Enhanced Cycling Performance for Lithium–Sulfur Batteries by a Laminated 2D g‐C3N4/Graphene Cathode Interlayer

Enhanced Cycling Performance for Lithium–Sulfur Batteries by a Laminated 2D g‐C3N4/Graphene Cathode Interlayer

Decay in electrochemical performance resulting from the “shuttle effect” of dissolved lithium polysulfides is one of the biggest obstacles for the realization of practical applications of lithium–sulfur (Li–S) batteries. To meet this challenge, a 2D g‐C3N4/graphene sheet composite (g‐C3N4/GS) was fa...

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Veröffentlicht in:ChemSusChem 2019-01, Vol.12 (1), p.213-223
Hauptverfasser: Qu, Long, Liu, Pei, Yi, Yikun, Wang, Tao, Yang, Pu, Tian, Xiaolu, Li, Mingtao, Yang, Bolun, Dai, Sheng
Format: Artikel
Sprache:eng
Schlagworte:
Anchoring
batteries
Carbon nitride
Cathodes
Cathodic dissolution
Charge transfer
Cycles
Diffusion coefficient
Discharge
Dissolution
Electrochemical analysis
Graphene
Interlayers
Lithium
Lithium sulfur batteries
Organic chemistry
Polysulfides
Separators
sulfides
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Zusammenfassung:Decay in electrochemical performance resulting from the “shuttle effect” of dissolved lithium polysulfides is one of the biggest obstacles for the realization of practical applications of lithium–sulfur (Li–S) batteries. To meet this challenge, a 2D g‐C3N4/graphene sheet composite (g‐C3N4/GS) was fabricated as an interlayer for a sulfur/carbon (S/KB) cathode. It forms a laminated structure of channels to trap polysulfides by physical and chemical interactions. The thin g‐C3N4/GS interlayer significantly suppresses diffusion of the dissolved polysulfide species (Li2Sx; 2
ISSN:1864-5631
1864-564X
DOI:10.1002/cssc.201802449