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Polymer‐Templated Formation of Polydopamine‐Coated SnO 2 Nanocrystals: Anodes for Cyclable Lithium‐Ion Batteries
Author(s) -
Jiang Beibei,
He Yanjie,
Li Bo,
Zhao Shiqiang,
Wang Shun,
He YanBing,
Lin Zhiqun
Publication year - 2017
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.201611160
Subject(s) - materials science , faraday efficiency , lithium (medication) , electrode , anode , nanostructure , chemical engineering , coating , polymer , nanocrystal , electrolyte , nanoparticle , nanotechnology , layer (electronics) , chemistry , composite material , medicine , engineering , endocrinology
Well‐controlled nanostructures and a high fraction of Sn/Li 2 O interface are critical to enhance the coulombic efficiency and cyclic performance of SnO 2 ‐based electrodes for lithium‐ion batteries (LIBs). Polydopamine (PDA)‐coated SnO 2 nanocrystals, composed of hundreds of PDA‐coated “corn‐like” SnO 2 nanoparticles (diameter ca. 5 nm) decorated along a “cob”, addressed the irreversibility issue of SnO 2 ‐based electrodes. The PDA‐coated SnO 2 were crafted by capitalizing on rationally designed bottlebrush‐like hydroxypropyl cellulose‐graft‐poly (acrylic acid) (HPC‐ g ‐PAA) as a template and was coated with PDA to construct a passivating solid‐electrolyte interphase (SEI) layer. In combination, the corn‐like nanostructure and the protective PDA coating contributed to a PDA‐coated SnO 2 electrode with excellent rate capability, superior long‐term stability over 300 cycles, and high Sn→SnO 2 reversibility.