Liquid Metal Alloys as Self-Healing Negative Electrodes for Lithium Ion Batteries
- 1 January 2011
- journal article
- research article
- Published by The Electrochemical Society in Journal of the Electrochemical Society
- Vol. 158 (8), A845-A849
- https://doi.org/10.1149/1.3591094
Abstract
Improving the capacity and durability of electrode materials is one of the critical challenges lithium-ion battery technology is facing presently. Several promising anode materials, such as Si, Ge, and Sn, have theoretical capacities several times larger than that of the commercially used graphite negative electrode. However, their applications are limited because of the short cycle life due to fracture caused by diffusion-induced stresses (DISs) and the large volume change during electrochemical cycling. Here we present a strategy to achieve high capacity and improved durability of electrode materials using low-melting point metallic alloys. With gallium as an example, we show that at a temperature above the melting point of Ga, a reversible solid-liquid transition occurs upon lithiation (lithium insertion) and delithiation (lithium extraction) of Ga. As a result, cracks formed in the lithiated solid state can be “healed” once the electrode returns to liquid Ga after delithiation. This work suggests that cracking as a failure mode can be remedied by using liquid metal electrodes.Keywords
This publication has 20 references indexed in Scilit:
- A Critical Size of Silicon Nano‐Anodes for Lithium Rechargeable BatteriesAngewandte Chemie-International Edition, 2010
- Building better batteriesNature, 2008
- Liquid Gallium Electrode Confined in Porous Carbon Matrix as Anode for Lithium Secondary BatteriesElectrochemical and Solid-State Letters, 2008
- Role of Electrochemically Driven Cu Nanograins in CuGa2 ElectrodeChemistry of Materials, 2007
- High-performance lithium battery anodes using silicon nanowiresNature Nanotechnology, 2007
- Tin–Transition Metal–Carbon Systems for Lithium-Ion Battery Negative ElectrodesJournal of the Electrochemical Society, 2007
- Exploring the Li?Ga room temperature phase diagram and the electrochemical performances of the LixGay alloys vs. LiSolid State Ionics, 2005
- Porous Tin Oxides Prepared Using an Anodic Oxidation ProcessAdvanced Materials, 2004
- Electrochemical Analysis of Lithiated Graphite AnodesJournal of the Electrochemical Society, 2003
- Flake Cu-Sn Alloys as Negative Electrode Materials for Rechargeable Lithium BatteriesJournal of the Electrochemical Society, 2001