Lithium supplement material, positive pole piece, secondary battery and electronic equipment

The invention provides a lithium supplementing material, a positive pole piece, a secondary battery and electronic equipment, the lithium supplementing material comprises a compound with a chemical formula of Li2 (C2O4) a (SO4) b (NO3) c, a + b + 0.5 c = 1, a is more than 0 and less than 1, b is more than or equal to 0, and c is more than or equal to 0. The lithium supplementing material has relatively low lithium removal potential, and active lithium can be removed under low potential, so that the active lithium consumed during first-time charging is supplemented, the damage of high-voltage charging to an electrode material structure is avoided, and the capacity and cycle performance of the battery are improved. 本申请提供了一种补锂材料、正极极片、二次电池和电子设备，该补锂材料包括化学式为Li2(C2O4)a(SO4)b(NO3)c的化合物，其中，a+b+0.5c＝1，0＜a＜1，b≥0，c≥0。该补锂材料具有较低的脱锂电位，能够在低电位下脱出活性锂，从而补充首次充电时消耗的活性锂，避免高电压充电对电极材料结构的破坏，提高电池的容量和循环性能。