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One-pot synthesis of high-capacity silicon anodes via on-copper growth of a semi-conducting, porous polymer
  • Michael Bojdys
Michael Bojdys
Humboldt-Universit├Ąt zu Berlin

Corresponding Author:m.j.bojdys.02@cantab.net

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Abstract

Silicon-based anodes with lithium ions as charge carriers have the highest predicted theoretical specific capacity of 3579 mA h g-1 (for Li15Si4). Contemporary electrodes do not achieve this theoretical value largely because conventional production paradigms rely on the mixing of weakly coordinated components. In this paper, a semi-conductive triazine-based graphdiyne polymer network is grown around silicon nanoparticles directly on the current collector, a copper sheet. The porous, semi-conducting organic framework (i) adheres to the current collector on which it grows via cooperative van der Waals interactions, (ii) acts effectively as conductor for electrical charges and binder of silicon nanoparticles via conjugated, covalent bonds, and (iii) enables selective transport of electrolyte and Li-ions through pores of defined size. The resulting anode shows extraordinarily high capacity at the theoretical limit of fully lithiated silicon. Finally, we combine our anodes in proof-of-concept battery assemblies using a conventional layered Ni-rich oxide cathode.
26 Dec 2021Submitted to Natural Sciences
03 Jan 2022Submission Checks Completed
03 Jan 2022Assigned to Editor
07 Jan 2022Reviewer(s) Assigned
22 Jan 2022Review(s) Completed, Editorial Evaluation Pending
24 Jan 2022Editorial Decision: Revise Major
21 Mar 20221st Revision Received
23 Mar 2022Assigned to Editor
23 Mar 2022Submission Checks Completed
23 Mar 2022Reviewer(s) Assigned
04 Apr 2022Review(s) Completed, Editorial Evaluation Pending
11 Apr 2022Editorial Decision: Revise Minor
19 Apr 20222nd Revision Received
21 Apr 2022Assigned to Editor
21 Apr 2022Submission Checks Completed
21 Apr 2022Review(s) Completed, Editorial Evaluation Pending
22 Apr 2022Editorial Decision: Accept