文献类型：期刊文献

英文题名：Achieving high plateau capacity hard carbon via Flash Joule Heating-Enabled synergistic optimization of interlayer spacing and closed pore

作者：Chen, Jiajia[1,2,3];Pan, Weitong[1,2,3];Wei, Bing[1,2,3];Chen, Wangui[1,2,3];Yue, Chengyan[1,2,3];Zhao, Lili[1,2,3];Tang, Longfei[1,2,3];Ding, Lu[1,2,3];Chen, Xueli[1,2,3];Wang, Fuchen[1,2,3]

机构：[1]East China Univ Sci & Technol, Inst Clean Coal Technol, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Engn Res Ctr Resource Utilizat Carbon containing W, Minist Educ, Shanghai 200237, Peoples R China;[3]East China Univ Sci & Technol, State Key Lab Coal Liquefact, Gasificat & Utilizat High Efficiency & Low Carbon, Shanghai 200237, Peoples R China

年份：2026

卷号：260

外文期刊名：CARBON

收录：;EI(收录号：20263321280977);Scopus(收录号：2-s2.0-105046949179);WOS:【SCI-EXPANDED(收录号:WOS:001850007700001)】；

基金：The research is supported by Fundamental Research Funds for the Central University (JKB01261715) .

语种：英文

外文关键词：Expanded interlayer spacing; Closed pore; Thermal pulse width; High plateau capacity; Carbon network reconstruction

摘要：Enhancing the plateau capacity is the key to improving hard carbon anode performance. Nevertheless, prevailing research efforts are primarily centered on engineering the closed-pore structure, significantly neglecting the synergistic control of carbon interlayer spacing. Especially, conventional slow pyrolysis typically leads to closedpore development concurrent with over-graphitization, posing a major obstacle to synergistically achieving both expanded interlayer spacing and optimal closed porosity in hard carbon. Based on the Flash Joule Heating (FJH) technique, this study proposes a kinetic regulation strategy to synthesize hard carbons with high plateau capacity by precisely modulation of thermal pulse width. Optimal pulse width treatment (100 s) enables selective defect repair and carbon microcrystals rearrangement, producing a composite hard carbon characterized by expanded interlayer spacing (0.3980 nm) and abundant, optimal sized closed pores. Compared to the sample prepared by conventional tube furnace heating at an identical carbonization temperature, the optimized material demonstrates an outstanding reversible specific capacity of 324.4 mAh g(-1) with an initial Coulombic efficiency of 89.5%. Further analysis indicates that the high reversible plateau capacity (193.2 mAh g(-1)) is contributed collectively by intercalation and closed-pore filling mechanisms. Moreover, the electrode demonstrates excellent structural stability, with 90.3% of its capacity retained after 230 cycles at 30 mA g(-1). This straightforward and effective strategy for modulating the carbonization process provides rational guidance for engineering hard carbon structures with high plateau capacity.