Aqueous zinc-ion batteries (AZIBs) are promising candidates for practical energy storage due to their superior energy density, nontoxicity, and environmental friendliness. However, it is still a tremendous quest to seek an outstanding cathode material to reach a splendid rate property as well as stable long-term cycle property. Herein, we present a self-template method to synthesize NH4V4O10 with a decussate structure and the intercalation mechanism via a simple one-step hydrothermal method, which delivers a prominent mass energy density of 332.25 W h kg–1, excellent rate performance, and a stable long-time cycle. Attributing to its specific decussate morphology consisting of vast vertical nanobelts and the intercalation of NH4 + with hydrogen bonding between ammonium ions and vanadium oxide layers as a “pillar” in the V2O5 host, the NH4V4O10 electrode material can effectively prevent structural collapse as well as promote the rate of electronic diffusion in the de­(intercalation) process of Zn2+. Importantly, the materials not only deliver 243 and 221.4 mA h g–1 (98.7 and 90% retention of initial discharge capacity of 246 mA h g–1, respectively) in 1480 cycles and 2100 cycles, respectively, at 5 A g–1 but also maintain a specific capacity of 417.35 mA h g–1 at 0.1 A g–1 in the 150th cycle, which delivers a superior property compared with the previously reported metal-intercalated V2O5. Therefore, this work provides the direction to choose and design a novel cathode material with a peculiar morphology and admirable performance for AZIBs and other secondary batteries.

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Main observation and conclusion Exploration of advanced anode materials for sodium‐ion batteries (SIBs) is still a big challenge due to the large radius of sodium. In this work, the hierarchical architectures assembled from N‐doped carbon‐coated Co0.5Ni0.5Se2 (Co0.5Ni0.5Se2@NC) nanoparticles encapsulated into cross‐stacked nanosheets have been successfully prepared from the cobalt‐nickel binary‐metal organic frameworks (CoNi‐MOF) by two steps of the solid‐state selenization and carbon coating processes. Importantly, the resultant hierarchical Co0.5Ni0.5Se2@NC architecture can achieve a satisfactory electrochemical performance, maintaining a high‐rate capacity of 330 mA·h·g–1 at 3 A·g–1 and a stable cyclability of 100 cycles without obvious capacity decay at 0.2 A·g–1. The design of distinct superstructure can not only be applied to other electrode materials but also boost the forward development of energy storage systems.

Investigation on rechargeable potassium-ion batteries (PIBs) has been revitalized owing to the unique characteristics of abundant reserves and comparable energy density over lithium-ion batteries (LIBs), which holds huge potential for...

In this paper, an innovative hierarchical NiCoS4@ReS2 heterostructure has been successfully constructed by anchoring ReS2 nanosheet arrays on hollow NiCoS4 nanocubes, in which the heterointerface coupling effect can facilitate the...