文献类型：期刊文献

英文题名：Sulfonation-crosslinking enabled thiophenic sulfur anchoring and tailored porosity in hard carbon anodes for high-rate sodium-ion storage

作者：Yue, Chengyan[1,2,3];Pan, Weitong[1,2,3];Wei, Bing[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, Shanghai 200237, Peoples R China

年份：2026

卷号：254

外文期刊名：CARBON

收录：;EI(收录号：20261220299741);WOS:【SCI-EXPANDED(收录号:WOS:001723527900001)】；

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

语种：英文

外文关键词：Acid-induced sulfonation-crosslinking; Pore structure engineering; Thiophenic sulfur doping; Hierarchical pores hard carbon; Sodium-ion battery

摘要：Sulfur doping has been recognized as an effective strategy to enhance the sodium-storage performance by improving electronic conductivity and surface reactivity. However, existing studies often neglect the structural instability and uncontrolled pore evolution during carbonization, leading to limited plateau capacity and insufficient rate capability. We herein propose an acid-induced sulfonation-crosslinking strategy that transforms the polyphenylene sulfide (PPS)-coated composite precursor into hard carbon anodes concurrently featuring chemically anchored thiophenic sulfur and a synergistic dual-mode pore system. On one hand, inter-chain dehydration and crosslinking reinforce the polymer network and suppress random scission during thermal treatment, which yields uniform micropores (similar to 0.5 nm) and contribute to the low-potential plateau capacity. On the other hand, the decomposition of thermolabile -SO3H groups releases gases (e.g., SO2/H2O). The gentle in-situ etching creates well-connected mesoporous network (2 similar to 10 nm), thereby drastically reducing ion-transport polarization and enabling high-rate performance. Consequently, the precisely-tailored porosity ensures fast Na+ diffusion (DNa+ > 4.53 & times; 10(-10) cm(2) s(-1)) and superior rate capability. The anode maintains a high capacity of 260 mAh g(-1) even at 1 A g(-1), demonstrating excellent high-rate performance and outstanding capacity recovery when the current rate is reduced, delivering up to 330 mAh g(-1) upon returning to 0.06 A g(-1).