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Self-charging power systems collecting energy harvesting technology and batteries are attracting extensive attention. To solve the disadvantages of the traditional integrated system, such as highly dependent on energy supply and complex structure, an air-rechargeable Zn battery based on MoS2/PANI cathode is reported. Benefited from the excellent conductivity desolvation shield of PANI, the MoS2/PANI cathode exhibits ultra-high capacity (304.98 mAh g−1 in N2 and 351.25 mAh g−1 in air). In particular, this battery has the ability to collect, convert and store energy simultaneously by an air-rechargeable process of the spontaneous redox reaction between the discharged cathode and O2 from air. The air-rechargeable Zn batteries display a high open-circuit voltage (1.15 V), an unforgettable discharge capacity (316.09 mAh g−1 and the air-rechargeable depth is 89.99%) and good air-recharging stability (291.22 mAh g−1 after 50 air recharging/galvanostatic current discharge cycle). Most importantly, both our quasi-solid zinc ion batteries and batteries modules have excellent performance and practicability. This work will provide a promising research direction for the material design and device assembly of the next-generation self-powered system.

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Aqueous zinc-ion batteries (AZIBs) with low cost and high safety are promising energy storage equipment for large-scale grids. However, the further development of AZIBs is obstructed by finite usability of cathode materials. Recently, layered materials represented by MoS 2 have attracted attentions because they can provide facile two-dimensional (2D) channels for the diffusion of Zn 2 + , but low capacity and poor rate capability limit their applications. Herein, two classical layered materials are combined to form a stable heterostructure (MoS 2 -rGO) by insitu growing metallic 1T-MoS 2 nanoflowers on reduced graphene oxide (rGO) to provide more 2D channels for electrons transfer and Zn 2 + diffusion. The MoS 2 -rGO heterostructure exhibits high specific capacity (303.10 mAh g À 1 at 0.20 A g À 1 ) and ultrahigh rate capability (102.70 mAh g À 1 at 20.00 A g À 1 , i. e., capacity retention of 33.88 % for a 100-fold increase in current density) in aqueous electrolyte. Furthermore, the quasi-solidstate aqueous zinc-ion battery based on MoS 2 -rGO heterostructure also shows high electrochemical performance at bending states and extreme temperature. This work provides an inspiration for construction of AZIBs with high-performance layered cathode.

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