A team of engineers led by 94-year-old John Goodenough, professor in the Cockrell School of Engineering at The University of Texas at Austin and co-inventor of the 18650 lithium battery, has evolved the initial all-solid-state battery cells that may lead to safer, faster-charging, longer-lasting rechargeable batteries for handheld mobile phones, electric cars and stationary energy storage.
Goodenough’s latest breakthrough, completed with Cockrell School senior research fellow Maria Helena Braga, is a low-cost all-solid-state battery that may be noncombustible and has a long cycle life (battery) with a high volumetric energy density and fast rates of charge and discharge. The engineers describe their new technology in the recent paper published within the journal Energy & Environmental Science.
“Cost, safety, energy density, rates of charge and discharge and cycle life are critical for battery-driven cars to be more widely adopted. We think our discovery solves a lot of the conditions that are built into today’s batteries,” Goodenough said.
They demonstrated that the new battery cells have at the very least 3 times as much energy density as today’s lithium-ion batteries. Battery power cell’s energy density gives a power vehicle its driving range, so a higher energy density ensures that an auto can drive more miles between charges. The UT Austin battery formulation also enables an increased number of charging and discharging cycles, which equates to longer-lasting batteries, and also a faster rate of recharge (minutes as opposed to hours).
Today’s lithium-ion batteries use liquid electrolytes to transport the lithium ions involving the anode (the negative side of your battery) along with the cathode (the positive side from the battery). If lithium battery storage is charged too quickly, you can get dendrites or “metal whiskers” to make and cross throughout the liquid electrolytes, causing a short circuit that can cause explosions and fires. As an alternative to liquid electrolytes, the researchers count on glass electrolytes which allow the application of an alkali-metal anode with no formation of dendrites.
The usage of an alkali-metal anode (lithium, sodium or potassium) – which isn’t possible with conventional batteries – raises the energy density of your cathode and delivers a long cycle life. In experiments, the researchers’ cells have demonstrated more than 1,200 cycles with low cell resistance.
Additionally, as the solid-glass electrolytes can operate, or have high conductivity, at -20 degrees Celsius, this sort of battery in the vehicle could work well in subzero degree weather. This dexkpky82 the 1st all-solid-state battery cell that could operate under 60 degree Celsius.
Braga began developing solid-glass electrolytes with colleagues while she was on the University of Porto in Portugal. About 2 yrs ago, she began collaborating with Goodenough and researcher Andrew J. Murchison at UT Austin. Braga claimed that Goodenough brought a knowledge of your composition and properties from the solid-glass electrolytes that ended in a brand new version from the electrolytes that is certainly now patented throughout the UT Austin Office of Technology Commercialization.
The engineers’ glass electrolytes allow them to plate and strip alkali metals on the cathode and also the anode side without dendrites, which simplifies battery cell fabrication.
Another advantage is the battery cells can be produced from earth-friendly materials.
“The glass electrolytes permit the substitution of low-cost sodium for lithium. Sodium is obtained from seawater that may be widely available,” Braga said.
Goodenough and Braga are continuing to advance their 18650 battery pack and they are focusing on several patents. In the short term, they hope to work alongside battery makers to develop and test their new materials in electric vehicles and energy storage devices.