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Band-type Flexible Li Primary and Secondary Batteries
H. M. So(소혜미),H. H. Ha(하현호),S. M. Hyun(현승민) Korean Society for Precision Engineering 2021 한국정밀공학회 학술발표대회 논문집 Vol.2021 No.11월
As the demand for wearable devices such as smart watches increases rapidly, a change in power supply suitable for this is required. Currently, most power sources are still rigid and have limited deformation, which is rather inconvenient to apply to the human body. Many studies on flexible batteries to solve this problem have been reported, and among them, an one-dimensional batteries will be highly compatible wearable battery that can be woven into various fabrics due to its flexibility and ease of integration with fibers. In this study, we fabricated band-type lithium primary and secondary batteries and analyzed their electrochemical properties. The manufactured band-type lithium secondary battery is flexible and has excellent initial capacity, but it has been confirmed that the capacity decreases when charging and discharging are repeated. Unlike the conventional coin cell or pouch cell in which the cell components and assembly equipment are standardized, this is believed to be because that the band-type lithium secondary battery has a large aspect ratio and high water vapor transmission rate (WVTR) of the packing material. However, if the assembly process is optimized and suitable packaging materials are secured, 1-D fiber batteries can be expanded into flexible power fibers through weaving.