Hexagonal MoO3 is proposed as an intercalation anode as a potential replacement for Zn metal plates for the first time.

We present a general approach to prepare metal/aerogel nanocomposites via template directed atomic layer deposition (ALD). In particular, we used a Ru ALD process consisting of alternating exposures to bis(cyclopentadienyl)ruthenium (RuCp2) and air at 350 °C to deposit metallic Ru nanoparticles on the internal surfaces of carbon and silica aerogels. The technique does not affect the morphology of the aerogel template and offers excellent control over metal loading by simply adjusting the number of ALD cycles. We also discuss the limitations of our ALD approach and suggest ways to overcome these.

This work reports a significant electrochemical performance enhancement (especially the rate performance and cycling stability) by adopting a freestanding V2O5/CNT composite paper (VCP) as the ZIB cathode.

is proposed as a promising cathode material for rechargeable aqueous Zn ion battery. • The Zn/Bi 2 S 3 battery shows a reversible capacity of 161 mAh g −1 at 0.2 A g −1 and good cyclic stability of up to 100 cycles with ca. 100% retention. • The storage mechanism in the Bi 2 S 3 cathode is related to the reversible Zn ion intercalation/extraction reactions and the capacitive contribution. ABSTRACT Aqueous Zn ion batteries (ZIBs) are promising in energy storage due to the low cost, high safety, and material abundance. The development of metal oxides as the cathode for ZIBs is limited by the strong electrostatic forces between O 2− and Zn 2+ which leads to poor cyclic stability. Herein, Bi 2 S 3 is proposed as a promising cathode material for rechargeable aqueous ZIBs. Improved cyclic stability and fast diffusion of Zn 2+ is observed. Also, the layered structure of Bi 2 S 3 with the weak van der Waals interaction between layers offers paths for diffusion and occupancy of Zn 2+. As a result, the Zn/Bi 2 S 3 battery delivers high capacity of 161 mAh g −1 at 0.2 A g −1 and good cycling stability up to 100 cycles with ca. 100% retention. The battery also demonstrates good cyclic performance of ca. 80.3% over 2000 cycles at 1 A g −1. The storage mechanism in the Bi 2 S 3 cathode is related to the reversible Zn ion intercalation/extraction reactions and the capacitive contribution. This work indicates that Bi 2 S 3 shows great potential as the cathode of ZIBs with good performance and stability.

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