As microfabrication techniques stepped into the millimeter and sub-sub-millimeter scale world, a large amount of microelectronics has been developed and even commercialized. Microbatteries are considered as the important components to continuously power microelectronics without interruption. Over past few decades, a great deal of research have been devoted into the development of microbatteries with high energy density, long cycling life and minimum footprint area. These researches mainly focus on the fabrication procedure, which contributes to reducing the footprint area. However, the battery chemistry investigation and optimization are always ignored, which have great impact on the microbatteries performances. How to take the battery chemistry into account when shrinking the size of microbatteries is a huge challenge. To take up the challenge, applying the energy-dense materials into the three-dimensional microstructures could be a direct strategy. Among different three-dimensional microstrucutres, Swiss-roll microtube was proven as an effective way to improve the energy density without influencing the electrochemical kinetics. As for the material choice, the Zn-MnO2 aqueous system with high theoretical capacity and safe working environment is a good candidate for microbatteries. More importantly, fabrication and modification of both the electrode and electrolyte is compatible with standard microfabrication process in the atmosphere. Based on this, Zn anode is modified by a photolithgraphable electrolyte with small-molecular stabilizer, while the MnO2 cathode is modified by the zincophilic binder. Then the Swiss-roll three-dimensional structure is elaborately designed through the strain-engineering rolled-up technology to accommodate the energy-dense and highly reversible materials. As the results, the gap between bulky and microscale batteries is successfully bridged.
| Identifer | oai:union.ndltd.org:DRESDEN/oai:qucosa:de:qucosa:92379 |
| Date | 10 July 2024 |
| Creators | Qu, Zhe |
| Contributors | Schmidt, Oliver G., Zhang, Kai, Technische Universität Chemnitz |
| Source Sets | Hochschulschriftenserver (HSSS) der SLUB Dresden |
| Language | English |
| Detected Language | English |
| Type | info:eu-repo/semantics/acceptedVersion, doc-type:doctoralThesis, info:eu-repo/semantics/doctoralThesis, doc-type:Text |
| Rights | info:eu-repo/semantics/openAccess |
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