| Affiliation: | 1. Tianmu Lake Institute of Advanced Energy Storage Technologies, Liyang 213300, Jiangsu, China;2. Yangtze River Delta Physics Research Center, Liyang 213300, Jiangsu, China;3. Key Laboratory for Renewable Energy, Beijing Key Laboratory for New Energy Materials and Devices, Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China;4. University of Chinese Academy of Sciences, Beijing 100049, China;5. Nano Science and Technology Institute, University of Science and Technology of China, Suzhou 215123, China |
| Abstract: | Solvent-free dry-film technology has attracted wide attention due to its ability to avoid pollution/waste caused by poisonous organic solvents, as well as its advantage for energy density enhancement, electrochemical performance improvement and electrode–electrolyte interface compatibility. However, a summary of the research advancements and technology development in this field is still missing. To fill this gap, a complete overview of the technical advantages, development process, principal mechanisms and application fields of solvent-free dry film technology is presented here. Firstly, the history of solvent-free dry-film technology is introduced, followed by detailed discussions on different types of dry-film making methods. Moreover, powder spray and binder fibrillation are emphasized as key methods due to their low-cost mass-production capability, with an elaboration on the associated preparation process including principle, procedure, and parameters. Both patents from the industry and research papers from the academy of the aforementioned two methods are analyzed/summarized for complete information, whose technical advantages are found to be suitable for all solid-state batteries (ASSBs). Based on the insights obtained above, perspectives are given for promoting future development of solvent-free dry-film technology. |
