新型炭材料（中英文）2025，Vol.40Issue(6)：1279-1291,13.DOI:10.1016/S1872-5805(25)61007-9
乳化体系中氧化石墨烯调控硬炭闭孔结构用于钠离子电池负极
Increasing the closed-pore volume in hard carbons for sodium-ion bat-teries by the addition of graphene oxide in an emulsion system
摘要
Abstract
The demand for high-energy-density sodium-ion batteries has driven research to increase the hard carbon(HC)plateau capacity(<0.1 V),but the plateau capacity-rate capabil-ity trade-off limits performance.We report a way to regulate the closed pore structure and improve the rate capability of HC by the addition of graphene oxide using an emulsification pro-cess.In a non-emulsion system,graphene oxide not only shortens ion diffusion paths by inducing the formation of flake-like HC but also significantly improves the rate performance by serving as conductive bridges within the carbon matrix.The prepared graphene/phenolic resin carbon composite has revers-ible capacities of 362,340,319,274,119,86,69 and 48 mAh g-1 at current densities of 0.02,0.05,0.1,0.2,0.5,1,2 and 5 A g-1,respectively.When emulsification is introduced,the graphene oxide acts as a nano-confinement template,guiding the cross-linking of phenolic resin to form uniformly sized closed pores.This composite electrode material has the highest plateau capacity of 268 mAh g-1 at 20 mA g-1.关键词
闭孔/硬炭/氧化石墨烯/钠离子电池/硬炭结构Key words
Closed pore/Hard carbon/Graphene oxide/Sodium ion batteries/Hard carbon structure分类
化学化工引用本文复制引用
LI Xiao-tian,CHEN Xiao-hong,SONG Huai-he,YUAN Ren-lu,ZHANG Jia-yao,ZHANG Jia-peng,GUO Lie-wen,ZHANG Hong-chuan,LIU Hai-yan,LI Ang,FAN Cheng-wei..乳化体系中氧化石墨烯调控硬炭闭孔结构用于钠离子电池负极[J].新型炭材料（中英文）,2025,40(6):1279-1291,13.基金项目
This work is financially supported by the Nation-al Natural Science Foundation of China(52172036 and U1610252),and the Taishan Industrial Experts Program(tscx202306116). 国家自然科学基金(52172036和U1610252) （52172036 and U1610252）
泰山产业领军人才工程(tscx202306116)提供资金支持. （tscx202306116）
