Porous SnO2 nanostructure with a high specific surface area for improved electrochemical performance. Issue 18 (11th March 2020)

• Record Type: Journal Article
• Authors: Kim, Hyeona; Kim, Min-Cheol; Kim, Sung-beom; Kim, Yo-Seob; Choi, Jin-Hyeok; Park, Kyung-Won
• Is Part Of: RSC advances. Volume 10:Issue 18(2020)
• Page Start: 10519
• Page End: 10525
• Publication Date: 2020-03-11
• Subjects: Chemistry -- Periodicals; 540.5
• DOI: 10.1039/d0ra00531b
• Languages: English
• ISSNs: 2046-2069

Abstract

Abstract : A porous SnO2 nanostructure as an anode active material showed significantly improved electrochemical performance. Abstract : Tin oxide (SnO2 ) has been attractive as an alternative to carbon-based anode materials because of its fairly high theoretical capacity during cycling. However, SnO2 has critical drawbacks, such as poor cycle stability caused by a large volumetric variation during the alloying/de-alloying reaction and low capacity at a high current density due to its low electrical conductivity. In this study, we synthesized a porous SnO2 nanostructure (n-SnO2 ) that has a high specific surface area as an anode active material using the Adams fusion method. From the Brunauer–Emmett–Teller analysis and transmission electron microscopy, the as-prepared SnO2 sample was found to have a mesoporous structure with a fairly high surface area of 122 m 2 g −1 consisting of highly-crystalline nanoparticles with an average particle size of 5.5 nm. Compared to a commercial SnO2, n-SnO2 showed significantly improved electrochemical performance because of its increased specific surface area and short Li + ion pathway. Furthermore, during 50 cycles at a high current density of 800 mA g −1, n-SnO2 exhibited a high initial capacity of 1024 mA h g −1 and enhanced retention of 53.6% compared to c-SnO2 (496 mA h g −1 and 23.5%).