Abstract
AbstractNa2Ti3O7 (NTO) is a potential anode material with low discharge voltage for room‐temperature sodium‐ion batteries. In this work, NTO nanotubes were prepared by a hydrothermal method. XRD, SEM, TEM, and HRTEM studies are performed to investigate the composition, morphology, and structure. As anodes for sodium‐ion batteries, NTO nanotubes show a reversible capacity of 126.2 mAh g−1 at 100 mA g−1. The discharge capacity can still reach 109 mAh g−1 even for 2000 cycles. Solid‐state sodium‐ion batteries containing NTO‐nanotube anodes and an Na3Zr2Si2PO12 solid electrolyte display a comparable performance to batteries with a liquid electrolyte. Moreover, the prepared solid‐state sodium battery is also demonstrated to store mechanical energy harvested by triboelectric nanogenerators (TENGs). The discharge capacity reaches 121 mAh g−1 at 5 mA g−1.
Published Version
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