Pressure helps to make better Li-ion batteries

phys.org | 11/14/2018 | Staff
smnth28 (Posted by) Level 3
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Lithium titanium oxide (Li4Ti5O12, LTO), a "zero-strain" anode material for Li-ion batteries (LIBs), exhibits excellent cycling performance. However, it shows poor conductivity, which is the major drawback and limits its applications. In a recent paper published in National Science Review, it is reported that static compression can highly improve the conductivity of LTO by pressure-induced amorphization and promoting ion migration defects for Li+. The results suggest amorphous LTO is a better anode material for LIBs.

Rechargeable Li-ion batteries are crucial parts for home electronics and portable devices such as cell phones and laptops. One can imagine how the life we have today would be like without cell phones and internet. Li-ion batteries (LIBs) are also growing in popularity for electric vehicle which can help to highly reduce the emission of CO2 and diminish the serious greenhouse effect on the earth. All these demands call for superior Li-ion battery materials with better performance such as higher capacity, longer life time, lower cost, etc.

Lithium - Titanium - Oxide - Li4Ti5O12 - LTO

Lithium titanium oxide (Li4Ti5O12, LTO) spinel experiences negligible volume change during lithium insertion and extraction and is regarded as a "zero-strain" anode material for LIBs. Due to its great structural stability, LTO exhibits excellent cycling performance, making it a promising anode for LIBs in electrical vehicle and large-scale energy storage areas. However, LTO shows poor electronic and ionic conductivities, limiting its applications. Therefore, improving its conductivity becomes crucial.

In a recent research article published in the Beijing-based National Science Review, scientists at the Center for High...
(Excerpt) Read more at: phys.org
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