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Abstract The overall performance of dual‐ion batteries (DIBs) is strongly linked to anions storage properties of cathodes. Whereas high energy/power densities and stabilities for DIBs are limited by cathodes. To overcome these barriers, we have designed a novel fluoridized‐polyaniline‐H + /carbon nanotubes (FPHC) as cathode for high‐efficiency PF 6 − storage. F − in PF 6 − is easy to form covalent bond with H on −NH− in FPHC, so that PF 6 − can stably coordinate with FPHC, showing a symmetrical structure. FPHC cathode shows a highly reversible capacity of 73 mAh g −1 at 2 A g −1 after 2000 cycles, which provides a solid base for the advanced sodium dual‐ion batteries (SDIBs) (310 Wh kg −1 /7720 W kg −1 ). Besides, the relative pouch‐type SDIB can drive a vacuum cleaner model with an electric machine. This work may shed light on an up‐and‐coming strategy of robust cathodes for SDIBs.
Sun et al. (Fri,) studied this question.