Simultaneous Coating and Doping of a Nickel-Rich Cathode by an Oxygen Ion Conductor for Enhanced Stability and Power of Lithium-Ion Batteries

• DOI: 10.1021/acsami.9b10310
• Publication Date: 2019-08-23T12:55:50Z
• Authors: Lifan Wang; Gaoyang Liu; Xianan Ding; Chun Zhan; Xindong Wang
• Keywords: Nickel oxide

With the rapid development of plug-in hybrid electric vehicles and vehicles, high-energy layered lithium nickel-rich oxides have received much attention, but there are still many challenges due to inherent properties materials. The poor cycling performance initial capacity loss oxide associated with structural stability material Li+/Ni2+ cation disorder. Moreover, synergistic effect vacancy Li Ni in delithiation process aggravates instability oxygen, eventually resulting release oxygen. It can cause damage structure even safety issues. In this work, we report that Ce0.8Dy0.2O1.9 solid electrolyte inhibits oxygen improves Ni-rich cathode material, which is rich vacancies. Besides, Ni2+ could be oxidized Ni3+ along strong oxidation Ce4+ doping into bulk structure, suppresses disorder Coulomb efficiency material. This study successfully designed a novel provide basis for future oxides, used improve cycle life.