Premium
Si–CNT/rGO Nanoheterostructures as High‐Performance Lithium‐Ion‐Battery Anodes
Author(s) -
Xiao Lisong,
Sehlleier Yee Hwa,
Dobrowolny Sascha,
Orthner Hans,
Mahlendorf Falko,
Heinzel Angelika,
Schulz Christof,
Wiggers Hartmut
Publication year - 2015
Publication title -
chemelectrochem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.182
H-Index - 59
ISSN - 2196-0216
DOI - 10.1002/celc.201500323
Subject(s) - materials science , graphene , anode , carbon nanotube , lithium (medication) , oxide , composite number , nanoparticle , nanotechnology , electrical conductor , battery (electricity) , chemical engineering , composite material , electrode , power (physics) , chemistry , metallurgy , medicine , physics , quantum mechanics , endocrinology , engineering
A robust and electrochemically stable 3D nanoheterostructure consisting of Si nanoparticles (NPs), carbon nanotubes (CNTs) and reduced graphene oxide (rGO) is developed as an anode material (Si–CNT/rGO) for lithium‐ion batteries (LIBs). It integrates the benefits from its three building blocks of Si NPs, CNTs, and rGO; Si NPs offer high capacity, CNTs act as a mechanical, electrically conductive support to connect Si NPs, and highly electrically conductive and flexible rGO provides a robust matrix with enough void space to accommodate the volume changes of Si NPs upon lithiation/delithiation and to simultaneously assure good electric contact. The composite material shows a high reversible capacity of 1665 mAh g −1 with good capacity retention of 88.6 % over 500 cycles when cycled at 0.5 C, that is, a 0.02 % capacity decay per cycle. The high‐power capability is demonstrated at 10 C (16.2 A g −1 ) where 755 mAh g −1 are delivered, thus indicating promising characteristics of this material for high‐performance LIBs.