| Document and Entity Information | Dec. 20, 2021 |
| Document Information [Line Items] | |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | Dec. 20, 2021 |
| Entity Registrant Name | Perception Capital Corp. II |
| Entity Central Index Key | 0001844149 |
| Entity Emerging Growth Company | true |
| Entity Ex Transition Period | false |
| Entity File Number | 001-40976 |
| Entity Incorporation, State or Country Code | E9 |
| Entity Tax Identification Number | 98-1578608 |
| Entity Address, Address Line One | 315 Lake Street East |
| Entity Address, Address Line Two | Suite 301 |
| Entity Address, City or Town | Wayzata |
| Entity Address, State or Province | MN |
| Entity Address, Postal Zip Code | 55391 |
| City Area Code | 952 |
| Local Phone Number | 456-5300 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Units, Each Consisting of One Class A Ordinary Share and One-half of One Redeemable Warrant | |
| Document Information [Line Items] | |
| Title of 12(b) Security | Units, each consisting of one Class A ordinary share and one-half of one redeemable warrant |
| Trading Symbol | PCCTU |
| Security Exchange Name | NASDAQ |
| Class A Ordinary Shares, Par Value $0.0001 Per Share | |
| Document Information [Line Items] | |
| Title of 12(b) Security | Class A ordinary shares, par value $0.0001 per share |
| Trading Symbol | PCCT |
| Security Exchange Name | NASDAQ |
| Redeemable Warrants, Each whole Warrant Exercisable for One Class A Ordinary Share at an Exercise Price of $11.50 | |
| Document Information [Line Items] | |
| Title of 12(b) Security | Redeemable warrants, each whole warrant exercisable for one Class A ordinary share at an exercise price of $11.50 |
| Trading Symbol | PCCTW |
| Security Exchange Name | NASDAQ |
