Secondary battery, battery pack, and stationary power supply

Abstract

In general, according to one embodiment, a secondary battery including an electrolyte, a positive electrode, and a negative electrode is provided. The electrolyte includes water and a lithium salt. The positive electrode includes a positive electrode active material-containing layer, a positive electrode current collector, and a nitrogen-containing substance. The positive electrode current collector supports the positive electrode active material-containing layer. The positive electrode current collector contains at least one of aluminum or an aluminum alloy. The nitrogen-containing substance presents at least a part of a surface of the positive electrode current collector.

Dependencies are inferred from the claim text.