Potassium naphthalene-1,4,5,8-tetracarboxylate (KNTC, 117 mAh g) is a new organic anode for K-ion batteries, which possesses four strong K-O ionic bonds within a -4-valent naphthalene-1,4,5,8-tetracarboxylate skeleton (NTC). And thus, KNTC is a polyanionic organic salt. Simultaneously, new insights are provided by comparing two typical electrolyte systems (carbonate and ether electrolytes) with KPF as the same solute. Finally, the pure organic K-ion batteries (OKIBs) are fabricated by using perylene-3,4,9,10-tetracarboxydianhydride (PTCDA) as the organic cathode and the reduced state (KNTC) of KNTC as the anode. And this OKIB can deliver a peak discharge capacity of 121 mAh g and run over 1500 cycles in 0.5-3 V using ether electrolytes.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1021/acsami.1c09709 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Solubility-Limited Small Molecule for Stable High-Capacity Potassium Storage.
Small
December 2024
State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, Jiangsu, 210023, P. R. China.
Small molecule electrode materials with superb redox activity have significant applied implications for K-ion storage, but they face significant challenges like high solubility in electrolytes and low conductivity, limiting their capacity, rate, and cycling stability. Herein, a series of Ni-bis(dithiolene) (NiS)-based small molecules are designed with control of various redox-active substitutional groups for K-ion batteries anode materials. It is identified that bis[1,2-di(pyridine-4-yl) ethylene-1,2-dithiolate] nickel Ni[CSPy] demonstrates a high reversible specific capacity (399 mAh g at 0.
View Article and Find Full Text PDFA bismuth oxide-modified copper host achieving bubble-free and stable potassium metal batteries.
Chem Sci
January 2025
Siyuan Laboratory, Guangdong Provincial Engineering Technology Research Center of Vacuum Coating Technologies and New Energy Materials, College of Physics & Optoelectronic Engineering, Department of Physics, Jinan University Guangzhou 510632 China
Due to the minimal electrochemical oxidation-reduction potential, the potassium (K) metal anode has emerged as a focal in K-ion batteries. However, the reactivity of the K metal anode leads to significant side reactions, particularly gas evolution. Mitigating gas generation from K metal anodes has been a persistent challenge in the field.
View Article and Find Full Text PDFSpatially confined transition metals boost high initial coulombic efficiency in alloy anodes.
Chem Sci
December 2024
College of Physics, Weihai Innovation Research Institute, College of Materials Science and Engineering, Qingdao University Qingdao 266071 China
Article Synopsis
- Alloy-type materials show great potential as high energy density anodes for lithium-ion batteries but are limited by poor initial coulombic efficiency due to volume expansion and reaction reversibility issues.
- The study introduces NiO/SnO multilayers that create Ni nanoparticles to enhance lithium reaction processes, resulting in a high initial coulombic efficiency of 92.3% and a capacity of 1247 mA h g with excellent retention after 800 cycles.
- Additionally, this anode design performs well in Na/K-ion batteries and similar frameworks improve lithium storage properties, indicating a promising direction for future alloy-type anode advancements.
Synthesis-Structure-Property of High-Entropy Layered Oxide Cathode for Li/Na/K-Ion Batteries.
Adv Mater
January 2025
Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen, 518055, China.
Article Synopsis
- Increasing demand for rechargeable batteries highlights the need for better electrochemical performance, as traditional methods like elemental doping and surface modification fall short.
- High-entropy materials (HEMs) provide a promising solution due to their stability and flexible composition, leading to enhancements in battery properties, particularly in high-entropy layered oxide cathode materials for various ion batteries.
- The review emphasizes the importance of precise synthesis, understanding reaction mechanisms, and the integration of computational and experimental methods to inspire future research in creating high-performing rechargeable batteries.
Rigid-Flexible Coupling Realized by Synergistic Engineering of the Graphitic-Amorphous Architecture for Durable and Fast Potassium Storage.
Adv Sci (Weinh)
January 2025
State Key Laboratory of Organic-Inorganic Composites, Beijing Key Laboratory of Electrochemical Process and Technology for Materials, Beijing University of Chemical Technology, Beijing, 100029, China.
Article Synopsis
- Graphite anodes show promise for potassium-ion batteries (PIBs), but their use is limited due to poor performance linked to significant expansion during cycling.
- Researchers developed a new type of carbon, called partial graphitic carbon (PGC), that balances highly graphitized areas for potassium ion absorption with amorphous carbon regions that support expansion and ion movement.
- The optimized PGC12 electrode demonstrated impressive performance, achieving a reversible capacity of 281.9 mAh/g, excellent cycle stability, and a high energy density of 148.2 Wh/kg, showcasing potential for enhanced K-ion storage in future PIB designs.
Want 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!