Premium
Encapsulating Tin Dioxide@Porous Carbon in Carbon Tubes: A Fiber‐in‐Tube Hierarchical Nanostructure for Superior Capacity and Long‐Life Lithium Storage
Author(s) -
Liu Yuan,
Lan JinLe,
Cai Qing,
Yu YunHua,
Lin YuanHua,
Yang XiaoPing
Publication year - 2015
Publication title -
particle and particle systems characterization
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.877
H-Index - 56
eISSN - 1521-4117
pISSN - 0934-0866
DOI - 10.1002/ppsc.201500073
Subject(s) - materials science , anode , carbon fibers , chemical engineering , nanotechnology , lithium (medication) , carbon nanofiber , nanostructure , nanoparticle , porosity , tin dioxide , electrode , composite material , carbon nanotube , chemistry , composite number , metallurgy , medicine , engineering , endocrinology
A novel fiber‐in‐tube hierarchical nanostructure of SnO 2 @porous carbon in carbon tubes (SnO 2 @PC/CTs) is creatively designed and synthesized though a carbon coating on scalable electrospun hybrid nanofibers template and a post‐etching technique. This 1D nanoarchitecture consists of double carbon‐buffering matrixes, i.e., the external carbon tubular shell and the internal porous carbon skeleton, which can work synergistically to address the various issues of SnO 2 nanoanode operation, such as pulverization, particle aggregation, and vulnerable electrical contacts between the SnO 2 nanoparticles and the carbon conductors. Thus, the as‐obtained SnO 2 @PC/CTs nanohybrids used as a lithium‐ion‐battery anode exhibits a higher reversible capacity of 1045 mA h g −1 at 0.5 A g −1 after 300 cycles as well as a high‐rate cycling stability after 1000 cycles. The enhanced performance can be attributed to the wonderful merits of the external carbon protective shell for preserving the integrity of the overall electrode, and the internal porous carbon skeleton for inhibiting the aggregation and electrical isolation of the active particles during cycling.