"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, and Yi Cui; Advanced Materials, 01/30/17.

Additional Authors: 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, and Yi Cui

Abstract:

image

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.