NOVELTY - The method involves preparing ink of an electrode by dispersion of mixture of solid particles in aqueous phase, where the mixture of solid particles includes a material activating the electrode and a binder consisting of lignocelluloses material. The ink is transferred to a part of a face of a flexible substrate by printing/deposition technique, where the substrate is selected from one of cellulose substrate, polymeric film and polymeric membrane. The ink is dried to obtain a supported flexible electrode including a film of the electrode deposited on the part of the face of the substrate.    USE - Method for preparing flexible electrode of lithium-ion battery in a portable device such as mobile phone, computer and light, and in two-wheel vehicle e.g. bicycle and auto-cycle, and four-wheel vehicle e.g. electric car and hybrid car.    ADVANTAGE - The method enables utilizing raw materials with better electrochemical performances and utilizing refined cellulose fiber to obtain anodes with better mechanical properties in terms of capacity and stability while providing sufficient conductivity. The method enables using flexography for intermediate pullings, and easy changing of a stereotype plug, thus increasing successive printing by flexography to improve electronic conductivity of a cathode. The method enables performing printing process in a rapid manner and ensuring less film thickness without crack, avoiding usage of organic solvents, and ensuring easy dismantling of the electrode, thus prolonging the service life of the electrode.    DETAILED DESCRIPTION - The lignocelluloses material is selected from one of cellulose fiber, refined cellulose fiber, cellulose micro fibril, cellulose nano fibril and lignin. The printing technique is selected from one of serigraphy, flexography and photogravure. An INDEPENDENT CLAIM is also included for a method for manufacturing a lithium-ion battery.    DESCRIPTION OF DRAWING(S) - The drawing shows a graphical illustration of absence of hysteresis loop between curve of ink at rest and curve of ink after shearing process.'(Drawing includes non-English language text)'