▎ 摘　　要

NOVELTY - A binder composition comprises a blend comprising a polybutadiene-based polymer and a polynorbornene-based polymer comprising norbornene-based monomer units derived from the polymerization of a bicyclo2.2.1hept-2-ene compound (I). USE - Binder composition used for electrode material for forming electrode e.g. self-supporting electrode for electrochemical cell for electrochemical battery e.g. all-solid battery chosen from lithium battery, lithium-ion battery, sodium battery, sodium-ion battery, magnesium battery and magnesium- ion battery, preferab1y lithium battery or lithium-ion battery (all claimed). ADVANTAGE - The binder composition has improved dispersion of the particles of the solid electrolyte, and provides the electrochemical cell having excellent electrochemical performance. The all-solid-state electrochemical system is safe, light weight, flexible, and efficient. DETAILED DESCRIPTION - A binder composition comprises a blend comprising a polybutadiene-based polymer and a polynorbornene-based polymer comprising norbornene-based monomer units derived from the polymerization of a bicyclo2.2.1hept-2-ene compound of formula (I). R ,R =H, carboxy, sulfonic, hydroxy, F or Cl. INDEPENDENT CLAIMS are included for the following: electrode material, which comprises an electrochemically active material and the binder composition; electrode, which comprises the electrode material on a current collector; and electrochemical cell, which comprises a negative electrode, a positive electrode and an electrolyte. At least one of the positive electrode or the negative electrode is the electrode comprising the electrode material.