Bio-assisted synthesis of mesoporous Li3V2(PO4)3 for high performance lithium-ion batteries

W. He, X.D. Zhang, X.Y. Du, Y. Zhang, Yuanzheng Yue, S.J. Shen, M. Li

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

29 Citationer (Scopus)

Abstrakt

The mesoporous biocarbon coated Li3V2(PO4)3(MBC-LVP) cathode material is synthesized by abiotemplate-assisted sol–gel reaction process using low-cost beer waste brewing yeasts (BWBYs) as bothstructural template and biocarbon source. The structure and electrochemical performances of MBC-LVPwere investigated using Raman spectra, thermogravimetric measurements (TGA), adsorption–desorptionisotherms and pore-size-distribution curves, X-ray diffraction (XRD), transmission electron microscope(TEM and HRTEM), and electrochemical methods. The results show that the MBC-LVP synthesized at750C has a hierarchical nanostructure, which consist of Li3V2(PO4)3crystal nanoparticles and amor-phous biocarbons network (11.5%) with hierarchical mesoporous structures (slit shape mesopores, openwormlike mesopores and plugged mesopores). This hierarchical nanostructure facilitates electron andlithium ion diffusion. The MBC-LVP electrode has high discharge capacity (about 205 mAh g−1) at a cur-rent density of 0.2 C in the voltage region of 3.0–4.8 V and the diffusion coefficient of Li+-ions determinedby CV and EIS is higher than those of olivine LiFePO4. We have revealed the formation mechanism of MBC-LVP, the possible lithium pathways in the MBC-LVP and established a relation between the structure andthe ionic and electronic transport properties.

OriginalsprogEngelsk
TidsskriftElectrochimica Acta
Vol/bind112
Sider (fra-til)295–303
Antal sider9
ISSN0013-4686
DOI
StatusUdgivet - 2013

Fingeraftryk Dyk ned i forskningsemnerne om 'Bio-assisted synthesis of mesoporous Li3V2(PO4)3 for high performance lithium-ion batteries'. Sammen danner de et unikt fingeraftryk.

  • Citationsformater