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We synthesize porphyrin-based conjugated microporous polymers with dual active sites composed of metal-N4 conjugated macrocycle and conjugated carbonyl groups through the condensation polymerization, which could be served as anode materials to a full cell of lithium ion batteries. Download: Download high-res image (184KB)
We synthesize porphyrin-based conjugated microporous polymers with dual active sites composed of metal-N4 conjugated macrocycle and conjugated carbonyl groups through the condensation polymerization, which could be served as anode materials to a full cell of lithium ion batteries. Download: Download high-res image (184KB)
Thus far, research on silicon oxycarbide (SiOC, SiO n C 4-n (0 ≤ n ≤ 4)) as an anode material for lithium-ion batteries (LIBs) has been focused on the quantity and quality of …
1 · Electrocatalysts are extensively employed to suppress the shuttling effect in lithium-sulfur (Li-S) batteries. However, it remains challenging to probe the sulfur redox reactions and …
Cooperative Catalysis of Polysulfides in Lithium-Sulfur Batteries through Adsorption Competition by Tuning Cationic Geometric Configuration of Dual-active Sites in Spinel Oxides. Dr. Hongtai Li, Dr. Hongtai Li. Institute of Functional Nano & Soft Materials (FUNSOM), Soochow University, Suzhou, 215123 China . These authors contributed equally to …
Lei, D. et al. Facile synthesis of heterostructured MoS 2 –MoO 3 nanosheets with active electrocatalytic sites for high-performance lithium–sulfur batteries. ACS Nano 15, 20478–20488 (2021).
A meticulous insight into the lithium–sulfur catalytic reaction reveals that the conversion of LiPSs is dominated by active sites on the surfaces of catalytic materials. These microregions provide …
Lithium–sulfur (Li–S) batteries are promising candidates for next-generation energy storage systems owing to their high energy density and low cost. However, critical challenges including severe shuttling of lithium polysulfides (LiPSs) and sluggish redox kinetics limit the practical application of Li–S batteries. Carbon nitrides (CxNy), represented by …
Enhancing conversion of polysulfides via porous carbon nanofiber interlayer with dual-active sites for lithium-sulfur batteries Author links open overlay panel Chengbiao Wei a 1, Yulan Han b 1, Hao Liu a, Ruihui Gan a, Wenjun Ma a, Haihui Liu a, Yan Song c, Xiangwu Zhang d, Jingli Shi a, Chang Ma a
Thus far, research on silicon oxycarbide (SiOC, SiO n C 4-n (0 ≤ n ≤ 4)) as an anode material for lithium-ion batteries (LIBs) has been focused on the quantity and quality of the carbon domains. This study, however, intends to present a new perspective in order to maximize the utilization of active sites by forming nanovoids in the Si–O–C domain.
The paper reviews how to construct the active sites, how to characterize the active sites, and how the active sites impact the electrochemical performance of Li–S batteries. The ways to construct the active sites include increasing the specific surface area and …
Binary metal sulfides, particularly NiCo2S4, exhibit significant promise as anode materials for lithium-ion batteries due to their exceptional electrical conductivity and superior capacity compared to mono-metal sulfides and oxides. Herein, NiCo2S4/Carbon hollow spheres nanocomposites were successfully synthesized via high-temperature carbonization …
4 · Lithium-ion batteries (LIBs) have received strong attention for their wide range of applications in areas such as portable electronics, electric vehicles, and grid energy [1], [2], [3].However, the low theoretical specific capacity (372 mAh·g −1) [4] of the commercial graphite anode has forced a search for other alternative LIBs anode materials to achieve high …
Lithium-ion batteries have many advantages, but their safety depends on how they are manufactured, used, stored and recycled. Photograph: iStock/aerogondo. Fortunately, Lithium-ion battery failures are relatively rare, …
Aqueous zinc-ion batteries (AZIBs) have attracted much attention for owing to their environmental friendliness, low cost and high safety. Organic compounds have emerged as promising cathode materials for AZIBs due to their abundance of active sites, structural tunability and renewability.
Organic electrode materials play a crucial role in environmentally friendly and sustainable lithium-ion batteries (LIBs) due to their abundance, high theoretical capacity, inexpensiveness, and recyclability. However, critical issues such as fewer redox-active sites and poor structural stability limit their extensive application in LIBs. Herein, a unique covalent …
In order to cope with the global energy crisis and the greenhouse effect caused by carbon dioxide emissions, electrical energy storage systems play a crucial role in utilizing sustainable intermittent clean energy such as wind and solar energy effectively [1, 2].With the recent continuous development of lithium-ion batteries, the technology has been gradually improved, but limited …
Lithium–sulfur batteries (LSBs), recognized for their high energy density and cost-effectiveness, offer significant potential for advancement in energy storage. However, their widespread deployment remains hindered by challenges such as sluggish reaction kinetics and the shuttle effect of lithium polysulfides (LiPSs). By the introduction of catalytic materials, the effective …
A C 60 –S supramolecular complex with high-density active sites for the adsorption of lithium polysulfides (LiPSs) was synthesized as a cathode material for Li–S batteries by a simple one-step process. All C 60 molecules in the complex provide active sites to adsorb LiPSs (see picture). Under practical conditions with a high S loading and a low …
As a special class of crystalline porous polymers, covalent organic frameworks (COFs) containing electrochemical redox-active centers are attractive electrode materials for Li-ion batteries. However, designing and …
The development of the portable electronic products, electric vehicles, and grid energy storage systems continues to increase the demand for the high-performance lithium-ion batteries (LIBs) [1], [2], [3], [4].However, the scarcity of lithium resources, uneven geographical distribution, and high cost significantly restrict its application in a large-scale energy storage …
Aside from the elements'' toxicity, LIB-related dangers might also result from the following side effects: (a) Because of the less melting point of Li –metal (180 °C), molten lithium can develop when metal lithium batteries are overcharged, However, because metal lithium is substituted by lithiated carbon compounds in lithium-ion batteries, this is less likely to …
Through rational organization of two redox active building block, a triphenylamine-based metal–organic framework (MOF) material, Cu-TCA (H3TCA = tricarboxytriphenyl amine), was synthesized and applied as a cathode active material for the first time in lithium batteries. Cu-TCA exhibited redox activity both in the metal clusters …
Conjugated microporous polymers have been regarded as ideal electrode materials for green lithium-ion batteries (LIBs) considering their advantages such as insolubility, adjustable structure and porosity. Herein, we synthesize porphyrin-based CMPs (Co-PCMPs) with dual active sites composed of metal-N4 conjugated macrocycle and conjugated carbonyl …
Triphenylamine-Based Metal-Organic Frameworks as Cathode Materials in Lithium-Ion Batteries with Coexistence of Redox Active Sites, High Working Voltage, and High Rate Stability
Porphyrinic triazine frameworks (PTF) with abundant redox-active sites, permanent porosity, and stable π-conjugated skeleton have attracted great attention for lithium …
Lithium–oxygen battery with ultra-high theoretical energy density is considered a highly competitive next-generation energy storage device, but its practical application is severely hindered by issues such as difficult decomposition of discharge products at present. Here, we have developed N-doped carbon anchored atomically dispersed Ru sites …
The dual-active sites (N and D-TiO 2) enhance the interface conversion and chemisorption ability of LiPSs via forming "Li-N and Ti-S" bonds. Due to the structural advantage of the D-TiO 2 @NPCNF, the Li-S batteries exhibit excellent cycling stability (only 0.049% decay per cycle in 800cycles at 1.0C) and impressive specific capacity (608 mAh g −1 at 3.0C). This …
Different types of lithium batteries rely on unique active materials and chemical reactions to store energy. Each type of lithium battery has its benefits and drawbacks, along with its best-suited applications. The different lithium battery types get their names from their active materials. For example, the first type we will look at is the lithium iron phosphate battery, also …
The first rechargeable lithium battery was designed by Whittingham (Exxon) and consisted of a lithium-metal anode, a ... SEI also promotes longer cycle lifespans. 164 And the second involves developing composite materials composed of active lithium and inert materials that form a conductive buffer between the lithium source and the alloying materials. …
The active site construction includes the increasing surface area, inducing molecular and single-atom catalysts, inducing heteroatomic doping, vacancies, or functional group. The high specific …
DOI: 10.1016/j.jcis.2022.06.047 Corpus ID: 249695215; Enhancing conversion of polysulfides via porous carbon nanofiber interlayer with dual-active sites for lithium-sulfur batteries.
In this study, mesoporous N-doped carbon with atomically dispersed Zn-Nx active sites available on its surface, suitable for application as a cathode material for lithium-oxygen (Li-O2) batteries, is prepared via a MOF/biomass-based low-cost method. The porous structure and surface active sites of this material can be effectively tuned using a controlled …
A meticulous insight into the lithium–sulfur catalytic reaction reveals that the conversion of LiPSs is dominated by active sites on the surfaces of catalytic materials. These …
As shown previously, particles with smaller x 50 particle size (F1) correspond to higher specific surface area, which then provides more active site for the undesirable side reactions such as the SEI formation. 47 This eventually results in higher irreversible loss in lithium-ions and greater passivation of the active site. On the other hand, electrodes with …
Experimental and theoretical analyses revealed the reversibility of the lithium storage active sites in Mn-3D during cycling. This work highlights the significance of the design of redox-active metal–organic materials as high-performance anodes of lithium-ion batteries.
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