Sulfiphilic Nickel Phosphosulfide Enabled Li2 S 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

doi:10.1002/adma.201603366

Sulfiphilic Nickel Phosphosulfide Enabled Li₂ S Impregnation in 3D Graphene Cages for Li-S Batteries

Adv Mater. 2017 Mar;29(12). doi: 10.1002/adma.201603366. Epub 2017 Jan 30.

Authors

Guangmin Zhou¹, Jie Sun¹, Yang Jin¹, Wei Chen¹, Chenxi Zu¹, Rufan Zhang¹, Yongcai Qiu¹, Jie Zhao¹, Denys Zhuo¹, Yayuan Liu¹, Xinyong Tao¹, Wei Liu¹, Kai Yan¹, Hye Ryoung Lee¹, Yi Cui^{1

2}

Affiliations

¹ Department of Materials Science and Engineering, Stanford University, Stanford, CA, 94305, USA.
² Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory, 2575, Sand Hill Road, Menlo Park, CA, 94025, USA.

PMID: 28134456
DOI: 10.1002/adma.201603366

Abstract

A 3D graphene cage with a thin layer of electrodeposited nickel phosphosulfide for Li2S impregnation, using ternary nickel phosphosulphide as a highly conductive coating layer for stabilized polysulfide chemistry, is accomplished by the combination of theoretical and experimental studies. The 3D interconnected graphene cage structure leads to high capacity, good rate capability and excellent cycling stability in a Li2S cathode.

Keywords: graphene cage; lithium sulfides; lithium-sulfur batteries; nickel phosphosulfide; sulfiphilic.