Lithium ion batteries (LIBs) are the most popular energy storage for various fields such as electronics, motilities, and power devices. In the recent years, LIBs demand higher energy density for improving device performance such as weight saving, miniaturization and low cost. In this study, we propose the two solutions for their improvement: 1. Using active materials having higher energy density than conventional one. 2. Removing the non-active materials such as conductive agent, binder, separator, electrolyte by self-standing the active materials. Previously, iron oxide/carbon composite nanofibers were reported for these two solutions. Figure 1 shows a schematic diagram of the self-stand composite nanofiber electrode for lithium ion battery.<br/>In addition to improving the high energy density, the electrode exhibited high cycle durability as shown in Figure 2: cyclic charge and discharge curves of electrodes with different capacitance. In general, high capacity electrodes have low cycle durability due to high volume changes. However, these results indicates that the all samples have been stable against cycle test regardless of the capacity.<br/>Furthermore, we investigated the influence of carbonization temperature, and press treatment of the iron oxide/carbon composite nanofibers to improve these electrochemical characteristics.

Electrochemical characteristics of the self-standing iron oxide/carbon composite electrospun nanofibers

253rd National Meeting (2017)

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