Enhanced Lithium-ion intercalation properties of coherent hydrous vanadium pentoxide-carbon cryogels nanocomposites

Journal Article · Tue Jun 01 04:00:00 EDT 2010 · Journal of Power Sources, 195(12):3893-3899

DOI:https://doi.org/10.1016/j.jpowsour.2009.12.120· OSTI ID:991995

Pan, Anqiang; Liu, Dawei; Zhou, Xiaoyuan; Garcia, Betzaita Betalla; Liang, Shu-quan; Liu, Jun; Cao, Guozhong

Coherent hydrous vanadium pentoxide (V2O5•nH2O) - carbon cryogels (CCs) nanocomposites were synthesized by electrodeposition of vanadium pentoxide onto the porous carbon scaffold which was derived from resorcinol (R) and formaldehyde (F) organic hydrogels. As-fabricated nanocomposites were characterized by scanning electron microscopy (SEM), along with EDAX and nitrogen sorption isotherms which suggested vanadium pentoxide incorporated in the pores of carbon cryogels. The nanocomposites showed much improved discharge capacity and better cyclic stability as compared to hydrous vanadium pentoxide films deposited on platinum foil. The discharge capacity of the nanocomposites reached 280 mAh/g based on the mass of the vandium pentoxide at a current density of 100mA/g and it possessed good cycle stability at different discharge rate. The results demonstrated that electrochemical performances, such as specific discharge capacitance and reversibility of the composite electrode, could be greatly enhanced by the introduction of carbon cryogels (CCs) scaffold with three-dimensionally interconnected porous structure in which V2O5•nH2O homogeneously dispersed.

• Research Organization: Pacific Northwest National Laboratory (PNNL), Richland, WA (US)
• Sponsoring Organization: USDOE
• DOE Contract Number: AC05-76RL01830
• OSTI ID: 991995
• Report Number(s): PNNL-SA-71900; KC0302010
• Journal Information: Journal of Power Sources, 195(12):3893-3899, Journal Name: Journal of Power Sources, 195(12):3893-3899 Journal Issue: 12 Vol. 195; ISSN JPSODZ; ISSN 0378-7753
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
77 NANOSCIENCE AND NANOTECHNOLOGY
CAPACITANCE
CARBON
COMPOSITE MATERIALS
CURRENT DENSITY
ELECTROCHEMISTRY
ELECTRODEPOSITION
GELS
HYDRATES
NANOSTRUCTURES
VANADIUM OXIDES
coherent nanocomposite
discharge capacity
hydrous vanadium pentoxide
carbon cryogels
potentiodynamic deposition