Battery cell with aluminum components, battery, and electric apparatus

A battery cell, comprising:

• an electrode assembly, comprising:
• a positive electrode plate comprising a positive electrode current collector and a positive electrode active material disposed on the positive electrode current collector, the positive electrode active material comprising an active material configured to reversibly deintercalate and intercalate sodium ions;
• and
• a negative electrode plate comprising a negative electrode current collector, the negative electrode current collector comprising two metal substrates, the metal substrates disposed on two sides of a first insulating material layer along a thickness direction;
• and
• a negative electrode adapter electrically connecting the metal substrates and a negative electrode lead-out portion,
• wherein a constituent material of the metal substrates comprise element aluminum, and a mass percentage of the element aluminum is greater than a mass percentage of each of other elements,
• wherein a constituent material of the negative electrode adapter comprises element aluminum with a mass percentage greater than or equal to 90%,
• wherein a constituent material of the negative electrode lead-out portion comprises element aluminum, a mass percentage of the element aluminum being greater than a mass percentage of each of other elements.