Sulfiphilic Nickel Phosphosulfide Enabled Li2S Impregnation in 3D Graphene Cages for Li–S Batteries

Guangmin Zhou, Jie Sun, Yang Jin, Wei Chen, Chenxi Zu, Rufan Zhang, Yongcai Qiu, Jie Zhao, Denys Zhuo, Yayuan Liu, Xinyong Tao, Wei Liu, Kai Yan, Hye Ryoung Lee, Yi Cui*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

111 Scopus citations

Abstract

Researchers combine the advantages of nonpolar carbon materials and polar metal phosphosulfides to stabilize the Li2S cathode by designing a 3D graphene cage with a thin layer of electrodeposited nickel phosphosulfides (denoted as Ni–P–S) for Li2S impregnation, which has several advantages. Ni–P–S is highly conductive and can improve the electrical connectivity within the electrode as a novel and effective encapsulation material. The polar/hydrophilic nature of Ni–P–S favors the impregnation of Li2S and allows the formation of strong chemical bond with lithium polysulfides and the electrodeposition method produces an ultrathin coating of Ni–P–S, which has little influence on its specific capacity, and also minimizes the diffusion distance of both lithium ions and electrons, resulting in enhanced rate performance.

Original languageEnglish (US)
Article number1603366
JournalAdvanced Materials
Volume29
Issue number12
DOIs
StatePublished - Mar 28 2017

Keywords

  • graphene cage
  • lithium sulfides
  • lithium–sulfur batteries
  • nickel phosphosulfide
  • sulfiphilic

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

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