Solid State Electrolyte-Enhanced Manganese Dioxide Lithium Primary Battery for Secondary Equipment Power in Grid

PEO-based gel polymer electrolyte had been synthesized via a simple three-step organic liquid phase reaction. Non-woven separator and PP separator were soaked in the gel polymer electrolyte for different time to obtain the best performance of the composite electrolyte. The SEM results revealed that the non-woven separator and PP separator was well covered by the gel polymer electrolyte. And the electrochemical performances of primary battery were evaluated, which were proven by galvanotactic discharge and electrochemical impedance spectroscopy test. Both non-woven separator and PP separator soaked in gel polymer electrolyte for 0.5 h exhibited excellent discharge time of 229 h and 218 h at a current density of 1 mA/cm2. The enhanced electrochemical performance can be attributed to the improved interfacial compatibility between the electrode and electrolyte.