An alumina stabilized graphene oxide wrapped SnO2 hollow sphere LIB anode with improved lithium storage

Liu, Xiang1; Sun, Qian1; Ng, Alan M. C.1,2; Djurisic, A. B.1; Xie, Maohai1; Dai, Baohu3; Tang, Jinyao3; Surya, Charles4; Liao, Changzhong5; Shih, Kaimin5

2015

10.1039/c5ra22482a

RSC Advances   影响因子和分区

2046-2069

SnO2 hollow spheres were stabilized by graphene oxide wrapping, by alumina coating deposited via atomic layer deposition (ALD), or the combination of the two methods and used in lithium ion battery anodes. We found that graphene oxide wrapping provides a better buffering of volume changes and results in reduced electrode pulverization and better preservation of the electrode morphology compared to bare SnO2 hollow spheres. On the other hand, ALD coating provides a significant improvement in the rate performance of the anodes, and it could also improve the adhesion of the metal oxide to the conductive additive since the coating is applied to the entire electrode. The combination of the two techniques results in anodes with superior cycling and rate performance, with specific capacity of 1176 mA h g(-1) after 60 cycles at 0.1 A g(-1) (compared to 115 mA h g(-1) for bare hollow SnO2 nanospheres) and specific capacity of 329 mA h g(-1) at 2 A g(-1) charge/discharge rate (compared to 7 mA h g(-1) for bare SnO2 hollow spheres). The improvement in the performance was attributed to the superior preservation of anode morphology after cycling.

SCI ; EI

英语

其他

National Science Fund of China (NSFC)[21403103]

Chemistry

Chemistry, Multidisciplinary

WOS:000365581700048

ROYAL SOC CHEMISTRY

20154901637123

Alumina ; Aluminum oxide ; Anodes ; Atomic layer deposition ; Coatings ; Lithium-ion batteries ; Metals ; Spheres

Electron Tubes:714.1 ; Nanotechnology:761 ; Chemical Products Generally:804 ; Inorganic Compounds:804.2 ; Coating Techniques:813.1 ; Coating Materials:813.2

Web of Science

1.Univ Hong Kong, Dept Phys, Hong Kong, Hong Kong, Peoples R China
2.South Univ Sci & Technol China, Dept Phys, Shenzhen, Peoples R China
3.Univ Hong Kong, Dept Chem, Hong Kong, Hong Kong, Peoples R China
4.Hong Kong Polytech Univ, Dept Elect & Informat Engn, Kowloon, Hong Kong, Peoples R China
5.Univ Hong Kong, Dept Civil Engn, Hong Kong, Hong Kong, Peoples R China

Liu, Xiang,Sun, Qian,Ng, Alan M. C.,et al. An alumina stabilized graphene oxide wrapped SnO2 hollow sphere LIB anode with improved lithium storage[J]. RSC Advances,2015,5(122):100783-100789.

Liu, Xiang.,Sun, Qian.,Ng, Alan M. C..,Djurisic, A. B..,Xie, Maohai.,...&Shih, Kaimin.(2015).An alumina stabilized graphene oxide wrapped SnO2 hollow sphere LIB anode with improved lithium storage.RSC Advances,5(122),100783-100789.

Liu, Xiang,et al."An alumina stabilized graphene oxide wrapped SnO2 hollow sphere LIB anode with improved lithium storage".RSC Advances 5.122(2015):100783-100789.