Park Ho-seok of Chemical Engineering developed an all-solid secondary battery that can be freely bent or cut
- 공과대학
- Hit4411
- 2021-01-24
Park Ho-seok, a joint research team from the Department of Chemical Engineering/Polymer Engineering, developed an all-solid secondary battery that can be freely bent or cut.
South Korean researchers have developed an all-solid secondary battery that works even if it is bent or cut freely. The secondary cell battery if exposed in the air inside the stable operation of the very stable, researchers explained. It is evaluated as a technology that will increase the degree of freedom in producing and designing wearable electronic devices because it can be freely transformed into secondary batteries.
The Korea Basic Science Support Institute (KBSI) announced on the 13th that Dr. Kim Hae-jin's team of the Ministry of Materials and Analysis developed a solid secondary battery that can be safely and freely modified through joint research with the Korea Chemical Research Institute, Sungkyunkwan University, Chonnam National University and Inha University.
All solid secondary batteries with 100£h/g capacity, which are manufactured to check their performance, maintained 90% of their capacity even after 500 charging and discharging and 1,000 bending tests were tested. In addition, batteries that are thin with a thickness of less than 1mm worked normally even in extreme deformation such as crumpling or cutting.
It also has the advantage that all solid secondary batteries developed this time can be produced using the existing secondary battery manufacturing process. The researchers expect that commercialization of all solid secondary batteries will be easier through cooperation with real-demand companies.
This solid secondary battery consists of solid, not liquid, electrolytes that can flow electric energy between the cathode and the anode. Secondary batteries that use conventional liquid electrolytes have a risk of explosion because they leak out of the battery even if they have only a small groove.
The entire solid secondary battery developed by the researchers does not need a separation membrane that separates the anode from the anode, but also works stably even if the battery is cut or the battery's outer pouch is opened to expose the inside to the air.
Dr. Kim Hae-jin said, "Explosion and fire accidents of existing secondary batteries stem from liquid electrolytes, and through this fusion study, we have secured the technology to manufacture next-generation free-form full-solid secondary batteries that are safe."
In order to develop whole-solid secondary batteries, researchers secured material technology by developing new materials for anode and cathode materials, whole house, and solid polymer electrolyte and improving performance of existing materials at the same time. In particular, it has developed a composite electrode technology that can move lithium-ion smoothly to the inside of the electrode and a cell assembly technology that can minimize surface resistance. We also have a pouch-type full-cell full-solid secondary battery manufacturing technology to apply it to a large area and an additive technology to connect a number of single cells in series or in parallel within a cell stack.
The researchers evaluated that the free deformation of the battery is possible despite the large area of single cells, which is the result of advances in conventional solid secondary battery technology. Because it can make large capacity and high voltage, it is essential for developing high-performance solid secondary batteries.
Dr. Kim Hae-jin said, "This technology can replace existing technologies that will reach performance limits within the next 10 years, and it can be applied to wearable electronics, drones, and large secondary batteries used in electric vehicles, so it will act as a game changer for the future secondary battery industry."
In this joint research, KBSI was in charge of research projects and was in charge of developing anode materials and assembling all solid secondary batteries. Dr. Kim Dong-wook of the Institute of Chemistry and Professor Ji-ho Ji-ho of Inha University have developed solid polymeric electrolyte materials. Professors Park Ho-seok and Son Sung-wook of Sungkyunkwan University and Jeon Young-si of Chonnam National University were in charge of developing cathode materials and developing flexible collections.
The study was conducted as a creative convergence research project by the National Science and Technology Research Association, and KBSI was the organizer and conducted the study for five years from 2015. In the first three years of the first phase, companies participated in securing key element technologies, including material development, and in the second phase, companies participated in research on core technologies for producing and practicalizing solid secondary batteries. During the research process, 65 SCI-level papers were published, including 46 patent applications (including eight overseas cases) and 21 patent registrations (including three overseas cases).