Journal
DALTON TRANSACTIONS
Volume 49, Issue 17, Pages 5677-5683Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/d0dt00429d
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Funding
- Shenzhen Basic Research Project Funds [JCYJ20190813172807127]
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The shuttle effect of long-chain polysulfides and the low conductivity of elemental sulfur lead to the inferior cycling stability of lithium-sulfur batteries and imped their practical applications. Herein, Co3O4 nanoflakes with uniform macro pores distribution were synthesized via facile oil bath and calcination methods. Coupled with super P and coated on common polypropylene separators, they were expected to hinder the migration of lithium polysulfides (LiPSs) and accelerate the redox kinetics of polysulfides. Coin cells assembled with the Co3O4-super P interlayer exhibited a capacity of 760 mA h g(-1) at 1 C, maintained 598 mA h g(-1) after 350 cycles, and the decay rate of discharge capacity was only about 0.062% per cycle. Such high performance can be attributed to the synergistic effects between polar Co3O4 and conductive super P. The facile fabrication method and high performance make the Co3O4-super P interlayer a feasible material to apply in lithium-sulfur batteries.
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