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Polymers 2017, 9(12), 657; https://doi.org/10.3390/polym9120657

Molecular Spring Enabled High-Performance Anode for Lithium Ion Batteries

1
Energy Storage and Distributed Resources Division, Lawrence Berkeley National Laboratory, 1 Cyclotron Rd., Berkeley, CA 94720, USA
2
Key Lab of Organic Optoelectronics and Molecular Engineering of Ministry of Education, Department of Chemistry, Tsinghua University, Beijing 100084, China
3
BMW Group, Petuelring 130, 80788 Munich, Germany
4
BMW Group Technology Office USA, 2606 Bayshore Parkway, Mountain View, CA 94043, USA
These authors contributed equally to this work.
*
Author to whom correspondence should be addressed.
Received: 4 October 2017 / Revised: 25 November 2017 / Accepted: 27 November 2017 / Published: 29 November 2017
(This article belongs to the Special Issue Conductive Polymers 2017)
View Full-Text   |   Download PDF [1496 KB, uploaded 29 November 2017]   |  

Abstract

Flexible butyl interconnection segments are synthetically incorporated into an electronically conductive poly(pyrene methacrylate) homopolymer and its copolymer. The insertion of butyl segment makes the pyrene polymer more flexible, and can better accommodate deformation. This new class of flexible and conductive polymers can be used as a polymer binder and adhesive to facilitate the electrochemical performance of a silicon/graphene composite anode material for lithium ion battery application. They act like a “spring” to maintain the electrode mechanical and electrical integrity. High mass loading and high areal capacity, which are critical design requirements of high energy batteries, have been achieved in the electrodes composed of the novel binders and silicon/graphene composite material. A remarkable area capacity of over 5 mAh/cm2 and volumetric capacity of over 1700 Ah/L have been reached at a high current rate of 333 mA/g. View Full-Text
Keywords: energy storage; lithium-ion battery; conductive polymer binder; silicon/graphene; molecular spring; high loading energy storage; lithium-ion battery; conductive polymer binder; silicon/graphene; molecular spring; high loading
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Zheng, T.; Jia, Z.; Lin, N.; Langer, T.; Lux, S.; Lund, I.; Gentschev, A.-C.; Qiao, J.; Liu, G. Molecular Spring Enabled High-Performance Anode for Lithium Ion Batteries. Polymers 2017, 9, 657.

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