文献类型：期刊文献

英文题名：Tuning the Mesopore Structure of Polyethylene Glycol Terephthalate (PET)-Derived Hard Carbon for High-Capacity Sodium-Ion Batteries

作者：Wang, Chupeng[1];Luo, Mingsheng[1];Song, Shiqi[1];Tang, Maochong[1];Wang, Xiaoxia[2];Liu, Hui[3]

机构：[1]East China Univ Sci & Technol, Sch Mat Sci & Engn, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Sch Mech & Power Engn, Shanghai 200237, Peoples R China;[3]Zhuguangya Inst Adv Sci & Technol, Shanghai 201306, Peoples R China

年份：2025

卷号：18

期号：5

外文期刊名：MATERIALS

收录：;EI(收录号：20251118048976);WOS:【SCI-EXPANDED(收录号:WOS:001442736300001)】；

基金：This research was funded by the Xizang Autonomous Region Science and Technology Plan Project (XZ202402ZY0014 and XZ202401ZY0067).

语种：英文

外文关键词：hard carbon; sodium-ion batteries; PET plastic waste; mesopore

摘要：Hard carbon (HC) is considered to be a highly promising anode material for sodium-ion batteries. However, the synthesis conditions and pore structure regulation are still challenging for high-capacity sodium-ion storage. In this study, HCs using polyethylene glycol terephthalate (PET) as a carbon resource and ZnO as a nanopore template were synthesized and systematically investigated. By optimizing the additive amount of zinc gluconate, the starting material for ZnO, PET-derived HCs with a proper mesoporous structure were obtained. The as-prepared hard carbon demonstrated a high reversible capacity of 389.42 mAhg-1 at 20 mAg-1, with the plateau capacity accounting for 68%. After 75 cycles, the discharge capacity stabilized at 367.73 mAhg-1 with a retention ratio of 89.4%. The rate performance test indicated that a proper mesopore structure helped to improve the sodium-ion diffusion coefficient, effectively enhancing the charge-storage kinetics. This work provides a promising strategy for converting PET into valuable carbon materials for application in the field of renewable energy technology.