Ni-rich layered oxides are promising cathode materials for developing high-energy lithium-ion batteries. To overcome the major challenge of surface degradation, a TiO surface coating based on polydopamine (PDA) modification was investigated in this study. The PDA precoating layer had abundant OH catechol groups, which attracted Ti(OEt) molecules in ethanol solvent and contributed towards obtaining a uniform TiO nanolayer after calcination. Owing to the uniform coating of the TiO nanolayer, TiO -coated PDA-LiNi Co Mn O (TiO -PNCM) displayed an excellent electrochemical stability during cycling under high voltage (3.0-4.5 V vs. Li /Li), during which the cathode material undergoes a highly oxidative charge process. In addition, TiO -PNCM exhibited excellent cyclability at elevated temperature (60 °C) compared with the bare NCM. The surface degradation of the Ni-rich cathode material, which is accelerated under harsh cycling conditions, was effectively suppressed after the formation of an ultra-thin TiO coating layer.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1002/cssc.201902998 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Multi-heterointerface charge transfer in amine-functionalized cadmium sulfide-copper sulfide@titanium dioxide hollow spheres with rich oxygen vacancies for carbon dioxide photoreduction.
J Colloid Interface Sci
December 2024
Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education of the People's Republic of China, Heilongjiang University, Harbin 150080, PR China. Electronic address:
Photocatalytically reducing CO into high-value-added chemical materials has surfaced as a viable strategy for harnessing solar energy and mitigating the greenhouse effect. But the inadequate separation of the photogenerated electron-hole pair remains a major obstacle to CO photoreduction. Constructing heterostructure photocatalysts with efficient interface charge transfer is a promising approach to solving the above problems.
View Article and Find Full Text PDFSymmetric Dopant-Free Si Solar Cells Enabled by TiO Nanolayers: An In-Depth Study on Bipolar Carrier Selectivity.
Adv Sci (Weinh)
November 2024
Department of Materials, University of Oxford, Parks Rd, Oxford, OX1 3PH, UK.
Article Synopsis
- * The selectivity of the TiO layers is influenced by the oxidation process and the choice of titanium precursor, allowing for tailored band bending that promotes charge separation in crystalline silicon solar cells.
- * Investigations reveal that the unique properties of the TiO layers stem from the fixed negative charges generated during their deposition, emphasizing the importance of a thin silicon oxide layer at the interface for chemical passivation and overall efficiency.
A comprehensive adsorption and desorption study on the interaction of DNA oligonucleotides with TiO nanolayers.
Phys Chem Chem Phys
August 2024
Institute for Advanced Studies in Precision Materials, Yantai University, Yantai, Shandong 264005, China.
The utilization of TiO nanolayers that possess excellent biocompatibility and physical properties in DNA sensing and sequencing remains largely to be explored. To examine their applicability in gene sequencing, a comprehensive study on the interaction of DNA oligonucleotides with TiO nanolayers was performed through adsorption and desorption experiments. TiO nanolayers with 10 nm thickness were fabricated magnetron sputtering onto a 6-inch silicon wafer.
View Article and Find Full Text PDFLayered Heterostructure of Graphene and TiO as a Highly Sensitive and Stable Photoassisted NO Sensor.
ACS Appl Mater Interfaces
August 2024
Institute of Physics, University of Tartu, W. Ostwald Street 1, Tartu 50411, Estonia.
As an atomically thin electric conductor with a low density of highly mobile charge carriers, graphene is a suitable transducer for molecular adsorption. In this study, we demonstrate that the adsorption properties can be significantly enhanced with a laser-deposited TiO nanolayer on top of single-layer CVD graphene, whereas the effective charge transfer between the TiO-adsorbed gas molecules and graphene is retained through the interface. The formation of such a heterostructure with optimally a monolayer thick oxide combined with ultraviolet irradiation (wavelength 365 nm, intensity <1 mW/mm) dramatically enhances the gas-sensing properties.
View Article and Find Full Text PDFAtomically Resolved Phase Coexistence in VO Thin Films.
ACS Nano
May 2024
Zernike Institute for Advanced Materials, University of Groningen, Nijenborgh 4, 9747 AG Groningen, The Netherlands.
Concurrent structural and electronic transformations in VO thin films are of 2-fold importance: enabling fine-tuning of the emergent electrical properties in functional devices, yet creating an intricate interfacial domain structure of transitional phases. Despite the importance of understanding the structure of VO thin films, a detailed real-space atomic structure analysis in which the oxygen atomic columns are also resolved is lacking. Moreover, intermediate atomic structures have remained elusive due to the lack of robust atomically resolved quantitative analysis.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!