ELECTRODE ASSEMBLY, ELECTROCHEMICAL APPARATUS, AND ELECTRIC APPARATUS

An electrode assembly includes a positive electrode material layer, where the positive electrode material layer of the electrode assembly includes a first positive electrode material LiMnFePO, a single-side thickness of the positive electrode material layer is Tμm, and 22≤T≤110. A length of a positive electrode plate is Lmm. The electrode assembly further includes at least one positive electrode tab. When there is one positive electrode tab, the positive electrode tab is a centrally disposed tab structure; or when there are multiple positive electrode tabs, a ratio of the number of the positive electrode tabs to Lis B, and 0.002≤B≤0.01.