Building interface bonding and shield for stable Li-rich Mn-based oxide cathode
- Central South University, Changsha (China)
- Argonne National Laboratory (ANL), Argonne, IL (United States)
- Manchester Metropolitan University (United Kingdom)
- Argonne National Laboratory (ANL), Argonne, IL (United States); Stanford University, CA (United States)
Implementation of Li-rich Mn-based oxide cathode with high-energy-density has been restrained by capacity/voltage degradation that results from irreversible lattice oxygen loss and structure rearrangements. To resolve these challenges, in this work, Li1.2Mn0.54Ni0.13Co0.13O2 encapsulated by amorphous CoxB (CB-LRM) is rationally designed via autocatalytic plating for highly reversible cationic/anionic hybrid cathode material. Band coherency is ingeniously evoked by interface-reconstruction between bulk structure and amorphous coating layer, which lower the energy of O $2p$ states. Furthermore, this is associated with strengthened orbital hybridization of O $2p$-Mn $3d$ and increased formation energy of oxygen vacancy, which mitigates the lattice oxygen loss considerably. Additionally, interface shielding effects that protect electrode against electrolyte corrosion and the reduction of surface oxygen are also present with fully coverage of amorphous CoxB coating layer. As a result, the as-designed CBLRM cathode exhibits excellent cycle stability after 100 loops with only 0.154% per cycle capacity fade and improved voltage degradation. Given this, this work provides a potential avenue for rational design of lattice oxygen-based electrode materials with high-energy-density.
- Research Organization:
- Argonne National Laboratory (ANL), Argonne, IL (United States)
- Sponsoring Organization:
- USDOE Office of Energy Efficiency and Renewable Energy (EERE), Office of Sustainable Transportation. Vehicle Technologies Office (VTO); USDOE Office of Science (SC), Basic Energy Sciences (BES). Scientific User Facilities (SUF); National Natural Science Foundation of China (NSFC)
- Grant/Contract Number:
- AC02-06CH11357
- OSTI ID:
- 2217019
- Journal Information:
- Energy Storage Materials, Journal Name: Energy Storage Materials Vol. 52; ISSN 2405-8297
- Publisher:
- ElsevierCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Similar Records
Structure/Interface Coupling Effect for High-Voltage LiCoO2 Cathodes
Constructing uniform oxygen defect engineering on primary particle level for high-stability lithium-rich cathode materials