TY - JOUR
T1 - Mulberry-like hollow rGO microspheres decorated with CoO nanoparticles as efficient polysulfides anchoring for Li-S batteries
AU - Wang, Xiaohu
AU - Wang, Jiayi
AU - Liu, Guihua
AU - Bakenov, Zhumabay
AU - Zhang, Yongguang
N1 - Funding Information:
This work was supported by the Program for the Outstanding Young Talents of Hebei Province, China; unhui Project of Ministry of Education of the People's Republic of China (Grant No. Z2017010 ); grant AP05133519 “Development of 3-dimensional thin film silicon based anode materials for next generation lithium-ion microbatteries” and State Targeted Program # BR05236524 from the Ministry of Education and Science of the Republic of Kazakhstan .
PY - 2020/9/15
Y1 - 2020/9/15
N2 - Lithium-sulfur batteries (LSB) became recently one of the most promising next-generation energy storage devices due to their high energy density and low cost. However, its large-scale commercial application is hindered by severe shuttle-effect and insulation of the sulfur. Herein, in order to overcome these disadvantages, mulberry-like three-dimensional hollow reduced graphene oxide microspheres modified with cobalt oxide nanoparticles (CoO/MGra) were designed as sulfur host. CoO/MGra possesses not only excellent electrical conductivity but also provides sufficiently large space for the storage of sulfur. The three-dimensional hollow structures can also significantly alleviate the volume expansion of sulfur during the cycling process. At the same time, the shuttle effect is suppressed due to the efficient chemical adsorption towards lithium polysulfide by CoO nanoparticles. As a result, excellent cycle stability (1010 mAh g−1 after 150 cycles at 0.2C) and outstanding rate performance (745 mAh g−1 at 3C) are achieved when using the S-CoO/MGra cathode.
AB - Lithium-sulfur batteries (LSB) became recently one of the most promising next-generation energy storage devices due to their high energy density and low cost. However, its large-scale commercial application is hindered by severe shuttle-effect and insulation of the sulfur. Herein, in order to overcome these disadvantages, mulberry-like three-dimensional hollow reduced graphene oxide microspheres modified with cobalt oxide nanoparticles (CoO/MGra) were designed as sulfur host. CoO/MGra possesses not only excellent electrical conductivity but also provides sufficiently large space for the storage of sulfur. The three-dimensional hollow structures can also significantly alleviate the volume expansion of sulfur during the cycling process. At the same time, the shuttle effect is suppressed due to the efficient chemical adsorption towards lithium polysulfide by CoO nanoparticles. As a result, excellent cycle stability (1010 mAh g−1 after 150 cycles at 0.2C) and outstanding rate performance (745 mAh g−1 at 3C) are achieved when using the S-CoO/MGra cathode.
KW - CoO
KW - Hierarchical structure
KW - Hollow graphene sphere
KW - Lithium-sulfur battery
KW - Spray drying
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U2 - 10.1016/j.jelechem.2020.114375
DO - 10.1016/j.jelechem.2020.114375
M3 - Article
AN - SCOPUS:85087389750
VL - 873
JO - Journal of Electroanalytical Chemistry
JF - Journal of Electroanalytical Chemistry
SN - 1572-6657
M1 - 114375
ER -