化工进展2024，Vol.43Issue(6)：3209-3220,12.DOI:10.16085/j.issn.1000-6613.2023-0753
B掺杂多孔碳纳米片的制备及其储锂性能
Preparation of B-doped porous carbon nanosheets and their lithium storage performance
摘要
Abstract
Anode materials are one of the critical factors affecting the electrochemical performance of lithium-ion batteries(LIBs).Pore structure modulation and heteroatom doping effectively improve the electrochemical performance of anode materials.In this paper,coal-based carbon nanosheets(CS)were prepared by using lignite as a precursor chemical oxidation method.Then B-doped porous carbon nanosheets(BPCS)were obtained using boron oxide(B2O3)as an additive.The microstructures of CS and BCPS were characterized by scanning electron microscopy(SEM),transmission electron microscope(TEM),X-ray diffraction(XRD),Raman spectroscopy(Raman),nitrogen adsorption-desorption and X-ray photoelectron spectroscopy(XPS),and the electrochemical properties of CS and BPCS as anode materials for LIBs were investigated.The results showed that B2O3 had triple functions of template,pore-making and doping.When the dosage of B2O3 was 0.5g,BPCS-0.5 exhibited a three-dimensional porous structure with a specific surface area of 1216.20m2/g,a total pore volume of 1.027cm3/g,and content of B atom of 4.20%.The porous structure of BPCS-0.5 provided sufficient space and channels for ion storage and transport,and the introduction of B element increased the surface chemical activity of BPCS,which enhanced the lithium storage performance.When BPCS-0.5 as anode material of LIBs,the first reversible capacity reached 826mA·h/g at a current density of 0.05A/g and the reversible capacity still reached 143mA·h/g at a high current density of 5A/g,and the capacity retention rate of 500 cycles was 172%,indicating that the anode materials had high lithium storage capacity and excellent cycle life.关键词
褐煤/B掺杂/多孔碳纳米片/锂离子电池/电化学性能Key words
lignite/boron-doped/porous carbon nanosheets/lithium-ion batteries/electrochemical performance分类
化学化工引用本文复制引用
孙悦,谌伦建,张越,张文豪,邢宝林,张耀杰,冯来宏,曾会会,蒋振东,徐冰,贾建波,张传祥..B掺杂多孔碳纳米片的制备及其储锂性能[J].化工进展,2024,43(6):3209-3220,12.基金项目
国家自然科学基金(52274261,52074109) （52274261,52074109）
国家级大学生创新创业训练计划(202110460011,S202110460065). （202110460011,S202110460065）
