Please use this identifier to cite or link to this item:
Title: Interfacial engineering enables Bi@C-TiOx microspheres as superpower and long life anode for lithium-ion batteries
Authors: Huang, ZD
Lu, H
Qian, K
Fang, YW
Du, QC
He, YB
Masese, T
Yang, XS 
Ma, YW
Huang, W
Keywords: Anode materials
Interfacial engineering
Li-ion batteries
Issue Date: 2018
Publisher: Elsevier
Source: Nano energy, 2018, v. 51, p. 137-145 How to cite?
Journal: Nano energy 
Abstract: Bismuth (Bi), a uniquely stable pnictogen element, is deemed a promising anode material for lithium-ion batteries owing to its high volumetric capacity, moderate operating voltage and environmental friendliness. However, the application of Bi as anode is hindered by its low conductivity and large volume change during cycling. Herein, we introduce an advanced surface engineering strategy to construct Bi@C-TiOx microspheres encapsulated by ultra-large graphene interfacial layer. Ultrafine Bi nanoparticles are confined and uniformly dispersed inside the C-TiOx matrix, which is the pyrolysis derivative of the newly developed Bi-Ti-EG bimetal organic frameworks, with the aid of a selective graphene interfacial barrier. A three-dimensional (3D) long-range conductive network is successfully constructed by the ultra-large graphene and the carbonized derivative of Bi-Ti-EG. Additionally, the 3D carbon network and the in-situ formed TiOx coupled with a porous structure act as soft buffer and hard suppressor to alleviate the huge volume change of Bi during cycling, and they also are the important electrochemically active components. Thanks to the synergistic effects intrigued by the aforementioned interfacial engineering strategy, the newly developed ultra-large graphene encapsulated Bi@C-TiOx microspheres exhibit an exceptional superpower and outstanding cycle stability (namely, 333.3, 275 and 225 mAh g−1 at 1, 5 and 10 A g−1, respectively, with remarkable capacity retention upon 5000 cycles), surpassing other reported Bi-based anode materials so far. This study underpins that the nanoscale surface design of electrode materials for batteries is an effective approach to significantly enhance the power capability, capacity and cyclic stability of new metal anodes.
ISSN: 2211-2855
EISSN: 2211-3282
DOI: 10.1016/j.nanoen.2018.06.051
Appears in Collections:Journal/Magazine Article

View full-text via PolyU eLinks SFX Query
Show full item record


Citations as of Apr 6, 2019


Last Week
Last month
Citations as of Apr 9, 2019

Page view(s)

Last Week
Last month
Citations as of Apr 16, 2019

Google ScholarTM



Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.