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However, their significant volume expansion (&gt;300%) and inherently poor electrical conductivity limit their large\u2010scale application. In this study, an innovative synergistic design approach was employed to propose a nickel (Ni)\u2010doped hollow carbon\u2010coated silicon composite material (Ni\/HSi@C). This material integrates structural engineering with a carbon layer coating the hollow silicon structure, thereby facilitating volume changes toward internal expansion. Additionally, phase state regulation and interface optimization were integrated, with Ni\u2010doping introduced to promote the formation of amorphous silicon while inducing the formation of a stable solid electrolyte interface film rich in LiF during charge\u2013discharge cycles, thereby achieving synergistic optimization. Experimental results indicate that after 1000 cycles at a current density of 1000\u00a0mA g\n                    <jats:sup>\u22121<\/jats:sup>\n                    , the specific capacity of Ni\/HSi@C remains at 1318\u00a0mAh\u00a0g\n                    <jats:sup>\u22121<\/jats:sup>\n                    . Furthermore, the pouch cell achieves an energy density of 379\u00a0Wh\u00a0kg\n                    <jats:sup>\u22121<\/jats:sup>\n                    . In situ impedance and distribution of relaxation times analysis demonstrate that Ni\u2010doping significantly reduces interfacial impedance and suppresses electrolyte decomposition.\n                  <\/jats:p>","DOI":"10.1002\/smll.202512633","type":"journal-article","created":{"date-parts":[[2026,1,12]],"date-time":"2026-01-12T14:58:54Z","timestamp":1768229934000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":2,"title":["Nickel\u2010Doping Modified Interface Synergized With Hollow Confinement Constructs Highly Stable Silicon Anodes for Long Cycling Lithium\u2010Ion Batteries"],"prefix":"10.1002","volume":"22","author":[{"given":"Zhong","family":"Xiao","sequence":"first","affiliation":[{"name":"Key Laboratory of Superlight Materials and Surface Technology College of Material Sciences and Chemical Engineering Ministry of Education Harbin Engineering University  Harbin P. R. 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