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Title: Molecular Spring Enabled High-Performance Anode for Lithium Ion Batteries

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/cm 2 and volumetric capacity of over 1700 Ah/L have been reached at a high current rate of 333 mA/g.
 [1] ;  [1] ;  [2] ;  [3] ;  [4] ;  [4] ;  [4] ;  [2] ;  [1]
  1. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Energy Storage and Distributed Resources Division
  2. Tsinghua Univ., Beijing (China). Key Lab. of Organic Optoelectronics and Molecular Engineering of Ministry of Education. Dept. of Chemistry
  3. BMW Group, Munich (Germany)
  4. BMW Group Technology Office USA, Mountain View, CA (United States)
Publication Date:
Grant/Contract Number:
Accepted Manuscript
Journal Name:
Additional Journal Information:
Journal Volume: 9; Journal Issue: 12; Journal ID: ISSN 2073-4360
Research Org:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); BMW Group Technology Office USA, Mountain View, CA (United States)
Sponsoring Org:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22); BMW Group (Germany)
Country of Publication:
United States
25 ENERGY STORAGE; 36 MATERIALS SCIENCE; energy storage; lithium-ion battery; conductive polymer binder; silicon/graphene; molecular spring; high loading
OSTI Identifier: