Generally speaking, "nano-battery" refers to a nano-scale process, or an electrode with a nano-scale structure. The battery size is not in nanometers, and the University of Maryland brings a "real-name" nano-solid lithium battery. Although the size of the new battery is about the same size as the stamp, it is actually hidden in the dark, filled with millions of 3D microbattery, which can be said to be the world's smallest battery pack.
At first glance, each 3D microbattery is like a tall, round room with enough surface area to assemble the nano-cell layer, so the energy density and power density perform quite well under thin layer and high surface area addition, Maryland. The University of Energy Trends Research Center for Nanostructured Electrical Energy Storage (NEES) believes that 3D microbatteries will help move solid-state batteries from traditional flat films into 3D technology, which can store more energy in the same area, and power density can also be higher.
Lithium-ion battery is mainly composed of a positive electrode, a negative electrode and an electrolyte. Lithium ions migrate through the electrolyte between the two poles. If the contact area between the electrode and the electrolyte can be increased, the ion moving speed can be accelerated and the speed of reaching the other end electrode can be shortened. The higher the battery energy density, the more why many scientists want to build 3D batteries.
However, it is not easy to manufacture 3D batteries. Battery scientists have been working hard to improve power density and energy density through 3D battery design for 10 years. However, no research and test has ever been reported to enter the commercial threshold.
To further get the research out of the lab, NEES researchers first drilled holes in the silicon wafer that were thinner and deeper than the spider silk, and then through atomic-layer deposition, heating the material of each part of the battery. The electrode, the solid electrolyte and the Current Collector are plated in a single atomic film layer on the surface of the substrate and in the hole.
This approach ensures that every hole in the wafer is covered, increasing the surface area of the battery, while a thin battery layer increases power density. According to Keith Gregorczyk, an assistant research scientist at the University of Maryland, the study shows energy density and power density. Increased as the surface performance increases.
And the battery has a big advantage in that its electrolyte is solid, and it doesn't load flammable liquid electrolyte like traditional lithium-ion batteries. According to researcher Gary Rubloff, the technology process can be directly integrated into various devices like semiconductor chips. Whether it is a health sensor or a mobile phone can be applied.
From mobile phones, 3C products to electric vehicles or large energy storage power plants, lithium-ion batteries can be said to be ubiquitous. They are the mainstream of today's energy storage technology, but they have been criticized for their safety concerns. Create a safe and lightweight battery. The current research has been published in "ACS NANO".
