{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,21]],"date-time":"2026-09-21T23:50:51Z","timestamp":1790034651727,"version":"4.0.1"},"reference-count":30,"publisher":"Wiley","issue":"10","license":[{"start":{"date-parts":[[2025,12,23]],"date-time":"2025-12-23T00:00:00Z","timestamp":1766448000000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"},{"start":{"date-parts":[[2025,12,23]],"date-time":"2025-12-23T00:00:00Z","timestamp":1766448000000},"content-version":"tdm","delay-in-days":0,"URL":"http:\/\/doi.wiley.com\/10.1002\/tdm_license_1.1"}],"funder":[{"DOI":"10.13039\/501100001809","name":"National Natural Science Foundation of China","doi-asserted-by":"publisher","award":["52274309"],"award-info":[{"award-number":["52274309"]}],"id":[{"id":"10.13039\/501100001809","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Small"],"published-print":{"date-parts":[[2026,2]]},"abstract":"<jats:title>ABSTRACT<\/jats:title>\n                  <jats:p>\n                    Iron\u2010based polyanionic compounds Na\n                    <jats:sub>4<\/jats:sub>\n                    Fe\n                    <jats:sub>3<\/jats:sub>\n                    (PO\n                    <jats:sub>4<\/jats:sub>\n                    )(P\n                    <jats:sub>2<\/jats:sub>\n                    O\n                    <jats:sub>7<\/jats:sub>\n                    ) (NFPP) have attracted attention for its crystal structure and 3D sodium ion transport channels. However, structural degradation caused by [P\n                    <jats:sub>2<\/jats:sub>\n                    O\n                    <jats:sub>7<\/jats:sub>\n                    ] dimer distortion during deep desodiation severely compromises its electrochemical performance. In this study, the Aluminum (Al) atoms are selected to precisely enhance the bond covalency and modulate the electronic rearrangement of Fe\u2500O chemical bonds, significantly strengthening the FeO\n                    <jats:sub>6<\/jats:sub>\n                    octahedron and therefore mitigating the structural distortion of [P\n                    <jats:sub>2<\/jats:sub>\n                    O\n                    <jats:sub>7<\/jats:sub>\n                    ] dimer in deep desodiation. This similarly promotes the electronic conductivity and the intrinsic sodium ion transport dynamics in the sodium\u2010poor states. As expected, the optimized Na\n                    <jats:sub>3.9<\/jats:sub>\n                    Fe\n                    <jats:sub>2.9<\/jats:sub>\n                    Al\n                    <jats:sub>0.1<\/jats:sub>\n                    (PO\n                    <jats:sub>4<\/jats:sub>\n                    )\n                    <jats:sub>2<\/jats:sub>\n                    (P\n                    <jats:sub>2<\/jats:sub>\n                    O\n                    <jats:sub>7<\/jats:sub>\n                    ) (NFPP\u2010Al) cathode demonstrates a remarkable specific capacity of 115.2 mAh\u00a0g\n                    <jats:sup>\u22121<\/jats:sup>\n                    at 0.2 C and exceptional cycling stability with 80.4% capacity retention after 4000 cycles at 10 C. Furthermore, the minimal volume change (2.8%) within the solid solution reaction of sodium storage mechanism emphasizes the stabilized octahedra and attenuated dimer aberration. This work provides insights into the relationship between chemical bond regulation and structural stability under deep desodiation, offering theoretical guidance for developing long\u2010term stability iron\u2010based phosphate cathodes.\n                  <\/jats:p>","DOI":"10.1002\/smll.202513009","type":"journal-article","created":{"date-parts":[[2025,12,23]],"date-time":"2025-12-23T11:37:01Z","timestamp":1766489821000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":4,"title":["Regulating Chemical Bond to Stabilize Deep Desodiation of Iron\u2010Based Phosphate Cathodes for Durable Sodium Storage"],"prefix":"10.1002","volume":"22","author":[{"given":"Xu","family":"Wang","sequence":"first","affiliation":[{"name":"School of Metallurgy and Environment Hunan Provincial Key Laboratory of Nonferrous Value\u2010Added Metallurgy Engineering Research Center of the Ministry of Education for Advanced Battery Materials Central South University  Changsha P. R. China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Liang","family":"He","sequence":"additional","affiliation":[{"name":"School of Metallurgy and Environment Hunan Provincial Key Laboratory of Nonferrous Value\u2010Added Metallurgy Engineering Research Center of the Ministry of Education for Advanced Battery Materials Central South University  Changsha P. R. China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Xiaochen","family":"Ge","sequence":"additional","affiliation":[{"name":"School of Metallurgy and Environment Hunan Provincial Key Laboratory of Nonferrous Value\u2010Added Metallurgy Engineering Research Center of the Ministry of Education for Advanced Battery Materials Central South University  Changsha P. R. China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jiahao","family":"Gu","sequence":"additional","affiliation":[{"name":"School of Metallurgy and Environment Hunan Provincial Key Laboratory of Nonferrous Value\u2010Added Metallurgy Engineering Research Center of the Ministry of Education for Advanced Battery Materials Central South University  Changsha P. R. China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Wen","family":"Zhou","sequence":"additional","affiliation":[{"name":"School of Metallurgy and Environment Hunan Provincial Key Laboratory of Nonferrous Value\u2010Added Metallurgy Engineering Research Center of the Ministry of Education for Advanced Battery Materials Central South University  Changsha P. R. China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yanqing","family":"Lai","sequence":"additional","affiliation":[{"name":"School of Metallurgy and Environment Hunan Provincial Key Laboratory of Nonferrous Value\u2010Added Metallurgy Engineering Research Center of the Ministry of Education for Advanced Battery Materials Central South University  Changsha P. R. China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-8691-6006","authenticated-orcid":false,"given":"Zhian","family":"Zhang","sequence":"additional","affiliation":[{"name":"School of Metallurgy and Environment Hunan Provincial Key Laboratory of Nonferrous Value\u2010Added Metallurgy Engineering Research Center of the Ministry of Education for Advanced Battery Materials Central South University  Changsha P. R. 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