A Design of Solid-State Li-S Cell with Evaporated Lithium Anode To Eliminate Shuttle Effects

Yujie Hao; Sheng Wang; Feng Xu; Yijie Liu; Ningning Feng; Ping He; Haoshen Zhou

doi:10.1021/acsami.7b07057

A Design of Solid-State Li-S Cell with Evaporated Lithium Anode To Eliminate Shuttle Effects

ACS Appl Mater Interfaces. 2017 Oct 4;9(39):33735-33739. doi: 10.1021/acsami.7b07057. Epub 2017 Sep 25.

Authors

Yujie Hao¹, Sheng Wang¹, Feng Xu¹, Yijie Liu¹, Ningning Feng¹, Ping He¹, Haoshen Zhou^{1

2}

Affiliations

¹ Center of Energy Storage Materials & Technology, College of Engineering and Applied Sciences, National Laboratory of Solid State Microstructures, and Collaborative Innovation Center of Advanced Microstructures, Nanjing University , Nanjing 210093, P. R. China.
² Energy Technology Research Institute, National Institute of Advanced Industrial Science and Technology (AIST) , Umezono 1-1-1, Tsukuba 3058568, Japan.

PMID: 28945345
DOI: 10.1021/acsami.7b07057

Abstract

Li-S batteries hold great potential for energy storage systems due to their high theoretical capacity and low cost. However, the shuttle of polysulfides in conventional Li-S batteries with organic electrolyte results in severe problems, such as low Coulombic efficiency and poor cycling stability. Here, we developed a solid-state Li-S battery using Li_1.5Al_0.5Ge_1.5(PO₄)₃ (LAGP) solid ceramic electrolyte instead of liquid electrolyte. Lithium film was deposited on one side of LAGP by an evaporation method to improve the contact between anode and LAGP. Sulfur-coated carbon nanotubes cathode (S-MWCNT) composition was casted on the other side of LAGP as the cathode and a small amount of ionic liquid was dropped in order to improve the ionic conductivity. This battery exhibited a high capacity of 1510 mAh g^-1 in the first cycle and retained 1400 mAh g^-1 after 30 cycles. Meanwhile, the Coulombic efficiency of the battery was almost 100% for each cycle, which indicated the shuttle effect was circumvented completely.

Keywords: Li1.5Al0.5Ge1.5(PO4)3; carbon nanotubes; evaporated lithium anode; shuttle effects; solid-state Li-S cell.