{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,17]],"date-time":"2026-09-17T05:41:58Z","timestamp":1789623718780,"version":"build-2803163510"},"reference-count":62,"publisher":"MDPI AG","issue":"11","license":[{"start":{"date-parts":[[2026,5,31]],"date-time":"2026-05-31T00:00:00Z","timestamp":1780185600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100002631","name":"Gachon University","doi-asserted-by":"publisher","award":["GCU-2019- 0387"],"award-info":[{"award-number":["GCU-2019- 0387"]}],"id":[{"id":"10.13039\/501100002631","id-type":"DOI","asserted-by":"publisher"}]},{"award":["GCU-2019- 0387"],"award-info":[{"award-number":["GCU-2019- 0387"]}],"id":[{"id":"https:\/\/ror.org\/03ryywt80","id-type":"ROR","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100003661","name":"Korea Institute for Advancement of Technology","doi-asserted-by":"publisher","award":["RS-2025-02263458"],"award-info":[{"award-number":["RS-2025-02263458"]}],"id":[{"id":"10.13039\/501100003661","id-type":"DOI","asserted-by":"publisher"}]},{"award":["RS-2025-02263458"],"award-info":[{"award-number":["RS-2025-02263458"]}],"id":[{"id":"https:\/\/ror.org\/015w1qa96","id-type":"ROR","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Polymers"],"abstract":"<jats:p>Polymer-engineered MXene composites have emerged as a versatile materials platform for electrochemical energy storage, offering a means to address key limitations associated with ion transport, structural instability, and interfacial reactivity. This review provides a unified perspective on how polymer integration modifies the structure\u2013transport\u2013stability relationships of MXene-based systems across Na-ion batteries, aqueous Zn-ion batteries, and supercapacitors. In Na-ion systems, polymer-mediated interlayer engineering and porosity control improve ion accessibility and mitigate diffusion limitations arising from the large ionic radius of Na+. In aqueous Zn-ion systems, polymer electrolytes and interfacial layers regulate Zn2+ solvation and deposition behavior, suppressing dendritic growth and parasitic reactions. In supercapacitors, polymer\u2013MXene hybrids establish coupled ionic\u2013electronic transport pathways and mechanically compliant architectures, enabling stable electrochemical performance under high-rate and deformable conditions. Particular emphasis is placed on the underlying mechanisms responsible for suppressing oxidation, preserving structural integrity, and extending cycle life, including interfacial passivation, desolvation regulation, and structural confinement. These coupled effects govern long-term electrochemical stability across different energy storage systems. Finally, recent advances in operando characterization, data-driven materials design, and scalable processing are discussed in the context of future development. By linking material design strategies to fundamental mechanisms, this review outlines a coherent framework for the rational development of polymer\u2013MXene composites toward practical energy storage applications.<\/jats:p>","DOI":"10.3390\/polym18111365","type":"journal-article","created":{"date-parts":[[2026,6,1]],"date-time":"2026-06-01T08:09:16Z","timestamp":1780301356000},"page":"1365","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":3,"title":["Polymer-Engineered MXene Composites for Durable Electrochemical Energy Storage: Suppressing Oxidation, Preserving Structure, and Extending Cycle Life"],"prefix":"10.3390","volume":"18","author":[{"ORCID":"https:\/\/orcid.org\/0009-0009-5276-6060","authenticated-orcid":false,"given":"Byeongji","family":"Beom","sequence":"first","affiliation":[{"name":"Department of Materials Science and Engineering, Gachon University, Seongnam 13120, Republic of Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0009-0005-4598-2145","authenticated-orcid":false,"given":"Man-Ki","family":"Moon","sequence":"additional","affiliation":[{"name":"Department of Materials Science and Engineering, Gachon University, Seongnam 13120, Republic of Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jun-Hyeong","family":"Jung","sequence":"additional","affiliation":[{"name":"Department of Materials Science and Engineering, Gachon University, Seongnam 13120, Republic of Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0009-0002-1925-7706","authenticated-orcid":false,"given":"Seung-Chan","family":"Jung","sequence":"additional","affiliation":[{"name":"Department of Materials Science and Engineering, Gachon University, Seongnam 13120, Republic of Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-8145-3516","authenticated-orcid":false,"given":"Eou-Sik","family":"Cho","sequence":"additional","affiliation":[{"name":"Department of Electronic Engineering, Gachon University, Seongnam 13120, Republic of Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-6157-6340","authenticated-orcid":false,"given":"Keun-A","family":"Chang","sequence":"additional","affiliation":[{"name":"Department of Pharmacology, College of Medicine, Gachon University, Incheon 21999, Republic of Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-2676-4442","authenticated-orcid":false,"given":"Jae-Hee","family":"Han","sequence":"additional","affiliation":[{"name":"Department of Materials Science and Engineering, Gachon University, Seongnam 13120, Republic of Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2026,5,31]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"12653","DOI":"10.1039\/C7TA00863E","article-title":"Carbon-Based Composite Materials for Supercapacitor Electrodes: A Review","volume":"5","author":"Borenstein","year":"2017","journal-title":"J. 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