AUTHOR=Hu Wei , Zhong Shengwen , Rao Xianfa , Yan Tingting , Zeng Min 

TITLE=The Stabilizing Effect of Li4Ti5O12 Coating on Li1.1Ni0.35Mn0.55O2 Cathode for Liquid and Solid–State Lithium-Metal Batteries

JOURNAL=Frontiers in Energy Research

VOLUME=10

YEAR=2022

URL=https://www.frontiersin.org/journals/energy-research/articles/10.3389/fenrg.2022.869404

DOI=10.3389/fenrg.2022.869404

ISSN=2296-598X

ABSTRACT=<p>Li–rich layered cathode materials with high energy density suffer from severe capacity decay during cycling, which is associated with volume change and electrolyte corrosion during (de)lithiation. A Li<sup>+</sup> ionic conducting Li<sub>4</sub>Ti<sub>5</sub>O<sub>12</sub> coating with high structural integrity is developed on Li<sub>1.1</sub>Ni<sub>0.35</sub>Mn<sub>0.55</sub>O<sub>2</sub> cathodes <italic>via</italic> a dry powder coating method. The electrochemical performances of Li<sub>4</sub>Ti<sub>5</sub>O<sub>12</sub>–coated Li<sub>1.1</sub>Ni<sub>0.35</sub>Mn<sub>0.55</sub>O<sub>2</sub> cathodes in liquid and solid–state lithium batteries were investigated. The initial discharge capacity of Li<sub>4</sub>Ti<sub>5</sub>O<sub>12</sub>–coated Li<sub>1.1</sub>Ni<sub>0.35</sub>Mn<sub>0.55</sub>O<sub>2</sub> in the liquid electrolyte has been improved from 116.5 mA h g<sup>−1</sup> to 123.7 mA h g<sup>−1</sup> at 0.1°C. An impressive cyclability with a high capacity retention of 89.3% was achieved in solid–state lithium batteries. These results demonstrate that the Li<sub>4</sub>Ti<sub>5</sub>O<sub>12</sub> coating plays an essential role in enhancing the specific capacity and better performance for Li<sub>1.1</sub>Ni<sub>0.35</sub>Mn<sub>0.55</sub>O<sub>2</sub> cathode.</p>