JOURNAL OF POWER SOURCES
·
2025
·
IF 7.9
Zhen Chen,Cheng Li,Yating Yu,Youzhi Xu,Minghua Chen
High reactivity between single-crystalline high-nickel LiNi x Co y Mn 1-x-y O 2 cathode materials (Ni-rich SC-NCM) and the electrolyte is considered to be the main cause of fast capacity decay. To prevent direct their direct contact, we utilized a wet coating process to uniformly coat the surface of SC-NCM811 with a layer of brominated phosphoric acid tri-p-cresyl ester (Br-TCP) approximately 6 nm in thickness. X-ray photoelectron spectroscopy analysis of a cycled SC-NCM811 electrode indicates that the Br-TCP coating layer not only plays a key role in reducing interfacial side reactions, but also generates LiBr, a Li-ion conductor, due to reactions with surface lithium sources. The presence of LiBr in the coating layer enhances the lithium-ion dynamics and reduces the impact of coating layer on the lithium-ion diffusion within SC-NCM811. Additionally, the strong ionic bonds of LiBr enable enhanced adhesion between Br-TCP coating layer and SC-NCM811, thereby achieving lasting protection effect. Consequently, the synergistic effects provided by the Br-TCP modification layer are beneficial to delivering excellent electrochemical performance. Specifically, the capacity retention ratio is improved from 8.95 % to 55.28 % over 400 cycles at 1 C. We believe the strategy developed herein can provide valuable guidance in designing advanced surface modified cathodes for high-performance lithium (-ion) batteries.
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产品关联
DOI
高影响因子
CARBON
·
2025
·
IF 11.6
Yue Liu,Zhongpan Zhang,Xiaoqiang Fan,Minhao Zhu
Covalent organic frameworks (COFs), as a well-known carbon-based material, exhibit multiple morphologies due to their controllable structure units. In this study, we proposed a molecular engineering approach utilizing the methoxy group to adjust the p -π resonance and synthesized two distinct covalent organic frameworks (COFs), designated as TATP (without methoxy) and TADM (with methoxy). These COFs exhibit significant morphological and structural disparities; TATP adopts a spherical morphology, whereas TADM forms layered structures with a high aspect ratio. The incorporation of TADM led to an excellent reduction in wear rates by 78.93 % compared to TATP (37.31 %). The exceptional interfacial lubrication performance of TADM is attributable to not only the successfully manipulated high-oriented layer structure through p -π resonance but also the formation of Fe–N bonds between the electron-rich nitrogen atoms in TADM and the electron-deficient iron atoms during the friction process.
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产品关联
DOI
高影响因子
ELECTROCHEMISTRY COMMUNICATIONS
·
2024
·
IF 4.7
Kewei Shu,Cunguo Yang,Huizhu Niu,Xiaorui Fuyan,Shuqi Yang,Haihua Wang
GeP 3 is a promising anode material for sodium ion battery due to better conductivity, relatively high theoretical capacity and improved mechanical endurance compared to phosphorus and other phosphides. However unsatisfied rate capability and cycling stability is still an annoying issue that hinders the application of GeP 3 . Here, GeP 3 was hybridized with P doped carbon (PPC) derived from low-cost coal tar pitch to prepare composite electrode. Through ball-milling process, the GeP 3 and PPC was homogenously mixed and form fused, secondary particles as confirmed by electron microscope. The formation of P-C and P-O-C bond between GeP 3 and carbon matrix was evidenced by XPS, and prompted by P doping level and O content in PPC. The electrochemical performance of the composite electrodes was evaluated, demonstrated much enhanced properties compared to bare GeP 3 and also GeP 3 /carbon black electrode. High reversible capacity of 781 mAh/g was achieved by GeP 3 /PPC-950 at 0.05 A/g. At higher current density of 2 A/g, the capacity can maintain at 360 mAh/g, 46% of the value that obtained at 0.05 A/g. The correlation between the structure of carbon and battery performance was discussed. The improvement in battery performance can be attributed to suppressed volume expansion and good conductive network of the GeP 3 /PPC composite, which affected by P doping level and O content of PPC.
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DOI
高影响因子
MICROCHEMICAL JOURNAL
·
2021
·
IF 4.821
Shaona Chen,Mengke Bu,Xinyu You,Zhongxu Dai,Jinjin Shi
We report a novel surface-enhanced Raman scattering (SERS) substrate for detecting p -nitroaniline (PNA) in real water samples, which possesses excellent sensitivity, good selectivity, and high SERS activity. Specifically, the uniform distribution structure of defect-graphene/Ag (DG/Ag) is obtained by acid etching graphene loading silver nanoparticles. The Molecularly imprinted polymer (MIP) film is copolymerized on the surface of DG/Ag by function monomer, crosslinker and template of PNA. A DG/Ag-MIP SERS substrate is obtained through polymerization of molecular imprinted polymer (MIP) on defect-graphene/Ag (DG/Ag) supporting materials . Our results signify that this new SERS substrate reveals excellent performance for PNA with an enhancement factor of 2.42 × 10 7 . Moreover, DG/Ag-MIP substrate exhibits outstanding capability to detect PNA molecules with detection limit approximately reaching 1.0 × 10 −14 M. These experimental results imply that the DG/Ag-MIP SERS substrate possesses potential application for sensing detection of PNA in environment.
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DOI
高影响因子
ACS Applied Materials & Interfaces
·
2023
·
IF 9.5
Tian Yu,Suiting Ning,Qian Liu,Tingting Zhang,Xiangbin Chen,Ning Qi,Xianli Su,Xinfeng Tang,Zhiquan Chen
As a liquid-like material, CuAgSe has high carrier mobility and ultralow lattice thermal conductivity. It undergoes an n–p conduction-type transition during β- to α-phase transition with increasing temperature. Moreover, optimization of the thermoelectric performance of CuAgSe is rather difficult, owing to the two-carrier conduction in this material. In this work, we reported the free tuning of the conduction type and thermoelectric performance of CuAgSe by manipulating the cation vacancies. Positron annihilation measurements reveal that the increase in CuAg content can effectively suppress the cation vacancies and reduce the hole carrier concentration, resulting in n-type conduction at high temperatures. Doping with Zn at the Cu sublattice in the CuAg-excessive CuAgSe can further decrease the number of vacancies, leading to a significant decrease in hole carrier concentration. Furthermore, the reduction of vacancies leads to weakening of carrier scattering. As a result, carrier mobility is also enhanced, thus improving the thermoelectric performance of n-type CuAgSe. On the other hand, high-performance p-type CuAgSe can be achieved by decreasing the CuAg content to introduce more cation vacancies. Ultimately, both n-type and p-type CuAgSe with superb thermoelectric performance are obtained, with a zTmax of 0.84 in Cu1.01Ag1.02Zn0.01Se (n-type) and 1.05 in (CuAg)0.96Se (p-type) at 600 K and average zT of 0.77 and 0.94 between 470 and 630 K for n-type and p-type, respectively.
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Shuo Wang,Guangshe Li,Taotao Huang,Chang Liu,Xinbo Li,Qian Zhang,Yongcun Zou,Liping Li
The interface of substances at high temperature is completely different from that at room temperature, which gives a chance to create some unprecedented physical and chemical properties. These interface-dominated properties can significantly improve the carrier transport kinetics. In this paper, we report on the synthesis of heterogeneous catalysts involving P doped g-C 3 N 4 and SnO 2 , providing a first example of using high temperature interfacial chemistry to create P-Sn bonds between thermo-soften two-dimensional substance and hard oxide. Nuclear magnetic resonance (NMR) and X-ray photoelectron spectroscopy (XPS) data confirmed the presence of P-Sn bonds in the heterogeneous catalysts of P doped g-C 3 N 4 and SnO 2 during the rapid thermal quenching process. Owing to the promoted fast separation of photogenerated carriers, P-Sn bond enriched catalyst exhibits the best Cr(VI) photoreduction performance among the g-C 3 N 4 -based photocatalysts ever reported. Even at high Cr(VI) concentrations (at 500 ppm), this catalyst retains a high catalytic activity as well as good stability. High temperature interface chemistry produced by thermal quenching process will provide a universal methodology for constructing interfacial bonds and guiding the synthesis of new interfacial functional materials.
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DOI
高影响因子
JOURNAL OF ELECTRONIC MATERIALS
·
2024
·Vol. 53
·期 6
·3089-3099
·
IF 2.2
Zhao Wenxia,Hui Kaihong,Zhao Wei,Chen Huaijun,Cui Yubo,Li Xinwei,Liu Xin,Song Yifan,Hui Kaining,Yan Yani,Qiao Liang,Wang Zenglin
The effects of additives on the deposition rate, surface morphology, Ni and P elemental content of the electroless plating layer, and roughness of the electroless plating Ni-P layer were investigated. In an electroless plating Ni-P system, ethylenediaminetetraacetic acid disodium salt (EDTA-2Na) and sodium hypophosphite monohydrate were used as the complexing agent and reductant, respectively. The linear sweep voltammetry (LSV) polarization curve results showed that the compound addition of 1.0 mg L −1 L-tyrosine, 2.0 g L −1 saccharin, and 6.0 mg L −1 sodium dodecyl sulfate (SDS) could inhibit sodium hypophosphite oxidation and nickel ion reduction, which eventually reduced the Ni-P deposition rate. The Tafel polarization curves indicated that the compound additives obviously improved the corrosion resistance of the Ni-P electroless plating layer. Field emission scanning electron microscopy (SEM) images showed that the composite additives generated fine and uniform Ni-P electroless plating particles and enhanced the density, eliminated the surface cracks, and reduced the pinholes on the electroless plating layer surface. Atomic force microscopy (AFM) tests showed that the addition of complex additives improved the smoothness of the plated layer, the R a value was reduced from 135.0 nm to 53.2 nm, and the R q value was reduced from 164.0 nm to 93.0 nm. The final composition and implementation conditions of the EDTA-2Na-based Ni-P electroless plating system were determined. The deposition rate was 10.44 μm h −1 , the P content of the electroless plating layer was 2.2%, and the electroless plating player was silver-white and bright. Graphical Abstract
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DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2022
·Vol. 139
·期 44
·e53070
·
IF 3.057
Yuanyu Ge,Zhenming Qi,Desheng Sha,Xiaosai Hu,Shiwen Liu
Intumescent flame retardant (IFR) is the new generation of environmentally friendly flame retardant. The improved water solubility of IFR enhances its application in cellulose-based textiles. A water-soluble carbon–nitrogen–phosphorus (C–N–P) ternary IFR (PTETP) was synthesized using cyanuric chloride (TCT), ethylene glycol (EG), and O-phosphoethanolamine (O-PEA) as starting materials. The burning performance of untreated and PTETP treated cotton fabrics was evaluated using vertical flammability test (VFT), limiting oxygen index (LOI), and cone calorimetry. The results indicate that with the increase of PTETP content, the flame retardant performance of cotton fabrics is gradually enhanced. The cotton fabric treated with 10 wt% PTETP shows no afterflame combustion, has a char length of 98 mm, and a LOI of 30.8%. Compared with pristine cotton fabric, the peak heat release rate (PHRR) and total heat release (THR) of the treated cotton fabric were reduced by 52.6% and 28.2%, respectively. Thermogravimetric (TG) shows that PTETP effectively improves the thermal stability and reduces the thermal decomposition temperature of cotton fabric, and even can increases the residual carbon rate by 20%. In addition, the employment of PTETP shows no harm on the tensile strength of cotton fabrics. After washing 20 times, LOI of flame-retardant cotton fabric still remained almost 26%.
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DOI
高影响因子
TRIBOLOGY INTERNATIONAL
·
2022
·
IF 5.62
Shangtao Huang,Binbin Wang,Xueyang Zhao,Shuangjian Li,Xiangchao Liang,Rong Zeng,Wei Li,Xiaojian Wang
With a similar structure as natural cartilage, hydrogels show great potential in repairing cartilage defect. However, achieving high strength and excellent lubrication is still a significant challenge for hydrogels. Herein, we synthesized a series of P(AAm-co-AAc)/Fe 3+ /hydrogenated soy phosphatidylcholine (HSPC) composite hydrogels with high strength and low friction coefficient. By tuning the concentration of Fe 3+ and HSPC, the compressive strength of the composite hydrogels can reach 59.09 MPa, which is higher than that of most current existing hydrogels. Owing to the boundary lubrication and strengthening effect of HSPC, the friction coefficient of the composite hydrogel can be reduced from 0.48 to 0.06. The combination of high compressive strength and low friction under high load makes the hydrogels promising candidates for cartilage defect treatment.
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DOI
高影响因子
iScience
·
2021
·
IF 5.458
Wanying Du,Xionghui Jia,Zhixuan Cheng,Wanjing Xu,Yanping Li,Lun Dai
Two-dimensional (2D) semi-conductive transition metal dichalcogenides (TMDCs) have shown advantages for logic application. Complementary metal-oxide-semiconductor (CMOS) inverter is an important component in integrated circuits in view of low power consumption. So far, the performance of the reported TMDCs-based CMOS inverters is not satisfactory. Besides, most of the inverters were made of mechanically exfoliated materials, which hinders their reproducible production and large-scale integration in practical application. In this study, we demonstrate a practical approach to fabricate CMOS inverter arrays using large-area p -MoTe 2 and n -MoS 2 , which are grown via chemical vapor deposition method. The current characteristics of the channel materials are balanced by atomic layer depositing Al 2 O 3 . Complete logic swing and clear dynamic switching behavior are observed in the inverters. Especially, ultra-low power consumption of ∼0.37 nW is achieved. Our work paves the way for the application of 2D TMDCs materials in large-scale low-power-consumption logic circuits.
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DOI
PubMed
高影响因子
MACROMOLECULAR CHEMISTRY AND PHYSICS
·
2021
·Vol. 222
·期 10
·2000418
·
IF 2.527
Haoting Zheng,Kun Wu,Weilong Chen,Bingfei Nan,Zhencai Qu,Mangeng Lu
A series of copolymers of poly3-alkylthiophene (PTm) with different side chain lengths and copolymers of 3-butylthiophene and 3-butoxythiophene (PTDx) with different ratios are synthesized by oxidative polymerization. As the length of the side chain decreases, WAXD patterns of PTm show an increase in crystallinity. An increment of 50% in thermal conductivity is observed and the maximum thermal conductivity reaches to 0.320 Wm –1 K –1 . For PTDx, as the proportion of 3-butoxythiophene increases, the UV spectrum appears red-shifted, indicating an enhanced degree of p-π conjugation. The thermal conductivity of PTDx is increased from 0.340 to 0.374 Wm –1 K –1 , which is around twice that of traditional thermoplastics. Molecular dynamics (MD) is used to simulate the changes in the volume and dihedral angle overlap of the polymer at different temperatures, and achieves the same result as the experiment. MD simulations and experimental measurements have shown that reducing steric hindrance and enhancing p-π conjugation can increase the thermal conductivity of the polymer. Young's modulus of PTDx (around 1.86 GPa) is lower than that of conventional plastics, and its flexibility makes it more versatile.
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DOI
高影响因子
Molecular Catalysis
·
2024
·
IF 3.9
Shijie Wang,Shenghan Zhang,Zhenye Zhang,Xinliang Guo,Yu Tan,Kexin Liang,Xijun Wang
Liquid organic hydrogen carrier (LOHC) has been recognized as a highly promising candidate for hydrogen storage materials in addressing hydrogen utilization issues. However, the hydrogenation and dehydrogenation of LOHC typically require noble metal catalysts and harsh reaction conditions. In this paper, we proposed an efficient reversible electrochemical hydrogen storage system based on a nitrogen heterocyclic organic hydrogen carrier, quinoxaline , in which water was used as the solvent and hydrogen source for quinoxaline hydrogenation, and a self-supporting dendritic P-WO 3 /NF electrode was employed as the electrocatalyst. The catalytic properties of P-WO 3 /NF for electrochemical hydrogenation of quinoxaline and dehydrogenation of 1,2,3,4-tetrahydroquinoxaline were studied in 1 M KOH solution under mild conditions. The results showed that the hydrogenation conversion of quinoxaline was 90%, the selectivity was 99%, and the dehydrogenation conversion of 1,2,3,4-tetrahydroquinoxaline was 100%, the selectivity was 100%. This indicates that the system has high conversion efficiency, outstanding selectivity, and good reversibility. Meanwhile, the P-WO 3 /NF electrode adapted to the system exhibited good catalytic stability. In addition, no pre-prepared external hydrogen was required in the electrochemical hydrogenation reaction involving water, which gave the system an excellent safety profile. The reversible electrochemical hydrogen storage system established by this work broadens the vision of LOHC in hydrogen storage applications.
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DOI
高影响因子
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