Layered transition metal dichalcogenides (TMDs) are promising candidates for aqueous zinc-based batteries owing to the large interlayer distance. Nevertheless, the low specific capacity of unmodified TMDs due to the high binding energy between host materials and carriers in electrolytes hinder their further development. Herein, a simple method to incorporate oxygen is reported to enhance the specific capacity of MoSe 2 . The in situ and ex situ characterization results confirm that the oxygen incorporated MoSe 2 experiences proton-dominated insertion electrochemistry during cycling. In addition, the theoretical calculation results demonstrate that the oxygen atoms with high electronegativity can effectively reduce the binding energy of adsorbing H + and change charge distribution in the interlayer. As a result, incorporating oxygen significantly promotes H + adsorption and diffusion, and thus greatly increases the specific capacity of MoSe 2 . This study provides an effective strategy to facilitate the kinetics of TMDs, and thus achieve highperformance aqueous zinc-based batteries.

Electrochemical batteries and supercapacitors are considered ideal rechargeable technologies for next‐generation energy storage systems. The key to further commercial applications of electrochemical energy storage devices is the design and investigation of electrode materials with high energy density and significant cycling stability. Recently, amorphous materials have attracted a lot of attention due to their more defects and structure flexibility, opening up a new way for electrochemical energy storage. In this perspective, we summarize the recent research regarding amorphous materials for electrochemical energy storage. This review covers the advantages and features of amorphous materials, the synthesis strategies to prepare amorphous materials, as well as the application and modification of amorphous electrodes in energy storage fields. Finally, the challenges and prospective remarks for future development in amorphous materials for electrochemical energy storage are concluded.

Lithium-ion batteries (LIBs) have achieved a triumph in the market of portable electronic devices since their commercialization in the 1990s due to their high energy density. However, safety issue originating from the flammable, volatile, and toxic organic liquid electrolytes remains a long-standing problem to be solved. Alternatively, composite solid electrolytes (CSEs) have gradually become one of the most promising candidates due to their higher safety and stable electrochemical performance. However, the uniform dispersity of ceramic filler within the polymer matrix remains to be addressed. Generally, all-solid-state lithium metal batteries without any liquid components suffer from poor interfacial contact and low ionic conductivity, which seriously affect the electrochemical performance. Here we report a CSE consisting of lithium bis(trifluoromethanesulfonyl)imide (LiTFSI), polydopamine (PDA) coated Li 6.4 La 3 Zr 1.4 Ta 0.6 O 12 (LLZTO) (denoted as PDA@LLZTO) microfiller, polyacrylonitrile (PAN), and poly(vinylidene fluoride-co-hexafluoropropylene) (PVDF-HFP). Introducing only 4 μL of liquid electrolyte at the electrode|electrolyte interface, the CSE-based cells exhibit high ionic conductivity (0.4 × 10 −3 S cm −1 at 25 °C), superior cycle stability, and excellent thermal stability. Even under low temperatures, the impressive electrochemical performance (78.8% of capacity retention after 400 cycles at 1 C, 0 °C, and decent capacities delivered even at low temperature of −20 °C) highlights the potential of such quasi-solid-state lithium metal batteries as a viable solution for the next-generation high-performance lithium metal batteries.

A flexible, binder free electrode composed of 2D ultrathin (≈2.5 nm) SnO nanoflake arrays on GF/CNTs foam is described by Minghua Chen, Jianyi Lin, Ze Xiang Shen, and co‐workers in article number 1606232. DFT calculations, quantitative capacitive analysis, ex‐situ Raman spectroscopy, and HRTEM verify the pseudocapacitive contribution to high rate Na+ storage and long‐term cycle life of sodium ion batteries.