Electropolymerization of Donor–Acceptor Conjugated Polymer for Efficient Dual‐Ion Storage

Advanced Science, Journal Year: 2024, Volume and Issue: 11(23)

Published: April 6, 2024

Abstract Rationally designed organic redox‐active materials have attracted numerous interests due to their excellent electrochemical performance and reasonable sustainability. However, they often suffer from poor cycling stability, intrinsic low operating potential, rate performance. Herein, a novel Donor–Acceptor (D–A) bipolar polymer with n ‐type pyrene‐4,5,9,10‐tetraone unit storing Li cations p carbazole which attracts anions provides polymerization sites is employed as cathode for lithium‐ion batteries through in situ electropolymerization. The multiple redox reactions boosted kinetics by the D–A structure lead of high discharge capacity 202 mA h g −1 at 200 , impressive working potential (2.87 4.15 V), an outstanding capability 119 10 A noteworthy energy density up 554 Wh kg . This strategy has significant implications molecule design stability density.

Language: Английский

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Striving to Disclose the Electrochemical Processes of Organic Batteries

Accounts of Chemical Research, Journal Year: 2025, Volume and Issue: unknown

Published: March 17, 2025

ConspectusOrganic/polymeric materials are promising as electrode for batteries because of their advantages flexibility, high specific capacity due to the possible multielectron transfer, low cost from green natural resources, and weak intermolecular interactions that enable storage low-cost large-sized or multivalent metal ions. However, development organic (OEMs) understanding electrochemical process face great challenges in characterization polymers charge mechanisms: (1) charged and/or discharged states OEMs often air unstable, which makes ex situ characterizations susceptible interference air. (2) OEMs, particularly polymeric materials, designed be insoluble deliver cyclability, it difficult them separated electrode. (3) Possible transfer determine whether proposed mechanism experiment results wrong when actual mismatches with theoretical based on mechanisms. (4) It is achieve single crystals polymers, hence, seems impossible know locations stored ions polymers. (5) The typical methods only qualitative, challenging quantify amount (6) Even most characterizations, they can give tendency qualitative structural evolution.In this Account, we an overview significance related mechanisms materials. Then, summarize our efforts recent years reveal insights into process. Focusing complexity polymer a strategy control reaction kinetics order obtain high-quality microcrystals chemical structure could successfully revealed by crystal analysis. To avoid inconvenient brought insolubility soluble monomers oligomers were studied under same conditions simulate analyze We also synthesis isomers deep structure–property relationships OEMs. On other hand, traditional instruments techniques reconsidered more information even quantitative via insightful analysis data smart design experiments. In addition, introducing internal standard substances, was realize characterizations. Strategies convert black box different charged/discharged detectable signals developed. This Account provides summary progress prospects future rechargeable batteries.

Language: Английский

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Regulating the Metal Nodes of In Situ Electropolymerized Metal–Organic Coordination Polymers for High Performance LIBs

Small, Journal Year: 2025, Volume and Issue: unknown

Published: April 17, 2025

Abstract Metal–organic coordination polymers (MOPs) comprised of redox‐active organic moieties and metal ions emerge as an important class electroactive materials for battery applications. The bipolar two transition metal‐based (Fe Co) complexes bearing terpyridine‐triphenylamine ligand are used models to investigate the relationships between structure electrochemical performance. It turned out that choice central atom has a profound influence on practical voltage window specific capacity. high‐performing poly(FeL) n electrode exhibits reversible capacity 272.5 mAh g −1 after 100 cycles at 50 mA , excellent cycling stability up 4000 5A (capacity ration:83.1%), rate poly(CoL) significantly lower 107 100th cycle inferior (54 retention: 38.7%). DFT analysis indicates center directly influences electron cloud density metal‐terpyridine structure, which in turn affects redox activity polymer by varying affinity lithium charge transfer efficiency. These findings highlight importance centers polymers, providing direct guidance exploration MOPs novel resource‐friendly cathode materials.

Language: Английский

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Molecular size matching of dopant in polypyrrole and anion in dual-ion battery enhancing the energy storage ability and dynamics of polypyrrole cathode

Chemical Engineering Journal, Journal Year: 2025, Volume and Issue: unknown, P. 161471 - 161471

Published: March 1, 2025

Language: Английский

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Electropolymerized Organic N/P Bipolar Cathode Toward High Energy and High Power Density Sodium Dual-Ion Batteries

Journal of Materials Chemistry A, Journal Year: 2024, Volume and Issue: 12(48), P. 33624 - 33631

Published: Jan. 1, 2024

PTPA-AQ, an in situ electropolymerized bipolar organic cathode for sodium dual-ion batteries, achieving 426 Wh kg −1 energy density after 300 cycles at 0.2 A g − ¹, with 3000 cycle stability 5 ¹ and 14.9 kW power density.

Language: Английский

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P-type redox-active organic materials as cathodes for dual-ion batteries : principles and design strategies

Energy storage materials, Journal Year: 2024, Volume and Issue: 74, P. 103879 - 103879

Published: Nov. 2, 2024

Language: Английский

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