An attempt has been made to synthesize boron-substituted cubic spinel throu
gh solid state (SS) and solution route (SR) techniques. The synthesized spi
nels have been examined for their physical and electrochemical characterist
ics through ex situ-X-ray diffractometry (XRD) and SEM, as well as by charg
e-discharge cycling and diffusion coefficient measurements. X-ray diffracti
on reveals boron elimination from boron-substituted spinel (SR-B spinel) re
sulting in phase splitting to lithium berate glass formation and parent cub
ic spinel when subjected to heating at and above 600 degreesC. Synthesis th
rough SR with precursor material calcined at 500 degreesC only provides hig
h discharge capacity with good cyclability. The measurement of diffusion co
efficient of lithium supports that boron got substituted at 16d site in Fd
(3) over barm spinel structure. This paper discusses the mechanism underlyi
ng the stability of boron-substituted spinel and the suitability of LiB1/9M
n17/9O4 as a promising positive electrode candidate for lithium ion battery
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