Journal
CARBON
Volume 198, Issue -, Pages 80-90Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.carbon.2022.06.073
Keywords
Yolk-double shells; Gradient; Hierarchical; Nanoreactor; Lithium-sulfur batteries
Funding
- Key Research and Development Program of Guangdong Province [2020B090919005]
- National Natural Science Foundation of China [22179025, 52002079, 21905056, 21975056, U1801257]
Ask authors/readers for more resources
In this study, a unique yolk-double shells hierarchical N-doped carbon nanospheres were designed as an electrochemical nanoreactor to effectively address the shuttle effect in lithium-sulfur batteries, improving cycling stability and capacity retention.
Rechargeable lithium-sulfur (Li-S) batteries are regarded as one of the most promising emerging energy technology due to their high theoretical capacity and energy density. However, the shuttle effect from the weak adsorption, poor diffusion-transfer, and insufficient catalytic site restrains further applications. Herein, the yolk-double shells hierarchical N-doped carbon nanospheres (NCS@C-800) were designed as an electrochemical nanoreactor, the material consists of high-content N-doped core-shell carbon nanospheres and a highly graphitized outer carbon shell, which has a gradient of N content. The unique structure host has many advantages, such as huge internal voids, ordered pore structure, and high electrical conductivity. In addition to the introduction of the N element, which offered a large number of adsorption and catalytic sites. Therefore, the NCS@C-800 effectively addresses the three above primary issues for constructing high performance Li-S. The results show that at 500 cycles at 1 C, the as-prepared material is 649 mAh g(-1), while at 1000 cycles at 2 C it is 400 mAh g(-1), with ultra-low capacity decays of 0.055% and 0.051% per cycle, respectively. More importantly, with an increase in S loading up to 5.43 mg cm(-2), it still maintained excellent cycling stability. This work offered an effective strategy for high-performance Li-S batteries.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available