• 文献标题:   Synthesis and electrochemical performance of LiV3O8/graphene for aqueous lithium batteries
  • 文献类型:   Article
  • 作  者:   ZORKIPLI NNM, YAHAYA MZ, SALLEH NA, PURWANTO A, KHEAWHOM S, KAUS NHM, MOHAMAD AA
  • 作者关键词:   lithium vanadate oxide, solgel, calcination, anode, aqueous lithium batterie
  • 出版物名称:   IONICS
  • ISSN:   0947-7047 EI 1862-0760
  • 通讯作者地址:   Univ Sains Malaysia
  • 被引频次:   0
  • DOI:   10.1007/s11581-019-03303-y
  • 出版年:   2020

▎ 摘  要

The effect of different calcination temperatures had been successfully analyzed on the LiV3O8 nanorods that were synthesized through the sol-gel method under the thermal, structural, and morphological characterizations. The thermal analysis had revealed the calcination at 400 degrees C to be enough for removing all the residual solvents from the sol-gel, while phase and Rietveld analyses had shown pure LiV3O8 to be successfully attained at a calcination temperature of 500 degrees C. The morphological observation had also indicated high calcination temperatures as inducing large-sized LiV3O8 nanorods. LiV3O8 was then mixed with graphene and evaluated by electrochemical analysis. The best electrochemical performance was with graphene content at 15 wt.%. At low cyclic voltammetry (CV) scan rates of 0.1 mV s(-1), two pairs of redox peaks at E-SCE = - 0.42/- 0.40 V and - 0.22/- 0.27 V were observed and consistent with Li+ diffusion coefficients at 1.910 x 10(-14) cm(2) s(-1) (anodic) and 1.123 x 10(-14) cm(2) s(-1) (cathodic). For specific capacity, it demonstrated a higher initial specific capacity (90.0 mAhg(-1)) on LiV3O8/graphene. The post-structural and morphological analyses on the anode after different CV cycles clearly provide in-depth information on the influence of the graphene addition.