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Embroidered Copper Microwire Current Collector for Improved Cycling Performance of Silicon Anodes in Lithium-Ion Batteries.

Abstract：

:Si holds great promise as an alloying anode material for Li-ion batteries with improved energy density because of its high theoretical specific capacity and favorable operation voltage range. However, the large volume expansion of Si during electrochemical reaction with Li and the associated adverse effects strongly limit its prospect for application. Here, we report on the use of three-dimensional instead of flat current collectors for high-capacity Si anodes in an attempt to mitigate the loss of electrical contact of active electrode regions as a result of structural disintegration with cycling. The current collectors were produced by technical embroidery and consist of interconnected Cu wires of diameter <150 µm. In comparison to Si/Li cells using a conventional Cu foil current collector, the embroidered microwire network-based cells show much enhanced capacity and reversibility due to a higher degree of tolerance to cycling.

journal_name

Sci Rep

journal_title

Scientific reports

authors

Breitung B,Aguiló-Aguayo N,Bechtold T,Hahn H,Janek J,Brezesinski T

doi

10.1038/s41598-017-13261-y

subject

Has Abstract

pub_date

2017-10-12 00:00:00

pages

13010

issue

1

issn

2045-2322

pii

10.1038/s41598-017-13261-y

journal_volume

7

pub_type

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