A team of engineers led by 94-year-old John Goodenough, professor from the Cockrell School of Engineering on the University of Texas at Austin and co-inventor of your 18650 lithium battery, has continued to evolve the first all-solid-state battery cells that might lead to safer, faster-charging, longer-lasting rechargeable batteries for handheld cellular devices, 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 possesses an extensive cycle life (life of the battery) having a high volumetric energy density and fast rates of charge and discharge. The engineers describe their new technology in the recent paper published in the journal Energy & Environmental Science.
“Cost, safety, energy density, rates of charge and discharge and cycle life are crucial for battery-driven cars to be more widely adopted. We know our discovery solves a lot of the problems that are built into today’s batteries,” Goodenough said.
They demonstrated that their new battery cells have at the very least 3 x all the energy density as today’s lithium-ion batteries. A battery cell’s energy density gives a power vehicle its driving range, so an increased energy density implies that a vehicle can drive more miles between charges. The UT Austin battery formulation also enables a greater variety of charging and discharging cycles, which equates to longer-lasting batteries, as well as a faster rate of recharge (minutes instead of hours).
Today’s lithium-ion batteries use liquid electrolytes to transport the lithium ions in between the anode (the negative side of your battery) and also the cathode (the positive side in the battery). If energy battery is charged too rapidly, you can get dendrites or “metal whiskers” to form and cross from the liquid electrolytes, causing a short circuit that can bring about explosions and fires. As opposed to liquid electrolytes, they count on glass electrolytes which allow 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 – increases the energy density of your 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, for the reason that solid-glass electrolytes can operate, or have high conductivity, at -20 degrees Celsius, this sort of battery in a car could perform well in subzero degree weather. This dexkpky82 the first 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 claimed that Goodenough brought an awareness of your composition and properties from the solid-glass electrolytes that resulted in a whole new version of the electrolytes that may be 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 as well as the anode side without dendrites, which simplifies battery cell fabrication.
Another advantage is the battery cells can be made from earth-friendly materials.
“The glass electrolytes provide for the substitution of low-cost sodium for lithium. Sodium is obtained from seawater which is accessible,” Braga said.
Goodenough and Braga are continuing to advance their 18650 battery pack and are concentrating on several patents. For the short term, they hope to work with battery makers to develop and test their new materials in electric vehicles as well as storage devices.