OFWeek 3D Print Network News: Even if you are not entirely an electronic expert, anyone who has been involved in 3D printing projects has noticed that electronic devices are shrinking at an alarming rate. Case Study: The Arduino platform and the Raspberry Pi computer are getting smaller and smaller, and they can be easily embedded into any handheld device. However, how to put these small things down into the battery without losing power supply is still very complicated and limited, which explains why all microchip spy devices and micro medical implant devices are still not implemented.

But when we talk about this now, it means there is still a lot of room to overcome this deadlock, which seems to have been done by scientists at the University of Illinois at Urbana-Champaign. These scientists have used unusual 3D printing techniques to create a super-small battery that can be used to power those tiny chips that are available. What is their secret? Combining 3D holographic lithography with 2D lithography creates a single fabrication technique that is almost comparable to photocuring 3D printing at very small levels. In summary, holographic lithography is used to define the 3D structure of a cell, followed by 2D lithography to create a continuous layer of material. The result is? A 3D electrode shape is formed.

Their lithium-ion batteries made with this technology can easily generate a current of 0.5 mA or enough to power a LED. However, it can be easily used throughout the microelectronics and medical industries, especially as tin bodies will have a good life expectancy. Professor Paul Brown, a professor at the School of Materials Science and Engineering at the University of Illinois at Urbana-Champaign, said, "This 3D microbattery has excellent performance and scalability, and we believe it will play an important role in many applications. Due to miniaturized energy storage Depending on the technology, micro-scale devices typically use off-chip power. A miniaturized high-energy and high-power on-chip battery will achieve high expectations in applications such as autonomous micro-scale actuators, distributed wireless sensors and transmitters, and surveillance. And portable and implantable medical devices."

The research results will be published in the Proceedings of the National Academy of Sciences on the topic of "High Performance On-Chip 3D Lithium Ion Micro Battery Holographic Structure". Ning Hailong graduate student, the first author of this article, explained that, in essence, they combined different concepts of manufacturing expertise to make batteries. “This work combines key concepts in manufacturing, characterization, and modeling,” he said. “The energy and power of microbatteries are closely related to the structural parameters of the electrodes, such as size, shape, surface area, porosity, and distortion. A significant advantage of the new approach is that these parameters can be easily controlled during lithography, providing unique flexibility for designing next-generation on-chip energy storage devices."

The batteries they create have well-defined, periodic structured porous electrodes that function essentially like a supercapacitor to enable rapid transfer of electrons and ions inside the cell. Professor John Rogers, who participated in the project, said, "Although the precise control of the interference beam requires the construction of 3D holographic lithography, recent advances have significantly simplified the required optics, enabling a single incident beam and standard photoresist. Agent processing creates structures. This makes microfabrication highly scalable and compatible."

People have high expectations for these interesting 3D printed batteries, just as they are used in the medical industry. Unfortunately, we have to wait a few more years for a marketable battery version that seems to be included in a tiny 3D printing project.

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