{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,29]],"date-time":"2026-10-29T10:57:10Z","timestamp":1793271430116,"version":"4.5.0"},"reference-count":44,"publisher":"Wiley","issue":"12","license":[{"start":{"date-parts":[[2023,11,20]],"date-time":"2023-11-20T00:00:00Z","timestamp":1700438400000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100001809","name":"National Natural Science Foundation of China","doi-asserted-by":"publisher","id":[{"id":"10.13039\/501100001809","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Small Science"],"published-print":{"date-parts":[[2023,12]]},"abstract":"<jats:p>Sodium iron phosphate (NaFePO<jats:sub>4<\/jats:sub>) has attracted significant attention because of its high theoretical capacity (155\u2009mA\u2009h\u2009g<jats:sup>\u22121<\/jats:sup>), remarkable structural stability, and abundant elemental composition. However, the electrochemical reversibility of maricite NaFePO<jats:sub>4<\/jats:sub> is generally considered inactive. Herein, a nanoengineering strategy to activate the electrochemical activity of maricite NaFePO<jats:sub>4<\/jats:sub> is presented. This approach involves the construction of ultrasmall maricite NaFePO<jats:sub>4<\/jats:sub> nanoparticles encapsulated within an ultrathin carbon layer (denoted as m\u2010NFP@C), which greatly improves the electrochemical properties of the material. Notably, the optimized m\u2010NFP@C nanoparticles exhibit an impressive reversible capacity of 101.4\u2009mA\u2009h\u2009g<jats:sup>\u22121<\/jats:sup> after 100 cycles at a current density of 20\u2009mA\u2009g<jats:sup>\u22121<\/jats:sup>, demonstrating a remarkable capacity retention of 90.5%. Furthermore, when coupled with the bismuth\u2013carbon microfoam\u2010like compound (Bi@NC\u2010MF) anode, the fabricated sodium\u2010ion full cell exhibits exceptional cycling stability with a capacity retention of 90.6% over 250 cycles. The remarkable electrochemical performance of this material can be attributed to its excellent structural stability, ultrafine nanostructure, and uniform carbon coating, which effectively shorten the Na<jats:sup>+<\/jats:sup> diffusion pathways, prevent the aggregation and fragmentation of nanoparticles, and enhance electronic conductivity. This work is anticipated to open up a new route for activating maricite NaFePO<jats:sub>4<\/jats:sub> and advancing the development of polyanion\u2010type electrode materials.<\/jats:p>","DOI":"10.1002\/smsc.202300122","type":"journal-article","created":{"date-parts":[[2023,11,21]],"date-time":"2023-11-21T23:03:44Z","timestamp":1700607824000},"source":"Crossref","is-referenced-by-count":41,"title":["Co\u2010Manipulation of Ultrafine Nanostructure and Uniform Carbon Layer Activates Maricite\u2010Structured NaFePO<sub>4<\/sub> as a High\u2010Performance Cathode for Sodium\u2010Ion Batteries"],"prefix":"10.1002","volume":"3","author":[{"given":"Liping","family":"Zhao","sequence":"first","affiliation":[{"name":"Hefei National Research Center for Physical Sciences at the Microscale CAS Key Laboratory of Materials for Energy Conversion Department of Materials Science and Engineering University of Science and Technology of China  Hefei Anhui 230026 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