Journal
MATERIALS RESEARCH BULLETIN
Volume 145, Issue -, Pages -Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.materresbull.2021.111555
Keywords
A; ceramics; A; composites; B; sol-gel chemistry; C; electrochemical measurements; D; ionic conductivity
Categories
Funding
- Government of India projects [DSTCRG/2019/001442]
- DST-SERB [EMR/2015/000275, CSR-IC-BL-52/CRS-169/2016-17/833]
- Department of Physics, BITS Pilani (RJ) India [SR/FST/PS-1/2017/30]
- CSIR Government of India
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Ionic liquid dispersed Li+-Nasicon composites with significantly improved conductivity and good stability have been prepared and characterized. These composites show promise as electrolytes in lithium-ion batteries for low power devices.
Ionic liquid dispersed Li+-Nasicon (LiTi2(PO4)3) composites have been prepared and systematically characterized. For this, the LiTi2(PO4)3 (LTP) has been synthesized by the sol-gel route to accommodate ionic liquid (IL) in a significant amount. The composite pellets exhibit nearly three orders of magnitude rise in conductivity as compared to LTP. High-temperature XRD along with TGA results suggest that these composites are stable at least up to 300 degrees C. The composites were also electrochemically characterized as an electrolyte in Li|LiCoO2 cells. These exhibit appreciable stability against lithium and are found to be suitable for low power devices. A mechanism for electrical transport has been proposed based on experimental evidences that suggest these composites as predominantly Li+ion conductors, and ionic liquid facilitates Li+ion transport by lowering the barriers at grain boundaries.
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