Preparation of CoSnO3/CNTs/S and its Electrochemical Performance as Cathode Material for Lithium‐Sulfur Batteries. Issue 20 (20th October 2020)

• Record Type: Journal Article
• Authors: Chen, Jiale; Bian, Zhengxu; Wu, Mengrong; Gao, Mingyue; Shi, Jing; Duan, Mengting; Guo, Xingmei; Liu, Yuanjun; Zhang, Junhao; Kong, Qinghong
• Is Part Of: ChemElectroChem. Volume 7:Issue 20(2020)
• Page Start: 4209
• Page End: 4217
• Publication Date: 2020-10-20
• Subjects: CoSnO3 cubes -- carbon nanotube networks -- excellent cycling stability -- lithium-sulfur battery; Electrochemistry -- Periodicals; 541.37
• DOI: 10.1002/celc.202001081
• Languages: English
• ISSNs: 2196-0216

Abstract

Abstract: To address low electrical conductivity of sulfur and "poly‐sulfide shuttle" for constructing sulfur hosts with excellent cyclic stability, CoSnO3 /CNTs composites are successfully synthesized by combining CoSnO3 cubes and carbon nanotubes (CNTs) via coprecipitation and annealing process. CoSnO3 cubes are bound by continuous carbon nanotube networks, with high specific surface area and vast mesoporous. CoSnO3 with multiple polar active sites has a strong chemical adsorption effect on lithium polysulfide, suppressing the shuttle effect. The carbon nanotubes have continuous conductive networks, which can provide physical confinement with polysulfides and good electrical conductivity. Through the effective combination of advantages of CoSnO3 and carbon nanotubes, CoSnO3 /CNTs/S exhibits excellent sulfur storage performance. The maximum discharge capacity of CoSnO3 /CNTs/S is 453.3 mAh g −1 at a current density of 0.2 C. After 500 cycles, the discharge specific capacity is still 377.7 mAh g −1 . The simple synthesis of CoSnO3 /CNTs/S with long cycle life provides a new direction for the future LSBs cathode material research. Abstract : Stop the shuttle : CoSnO3 /CNTs composites are synthesized by combining CoSnO3 cubes and carbon nanotubes (CNTs) via coprecipitation and annealing process. CoSnO3 contain multiple polar active sites has a strong chemical adsorption effect on lithium polysulfide, suppressing the shuttle effect. The CNTs have continuous conductive networks, which can provide physical confinement with polysulfides and good electrical conductivity. CoSnO3 /CNTs/S exhibits excellent sulfur storage performance.