Premium
Sputter‐Deposited Amorphous LiCuPO 4 Thin Film as Cathode Material for Li‐ion Microbatteries
Author(s) -
Sugiawati Vinsensia Ade,
Vacandio Florence,
Knauth Philippe,
Djenizian Thierry
Publication year - 2018
Publication title -
chemistryselect
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 34
ISSN - 2365-6549
DOI - 10.1002/slct.201702429
Subject(s) - materials science , amorphous solid , sputtering , electrochemistry , cathode , scanning electron microscope , lithium (medication) , thin film , ion , analytical chemistry (journal) , electrode , chemical engineering , nanotechnology , composite material , crystallography , chemistry , medicine , organic chemistry , chromatography , endocrinology , engineering
We report the electrochemical performance of amorphous LiCuPO 4 thin films obtained by radio frequency sputtering as a cathode material for Li‐ion microbatteries. The thin films were characterized by X‐ray diffraction, scanning electron microscopy, profilometry and electrochemical techniques. Charge/discharge profiles and cycling performance were evaluated in lithium electrochemical test cells. Cyclic voltammogram of the LiCuPO 4 film shows the typical redox reaction peak at ∼ 1.9 V vs . Li/Li + . A discharge capacity of 160 mAh g −1 (50 μAh cm −2 ) is attained for the first cycle at C/10 to reach a stable capacity of 70 mAh g −1 (22 μAh cm −2 ) with good stability over 160 cycles. For comparison, the electrochemical performance of a crystalline LiCuPO 4 film was investigated. The first discharge could deliver a high capacity of around 375 mAh g −1 at C/10, but the capacity decayed quickly to a low capacity of 11 mAh g −1 over 50 cycles. The results show that the LiCuPO 4 amorphous materials can be considered as the exciting cathode candidate for Li‐ion microbatteries.