材料科学与光电技术学院 CMO

Ion conducting Li₂SiO₃-coated lithium-rich layered oxide exhibiting high rate capability and low polarization

Enyue Zhao , Xiangfeng Liu , Hu Zhao , Xiaoling Xiao * and Zhongbo Hu * 

College of Materials Science and Opto-electronic Technology, University of Chinese Academy of Sciences, Beijing 100049, P. R. China. E-mail: xlxiao@ucas.ac.cn; huzq@ucas.ac.cn; Tel: +86 10 8825 6655 Tel: +86 10 8825 6328

Lithium-rich Li_1.13Ni_0.30Mn_0.57O₂ has been functionally modified with fast Li⁺-ion conducting Li₂SiO₃via a facile and novel method, based on the reaction between Ni_0.35Mn_0.65C₂O₄·xH₂O and Si(OC₂H₅)₄. Due to the unique Li₂SiO₃ coating layer which greatly improves the Li⁺ ion diffusion rate, Li₂SiO₃@Li_1.13Ni_0.30Mn_0.57O₂ exhibits outstanding rate capability, cycle stability and low polarization.

http://pubs.rsc.org/en/content/articlehtml/2015/CC/C5CC00383K