SnO_2纳米粒子/氮硫共掺杂石墨烯复合材料的合成及储锂性能
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摘要
文章通过混合溶剂热和高温煅烧相结合的方法制备了SnO_2纳米粒子/氮硫共掺杂石墨烯复合材料(SnO_2NPs/N,S-rGO)。利用XRD,SAED,SEM和(HR)TEM,XPS,CV和GCD等技术对复合材料的元素组成、空间结构以及电化学性能进行测试;在溶剂热过程中Sn~(4+)附着在石墨烯表面均匀生长形成SnO_2晶体;其与石墨烯牢固结合,保证材料结构的稳定性实现电子离子在材料内部快速传递。将其运用于电池其性能优异,在经过循环200次,电池具有较好的电化学性能(1282mAh g~(-1))。
In this paper, SnO_2 nanoparticles/nitrogen-sulfur co-doped graphene composites(SnO_2 NPs/N,S-rGO) were prepared by mixed solvothermal and high temperature calcination. XRD, SAED, SEM,(HR) TEM, XPS, CV and GCD techniques were used to test the element composition, spatial structure and electrochemical properties of the composites, and Sn~(4+) was grown uniformly on the surface of graphene to form SnO_2 crystal during solvothermal process. It is firmly combined with graphene, so as to ensure the stability of the material structure to achieve the rapid transfer of electronic ions in the material. The battery has excellent electrochemical performance(1282 mAh g~(-1)) after 200 cycles.
In this paper, SnO_2 nanoparticles/nitrogen-sulfur co-doped graphene composites(SnO_2 NPs/N,S-rGO) were prepared by mixed solvothermal and high temperature calcination. XRD, SAED, SEM,(HR) TEM, XPS, CV and GCD techniques were used to test the element composition, spatial structure and electrochemical properties of the composites, and Sn~(4+) was grown uniformly on the surface of graphene to form SnO_2 crystal during solvothermal process. It is firmly combined with graphene, so as to ensure the stability of the material structure to achieve the rapid transfer of electronic ions in the material. The battery has excellent electrochemical performance(1282 mAh g~(-1)) after 200 cycles.
引文
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[2]Q. X. Xie,et al.,Energy materials,2018,31,2452.
[3]L. Xia,et al.,Small,2016,7,853.
[4]W,Zhou,et al.,Chem. Commun,2015,51,3660.
[5]H. P. Cong, et al., Nano Energy. 2015,03,016.