▎ 摘　　要

NOVELTY - Electrode comprises a nanocomposite of graphene oxide and a silicon-based polymer matrix. USE - The electrode is useful as an anode in lithium-ion battery (claimed), an electric car, a hybrid electromotive car, a mobile phone or a personal computer. ADVANTAGE - The electrode: exhibits a capacity of 800 mAh/g when the lithium-ion battery cycles at C-rate of C/20 for at least 500 cycles, a capacity retention of at least 100 mAh/g when the lithium-ion battery cycles at C-rate of 100 C for at least 500 cycles, a capacity retention of at least 85% after the lithium-ion battery runs for 1000 cycles under a 0.01-3 V voltage-window at C/5 rate, a capacity retention of at least 90% after the lithium-ion battery runs for 1000 cycles under a 0.01-3 V voltage-window at C/10 rate, a superlative power density of at least 250 kW/kg after the lithium-ion battery runs for at least 100 cycles under a 0.01-2.5 V voltage-window at a rate of 6000 C, and a recovery of at least 95% charge capacity after the lithium-ion battery runs for at least 500 cycles under a 0.01-2.5 V voltage-window at a rate of 2000 C; has superior performance; exhibits a high energy density of 800 mAh/g reversible capacity, a high and good stability and a robust resistance to failure; provides high specific area for reaction; and has extremely high specific charge capacity. The methods are safe and more environmentally friendly. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for: (1) a lithium-ion battery including an anode including the electrode; (2) preparing a nanocomposite of graphene-oxide and a polymer matrix, comprising providing a liquid polymeric precursor, providing graphene oxide, mixing the liquid polymeric precursor and the graphene oxide, crosslinking e.g. thermally crosslinking the liquid mixture, and pyrolyzing the mixture in an inert atmosphere at temperatures of up to 1100 degrees C; and (3) preparing a nanocomposite of graphene oxide, comprising providing a solid polymer, milling the solid polymer with graphene oxide, and pyrolyzing the milled mixture in an inert atmosphere at temperatures of up to 1100 degrees C. DESCRIPTION OF DRAWING(S) - The figure shows the nanocomposite structure of an anode including graphene-oxide sheets distributed in a polymer-derived matrix. Graphene-oxide sheets (11) Polymer-derived matrix (12)