of recharge (minutes as opposed to hours).
Today’s lithium-ion batteries use liquid electrolytes to move the lithium ions between the anode (the negative side of the battery) and the cathode (the positive side in the battery). If energy storage companies is charged too quickly, it may cause dendrites or “metal whiskers” to make and cross with the liquid electrolytes, creating a short circuit that can result in explosions and fires. As an alternative to liquid electrolytes, the researchers depend upon glass electrolytes that enable using an alkali-metal anode with no formation of dendrites.
The application of an alkali-metal anode (lithium, sodium or potassium) – which isn’t possible with conventional batteries – boosts the energy density of the cathode and offers a long cycle life. In experiments, the researchers’ cells have demonstrated a lot more than 1,200 cycles with low cell resistance.
Additionally, since the solid-glass electrolytes can operate, or have high conductivity, at -20 degrees Celsius, this type of battery in the vehicle could work well in subzero degree weather. This dexkpky82 the 1st all-solid-state battery cell that will operate under 60 degree Celsius.
Braga began developing solid-glass electrolytes with colleagues while she was at the University of Porto in Portugal. About two years ago, she began collaborating with Goodenough and researcher Andrew J. Murchison at UT Austin. Braga mentioned that Goodenough brought a preliminary understanding from the composition and properties of your solid-glass electrolytes that resulted in a new version of your electrolytes which is now patented from the UT Austin Office of Technology Commercialization.
The engineers’ glass electrolytes permit them to plate and strip alkali metals on both the cathode and the anode side without dendrites, which simplifies battery cell fabrication.
An additional advantage would be that the battery cells can be done from earth-friendly materials.
“The glass electrolytes permit the substitution of low-cost sodium for lithium. Sodium is taken from seawater which is widely accessible,” Braga said.
Goodenough and Braga are continuing to succeed their 18650 battery pack and so are focusing on several patents. In the short term, they hope to work with battery makers to build up and test their new materials in electric vehicles and energy storage devices.