Lithium-sulfur (Li-S) battery with a sulfurized polyacrylonitrile cathode is a promising alternative to Li-ion systems. However, the sluggish charge transfer of cathode and accumulation of inactive Li on anode remain persistent challenges. An advanced electrolyte additive with function towards both cathode and anode holds great promise to address these issues. Herein, we present a new strategy to boost sulfur activity and rejuvenate dead Li simultaneously. In the polar electrolyte containing I-LiNO additives, I /IO are triggered significantly by the reaction between NO and I ions. The I /IO are reactive to insulated LiS product of cathode and inactive Li on anode, thus accelerating the conversion reaction of sulfur and recovering Li sources back to battery cycling. The in situ/ex situ spectroscopic and morphologic monitoring reveal the crucial role of iodine in promoting LiS dissociation and inhibiting dendritic Li growth. With the modified electrolyte, the symmetric Li||Li cells deliver a lifespan of 4000 h with an overpotential less than 12 mV at 0.5 mA cm. For Li-S cells, 100 % capacity retention up to thousands of cycles and enhanced rate capability are available. This work demonstrates a feasible strategy on electrolyte engineering for practical applications of Li-S batteries.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1002/anie.202401055 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Contributions of Both the Eastman Entropy of Transfer and Electric Double Layer to the Electromotive Force of Ionic Thermoelectric Supercapacitors.
ACS Appl Mater Interfaces
January 2025
Global Zero Emission Research Center, National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba 16-1 Onogawa, Tsukuba, Ibaraki 305-8569, Japan.
Recently, ionic thermoelectric supercapacitors have gained attention because of their high open circuit voltages, even for ions that are redox inactive. As a source of open circuit voltage (electromotive force), an asymmetry in electric double layers developed by the adsorption of ions at the electrode surfaces kept at different temperatures has previously been proposed. As another source, the Eastman entropy of transfer, which is related to the Soret coefficient, has been considered.
View Article and Find Full Text PDFN,O Co-Doped Carbon Spheres Enable Stable Anode-Less Sodium Metal Batteries.
Small Methods
January 2025
Hunan Provincial Key Laboratory of Chemical Power Sources, College of Chemistry and Chemical Engineering, Central South University, Changsha, 410083, P. R. China.
Anode-less sodium metal batteries (SMBs) suffer from the formation of Na dendrites and inactive Na on an anode substrate though showing advantages of high energy densities and low costs. Herein, N,O co-doped carbon spheres (NOCS), which are synthesized via a scalable polymerization and pyrolysis method, are employed as a thin and stable sodiophillic nucleation layer on the Cu foil. Combined with electrochemical measurements, Na deposition morphology observations and density functional theory calculations, it is revealed that the introduced N and O heteroatoms can greatly enhance the adsorption of Na on the carbon substrate and reduce the nucleation overpotential, thus forming sufficient seeding sites and guiding homogeneous Na deposition.
View Article and Find Full Text PDFSelective cesium extraction from highly saline solution using hybrid capacitive deionization with zinc-doped manganese hexacyanoferrate electrode.
J Hazard Mater
December 2024
Key Laboratory of Materials Physics, Anhui Key Laboratory of Nanomaterials and Nanotechnology, Institute of Solid State Physics, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, PR China; Science Island Branch of Graduate School, University of Science and Technology of China, Hefei 230026, PR China. Electronic address:
Recently, hybrid capacitive deionization (HCDI) has garnered significant attention for its potential in the selective extraction of cesium (Cs) from radioactive wastewater and salt lakes, which is crucial for resolving the supply-demand imbalance of cesium resources and eliminating radioactive contamination. However, developing HCDI electrodes capable of effectively separating and extracting Cs remains a significant challenge. In this work, we proposed an innovative strategy involving the doping of inactive metal ions to develop zinc-doped manganese hexacyanoferrate (ZMFC) as an HCDI cathode.
View Article and Find Full Text PDFMXenes Spontaneously Form Active and Selective Single-Atom Centers under Anodic Polarization Conditions.
J Am Chem Soc
January 2025
Faculty of Chemistry, Theoretical Catalysis and Electrochemistry, University Duisburg-Essen, Universitätsstraße 5, Essen 45141, Germany.
Single-atom catalysts (SACs) have emerged as a new class of materials for the development of active and selective catalysts. These materials are commonly based on anchoring a noble transition metal to some kind of carrier. In the present work, we demonstrate that MXenes─two-dimensional materials with application in energy storage and conversion─spontaneously form SAC-like sites under anodic polarization conditions, using the applied electrode potential as a probe to form catalytically active surface sites reminiscent of a SAC-like structure.
View Article and Find Full Text PDFA New TiO-Based Cathode Material with Interface-Dominated Storage Mechanism for Aqueous Zinc-Ion Batteries.
Small
December 2024
School of Material Science and Engineering, Jiangsu University, Zhenjiang, 212013, P. R. China.
Aqueous zinc-ion batteries (AZIBs) are highly desirable for large-scale energy storage applications, yet the lack of suitable cathode materials hinders their deployment. Here, for the first time, a new and promising TiO-based cathode material (TOC-AI) is reported for AZIBs and unveil a novel energy storage mechanism that enables Zn storage predominantly originating from the interface. The TOC-AI composed of ultrafine TiO nanocrystals embedded within an amorphous carbon matrix, featuring abundant atomic interfaces and strong interactions, triggers a decoupled and rapid transport of Zn ions and electrons in the interfacial space charge region, similar to an electrostatic capacitor.
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!