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28 February 2014

High-performance Germanium nanowire-based anodes developed by UL published in Nano Letters

The work by the University of Limerick within one of their tasks on materials and electrode development has led to the achievement of high capacity and scalable germanium nanowire arrays grown directly from the current collector.

These anodes retain capacities of ca. 900 mAh/g after 1100 cycles with excellent rate performance characteristics, even at very high discharge rates of 20–100C. They have shown by an ex situ high-resolution
transmission electron microscopy and high-resolution scanning electron microscopy study that this performance can be attributed to the complete restructuring of the nanowires that occurs within the first 100 cycles to form a continuous porous network that is mechanically robust. Once formed, this restructured anode retains a remarkably stable capacity with a drop of only 0.01% per cycle thereafter. As this approach encompasses a low energy processing method where all the material is electrochemically active and binder
free, the extended cycle life and rate performance characteristics demonstrated makes these anodes highly attractive for the most demanding lithium-ion applications such as long-range battery electric vehicles.

Full article can be found at http://pubs.acs.org/doi/abs/10.1021/nl403979s

  • Tadhg Kennedy , Emma Mullane , Hugh Geaney, Michal Osiak , Colm O’Dwyer, and Kevin M. Ryan, “High-Performance Germanium Nanowire-Based Lithium-Ion Battery Anodes Extending over 1000 Cycles Through in Situ Formation of a Continuous Porous Network” Nano Lett., 2014, 14 (2), pp 716–723

 

Based on this publication, the University of Limerick issued a Press Release on February 7 titled “Researchers make breakthrough in battery technology” that has received attention and diffusion in various media and websites:

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