A bipolar-redox tetraalkynylporphyrin macrocycle positive electrode with 12-electrons-transfer for high-energy aluminum-organic batteries.

ABSTRACT: Organic electrode materials with bipolar-redox activity are a promising candidate for high-energy aluminum-ion batteries (AIBs), but face the capacity ceiling due to limited active sites and low electron transfer number. To universally address this issue, seeking for a kind of multisite bipolar organic material to achieve multielectron transfer is a prerequisite but challenging. Herein, we develop a 12-electron transfer tetraalkynylporphyrin macrocycle positive electrode with two p-type amine (‒NH‒) motifs, two n-type imine (C = N) motifs and four n-type alkynyl (C ≡ C) motifs. The bipolar 18π-electron porphyrin macrocycle can alternately bind and release AlCl₄^- anions at ‒NH‒ sites and AlCl₂⁺ cations at C = N sites (oxidized from 18π to 16π or r

SUBMITTER: Guo Y 

PROVIDER: S-EPMC11928495 | biostudies-literature | 2025 Mar

REPOSITORIES: biostudies-literature