第12卷第6期2023年6月Vol.12No.6Jun.2023储能科学与技术EnergyStorageScienceandTechnology不同碳含量对SiO/C负极电化学性能的影响张慎然,徐立环,苏畅(沈阳化工大学化学工程学院,辽宁沈阳110142)摘要:合理的碳包覆层对SiO负极材料性能的提升至关重要,但是有关碳含量与电极电化学性能之间的内在联系尚未有深入的研究。本工作利用化学气相沉积(CVD)技术制备了不同碳含量的SiO/C负极材料,深入研究发现当碳含量(质量分数)为5%左右时,复合材料的电化学性能表现最优,这归因于该碳含量下材料的锂离子传输效率相对较高;进一步研究发现,当CVD过程的碳含量继续增加时,沉积碳的无序结构占比较大,虽然导电性有所提升,但是原本供锂离子传输的空隙被大量堵塞,极大影响了电极反应动力学。所制备的SiO/C-2电极表现出最优异的循环性能,在经历100个循环后仍然具有1350mAh/g的可逆容量。关键词:SiO;碳材料;负极;电化学;界面;化学气相沉积doi:10.19799/j.cnki.2095-4239.2023.0184中图分类号:TM911.1文献标志码:A文章编号:2095-4239(2023)06-1784-10InfluenceofdifferentcarboncontentsontheelectrochemicalperformanceofSiO/CanodeZHANGShenran,XULihuan,SUChang(CollegeofChemicalEngineering,ShenyangUniversityofChemicalTechnology,Shenyang110142,Liaoning,China)Abstract:CarboncoatingisessentialfortheperformanceofSiOanodematerials;however,theintrinsiclinkbetweencarboncontentandelectrodeelectrochemicalperformancehasnotbeenstudiedindepth.Herein,SiO/Canodematerialswithdifferentcarboncontentswerepreparedusingchemicalvapordeposition(CVD)technology.Thestudyfoundthatwhenthecarboncontentwasabout5%,theelectrochemicalperformanceofthecompositematerialswasthebestbecausetheyhadafastlithium-iontransportchannel.FurtherresearchfoundthatwhenthecarboncontentoftheCVDprocesscontinuedtoincrease,carbonmaterialswithdisorderedstructuresaccountedforalargeproportion.Althoughtheelectricalconductivitywasimproved,thegapsoriginallyavailableforlithium-iontransportwereheavilyblocked,whichgreatlyaffectedthekineticreactionrateoftheelectrode.ThepreparedSiO/C-2electrodeshowedexcellentcyclingperformance,withareversiblecapacityof1350mAh/gafter100cycles.Keywords:siliconoxide;carbon;an...