新型炭材料（中英文）2026，Vol.41Issue(2)：365-378,14.DOI:10.1016/S1872-5805(26)61068-2
激光合成的亚稳态铋纳米晶与还原氧化石墨烯化学键合实现优异的储锂性能
Laser-synthesized metastable bismuth nanocrystals chemically bonded to reduced graphene oxide for excellent lithium storage
摘要
Abstract
The poor interface contact between Bi nanoparticles and reduced graphene oxide(rGO)hinders the transfer of ions/electrons for lithium-ion batteries.We propose an innovative approach for fab-ricating ultrafine bismuth nanocrystals chemically bonded to reduced graphene oxide(Bi-rGO)by li-quid-phase pulsed laser irradiation followed by a sol-vothermal reaction with graphene oxide.Metastable Bi nanocrystals synthesized by a laser(5.5 nm)are then combined with graphene oxide in a solvotherm-al process,undergoing lattice restructuring and shrinking to a record-small size of 2 nm,which is the smallest reported for Bi/C composites as far as we know.The Bi nanocrystals are uniformly anchored onto rGO nanosheets by strong Bi—O—C bonds,which not only suppress particle aggregation but also establish efficient ion/electron transport channels and alleviate volume expansion during lithiation.As a result,the Bi-rGO-2 anode consisting of 2 nm Bi nanocrystals has an exceptional reversible capacity of 586.7 mAh g-1 over 500 cycles under a current density of 100 mA·g-1,nearly doubling that of a Bulk Bi/rGO composite anode(318 mAh·g-1).Theoretical calculations confirm a higher binding energy between Bi and rGO at small particle sizes,while kinetic analysis reveals accelerated Li+diffusion.This work provides a scalable way to design high-performance alloy anodes through metastable nanocrystal engineering and covalent in-terface coupling.关键词
激光辐照技术/亚稳态铋纳米晶体/还原氧化石墨烯/界面相容性/锂存储Key words
Laser irradiation technology/Metastable Bi nanocrystals/Reduced graphene oxide/Interface compatibility/Lithium storage分类
化学化工引用本文复制引用
苏延霞,张秀海,邱玉倩,班渺寒,张谨博,李崇,徐飞,王洪强..激光合成的亚稳态铋纳米晶与还原氧化石墨烯化学键合实现优异的储锂性能[J].新型炭材料（中英文）,2026,41(2):365-378,14.基金项目
This work was supported by the National Key R&D Program of China(2024YFB4607600,2025YFE0119700),the National Natural Science Foundation of China(52322203,52473220),the Fun-damental Research Funds for the Central Universities,and the Key Research and Development Program of Xianyang City(L2024-ZDYF-ZDYF-GY-0011). 国家重点研发计划(2024YFB4607600,2025YFE0119700)、国家自然科学基金(52322203,52473220)、中央高校基本科研业务费咸阳市重点研发计划(L2024-ZDYF-ZDYF-GY-0011). （2024YFB4607600,2025YFE0119700）
