@article{32132,
  author = {Atetegeb Meazah Haregewoin and Lydia Terborg and Liang Zhang and Sunhyung Jurng and Brett L Lucht and Jinghua Guo and Philip N Ross and Robert Kostecki},
  title = {The electrochemical behavior of poly 1-pyrenemethyl methacrylate binder and its effect on the interfacial chemistry of a silicon electrode},
  abstract = {<p><span><span>The\&nbsp;physico-chemical properties\&nbsp;of poly (1-pyrenemethyl methacrylate) (PPy) are presented with respect to its use as a\&nbsp;</span>binder\&nbsp;in a Si composite\&nbsp;</span>anode\&nbsp;for Li-ion batteries. PPy\&nbsp;thin-films\&nbsp;on Si(100) wafer and Cu model\&nbsp;electrodes\&nbsp;are shown to exhibit superior adhesion as compared to conventional polyvinylidene difluoride (PVdF) binder. Electrochemical testing of the model bi-layer PPy/Si(100) electrodes in a standard\&nbsp;organic carbonate\&nbsp;electrolyte reveal higher electrolyte reduction current and an overall irreversible cathodic charge consumption during initial cycling versus the uncoated Si electrode. The PPy thin-film is also shown to impede\&nbsp;lithiation\&nbsp;of the underlying Si. XAS, AFM, TGA and\&nbsp;ATR-FTIR\&nbsp;analysis indicated that PPy binder is both chemically and electrochemically stable in the cycling potential range however significant swelling is observed due to a selective uptake of diethyl carbonate (DEC) from the electrolyte. The increased concentration of DEC and\&nbsp;depletion<span>\&nbsp;of\&nbsp;ethylene carbonate<span>\&nbsp;(EC) at the Si/PPy interface leads to continuous\&nbsp;decomposition\&nbsp;of the electrolyte and results in non-passivating behavior of the Si(100)/PPy electrode as compared to pristine silicon. Consequently, PPy binder improves the mechanical integrity of composite Si anodes but it influences mass transport at the Si(100)/PPy interface and alters electrochemical response of silicon during cycling in an adverse manner.</span></span></p>},
  year = {2018},
  booktitle = {Journal of Power Sources},
  journal = {Journal of Power Sources},
  series = {Journal of Power Sources},
  volume = {376},
  pages = {152 - 160},
  month = {02/2018},
  issn = {03787753},
  doi = {10.1016/j.jpowsour.2017.11.060},
  language = {eng},
}