Roll-to-roll prelithiation of Sn foil anode suppresses gassing and enables stable full-cell cycling of lithium ion batteries

Hui Xu,Can Zhang,Yuheng Zheng,Wenjian Liu,Xinlong Chen,Ju Li,Yong Xie,Yunhui Huang,Sa Li

doi:10.1039/c9ee01404g

Abstract

LixSn foil anode prepared by mechanical prelithiation suppresses gassing and achieves stable full-cell cycling in lithium ion batteries.

Highlights

Self-supporting tin foil is a high-volumetric-capacity alternative to the graphite lithium-ion batteries (LIBs) anode; it shows an exceptionally low initial coulombic efficiency (10–20%), even lower than that of Si and SnO2 nanoparticles with 4103Â contact area with the electrolyte, which is quite strange
Inspired by previous reports that tin catalyzes the decomposition of organic solvents, we proved that bare Sn catalyzes electrolyte decomposition at an intermediate voltage to generate gas bubbles and Leidenfrost films, which cut off the transport of lithium ions and prevent the formation of an adherent solid–electrolyte interphase (SEI)
When the absolute potential is below 1 V, it simultaneously promotes the formation of a solid SEI and mechanical adherence, which can in turn suppress future gassing

Summary

Introduction

Self-supporting tin foil is a high-volumetric-capacity alternative to the graphite LIB anode; it shows an exceptionally low initial coulombic efficiency (10–20%), even lower than that of Si and SnO2 nanoparticles with 4103Â contact area with the electrolyte, which is quite strange. ISSN 1754-5706 PAPER Sa Li, Yunhui Huang, Ju Li et al Roll-to-roll prelithiation of Sn foil anode suppresses gassing and enables stable full-cell cycling of lithium ion batteries Roll-to-roll prelithiation of Sn foil anode suppresses gassing and enables stable full-cell cycling of lithium ion batteries†

Results

Conclusion