AI Article Synopsis
- The main issues with using SnO in lithium-ion battery anodes are significant volume changes during charging and discharging, leading to capacity loss and poor efficiency, especially during the first cycle.
- Researchers developed a new composite material combining ultrafine SnO nanoparticles with Co nanocrystals in a carbon matrix, which helps prevent structural damage and enhances battery performance.
- The resulting electrodes showed high initial efficiency (82.2%), excellent charging capabilities, and impressive cycling stability, paving the way for future advancements in battery electrodes using similar materials.
Article Abstract
The two major limitations in the application of SnO for lithium-ion battery (LIB) anodes are the large volume variations of SnO during repeated lithiation/delithiation processes and a large irreversible capacity loss during the first cycle, which can lead to a rapid capacity fade and unsatisfactory initial Coulombic efficiency (ICE). To overcome these limitations, we developed composites of ultrafine SnO nanoparticles and in situ formed Co(CoSn) nanocrystals embedded in an N-doped carbon matrix using a Co-based metal-organic framework (ZIF-67). The formed Co additives and structural advantages of the carbon-confined SnO/Co nanocomposite effectively inhibited Sn coarsening in the lithiated SnO and mitigated its structural degradation while facilitating fast electronic transport and facile ionic diffusion. As a result, the electrodes demonstrated high ICE (82.2%), outstanding rate capability (~ 800 mAh g at a high current density of 5 A g), and long-term cycling stability (~ 760 mAh g after 400 cycles at a current density of 0.5 A g). This study will be helpful in developing high-performance Si (Sn)-based oxide, Sn/Sb-based sulfide, or selenide electrodes for LIBs. In addition, some metal organic frameworks similar to ZIF-67 can also be used as composite templates.
Download full-text PDF |
Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7770651 | PMC |
| http://dx.doi.org/10.1007/s40820-019-0246-4 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Hierarchical S-Doped Vanadium MOFs with Multiwalled Carbon Nanotubes: A Robust Bifunctional Catalyst for Efficient Water Electrolysis.
Langmuir
January 2025
Department of Chemistry, Bharathiar University, Coimbatore 641 046, India.
Developing nonprecious metal-based electrocatalysts with exceptional activity and durability for water electrolysis remains a significant challenge. Herein, we report a highly efficient bifunctional electrocatalyst composed of sulfur-doped vanadium metal-organic frameworks (S@V-MOF) integrated with multiwalled carbon nanotubes (MWCNTs) to promote the synergistic effect between S@V-MOF and MWCNTs and modulate the electronic structure of the catalyst, which eventually enhanced its electrocatalytic performance. The S@V-MOF/MWCNT catalyst loaded at the Ni foam electrode exhibits remarkable activity for both the hydrogen evolution reaction (HER) in acidic media and oxygen evolution reaction (OER) in alkaline media, requiring overpotentials of 48 and 227 mV, respectively, to reach a current density of 10 mA cm.
View Article and Find Full Text PDFGold Single Atom Doped Defective Nanoporous Copper Octahedrons for Electrocatalytic Reduction of Carbon Dioxide to Ethylene.
ACS Nano
January 2025
Songshan Lake Materials Laboratory (SLAB), Dongguan 523808, P. R. China.
Electrocatalytic CO reduction into high-value multicarbon products offers a sustainable approach to closing the anthropogenic carbon cycle and contributing to carbon neutrality, particularly when renewable electricity is used to power the reaction. However, the lack of efficient and durable electrocatalysts with high selectivity for multicarbons severely hinders the practical application of this promising technology. Herein, a nanoporous defective AuCu single-atom alloy (De-AuCu SAA) catalyst is developed through facile low-temperature thermal reduction in hydrogen and a subsequent dealloying process, which shows high selectivity toward ethylene (CH), with a Faradaic efficiency of 52% at the current density of 252 mA cm under a potential of -1.
View Article and Find Full Text PDFModulating Electronic Density of Single-Atom Ni Center by Heteroatoms for Efficient CO Electroreduction.
Small
January 2025
CAS Key Laboratory of Science and Technology on Applied Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, China.
Single-atom catalysts (SACs) with unique geometric and electronic configurations have triggered great interest in many important reactions. However, controllably modulating the electronic structure of metal centers to enhance catalytic performance remains a challenge. Here, the electronic structure of Ni centers over Ni-NC SACs by introducing electron-rich phosphorus or electron-deficient boron for electrochemical CO reduction (CORR) is systematically tailored.
View Article and Find Full Text PDFElectrooxidation of Ethylene Glycol to Glycolic Acid with Pt-Ni(OH)2 Catalysts: High Efficiency and Selectivity for PET Plastics Upgrading.
Chem Asian J
January 2025
Renmin University of China, Department of Chemistry, No 59 Zhongguancun St,, 100872, Beijing, CHINA.
The electroconversion of polyethylene terephthalate (PET) into C2 fine chemicals and hydrogen (H2) presents a promising solution for advancing the circular plastics economy. In this study, we report the electrooxidation of ethylene glycol (EG) to glycolic acid (GA) using a Pt-Ni(OH)2 catalyst, achieving a high Faraday efficiency (>90%) even at high current densities (250 mA cm-2 at 0.8 V vs.
View Article and Find Full Text PDFEnhanced K-storage kinetics for N-doped carbon via controllable dedoping strategy.
Chemistry
January 2025
Nanjing University of Aeronautics and Astronautics, School of Materials Science and Engineering, 29 Yudao St., 210016, Nanjing, CHINA.
As a potential alternative to next-generation LIBs, carbonous materials have garnered significant attention as anode materials for potassium-ion batteries due to their low cost and environmental friendliness. However, carbonaceous materials cannot fulfill the demand of anode for PIBs, due to volume expansion and poor stability during charging/discharging process. It is well-known that N doping can provide active sites for K-storage, and expand the layer distance between graphite layers.
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!