期刊
ACS APPLIED MATERIALS & INTERFACES
卷 10, 期 36, 页码 30451-30459出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.8b11042
关键词
fast lithium transportation; low polysulfide permeability; PSS@HKUST-1 separator; high efficient lithium-sulfur batteries; high loading electrode
资金
- National Basic Research Program of China 973 Program [2015CB655302]
- National key research and development program [2016YFA0200204]
- National Natural Science Foundations of China [NSFC 21671171, 21875212, 51632008]
- Chinese government under the Thousand Youth Talents Program
- Zhejiang Province Science Fund for Distinguished Young Scholars [LR16B060001]
- Key Technology and Supporting Platform of Genetic Engineering of Materials under State's Key Project of Research and Development Plan [2016YFB0700600]
- Shanghai Aerospace Science and Technology Innovation Fund [SAST2015105]
Minimizing the shuttle effect of polysulfides (PS) is crucial for practical applications of lithium-sulfur (Li-S) batteries. However, the trade-off between effective suppression of the shuttle effect and fast redox reaction kinetics is inevitable for separator-based Li-S batteries. Herein, via a self-confined solid-conversion process, we develop a polystyrene sulfonate (PSS)-threaded well-intergrown HKUST-1 (Cu-3(BTC)(2)) (BTC: 1,3,5-benzene-tricarboxylic acid)-coated Celgard separator (PSS@HKUST-1/Celgard, PHC) for high-performance Li-S batteries. The PHC membrane favors the interception and accommodation of long-chain PS. Notably, enormous sulfonate groups of the three-dimensional PSS networks in PSS@HKUST-1 membrane significantly facilitate lithium-ion transport, which guarantee fast redox kinetics. The PHC separator demonstrates efficient inhibition of PS (i.e., 4 orders of magnitude lower in PS permeation rate) with fast Li+ transportation (i.e., 71% higher in ionic conductivity) than the Celgard separator. When applying the PHC membrane in Li-S batteries with conventional sulfur/super P carbon cathode, highly reversible capacity with an average fading rate of 0.05% per cycle is maintained for 500 cycles at 0.5 C, excellent rate performance up to 5 C, and high areal capacity over 7 mA h cm(-2) are also achieved. This work paves a new way for addressing the trade-off between suppressing the PS shuttle effect and fast kinetic reaction for separator-based Li-S batteries.
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