NOVELTY - The composition has a phase provided with a conjugated diene latex particle and an acryl group copolymer latex particle. Average diameter of the conjugated diene latex particle is 50-200 nm. Average diameter of the acryl group copolymer latex particle is 300-700 nm. The acrylate type latex copolymer particle contains 1-30 wt.% of solid content. The particles are made of acrylic acid ester class monomer, acrylate-based monomer, vinyl monomer, acrylamide based monomer and polymeric composition that is selected from nitrile monomer.    USE - Binder composition for a lithium secondary battery in a medical mixture of an electrode in an electrochemical device i.e. power storage system, and a vehicle i.e. car, such as electric vehicle, petrol vehicle, diesel vehicle, hybrid electric vehicle, electric golf cart, electric bicycle, electrical scooter and electricity two-wheeled vehicle (all claimed).    ADVANTAGE - The composition improves electrode adhesive strength of a binder and operation performance of a lithium secondary battery. The composition increases thickness of an electrode.    DETAILED DESCRIPTION - The acrylic acid ester class monomer is selected from methyl acrylate, ethyl acrylate, propyl acrylate, isopropyl acrylate, N-butyl acrylate, isobutyl acrylate, N- amylacrylate, isoamyl acrylate, N- ethylhexyl acrylate, 2- ethylhexyl acrylate, 2- hydroxy ethyl acrylate, methylmethacrylate, ethylmethacrylate, profile mecrylate, isopropyl mecrylate, N-butylmethacrylate, isobutyl methacrylate, N- amylmethacrylate, isoamyl methacrylate, N- hexylmethacrylate, N- ethylhexylmethacrylate, 2 ethylhexyl methacrylate, hydroxyethyl methacrylate or hydroxypropyl methacrylate. The acrylate-based monomer is selected from methacryloxy ethylethylene urea, beta- carboxyethyl acrylate, aliphatic monoacrylate, dipropylene diacrylate, di trimethylopropane tetraacrylate, hydroxy ethyl acrylate, di pentaerythriol hexaacrylate, pentaerythriol triacylate, pentaerythriol tetraacrylate, lauryl acrylate, seryl acrylate, stearyl acrylate, lauryl methacrylate or cetyl methacrylate.