Open AccessHydrothermally hollow SnO 2 microspheres as sodium ion battery anode with high capacity and superior stability
Author(s) -
He Hong,
Xu Maowen,
Yang Jingang,
He Bo,
Xie Jiale
Publication year - 2017
Publication title -
micro and nano letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.25
H-Index - 31
ISSN - 1750-0443
DOI - 10.1049/mnl.2017.0304
Subject(s) - anode , materials science , mesoporous material , nanoparticle , chemical engineering , electrolyte , calcination , electrode , nanomaterials , lithium (medication) , nanotechnology , chemistry , catalysis , engineering , medicine , biochemistry , endocrinology
Hollow SnO 2 microspheres were synthesised through a hydrothermal process with post‐calcination in air. Compared with commercial SnO 2 nanoparticles, this organised and hollow SnO 2 microspheres show a 3.3–3.6 times higher charge/discharge capacity, a superior cycling stability and a higher Coulomb efficiency when used as an anode material for sodium ion batteries (SIBs). The superior performance of hollow SnO 2 microspheres was mainly attributed to the hollow structure with number of smaller nanoparticles. Compared with the disordered commercial SnO 2 nanoparticles, the organised and hollow SnO 2 microspheres with mesopores and micropores not only can facilitate charge transfer between the electrode and electrolyte, improve electronic and ionic transports, but also can accommodate the volume change to enhance the cycling stability of SnO 2 ‐based SIB anodes. This work also demonstrates that the unique hollow structures can be broadly used to construct electrode nanomaterials.