▎ 摘　　要

NOVELTY - Preparing metal-sulfide particles, comprises: preparing a precursor solution comprising a copper-containing precursor and a metal containing precursor; mixing the precursor solution with water to form an aqueous precursor solution; adding a sulfur containing precursor to the aqueous precursor solution to form a sulfur-containing aqueous precursor solution; heating the sulfur-containing aqueous precursor solution, and recovering a precipitate from the sulfur containing anode solution, where the precipitate comprises metal sulfide particles; and optionally adding a carbon-containing material to the solution. The metal-containing precursor comprises tin-containing precursor or iron-containing precursor. The metal-containing precursor comprises tin-containing precursor; and the aqueous precursor solution comprises 0.05-0.35 M copper(II) chloride dihydrate and 0.05-0.2 M tin(IV) chloride. The method further comprises adding a carbon-containing material to the aqueous precursor solution. USE - The method is useful for preparing metal-sulfide particles which are useful in lithium-ion anode, lithium-ion capacitor (all claimed), batteries and supercapacitors. ADVANTAGE - The method: provides metal-sulfide particles which exhibit increased electrochemical properties; utilizes carbon-containing material which may provide increase the electrochemical property of the formed material, while simultaneously reducing shortcomings of metal-sulfide particles independently; and provides numerous benefits over conventional technologies. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for: a lithium-ion anode (102), comprising metal-sulfide particles comprising at least one of copper, tin, or iron and a carbon-containing material at least partially encapsulating the metal-sulfide particles; and a lithium-ion capacitor (100) comprising metal-sulfide particles that are at least partially encapsulated by a carbon-containing material. DESCRIPTION OF DRAWING(S) - The figure illustrates schematic cross-sectional view of lithium-ion supercapacitor. 100Lithium-ion capacitor 102Anode 104Cathode 106Electrolyte 108Separator