TY - JOUR
T1 - Casting amorphorized SnO 2 /MoO 3 hybrid into foam-like carbon nanoflakes towards high-performance pseudocapacitive lithium storage
AU - Wang, Hongkang
AU - Xie, Sanmu
AU - Yao, Tianhao
AU - Wang, Jinkai
AU - She, Yiyi
AU - Shi, Jian Wen
AU - Shan, Guangcun
AU - Zhang, Qiaobao
AU - Han, Xiaogang
AU - Leung, Micheal KH
N1 - Publisher Copyright:
© 2019 Elsevier Inc.
PY - 2019/7/1
Y1 - 2019/7/1
N2 - We report an amorphorization-hybridization strategy to enhance lithium storage by casting atomically mixed amorphorized SnO 2 /MoO 3 into porous foam-like carbon nanoflakes (denote as SnO 2 /MoO 3 @CNFs, or SMC in short), which are simply prepared by annealing tin(II)/molybdenum(IV) 2-ethylhexanoate within CNFs under ambient atmosphere at a low temperature (300 °C). The SnO 2 /MoO 3 loading amount within CNFs can be easily adjusted by controlling the Sn/Mo/C precursors. When examined as lithium ion battery (LIB) anode materials, the amorphorized SnO 2 /MoO 3 @CNFs with carbon content of 32 wt% (also denote as SMC-32, in which the number represents the carbon content) deliver a high reversible capacity of 1120.5 mA h/g after 200 cycles at 200 mA/g and then 651.5 mA h/g after another 300 cycles at 2000 mA/g, which is much better than that of the crystalline SnO 2 /CNFs (carbon content of 34 wt%), MoO 3 /CNFs (carbon content of 22.7 wt%), or SnO 2 /MoO 3 @CNFs (with lower carbon contents of 11 and 25 wt%). The electrochemical measurements as well as the ex situ structure characterization clearly suggest that combination of amorphorization and hybridization of SnO 2 /MoO 3 with CNFs synergistically contributes to the superior lithium storage performance with high pseudocapacitive contribution.
AB - We report an amorphorization-hybridization strategy to enhance lithium storage by casting atomically mixed amorphorized SnO 2 /MoO 3 into porous foam-like carbon nanoflakes (denote as SnO 2 /MoO 3 @CNFs, or SMC in short), which are simply prepared by annealing tin(II)/molybdenum(IV) 2-ethylhexanoate within CNFs under ambient atmosphere at a low temperature (300 °C). The SnO 2 /MoO 3 loading amount within CNFs can be easily adjusted by controlling the Sn/Mo/C precursors. When examined as lithium ion battery (LIB) anode materials, the amorphorized SnO 2 /MoO 3 @CNFs with carbon content of 32 wt% (also denote as SMC-32, in which the number represents the carbon content) deliver a high reversible capacity of 1120.5 mA h/g after 200 cycles at 200 mA/g and then 651.5 mA h/g after another 300 cycles at 2000 mA/g, which is much better than that of the crystalline SnO 2 /CNFs (carbon content of 34 wt%), MoO 3 /CNFs (carbon content of 22.7 wt%), or SnO 2 /MoO 3 @CNFs (with lower carbon contents of 11 and 25 wt%). The electrochemical measurements as well as the ex situ structure characterization clearly suggest that combination of amorphorization and hybridization of SnO 2 /MoO 3 with CNFs synergistically contributes to the superior lithium storage performance with high pseudocapacitive contribution.
KW - Amorphorization-hybridization
KW - Foam-like carbon nanoflakes
KW - Lithium ion batteries
KW - Pseudocapacitive contribution
KW - SnO /MoO atomic scale mixture
UR - https://www.scopus.com/pages/publications/85063899908
U2 - 10.1016/j.jcis.2019.03.108
DO - 10.1016/j.jcis.2019.03.108
M3 - 文章
C2 - 30965228
AN - SCOPUS:85063899908
SN - 0021-9797
VL - 547
SP - 299
EP - 308
JO - Journal of Colloid and Interface Science
JF - Journal of Colloid and Interface Science
ER -
