Bipolar Prussian blue analogues electrodes for symmetric aqueous batteries in diverse scenarios

•Bipolar Prussian blue analogues (PBAs) materials were used to construct symmetric aqueous batteries (SABs), meanwhile the phase transition of PBAs was inhibited.•The constructed symmetric cells exhibited polarity invertible capability which benefits battery life extension and misoperation tolerance.•This symmetric battery model as a universal strategy has been successfully extended to fibrous SABs, low-temperature SABs and seawater SABs, satisfying diverse scenarios.