硅/石墨烯/碳复合材料的制备及其储锂性能研究
|
摘要
通过氧化、PDDA-PSS-PDDA改性、包覆石墨烯、复合对苯二胺、800℃碳化,从而制得硅/石墨烯/碳复合材料,并对其形貌及性能进行了研究。结果表明,石墨烯含量为200mL时,制备的复合材料作为锂离子电池负极材料表现出良好的电化学性能,首次可逆充电比容量为957.2mAh/g,循环100次后,比容量可稳定在761.0mAh/g。
Silicon/graphene/carbon composites were prepared by oxidation,PDDA-PSS-PDDA modification,graphene cladding,ursol compounding and carbonization at 800℃.The structure and performance of composites were studied.The results showed that when the graphene content was 200 mL,the composites had good electrochemical performance as cathode material for lithium ion batteries.The first discharge capacity of composite was 957.2 mAh/g,and after 100 cycles it remained the capacity of 761.0 mAh/g.
Silicon/graphene/carbon composites were prepared by oxidation,PDDA-PSS-PDDA modification,graphene cladding,ursol compounding and carbonization at 800℃.The structure and performance of composites were studied.The results showed that when the graphene content was 200 mL,the composites had good electrochemical performance as cathode material for lithium ion batteries.The first discharge capacity of composite was 957.2 mAh/g,and after 100 cycles it remained the capacity of 761.0 mAh/g.
引文
[1]Kovalenko I,Zdyrko B,Magasinski A,et al.A major constituent of brown algae for use in high-capacity Li-ion batteries[J].Science,2011,334(6052):75-79.
[2]Chan C K,Peng H,Liu G,et al.High-performance lithium battery anodes using silicon nanowires[J].Nature Nanotechnology,2008,3(1):31-35.
[3]Ng S H,Wang J,Wexler D,et al.Highly reversible lithium storage in spheroidal carbon-coated silicon nanocomposites as anodes for lithium-ion batteries[J].Angewandte Chemie International Edition,2006,45(41):6896-6899.
[4]Chou S L,Wang J Z,Choucair M,et al.Enhanced reversible lithium storage in a nanosize silicon/grapheme composite[J].Electrochemical Communication,2010,12:303-306.
[5]Wu H,Yi C.Designing nanostructured Si anodes for high energy lithium ion batteries[J].Nano Toady,2012(7):414-429.
[6]Shao D,Tang D P,Mai Y J,et al.Nanostructured silicon/porous carbon spherical composite as a high capacity anode for Li-ion batteries[J].J Mater Chem A,2013,1(47):15068-15075.
[7]Yue L,Zhang W,Yang J,et al.Designing Si/porous-C composite with buffering voids as high capacity anode for lithiumion batteries[J].Electrochimica Acta,2014,125(12):206-217.
[8]Yue L,Zhong H,Tang D,et al.Porous Si coated with S-doped carbon as anode material for lithium ion batteries[J].Journal of Solid State Electrochemistry,2013,17(4):961-968.
[9]Zhang W,Wu L,Du L,et al.Layer-by-layer assembly modification to prepare firmly bonded Si-graphene composites for high-performance anodes[J].Rsc Advances,2016,6(6):4835-4842.
[10]杨晓武,李晓叶.碳硅复合电极材料在锂离子电池中的应用研究[J].电源技术,2017(12):1688-1690.
[2]Chan C K,Peng H,Liu G,et al.High-performance lithium battery anodes using silicon nanowires[J].Nature Nanotechnology,2008,3(1):31-35.
[3]Ng S H,Wang J,Wexler D,et al.Highly reversible lithium storage in spheroidal carbon-coated silicon nanocomposites as anodes for lithium-ion batteries[J].Angewandte Chemie International Edition,2006,45(41):6896-6899.
[4]Chou S L,Wang J Z,Choucair M,et al.Enhanced reversible lithium storage in a nanosize silicon/grapheme composite[J].Electrochemical Communication,2010,12:303-306.
[5]Wu H,Yi C.Designing nanostructured Si anodes for high energy lithium ion batteries[J].Nano Toady,2012(7):414-429.
[6]Shao D,Tang D P,Mai Y J,et al.Nanostructured silicon/porous carbon spherical composite as a high capacity anode for Li-ion batteries[J].J Mater Chem A,2013,1(47):15068-15075.
[7]Yue L,Zhang W,Yang J,et al.Designing Si/porous-C composite with buffering voids as high capacity anode for lithiumion batteries[J].Electrochimica Acta,2014,125(12):206-217.
[8]Yue L,Zhong H,Tang D,et al.Porous Si coated with S-doped carbon as anode material for lithium ion batteries[J].Journal of Solid State Electrochemistry,2013,17(4):961-968.
[9]Zhang W,Wu L,Du L,et al.Layer-by-layer assembly modification to prepare firmly bonded Si-graphene composites for high-performance anodes[J].Rsc Advances,2016,6(6):4835-4842.
[10]杨晓武,李晓叶.碳硅复合电极材料在锂离子电池中的应用研究[J].电源技术,2017(12):1688-1690.