Meng Zhaohui, Wang Suhong, Wang Hongwei, Wang Lijuan, Wang Song
College of Chemistry and Pharmaceutical Engineering, Nanyang Normal University Nanyang 473061 China.
School of Chemistry and Material Science, Liaoning Shihua University Fushun 113001 Liaoning China
RSC Adv. 2019 Jul 2;9(36):20618-20623. doi: 10.1039/c9ra03846a. eCollection 2019 Jul 1.
LiZnTiOC@LaO (LZTO@C@LaO) coated with composite protective layers is successfully fabricated a facile solid-state route. The co-coating strategy greatly improves the electrochemical performance of LZTO. 89.8%, 77.2% and 76.7% of the discharge specific capacities for the 2nd cycle can be retained at the 200th cycle at 1, 2 and 3 A g, respectively. At 4 and 5 A g, 174.3 and 166.1 are still retained for the 100th cycle, respectively. Even at a high temperature of 55 °C, LZTO@C@LaO still has good cycling performance. The excellent electrochemical performance is due to the stable surface structure between LZTO and the electrolyte, a good conductive network, small particle size, and large specific surface area as well as pore volume.
通过简便的固态路线成功制备了涂覆有复合保护层的LiZnTiOC@LaO（LZTO@C@LaO）。这种共包覆策略极大地提高了LZTO的电化学性能。在1、2和3 A g的电流密度下，第200次循环时第2次循环的放电比容量分别可保留89.8%、77.2%和76.7%。在4和5 A g的电流密度下，第100次循环时分别仍保留174.3和166.1。即使在55℃的高温下，LZTO@C@LaO仍具有良好的循环性能。优异的电化学性能归因于LZTO与电解质之间稳定的表面结构、良好的导电网络、小粒径、大比表面积以及孔体积。
