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Because of their high electrochemical activity, good structural stability, and abundant active sites, multi-metal sulfide/carbon (MMS/C) composites are of tremendous interest in diverse fields, including catalysis, energy, sensing, and environmental science. However, their cumbersome, inefficient, and environmentally unfriendly synthesis is hindering their practical application. We report a straightforward and universal method for their production which is based on homogeneous multi-phase interface engineering. The method has enabled the production of 14 different MMS/C composites, as examples, with well-organized composite structures, different components, and dense heterointerfaces. Because of their composition and structure, a typical composite has efficient, fast, and persistent lithium-ion storage. A ZnS-Co<sub>9</sub>S<sub>8</sub>/C composite anode showed a remarkable rate performance and an excellent capacity of 651 mAh·g<sup>−1</sup> at 0.1 A·g<sup>−1</sup> after 600 cycles. This work is expected to pave the way for the easy fabrication of MMS/C composites.
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a) LSV polarization curves, dashed and solid lines are current on
A-C) SEM images of the NiCo precursor, NiCo 2 S 4 and rGO-NiCo 2 S 4
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