What Is The Strongest Battery – It has successfully equipped a flexible display system with batteries, a microcontroller and Bluetooth modules. Again, the battery outperformed commercially available Li coin cells. Credit: University of California San Diego
A research team has developed a flexible, rechargeable silver oxide zinc battery with a surface energy density five to 10 times greater than state-of-the-art technology. The battery is also easier to manufacture; While most flexible batteries have to be manufactured in sterile conditions, under vacuum, this can be screen printed under normal laboratory conditions. The device can be used in flexible, stretchable electronics for wearables and soft robots.
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The team of researchers from the University of California San Diego and California-based company ZPower detailed their findings in the December 7, 2020 issue of the journal Joule.
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“Our batteries can be designed around electronics rather than electronics designed around batteries,” said Lu Yin, one of the first authors and a doctoral student. Student in the research group of UC San Diego professor of nanoengineering Joseph Wang.
The field capacity of this innovative battery is 50 milliamps per square centimeter at room temperature – 10-20 times the field capacity of a typical lithium-ion battery. Thus, for the same surface area, the battery, expressed in joules, can provide 5 to 10 times more power.
“This kind of surface capacity has never been achieved before,” Yinsaid said. “Our production method is affordable and scalable.”
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The field capacity of this innovative battery is 50 milliamps per square centimeter at room temperature – 10-20 times the field capacity of a typical lithium-ion battery. Thus, for the same surface area, the battery, expressed in joules, can provide 5 to 10 times more power. Credit: University of California San Diego
The new battery has a higher capacity than any of the flexible batteries currently on the market. This is because the battery has a much lower impedance – the resistance of an electrical circuit or device to alternating current. The lower the impedance, the better the battery performance against high current discharge.
“As the 5G and Internet of Things (IoT) market grows rapidly, this battery powering commercial products and high-power wireless devices will be a major competitor as the next generation power source for consumer electronics,” said Jonathan Scharf. told the newspaper. — PhD candidate in the research group of first author UC San Diego professor of nanoengineering Ying Shirley Meng.
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It has successfully equipped a flexible display system with batteries, a microcontroller and Bluetooth modules. Again, the battery outperformed commercially available Li coin cells.
The printed battery cells have been charged for more than 80 cycles without showing any sign of significant loss of capacity. The cells also remained functional despite repeated bending and twisting.
“Our core focus was on improving battery performance and the manufacturing process,” said Ying Shirley Meng, director of UC San Diego’s Institute for Materials Discovery and Design and one of the paper’s corresponding authors.
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To create the battery, the researchers used a proprietary cathode design and chemistry from ZPower. Wang and his team contributed their expertise in printable, stretchable sensors and stretchable batteries. Meng and colleagues provided their expertise in advanced characterization for electrochemical energy storage systems and characterized each iteration of the battery prototype until peak performance was achieved. Recipe for better performance
The battery’s extraordinary energy density is due to its silver oxide-zinc (AgO-Zn) chemistry. Most commercial flexible batteries use an Ag2O-Zn chemistry. As a result, they often have limited cycle life and low capacity. This limits their use to low-power, disposable electronics.
AgO is traditionally considered unstable. But ZPower’s AgO cathode material relies on a proprietary lead oxide coating to improve AgO’s electrochemical stability and conductivity.
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As an added benefit, the AgO-Zn chemistry is responsible for the battery’s low impedance. Battery-printed current collectors also have excellent conductivity, which helps to achieve lower impedance. Improved production
However, AgO has never been used in screen printing batteries before, as it is highly oxidative and degrades rapidly chemically. By testing different solvents and binders, researchers in Wang’s lab at UC San Diego were able to find an ink formulation that makes AgO suitable for printing. As a result, the battery can print just a few seconds after the inks are primed. Dry and ready to use in minutes. The battery can also be printed in a roll-to-roll process, increasing speed and making production scalable.
The batteries are printed on a polymer film with a high melting point (about 200 degrees C or 400 degrees Fahrenheit) that is chemically stable, elastic, and heat-sealable. Current collectors, zinc anode, AgO cathode, and corresponding separators all form a screen-printed layer on top of each other.
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The team is working on a next-generation battery targeting cheaper, faster and lower impedance chargers used in 5G devices and soft robots that require high power, customizable and flexible form factors.
Reference: Lu Yin, Jonathan Scharf, Jessica Ma, Jean-Marie Doux, Christopher Redquest, Viet L. Le, Yijie Yin, Jeff Ortega, Xia Wei, Joseph Wang and “High Performance Printed AgO-Zn Rechargeable Battery for Flexible Electronics” Ying Shirley Meng, 7 December 2020,
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“This battery is a beast. It’s our most powerful battery designed for the most powerful aircraft,” explains Van Winter, manager of market development for True Blue Power. “Ideal for larger Part 135, 29 and 25 aircraft that need higher amp-hours for longer emergency and backup power,” Winter said.
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The TB60 saves up to 50 pounds per battery, significantly reducing the curb weight of the aircraft and increasing the payload. True Blue Power picture
The TB60 is certified to TSO-C179b, RTCA DO-311A, RTCA DO-160G, and RTCA DO-178C Design Assurance Level A. The battery provides superior reliability and performance and is maintenance under conditions. The result is zero capacity controls and reduced maintenance costs by up to 90 percent. It is ideal for use in rugged environments and outperforms any other aircraft battery in extreme temperatures from -40°C to 70°C.
For more information on the new TB60 Advanced Lithium-Ion battery, contact Erik Ritzman, vice president of True Blue Power, at 316-630-0101 or visit truebluepowerusa.com.
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