▎ 摘　　要

NOVELTY - Electroactive nanocomposites comprises graphene oxide and reduced graphene oxide in which the surfaces of insulated sheets are coated with alpha nickel hydroxide nanoparticles, transition metals, binary additives with rare earths, alpha hydroxide of ternary nickel hydroxide added with transition metals and rare earths with interlamellar distances between 8-25 Angstrom , preferably between 9-15 Angstrom . USE - Electroactive nanocomposites used in electrochemical devices like electric cars, supercapacitors, chemical and electrochemical sensors, and electrochromic devices, electrodes for electrochemical synthesis, fuel cells and for preparation of catalysts for artificial photosynthesis (claimed). DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method for preparing nanocomposites, which involves: (A) mixing 1-50 wt.% components and 10-25 wt.% carbonaceous material; (B) preparing alpha-Ni(OH)2, alpha-NiCo(OH)2 nanoparticles, other binary mixed derivatives such as alpha-NiCe(OH)2 and ternary mixed hydroxide derivatives such as alpha-NiCoCe(OH)2 or higher transition metals and rare earths in the form of sol, where the ratio of nickel to the other transition metal elements such as cobalt and rare earth such as cerium in binary mixed materials, mixed ternary and higher materials are in the molar ratio of 50:50-100:0, preferably 60:40-90:10; (C) preparing graphite oxide (Gr-O) and graphene oxide (GO) and reduced graphene oxide (rGO) dispersions; (D) preparing nanocomposites with alpha-Ni(OH)2/GO nanoparticles and with nanoparticles of binary mixed hydroxides and mixed ternary or higher derivatives of transition metals and earths rare; (E) preparing r-GONi nanocomposite and the nanocomposites of the binary mixed hydroxides derivatives and the ternary or higher mixed metal hydroxide derivatives of transition metals and rare earths; and (F) preparing rGONi/NiCo(OH)2 nanocomposite and the nanocomposites of the binary mixed hydroxides derivatives and the ternary or higher mixed hydroxide derivatives of transition metals and rare earths.