My watch list  

High‐Temperature Formation of a Functional Film at the Cathode/Electrolyte Interface in Lithium–Sulfur Batteries: An In Situ AFM Study


Lithium–sulfur (Li–S) batteries have been attracting wide attention for their promising high specific capacity. A deep understanding of Li–S interfacial mechanism including the temperature (T) effect is required to meet the demands for battery modification and systematic study. Herein, the interfacial behavior during discharge/charge is investigated at high temperature (HT) of 60 °C in an electrolyte based on lithium bis(fluorosulfonyl) imide (LiFSI). By in situ atomic force microscopy (AFM), dynamic evolution of insoluble Li2S2 and Li2S is studied at the nanoscale. An in situ formed functional film can be directly monitored at 60 °C after Li2S nucleation. It retards side reactions and facilitates interfacial redox. The insight into the interfacial processes at HT provides direct evidence of the existence of the film and reveals its dynamic behavior, providing a new avenue for electrolyte design and performance enhancement.

Filmanalyse: Durch elektrochemische AFM‐Studien bei 60 °C lässt sich in Li‐S‐Batterien die In‐situ‐Bildung eines funktionellen Films an der Grenzfläche zwischen der HOPG‐Kathode und dem Polysulfid‐Elektrolyt direkt verfolgen (HOPG=hoch orientierter pyrolytischer Graphit). Der Film bildet sich ausgehend von einem LiF‐Netz, das Polysulfid(PS)‐Intermediate durch physikalische Einschränkung sowie durch chemische Verankerung abfängt.

Authors:   Shuang-Yan Lang, Yang Shi, Yu-Guo Guo, Rui Wen, Li-Jun Wan; Shuang‐Yan Lang, Yang Shi, Yu‐Guo Guo, Rui Wen, Li‐Jun Wan
Journal:   Angewandte Chemie
Volume:   129
edition:   46
Year:   2017
Pages:   14625
DOI:   10.1002/ange.201706979
Publication date:   16-Oct-2017
More about Angewandte Chemie
  • News

    Nonflammable electrolyte for high-performance potassium batteries

    Australian scientists have developed a nonflammable electrolyte for potassium and potassium-ion batteries, for applications in next-generation energy-storage systems beyond lithium technology. In the journal Angewandte Chemie, scientists write that the novel electrolyte based on an organic ... more

    Imprinted Color Patterns

    Structural colors appear because the imprinted pattern on a surface changes the wavelengths of light. Chinese scientists have introduced an azopolymer that allows the imprinting of nanopatterns in a novel room-temperature lithographic process. A key aspect of the technique is the light-indu ... more

    Pathways toward Post-Petrochemistry

    Ethylene, or ethene, is a primary feedstock for the chemical industry, including as a starting material for the production of a wide variety of plastics. In the journal Angewandte Chemie, scientists have now introduced a new electrochemical technique for selective and energy-efficient produ ... more

More about Wiley
Your browser is not current. Microsoft Internet Explorer 6.0 does not support some functions on Chemie.DE