新型炭材料（中英文）2024，Vol.39Issue(3)：549-560,12.DOI:10.1016/S1872-5805(24)60858-9
石油焦炭基储钠材料层间距扩大与闭孔研究
Increasing the interlayer spacing and generating closed pores to pro-duce petroleum coke-based carbon materials for sodium ion storage
摘要
Abstract
Petroleum coke(PC)is a valuable precursor for sodium-ion battery(SIB)anodes due to its high carbon content and low cost.The regulation of the microcrystalline state and pore structure of the easily-graphitized PC-based carbon is crucial for creat-ing abundant Na+storage sites.Here we used a precursor transformation strategy to increase the carbon interlayer spacing and gener-ate abundant closed pores in PC-based carbon,significantly increasing its Na+storage capacity in the plateau region.This was achieved by introducing a large number of oxygen functional groups through mixed acid treatment and then using high-temperature carbonization to decompose the oxygen functional groups and rearrange the carbon microcrystallites,resulting in a transition from open to closed pores.The optimized samples provide a large reversible capacity of 356.0 mAh g-1 at 0.02 A g-1,of which approxim-ately 93%is below 1.0 V.Galvanostatic intermittent titration(GITT)and in-situ X-ray diffraction(XRD)analysis indicate that the sodium storage capacity in the low voltage plateau region involves a joint contribution of interlayer insertion and closed pore filling processes.This study presents a comprehensive method for the development of high-performance carbon anodes using low-cost and highly aromatic precursors.关键词
钠离子电池/石油焦/炭负极/闭孔/钠离子存储Key words
Sodium ion battery/Petroleum coke/Carbon anode/Closed pore/Sodium ion storage分类
化学化工引用本文复制引用
庄洪坤,李文翠,何斌,吕家贺,王敬松,申明远,陆安慧..石油焦炭基储钠材料层间距扩大与闭孔研究[J].新型炭材料（中英文）,2024,39(3):549-560,12.基金项目
This work was financially supported by the Na-tional Natural Science Foundation of China(Nos.22075038,22209019),the Fundamental Research Funds for the Central Universities(No.DUT22LAB607),and National Key Research and De-velopment Project(2021YFA1500300). 国家自然科学基金(22075038,22209019) （Nos.22075038,22209019）
中央高校基本科研业务费(DUT22LAB607) （DUT22LAB607）
国家重点研发计划(2021YFA1500300). （2021YFA1500300）
