Researchers develop sodium-ion micro-batteries for 3D printing

Chinese researchers have developed a prototype of 3D-printed flexible planar sodium-ion micro-batteries (NIMBs) with ultra-high areal capacity and accelerated throughput capability, according to a research paper recently published in the journal Advanced Materials.

Chinese researchers have developed a prototype of 3D-printed flexible planar sodium-ion micro-batteries (NIMBs) with ultra-high areal capacity and accelerated throughput capability, according to a research paper recently published in the journal Advanced Materials. According to a research article recently published in the journal Advanced Materials. Planar NIMBs are a promising new micronutrient source due to their rich sodium resources, low cost, and rapid transmission of sodium ions. But they are hampered by a low surface capacity due to the fine microelectrodes. Researchers from the Dalian Institute of Chemical Physics of chinese academy of sciences developed 3D printable inks with appropriate viscosities and high conductivity.

The material allows NIMB microelectrode multi-layer printing to reach a very high thickness of approximately 1,200 micrometers while maintaining efficient ion and electron transfer pathways. 3D Printed Sodium-Ion Micro Batteries, 3D printed NIMBs offer a superior areal capacity of 4.5 mAh per square centimeter at a low current density of 2 mA per square centimeter, outperforming hand-printed micro batteries. state-of-the-art technology, said the research article. The new NIMBs feature improved throughput capacity with 3.6 mAh per square centimeter at a high current density of 40 mA per square centimeter and a robust long-term cycle life of up to 6,000 cycles. Additionally, planar NIMB microelectrodes exhibit decent mechanical flexibility under various bending conditions.

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