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Document and Entity Information
 12 Months Ended
Dec. 31, 2022
shares
Document and Entity Information  
Document Type 40-F
Document Registration Statement false
Document Annual Report true
Document Period End Date Dec. 31, 2022
Current Fiscal Year End Date --12-31
Entity File Number 001-41356
Entity Registrant Name Electra Battery Materials Corp
Entity Incorporation, State or Country Code CA
Entity Primary SIC Number 3330
Entity Address, Address Line One 133 Richmond Street W, Suite 602
Entity Address, City or Town Toronto
Entity Address State Or Province ON
Entity Address, Postal Zip Code M5H 2L3
Entity Address, Country CA
City Area Code 416
Local Phone Number (416) 900-3891
Title of 12(b) Security Common Shares
Trading Symbol ELBM
Security Exchange Name NASDAQ
Annual Information Form true
Audited Annual Financial Statements true
Entity Common Stock, Shares Outstanding 35,185,977
Entity Current Reporting Status Yes
Entity Interactive Data Current Yes
Entity Emerging Growth Company true
Entity Ex Transition Period false
ICFR Auditor Attestation Flag false
Entity Central Index Key 0001907184
Document Fiscal Year Focus 2022
Document Fiscal Period Focus FY
Amendment Flag false
Auditor Name KPMG LLP
Auditor Location Toronto, Canada
Auditor Firm ID 85
Business Contact  
Document and Entity Information  
Contact Personnel Name C T Corporation System
Entity Address, Address Line One 1015 15th Street, N.W., Suite 1000
Entity Address, City or Town Washington
Entity Address State Or Province DC
Entity Address, Postal Zip Code 20005
City Area Code 202
Local Phone Number 572-3111