POLYMERIC BINDERS ON AQUEOUS AND ALCOHOL BASIS FOR ELECTROCHEMICAL CAPACITORS

Abstract

Investigation  a  possibility  for  application  of  new  polymer  binders  in  electrochemical power sources on water and alcohol basis. The  characteristics  of  electrochemical  capacitors  based  on  the  polymeric  binders such  as  polyvinylbutyral,  polyvinylpyrrolidone  and  a  water  suspension  of  polyvinylidene  fluoride  were investigated, using the cyclic voltammetry, galvanostatic cycling and impedance spectroscopy.  Laboratory prototypes of electrochemical capacitors were made using a "sandwich" type cell.  Polyvinylpyrrolidone  and  polyvinylidene  fluoride  as  polymer  binders  for  electrochemical capacitors were proposed. The polyvinylpyrrolidone in EC electrodes allows reducing the internal resistance of  EC  by  half.  Also,  polyvinylidene  fluoride  and  polyvinylpyrrolidone  make  it  possible  to  manufacture electrodes by the doctor-blade method, which is impossible in the case of polytetrafluoroethylene. The such polymers will automate the process of manufacturing electrodes of EC and significantly reduce the cost of EC. Originality. A water suspension of polyvinylidene fluoride was considered as a polymeric binder for electrochemical capacitors for the first time.   Practical significance.  The  results  can  be  used  for  the  development  of  advanced  electrochemical power sources. The development of environmentally friendly methods for producing composite materials for electrochemical capacitors are actual scientific and technical problems.