SECONDARY BATTERY AND ELECTRIC DEVICE

The invention relates to a secondary battery and an electric device, and belongs to the technical field of batteries. The secondary battery comprises an electrolyte and an electrode pole piece, the electrode pole piece comprises an electrode active material layer, the electrode active material layer comprises a binder containing alkali metal ions, the amount of substance of the alkali metal ions in the binder is A mol, the amount of substance of the alkali metal ions in the electrolyte is D mol, the ratio of A to D is 0.01-1.5, and the ratio of A to D is 0.01-1.5. Therefore, the cost of the secondary battery is effectively reduced, and the secondary battery still has excellent cycle performance. 本申请涉及一种二次电池和用电装置，属于电池技术领域。本申请的二次电池包括电解液和电极极片，电极极片包括电极活性材料层，电极活性材料层包括含碱金属离子的粘结剂，该粘结剂中的碱金属离子的物质的量为A mol，电解液中的碱金属离子的物质的量为D mol，A与D的比值为0.01-1.5，从而有效降低了二次电池的成本，同时使得二次电池仍具有优异的循环性能。