Synthesis and Characterization of High Capacity LiFeBO3

Tuesday, October 13, 2015: 10:20
106-B (Phoenix Convention Center)
M. A. Cambaz (Helmholtz Institute Ulm for Electrochemical Storage), A. R. Munnangi (Helmholtz Institute Ulm (HIU)), A. H. Pohl, R. Witte (Karlsruhe Institute of Technology (KIT)), and M. Fichtner (Karlsruhe Institute of Technology (KIT), Germany)
Polyanionic framework compounds have attracted increasing interest since the first report of LiFePO4 as cathode material.[1] In between these polyanionic compounds the group of the borates are offering attractive features in term of high theoretical capacity. The BO33- is having the lowest-weight framework and therefore having the highest theoretical capacity for one electron transfer. It’s having a favourable element combination in terms of toxicity, cost and sustainability. In this work we show how highly pure and high capacity LiFeBO3 can be prepared in a straightforward and effective manner. [2]

The LiFeBO3 samples were synthesized by a simple solid state reaction assisted by high energy ball milling .The refined XRD pattern is shown in Figure 1. The particle size of the material is ranging from 40 – 250 nm. Figure 2 is showing the charge-discharge voltage profile with reversible capacity of around 176 mAhg-1 at C/20 rate within 1,5-4,5V involving Fe3+/2+ redox potential of 2.8 V vs Li0/Li+. Figure 3 is showing the cycling stability and a c-rate test. In addition to that ex-situ characterization of charged and charged-discharged state LiFeBO3 with TEM, XRD and Mössbauer measurements have been performed and will be presented and discussed.


1       A. K. Padhi, K. S. Nanjundaswamy, J. B. Goodenough and goodenough, J. Electrochem. Soc., 1997, 144, 1188–1194.

2       A. Yamada, N. Lwane, Y. Harada, S. I. Nishimura, Y. Koyama and L. Tanaka, Adv. Mater., 2010, 22, 3583–3587.