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Unlocking the potential of commercial carbon nanofibers as free-standing positive electrodes for flexible aluminum ion batteries
- Hu, Yuxiang, Debnath, Shaikat, Hu, Han, Luo, Bin, Zhu, Xiaobo, Wang, Songcan, Hankel, Marlies, Searles, Debra J., Wang, Lianzhou
- Journal of materials chemistry A 2019 v.7 no.25 pp. 15123-15130
- aluminum, batteries, carbon nanofibers, electrodes, energy, energy density, storage technology
- Rechargeable aluminum-ion batteries (AIBs) are one of the most attractive next-generation energy storage technologies. Here, we report new edge-rich graphitic nanoribbon interconnected nanocup stacks as positive electrodes for AIBs by cleaving commercial carbon nanofibers. AIBs with an exceptionally high rate capacity (above 95 mA h g⁻¹ at a high current density of 50 A g⁻¹) and high energy density (214 W h kg⁻¹) are achieved. Moreover, the binder-free and freestanding electrode presents a negligible capacity decay after 20 000 cycles at a current density of 10 A g⁻¹. This report highlights the potential of a new practical carbon-based positive electrode for scalable and flexible AIBs.