| abstract |
Disclosed is an overcharge prevention agent that can shorten the time until current interruption during overcharge, suppress thermal runaway of the battery, and improve the safety of the battery during overcharge. An overcharge inhibitor comprising a compound represented by the general formula (1). M n + ([B (CN) 4−m Y m ] − ) n (1) (In the formula, M n + represents H + , monovalent, divalent, or trivalent organic or inorganic cation, Y represents an organic group, m represents an integer of 0 to 3, and n represents 1 to 3) Represents an integer.) [Selection] Figure 1 |