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Bimetallic transition metal chalcogenides (TMCs) materials have emerged as attractive anodes for lithium‐ion batteries (LIBs) and sodium‐ion batteries (SIBs) because of the high intrinsic electronic conductivity, rich redox sites and unique reaction mechanism. In this work, we report the synthesis and electrochemical properties of a novel bimetallic TMCs material CuSbSe2. The as‐prepared anode delivers a high reversible capacity of 545.6 mA h g−1 for SIBs and 592.6 mA h g−1 for LIBs at a current density of 0.2 A g−1, and an excellent rate capability of 425.9 mA h g−1 at 20 A g−1 for SIBs and 226.0 mA h g−1 at 10 A g−1 for LIBs without any common‐used surface modification or carbonaceous compositing. In addition, ex situ X‐ray diffraction (XRD) and High‐resolution transmission electron microscopy (HRTEM) reveal a combined conversion‐alloying reaction mechanism of LIBs and NIBs. Our findings suggest bimetallic CuSbSe2 could be a potential anode material for both SIBs and LIBs. [ABSTRACT FROM AUTHOR]

[Display omitted] • Single-crystal high-entropy (oxy)hydroxides were prepared through multication exchange. • The import of Al in a multicomponent (oxy)hydroxides would induce the formation of nanoporous structure. • The mixing of Ru with other metallic elements moderates the electronic structure for better OER performance. • This dynamic crystal growth strategy could extend to fabricate diversiform (oxy)hydroxides. High-entropy materials are new-fashioned electrocatalysts due to their interesting "cocktail effect". However, it is still a great challenge to synthesize single-crystal high-entropy nanomaterials such as (oxy)hydroxides due to the different crystal growth mode for different elements. Herein, we design a dynamic crystal growth strategy by multi-cation exchange to fabricate single-crystal high-entropy (oxy)hydroxides nanosheets. Nanoporous morphology can be achieved by incorporating Al ion into the multicomponent (oxy)hydroxides system after a reversible Al insertion-dissolution process. When adopted as potential electrocatalysts for oxygen evolution reaction (OER), we find that the seven-component ZnVNiCoFeAlRu-OHs single-crystal nanoporous nanosheets display a significantly improved OER performance with a low overpotential of 229 mV at 10 mA cm−2 and a shallow Tafel slope of 39.3 mV dec−1. Both XPS and DFT calculation reveal that Ru acted an electron dedicator could effectively moderate the overall electronic structures for better OER performance. This work develops an entropy and enthalpy driven multi-cation exchange strategy for synthesizing a library of single-crystal high-entropy (oxy)hydroxides for various applications. [ABSTRACT FROM AUTHOR]

Bimetallic transition metal chalcogenides (TMCs) materials have emerged as attractive anodes for lithium-ion batteries (LIBs) and sodium-ion batteries (SIBs) because of the high intrinsic electronic conductivity, rich redox sites and unique reaction mechanism. In this work, we report the synthesis and electrochemical properties of a novel bimetallic TMCs material CuSbSe 2 . The as-prepared anode delivers a high reversible capacity of 545.6  mA h g -1 for SIBs and 592.6  mA h g -1 for LIBs at a current density of 0.2 A g -1 , and an excellent rate capability of 425.9  mA h g -1 at 20 A g -1 for SIBs and 226.0  mA h g -1 at 10 A g -1 for LIBs without any common-used surface modification or carbonaceous compositing. In addition, ex situ X-ray diffraction (XRD) and High-resolution transmission electron microscopy (HRTEM) reveal a combined conversion-alloying reaction mechanism of LIBs and NIBs. Our findings suggest bimetallic CuSbSe 2 could be a potential anode material for both SIBs and LIBs., (© 2022 Wiley-VCH GmbH.)