Promoting reversibility of layered potassium cathode through interstitial doping
- Fudan Univ., Shanghai (China)
- Shanghai Jiao Tong Univ. (China)
- Brookhaven National Laboratory (BNL), Upton, NY (United States)
With the increasing needs for large-scale and low-cost energy storage devices, Mn-based layered oxide cathodes have achieved considerable researching interests for potassium-ion batteries owing to their high energy density, abundant resource and low toxicity. However, their developments are challenged by the absence of suitable cathode materials to tolerate large-sized K-ion insertion/extraction and the presence of Jahn-Teller distortion of Mn3+. To address this issue, here we present a strategy of embedding boron into interstitial tetrahedral sites to obtain a P3-K0.5Mn0.8Co0.2B0.1O2 cathode. Strong B-O covalent bonds facilitate the construction of robust orthorhombic framework and alleviate the undesired elongation of Mn-O bonds, contributing to excellent electrochemical performance. In addition, boron ions are verified to promote the formation of a homogeneous cathode electrolyte interphase layer, improving interfacial stability and realizing highly reversible cycling in a wide voltage range (1.4-4.3 V). This strategy provides a new pathway towards the development of high-performance cathode materials for potassium-ion batteries.
- Research Organization:
- Brookhaven National Laboratory (BNL), Upton, NY (United States)
- Sponsoring Organization:
- USDOE Office of Energy Efficiency and Renewable Energy (EERE), Office of Sustainable Transportation. Vehicle Technologies Office (VTO); National Natural Science Foundation of China (NSFC)
- Grant/Contract Number:
- SC0012704; 52071085; 52101242
- OSTI ID:
- 2204632
- Report Number(s):
- BNL-224961-2023-JAAM
- Journal Information:
- Chemical Engineering Journal, Vol. 477; ISSN 1385-8947
- Publisher:
- ElsevierCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Similar Records
Whole‐Voltage‐Range Solid‐Solution Reaction in Layered Oxide Cathode of Sodium‐Ion Batteries
Layered P2‐Type K 0.65 Fe 0.5 Mn 0.5 O 2 Microspheres as Superior Cathode for High‐Energy Potassium‐Ion Batteries