Piezoelectric 1T Phase MoSe ₂ Nanoflowers and Crystallographically Textured Electrodes for Enhanced Low‐Temperature Zinc‐Ion Storage

Abstract

Transition metal dichalcogenides (TMDs) are regarded as promising cathode materials for zinc‐ion storage owing to their large interlayer spacings. However, their capabilities are still limited by sluggish kinetics and inferior conductivities. In this study, a facile one‐pot solvothermal method is exploited to vertically plant piezoelectric 1T MoSe ₂ nanoflowers on carbon cloth (CC) to fabricate crystallographically textured electrodes. The self‐built‐in electric field owing to the intrinsic piezoelectricity during the intercalation/deintercalation processes can serve as an additional piezo‐electrochemical coupling accelerator to enhance the migration of Zn ²⁺. Moreover, the expanded interlayer distance (9–10 Å), overall high hydrophilicity, and conductivity of the 1T phase MoSe ₂ also promoted the kinetics. These advantages endow the tailored 1T MoSe ₂/CC nanopiezocomposite with feasible Zn ²⁺ diffusion and desirable electrochemical performances at room and low temperatures. Moreover, 1T MoSe ₂/CC‐based quasi‐solid‐state zinc‐ion batteries are constructed to evaluate the potential of the proposed material in low‐temperature flexible energy storage devices. This work expounds the positive effect of intrinsic piezoelectricity of TMDs on Zn ²⁺ migration and further explores the availabilities of TMDs in low‐temperature wearable energy‐storage devices.