TY - JOUR
T1 - High-rate performance of ferroelectric BaTiO3-coated LiCoO2 for Li-ion batteries
AU - Teranishi, Takashi
AU - Yoshikawa, Yumi
AU - Sakuma, Ryo
AU - Hashimoto, Hideki
AU - Hayashi, Hidetaka
AU - Kishimoto, Akira
AU - Fujii, Tatsuo
PY - 2014/10/6
Y1 - 2014/10/6
N2 - The high charge-discharge rate characteristics of composite cathodes consisting of ferroelectric BaTiO3 (BT)-coated LiCoO2 (LC), synthesized via a simple sol-gel route, were evaluated, and the rate showed stepwise increases to as high as 5C. The LC-BT composite cathode annealed at 600°C, LC-BT-600, notably retained high capacities, i.e., 122 mAh/g at 30 cycles, 5C and 99 mAh/g at 60 cycles, 5C. These capacities corresponded to 83% and 67% of the initial values and were as high as 158% and 245% of the capacities of bare LC over the same cycles, respectively. The ferroelectricity of the coated BT contributed to the improvement in high-rate performance.
AB - The high charge-discharge rate characteristics of composite cathodes consisting of ferroelectric BaTiO3 (BT)-coated LiCoO2 (LC), synthesized via a simple sol-gel route, were evaluated, and the rate showed stepwise increases to as high as 5C. The LC-BT composite cathode annealed at 600°C, LC-BT-600, notably retained high capacities, i.e., 122 mAh/g at 30 cycles, 5C and 99 mAh/g at 60 cycles, 5C. These capacities corresponded to 83% and 67% of the initial values and were as high as 158% and 245% of the capacities of bare LC over the same cycles, respectively. The ferroelectricity of the coated BT contributed to the improvement in high-rate performance.
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U2 - 10.1063/1.4898006
DO - 10.1063/1.4898006
M3 - Article
AN - SCOPUS:84908004742
SN - 0003-6951
VL - 105
JO - Applied Physics Letters
JF - Applied Physics Letters
IS - 14
M1 - 143904
ER -