化工学报2025，Vol.76Issue(2)：846-857,12.DOI:10.11949/0438-1157.20240928
NaCl辅助构筑高性能沥青基硬炭负极材料
NaCl assisted constructing high-performance pitch-based hard carbon anode material
摘要
Abstract
Petroleum asphalt has the advantages of low price,high aromaticity and easy polycondensation,and is an ideal precursor for the preparation of high-additive hard carbon anode materials.However,the aromatic hydrocarbons and alkane in petroleum asphalt are prone to condensation and rearrangement during its direct carbonization,and resulting in high graphitization,small layer spacing coupled with few defect sites,which lead to a poor sodium-ion storage performance.Therefore,this work proposes to introduce NaCl pro-oxygenic agent into the asphalt pre-oxidation process for promoting oxidative cross-linking reaction,inhibiting the rearrangement of the asphalt molecular structure,which can reduce the graphitization degree of hard carbon,expand the layer spacing,and introduce abundant C=O groups and closed-pore structures,thereby enhancing the sodium-ion storage performance of the pitch-based hard carbon anode.This asphalt-based hard carbon anode delivers high specific capacities of 285.0 and 145.0 mAh·g-1 at 30 and 300 mA·g-1,respectively,coupled with 96.3%initial coulombic efficiency.Meanwhile,it has a high plateau capacity of 173.2 mAh·g-1 at 30 mA·g-1,corresponding to 61.4%of the total specific capacity.In addition,the capacity retention rate of this anode is as high as 93.94%for 200 cycles at 0.1 A·g-1,demonstrating an excellent cycling stability performance.关键词
NaCl辅助预氧化/石油沥青/硬炭负极/钠离子电池/电化学性能Key words
NaCl-assisted pre-oxidation/petroleum asphalt/hard carbon anode/sodium-ion battery/electrochemical performance分类
化学化工引用本文复制引用
肖志华,房浩楠,郑方植,孙冬,陶丽达,李永峰,徐春明,马新龙..NaCl辅助构筑高性能沥青基硬炭负极材料[J].化工学报,2025,76(2):846-857,12.基金项目
中国石油大学(北京)校青年拔尖人才科研启动基金项目(ZX20230047) （北京）
国家自然科学基金青年基金项目(22408399) （22408399）
国家自然科学基金项目(22238012) （22238012）
