Lithium-ion battery

Abstract

A lithium-ion battery characterized in that it comprises a cell, the cell comprising a positive electrode plate and an electrolyte, the positive electrode plate comprising an active material layer of the positive electrode, the active material layer of the positive electrode comprising an active material of the positive electrode, the active material of the positive electrode comprising a layered transition metal oxide; wherein, after 200 charge-discharge cycles of the lithium-ion battery, the ratio between the thickness of the rock salt phase in the layered transition metal oxide and the diameter of the layered transition metal oxide is a; wherein the particle sizes Dn90, Dn10, and Dn50 of the layered transition metal oxide satisfy the following: (Dn90 - Dn10) × Dn50 is b µm², the units of Dn90, Dn10, and Dn50 are each µm; wherein the viscosity of the electrolyte at 25 °C is c mPa·s;where the lithium-ion battery satisfies the following: 0.014 ≤ a × b × c ≤ 21.;