| abstract |
The present invention provides a kind of paste compound, it includes negative electrode active material, particle shape binding material, water-soluble polymer, Yi Jishui, particle shape binding material includes the 1st particle shape binding material and the 2nd particle shape binding material, the 1st particle shape binding material includes the copolymer (A) with aliphatic conjugated diene monomer unit and aromatic vinyl monomer unit, and its electrolyte swellbility is 110~200 mass %, glass transition temperature is 30 DEG C~60 DEG C and gel content is 70~98 mass %；The 2nd particle shape binding material includes the copolymer (B) with aliphatic conjugated diene monomer unit and aromatic vinyl monomer unit, and its electrolyte swellbility is 250~600 mass % and gel content is 70~98 mass %. |