[EN] METHOD FOR POLYMER PRECIPITATION<br/>[FR] PROCÉDÉ DE PRÉCIPITATION DE POLYMÈRE
申请人:GUANGDONG HAOZHI TECH CO LIMITED
公开号:WO2021253849A1
公开(公告)日:2021-12-23
Disclosed is a method for precipitating a polymer by adding a precipitation agent into a first suspension to form a second suspension; wherein the first suspension comprises a polymer and an aqueous solvent; and wherein the polymer comprises a copolymer comprising a structural unit derived from an acid group-containing monomer and a structural unit derived from a hydrophobic group-containing monomer. The method for precipitation of a polymer disclosed herein is developed to initiate the bond disruption and/or breakage between the polymer and the aqueous solvent within the second suspension. This is accompanied with the structural transformation of the polymer driven by the intermolecular and intramolecular interactions of the polymer chains which brings about the precipitation of the polymer. The method circumvents both complex separation process and contamination of the polymer, enables excellent materials recovery and allows the precipitation of the polymer to be achieved within a short time frame. An application of the method for precipitating a polymeric binder in a battery electrode is disclosed herein.
[EN] BINDER COMPOSITION FOR SECONDARY BATTERY<br/>[FR] COMPOSITION DE LIANT POUR BATTERIE SECONDAIRE
申请人:GUANGDONG HAOZHI TECH CO LIMITED
公开号:WO2021254245A1
公开(公告)日:2021-12-23
A binder composition that can be used in a dry electrode mixture or electrode slurry for producing an electrode is disclosed. The binder composition comprises a water-compatible copolymer, and has a liquid content of less than 85%by weight, based on the total weight of the binder composition. The reduced liquid content of the binder composition improves transport and storage efficiency compared to a conventional wet binder composition. The binder composition disclosed herein is versatile, and can be used successfully in a dry electrode mixture and an electrode slurry. Batteries comprising electrodes prepared with the binder composition disclosed herein have electrochemical performances comparable to batteries comprising electrodes produced via a conventional wet binder composition.