▎ 摘　　要

NOVELTY - Preparation of three-dimensional network ferric fluoride flexible electrode involves mixing ferric fluoride-graphene electrode material and aqueous-soluble carbon nanotubes with ultrapure water, ultrasonically dispersing for 10-30 minutes, filtering, drying, and reacting. The ferric fluoride-graphene electrode material is obtained by adding graphene oxide in absolute ethanol, ultrasonically dispersing to obtain graphene dispersion, adding ferric nitrate nonahydrate and ammonium hydrogen fluoride, reacting, centrifuging, washing, drying, and heating. USE - Preparation of three-dimensional network ferric fluoride flexible electrode used for lithium-ion secondary battery. ADVANTAGE - The three-dimensional network ferric fluoride flexible electrode having excellent cycle performance, mechanical property, reliability and electrochemical performance is manufactured by simple and safe process. DETAILED DESCRIPTION - Preparation of three-dimensional network ferric fluoride flexible electrode involves mixing ferric fluoride-graphene electrode material and aqueous-soluble carbon nanotubes with ultrapure water, ultrasonically dispersing for 10-30 minutes, filtering, drying, and reacting at 200-350 degrees C in argon gas atmosphere for 3-5 hours. The ferric fluoride-graphene electrode material is obtained by adding graphene oxide in absolute ethanol, ultrasonically dispersing for 10-30 minutes to obtain graphene dispersion, adding ferric nitrate nonahydrate and ammonium hydrogen fluoride, reacting at 60-100 degrees C for 5-10 hours, centrifuging, washing, drying, and heating at 200-350 degrees C in argon atmosphere for 3-5 hours. The aqueous-soluble carbon nanotubes is obtained by dispersing carbon nanotubes in concentrated sulfuric acid, stirring at room temperature for 36-60 hours, adding 5 ml concentrated nitric acid, heat-preserving for l-3 hours, adding ultrapure water, filtering, and lyophilizing.