TITLE:
Electrode Property of Sintered Ceramic Based on CaMnO3 in LiOH Aqueous Solution
AUTHORS:
Takao Esaka, Yuhta Adachi
KEYWORDS:
Calcium Manganese Oxide, Lithium Hydroxide, Battery, Cathode Material
JOURNAL NAME:
Journal of Materials Science and Chemical Engineering,
Vol.2 No.4,
April
23,
2014
ABSTRACT: Sintered ceramics of Ca0.9A0.1MnO3-δ(A = La, Nd, Sm, Gd and Y) were studied on their cathode properties in LiOHaq. solution. After firing, the samples were obtained as high conductivity sintered
(porous) materials composed of an orthorhombic perovskite-type phase. Next,
charge discharge performances of the electrodes consisting of the sintered
sample were investigated. The discharge capacity of Ca0.9Y0.1MnO3-δwas 185 mAh·g-1on the 1st cycling, and the 1st charging was
possible by 130 mAh·g-1. However, the 2nd discharge capacity
remarkably decreased to lower than 50 mAh·g-1. Considering no
obvious charging property on the previous La-substituted sample of Ca0.9La0.1MnO3-δ,
it would mean that change of the substituent for CaMnO3 affects the
electrochemical property. The roll of lithium ions, the effect of the cut-off
potential range on the cycle performance would be discussed leading to the
charge/discharge results of the cell (-)Zn/LiOHaq./Ca0.9Y0.1MnO3-δ(+).