{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,7,30]],"date-time":"2026-07-30T13:00:26Z","timestamp":1785416426162,"version":"3.56.0"},"reference-count":156,"publisher":"MDPI AG","issue":"8","license":[{"start":{"date-parts":[[2026,4,15]],"date-time":"2026-04-15T00:00:00Z","timestamp":1776211200000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"Ningbo Yongjiang Talent Introduction Program","award":["2023A-390-G"],"award-info":[{"award-number":["2023A-390-G"]}]},{"name":"Scientific Research Starting Foundation of Ningbo University of Technology","award":["2023KQ077"],"award-info":[{"award-number":["2023KQ077"]}]},{"name":"Scientific Research Starting Foundation of Ningbo University of Technology","award":["2022KQ31"],"award-info":[{"award-number":["2022KQ31"]}]},{"award":["2023KQ077"],"award-info":[{"award-number":["2023KQ077"]}],"id":[{"id":"https:\/\/ror.org\/03et85d35","id-type":"ROR","asserted-by":"publisher"}]},{"award":["2022KQ31"],"award-info":[{"award-number":["2022KQ31"]}],"id":[{"id":"https:\/\/ror.org\/03et85d35","id-type":"ROR","asserted-by":"publisher"}]},{"name":"College Students\u2019 Innovation and Entrepreneurship Training Program of Zhejiang","award":["S202511058022"],"award-info":[{"award-number":["S202511058022"]}]},{"name":"College Students\u2019 Innovation and Entre-preneurship Training Program of China","award":["202511058059X"],"award-info":[{"award-number":["202511058059X"]}]},{"name":"Young Elite Scientists Sponsorship Program by CAST","award":["2023QNRC001"],"award-info":[{"award-number":["2023QNRC001"]}]},{"DOI":"10.13039\/501100011353","name":"State Key Laboratory of Powder Metallurgy","doi-asserted-by":"publisher","award":["Sklpm-KF-2025024"],"award-info":[{"award-number":["Sklpm-KF-2025024"]}],"id":[{"id":"10.13039\/501100011353","id-type":"DOI","asserted-by":"publisher"}]},{"award":["Sklpm-KF-2025024"],"award-info":[{"award-number":["Sklpm-KF-2025024"]}],"id":[{"id":"https:\/\/ror.org\/04r12t513","id-type":"ROR","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Materials"],"abstract":"<jats:p>Low-dimensional van der Waals (vdW) ferroelectrics are promising for next-generation low-power, non-volatile electronics and brain-inspired computing. Among them, CuInP2S6 (CIPS) has emerged as one of the most intensively explored systems. Distinct from conventional ferroelectrics, CIPS features a strong \u201cferroionic\u201d coupling between ferroelectric order and long-range Cu+ migration, unlocking unique properties such as multiple polarization states, negative capacitance, and richly tunable conductance states. To date, however, a comprehensive review centered on this ferroionic coupling remains lacking. This review aims to fill that gap by systematically elucidating the ferroionic coupling mechanism, summarizing its manipulation through chemical composition engineering and external fields, and clarifying the dynamic conductive responses and related mechanism. This review further surveys the high-performance CIPS-based nanoelectronic devices enabled by unique properties and concludes with an outlook on future challenges and research directions.<\/jats:p>","DOI":"10.3390\/ma19081586","type":"journal-article","created":{"date-parts":[[2026,4,15]],"date-time":"2026-04-15T10:30:23Z","timestamp":1776249023000},"page":"1586","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Van Der Waals Ferroionic CuInP2S6: Emergent Properties and Device Application"],"prefix":"10.3390","volume":"19","author":[{"given":"Muzhi","family":"Li","sequence":"first","affiliation":[{"name":"School of Energy and Power Engineering, Changsha University of Science & Technology, Changsha 410014, China"},{"name":"Institute of Micro\/Nano Materials and Devices, Ningbo University of Technology, Ningbo 315211, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Zhuoyin","family":"Peng","sequence":"additional","affiliation":[{"name":"School of Energy and Power Engineering, Changsha University of Science & Technology, Changsha 410014, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Dongdong","family":"Zhang","sequence":"additional","affiliation":[{"name":"Institute of Micro\/Nano Materials and Devices, Ningbo University of Technology, Ningbo 315211, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Xueyun","family":"Wang","sequence":"additional","affiliation":[{"name":"School of Aerospace Engineering, Beijing Institute of Technology, Beijing 100081, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Weiyou","family":"Yang","sequence":"additional","affiliation":[{"name":"Institute of Micro\/Nano Materials and Devices, Ningbo University of Technology, Ningbo 315211, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Zhao","family":"Liang","sequence":"additional","affiliation":[{"name":"Institute of Micro\/Nano Materials and Devices, Ningbo University of Technology, Ningbo 315211, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Xingan","family":"Jiang","sequence":"additional","affiliation":[{"name":"Institute of Micro\/Nano Materials and Devices, Ningbo University of Technology, Ningbo 315211, China"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2026,4,15]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"nwab164","DOI":"10.1093\/nsr\/nwab164","article-title":"Recent progress in the synthesis of novel two-dimensional van der Waals materials","volume":"9","author":"Bian","year":"2022","journal-title":"Natl. 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