Treatment and adhesive for microporous membranes

摘要

An electrochemical cell may have a PVDF microporous membrane that may be adhesively bonded to electrodes. The adhesive may be a mixture of a solvent and non-solvent that may cause the PVDF membrane to become tacky and adhere to an electrode without collapsing. An adhesively bonded cell may be constructed using multiple layers of adhesively bonded membranes and electrodes. In some embodiments, the adhesive solution may be used as a sizing to prepare electrodes for bonding.

主权项

1. A method of assembling an electrochemical cell comprising: receiving a first electrode for an electrochemical cell; receiving a microporous separator comprising polyvinylidene fluoride (PVDF), said microporous separator being at least 60% porous; using an adhesive to bond said microporous separator to said first electrode to form a first subassembly, said adhesive comprising: a solvent capable of dissolving said PVDF of said microporous separator; a non-solvent having a surface energy lower than a surface energy of said solvent; assembling said first subassembly to a second electrode to form said electrochemical cell.