3D printing technology that can manufacture 18650 battery lithium ion 2200mah of any shape is launched

　　18650 battery lithium ion 2200mah power smartphones and tablets, e-cigarettes and electric cars, and until now, manufacturers had to design their devices around standard battery sizes, and it limited design options and capacity for consumer devices. But researchers led by Christopher Reyes and Benjamin Wiley have developed a new 3D printing method that can print 18650 battery lithium ion 2200mah in almost any shape.

　　Lithium-ion battery: is a secondary battery (rechargeable battery) that relies primarily on the movement of lithium ions between the positive and negative electrodes to work. During the charge and discharge process, Li+ intercalates and deintercalates back and forth between the two electrodes: during charging, Li+ is deintercalated from the positive electrode and embedded in the negative electrode through the electrolyte, and the negative electrode is in a lithium-rich state; during discharge, the opposite is true. Batteries generally use materials containing lithium as electrodes and are representatives of modern high-performance batteries.

　　Most 18650 battery lithium ion 2200mah on the market are rectangular or cylindrical in shape. In theory, 3D printing technology can print entire devices in almost any shape, including batteries, structures and electronic components. However, the problem holding back fully 3D printed 18650 battery lithium ion 2200mah is that the polymers used for 3D printing, such as poly(lactic acid) (PLA), are not ionic conductors. The researchers wanted to find a way to print complete 18650 battery lithium ion 2200mah using low-cost and widely available fused filament fabrication (FFF) 3D printers.

　　In order to improve the ionic conductivity of PLA, the researchers infused PLA used for 3D printing into an electrolyte solution. In addition, they incorporated graphene or multi-walled carbon nanotubes into the anode or cathode, respectively, to help improve the battery's conductivity. To demonstrate the battery's potential, the researchers 3D printed an LED bracelet with an integrated lithium-ion battery. And the bracelet battery can power the green LED for about 60 seconds.

　　The team pointed out that the capacity of the first generation of 3D printed batteries is about two orders of magnitude lower than that of commercial batteries, and the actual usage rate of commercial batteries is too low. Future work may include developing methods to increase the capacity of 3D printed batteries, such as "replacing polymer-based anode and cathode materials with 3D printable slurries that can accommodate high loadings of active materials and can be printed in tandem with polymer separators, using Alternative nanomaterials, such as reduced graphene oxide, may serve as both conductive fillers and active materials, eliminating the need for inactive conductive materials and low-conductivity active materials.

　　Including the active materials, LTO and LMO, using conductive fillers before mixing in the polymer can improve the electrical contact when the active materials are present in low concentrations in the polymer. These results should help those seeking to create energy storage materials and devices that can be 3D printed to make batteries in arbitrary shapes.

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