Polyelectrolyte, non-aqueous electrolyte, and electrical device containing the same

A polymeric electrolyte comprising an electrolytic salt, a polymeric compound forming a complex with the electrolytic salt and a compound having boron atoms which is one or more selected from the group consisting of compounds represented by the following general formulas (1) to (4)

• wherein R11, R12, R13, R14, R15 and R16 in formula (1), R21, R22, R23, R24, R25, R26, R27 and R28 in formula (2), R31, R32, R33, R34, R35, R36, R37, R38, R39 and R310 in formula (3), and R41, R42, R43, R44, R45, R46, R47, R48, R49, R410, R411 and R412 in formula (4), which may be the same or different, each represent a hydrogen atom, a halogen atom or a monovalent group, or are bound to each other to form a ring,
• Ra in formula (1) represents a group having a site capable of being bound to at least 3 boron atoms which are the same or different, Rb in formula (2) represents a group having a site capable of being bound to at least 4 boron atoms which are the same or different, Rc in formula (3) represents a group having a site capable of being bound to at least 5 boron atoms which are the same or different, and Rd in formula (4) represents a group having a site capable of being bound to at least 6 boron atoms which are the same or different.