Type

Journal Article

Authors

Jonathan N Coleman
Valeria Nicolosi
Georg Duesberg
Umar Khan
Aleksey Shmeliov
Dermot Daly
Nina C Berner
Niall McEvoy
Chuanfang John Zhang
Paul J King
and 2 others

Subjects

Chemistry

Topics
cm 1 h 2 silicon based additive negative electrode anode battery binder silicon pedot pss lithium ion battery conducting polymer polymer large scale h 3 carbon black

A Commercial Conducting Polymer as Both Binder and Conductive Additive for Silicon Nanoparticle-Based Lithium-Ion Battery Negative Electrodes. (2016)

Abstract This work describes silicon nanoparticle-based lithium-ion battery negative electrodes where multiple nonactive electrode additives (usually carbon black and an inert polymer binder) are replaced with a single conductive binder, in this case, the conducting polymer PSS. While enabling the production of well-mixed slurry-cast electrodes with high silicon content (up to 95 wt %), this combination eliminates the well-known occurrence of capacity losses due to physical separation of the silicon and traditional inorganic conductive additives during repeated lithiation/delithiation processes. Using an in situ secondary doping treatment of the PSS with small quantities of formic acid, electrodes containing 80 wt % SiNPs can be prepared with electrical conductivity as high as 4.2 S/cm. Even at the relatively high areal loading of 1 mg/cm(2), this system demonstrated a first cycle lithiation capacity of 3685 mA·h/g (based on the SiNP mass) and a first cycle efficiency of ∼78%. After 100 repeated cycles at 1 A/g this electrode was still able to store an impressive 1950 mA·h/g normalized to Si mass (∼75% capacity retention), corresponding to 1542 mA·h/g when the capacity is normalized by the total electrode mass. At the maximum electrode thickness studied (∼1.5 mg/cm(2)), a high areal capacity of 3 mA·h/cm(2) was achieved. Importantly, these electrodes are based on commercially available components and are produced by the standard slurry coating methods required for large-scale electrode production. Hence, the results presented here are highly relevant for the realization of commercial LiB negative electrodes that surpass the performance of current graphite-based negative electrode systems.
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Full list of authors on original publication

Jonathan N Coleman, Valeria Nicolosi, Georg Duesberg, Umar Khan, Aleksey Shmeliov, Dermot Daly, Nina C Berner, Niall McEvoy, Chuanfang John Zhang, Paul J King and 2 others

Experts in our system

1
Jonathan Coleman
Trinity College Dublin
Total Publications: 217
 
2
Valeria Nicolosi
Trinity College Dublin
Total Publications: 67
 
3
Georg Duesberg
Trinity College Dublin
Total Publications: 116
 
4
Umar Khan
Trinity College Dublin
Total Publications: 37
 
5
Aleksey Shmeliov
Trinity College Dublin
Total Publications: 7
 
6
Dermot Daly
Trinity College Dublin
Total Publications: 3
 
7
Nina C Berner
Trinity College Dublin
Total Publications: 20
 
8
Niall Mcevoy
Trinity College Dublin
Total Publications: 54
 
9
Chuanfang John Zhang
Trinity College Dublin
Total Publications: 5
 
10
Paul J King
Trinity College Dublin
Total Publications: 15