Exhibit 23.1

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We consent to the incorporation by reference in this Post-Effective Amendment No. 1 on Form S-3 to the Registration Statement on Form F-3 (No. 333-267419) of our report dated February 1, 2024 relating to the financial statements of Li-Cycle Holdings Corp., appearing in the Annual Report on Form 10-K of Li-Cycle Holdings Corp. for the year ended December 31, 2023. We also consent to the reference to us under the heading “Experts” in such Registration Statement.

/s/ Deloitte LLP

Chartered Professional Accountants

Licensed Public Accountants

Toronto, Canada

March 15, 2024