ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Xiaoli Peng,Hongmei Shen,Kai Su,Wenjie Wang,Shijie Weng,Chenxia Tang,Zhiyu Xue,Yong Xiang
Ternary nickel-rich layered oxide LiNi0.8Co0.1Mn0.1O2 (NCM811) is recognized as a cathode material with a promising future, attributed to its high energy density. However, the pulverization of cathode particles, structural collapse, and electrolyte decomposition are closely associated with the fragile cathode–electrolyte interphases (CEI), which seriously affect the electrochemical performances of ternary high-nickel materials. In this paper, fluorine- and nitrogen-containing methyl-2-nitro-4-(trifluoromethyl)benzoate (MNTB) was selected, which was synergistically regulated with fluoroethylene carbonate (FEC) to generate a robust CEI film. The preferential decomposition of MNTB/FEC results in the formation of an inorganic-rich (Li3N, LiF, and Li2O) CEI film with uniformly dense and stable characteristics, which is conducive to the migration of Li+ and the stability of the NCM811 structure and enhances the cycling stability of the battery system. Simultaneously, MNTB effectively suppresses the adverse reaction associated with increased polarization caused by higher interface impedance due to conventional single FEC additives, further improving the rate capability of the battery. Moreover, MNTB/FEC can effectively eliminate HF, preventing its corrosion on the NCM811 cathode. Under the synergistic effect of MNTB/FEC, after 300 discharge cycles at a high cutoff voltage of 4.3 V and a current density of 1 C (2 mA cm–2), the discharge capacity of the NCM811||Li battery was 150.12 mA h g–1 with a capacity retention of 81.10%, while it was only 32.8% for the standard electrolyte (STD). The discharged capacity of the MNTB/FEC-containing battery was about 115.43 mA h g–1 at the high rate of 7 C, which was considerably higher than that of the STD (93.34 mA h g–1). In this study, the designed MNTB as a novel solvent synergistically regulated with FEC will contribute to the enhanced stability of NCM811 materials at high cutoff voltages and at the same time provide an effective modified strategy to enhance the stability of commercial electrodes.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
PubMed
高影响因子
MOLECULES
·
2023
·Vol. 28
·期 12
·4731
·
IF 4.6
Ailing Li,Fuping Dong,Yuzhu Xiong
Nitrogen-rich porous organic polymers were fabricated through a nonreversible ring-opening reaction from polyamines and polyepoxides (PAEs). The epoxide groups reacted with both primary and secondary amines provided by the polyamines at different epoxide/amine ratios with polyethylene glycol as the solvent to form the porous materials. Fourier-transform infrared spectroscopy confirmed the occurrence of ring opening between the polyamines and polyepoxides. The porous structure of the materials was confirmed through N2adsorption–desorption data and scanning electron microscopy images. The polymers were found to possess both crystalline and noncrystalline structures, as evidenced by X-ray diffraction and high-resolution transmission electron microscopy (HR-TEM) results. The HR-TEM images revealed a thin, sheet-like layered structure with ordered orientations, and the lattice fringe spacing measured from these images was consistent with the interlayer of the PAEs. Additionally, the selected area electron diffraction pattern indicated that the PAEs contained a hexagonal crystal structure. The Pd catalyst was fabricated in situ onto the PAEs support by the NaBH₄ reduction of the Au precursor, and the size of the nano-Pd was about 6.9 nm. The high nitrogen content of the polymer backbone combined with Pd noble nanometals resulted in excellent catalytic performance in the reduction of 4-nitrophenol to 4-aminophenol.Keywords:porous organic polymer;amine–epoxy;ring opening;catalyst carrier
研究领域:
材料科学
·
催化化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
MICROCHEMICAL JOURNAL
·
2023
·
IF 4.8
Juntao Wang,Jiajia Liu,Weihua Liu,Ziwang Liu,Qiuhua Wu,Zhi Wang,Hongyuan Yan
A novel magnetic hyper crosslinked polymer (BTA-MHCP) was prepared by one-pot reaction of benzotriazole, 1,3,5-triphenylbenzene and phenyl-functionalized Fe 3 O 4 @SiO 2 . The BTA-MHCP was then investigated as the adsorbent for the rapid magnetic solid-phase extraction (MSPE) of the 5-nitroimidazoles (5-NDZs) including dimetridazole, metronidazole, secnidazole, ronidazole and ornidazole. The adsorbent showed good adsorption properties for the 5-NDZs. The key factors that affect the MSPE such as extraction time, the amount of sorbent, and the type of eluent and its volume were optimized. Under the optimal conditions, the linear response ranges for the established method were 0.15–100.0 ng mL −1 and 3.9–100.0 ng g −1 for drinking water and fish samples, respectively, with the coefficients of determination ( r 2 ) of 0.9981 to 0.9998. The limits of detection (S/N = 3) for the analytes were 0.02–0.05 ng mL −1 and 0.7–1.3 ng g −1 , and the method recoveries ranged from 92.0% to 101.0% and from 89.9% to 104.0% for drinking water and fish samples, respectively.
研究领域:
分析化学
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环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2020
·
IF 6.182
Kui Cui,Chao Wang,Yun Luo,Lin Li,Jing Gao,Wenyan Chen,Wenfan Xu,Yinhua Liu,Zhiyuan Ma,Xianfen Wang
Doping engineering is of great importance in adjusting the electronic conductivity, structural defects and energy storage performance of carbonaceous materials. Herein, a stepwise heteroatoms doping engineering is designed to modify cellulose-derived hierarchical porous carbons (HPC) with rich nitrogen (N@HPC) and subsequent boron (B@N@HPC). The effect of boron doping on nitrogen rich HPC is investigated to reveal the evolution of microstructures, porosity, surface area, and chemical groups. It is found that boron doping cannot further change the interlayer distance of nitrogen-rich HPC, but B@N@HPC exhibits excellent electrochemical performance as an anode in sodium ion batteries (SIBs). Compared with N@HPC, B@N@HPC anodes show a larger capacity of 308 mAh g −1 at 0.02 A g −1 , which is 137% larger than that of nitrogen doped HPC. Electrochemical Kinetics analysis through galvanostatic intermittent titration technique (GITT) and electrochemical impedance spectroscopy (EIS) suggests a capacitive-dominated process combined with a higher Na + diffusion coefficient and lower charge transfer resistance for the B@N@HPC than that of N@HPC. The effect of boron doping on the carbon anodes can be taken to explore an enhanced performance for SIBs.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2025
·
IF 11.3
Man He,Hui Zhu,Guoren Li,Tao Duan,Jiehong Lei
Radioactive iodine (I₂) and methyl iodine (CH₃I), as common and dangerous volatile fission products in nuclear waste streams, pose a serious threat to the environment and human health due to their long-term radioactivity. Here, we aim to achieve effective co-capture of I₂ and CH₃I through the synthesis of a nitrogen-rich porous organic polymer (CTP-BPA) based on triazine through the Schiff base reaction. Various characterizations have confirmed that the material has a rich mesoporous structure and nitrogen active sites. The material exhibits excellent performance under both static and dynamic conditions: it can achieve a high equilibrium capacity (4996.5 mg/g for I₂ and 621.5 mg/g for CH₃I gas), and more importantly, in dynamic penetration experiments, it has significant absorption capacity (1052.3 mg/g for I₂ and 377.8 mg/g for CH₃I) at low concentrations (3.83 ppm for I₂ and 3.39 ppm for CH₃I). Crucially, CTP-BPA can still maintain its capturing effect in simulated harsh environments, resisting strong acids (1 M HNO₃), high temperatures (up to 500°C), and high humidity (80 % relative humidity). Comprehensive experiments and DFT theoretical analysis indicate that the high-density nitrogen active sites effectively activate and fix iodine through strong charge transfer interactions, thereby achieving the chemical sequestration of harmful iodine substances. This research provides a promising strategy and advanced materials for the safe and long-term management of radioactive iodine in environmental remediation.
✓ 已验证
DOI
PubMed
高影响因子
ACS Omega
·
2025
·
IF 4.3
Qi Zhou,Lijiang Guan,Mohamed E. El-Khouly,Shangbin Jin
Porous organic polymers (POPs) with nitrogen-enriched structures are the type of materials with the advantages of porosity, excellent stability, and wide synthetic pathways, which possesses the great potential for application in the proton conduction. Herein, we report the synthesis of a novel type of pyrrole-based POPs that exhibit high surface areas and nitrogen-rich skeletons. The fabricated pyrrole-linked POPs render the high potential for the proton conducting application. In order to achieve precise modulation of the polymer structures, a benzothiadiazole moiety was introduced to increase the active site for forming strong hydrogen bonds with phosphoric acid. This modification allowed for precise manipulation of the monomers, which achieves a proton conductivity of 38.0 mS cm–1 at 180 °C. This work demonstrates a new type of nitrogen-rich POPs for proton conduction applications.
研究领域:
材料科学
·
高分子化学
·
能量存储与转换
·
固态离子学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ENERGY & FUELS
·
2024
·
IF 5.2
Wenhao Xi,Pan Wang,Tongchen Wu,Qianqian Hou,Bifen Gao,Yilin Chen,Peide Liu,Bizhou Lin
Porous transition metal-based nitrogen-doped carbon materials are considered promising bifunctional electrocatalysts for the oxygen reduction reaction/oxygen evolution reaction (ORR/OER) to improve the practical performance of rechargeable metal–air batteries. In this work, utilizing the sealing effect of a molten salt, defect-rich N-doped carbon supported embedded Co nanoparticles (NPs) with a unique two-dimensional/three-dimensional (2D/3D) cross-linked structure (Co@CLNC) was fabricated by a facile one-pot salt-assisted pyrolysis of a cobalt-based zeolite imidazole framework. Density functional theory (DFT) calculations revealed that the synergistic effect of Co NPs boosts the catalytic activity of Co–Nx active sites through reducing the energy barriers of the rate-determining steps, the desorption of *OH for the ORR and the transformation of *OH to *O for the OER. The as-prepared Co@CLNC manifests a larger specific surface area and remarkable OER/ORR bifunctional electrocatalytic activity with a high ORR half-wave potential of 0.84 V. A homemade Zn–air battery using Co@CLNC as the air electrode catalyst demonstrates excellent performance with a high open-circuit voltage of 1.526 V, a peak power density of 166 mW cm–2, and a high energy efficiency of greater than 59.8%, with a low charging voltage of less than 2 V during the 600-cycle stability test.
研究领域:
材料科学
·
能源科学
✓ 已验证
产品关联
DOI
高影响因子
Nano-Micro Letters
·
2021
·Vol. 13
·期 1
·1-20
·
IF 16.419
Cao Junming,Li Junzhi,Li Dongdong,Yuan Zeyu,Zhang Yuming,Shulga Valerii,Sun Ziqi,Han Wei
Combining with the advantages of two-dimensional (2D) nanomaterials, MXenes have shown great potential in next generation rechargeable batteries. Similar with other 2D materials, MXenes generally suffer severe self-agglomeration, low capacity, and unsatisfied durability, particularly for larger sodium/potassium ions, compromising their practical values. In this work, a novel ternary heterostructure self-assembled from transition metal selenides (MSe, M = Cu, Ni, and Co), MXene nanosheets and N-rich carbonaceous nanoribbons (CNRibs) with ultrafast ion transport properties is designed for sluggish sodium-ion (SIB) and potassium-ion (PIB) batteries. Benefiting from the diverse chemical characteristics, the positively charged MSe anchored onto the electronegative hydroxy (–OH) functionalized MXene surfaces through electrostatic adsorption, while the fungal-derived CNRibs bonded with the other side of MXene through amino bridging and hydrogen bonds. This unique MXene-based heterostructure prevents the restacking of 2D materials, increases the intrinsic conductivity, and most importantly, provides ultrafast interfacial ion transport pathways and extra surficial and interfacial storage sites, and thus, boosts the high-rate storage performances in SIB and PIB applications. Both the quantitatively kinetic analysis and the density functional theory (DFT) calculations revealed that the interfacial ion transport is several orders higher than that of the pristine MXenes, which delivered much enhanced Na + (536.3 mAh g −1 @ 0.1 A g −1 ) and K + (305.6 mAh g −1 @ 1.0 A g −1 ) storage capabilities and excellent long-term cycling stability. Therefore, this work provides new insights into 2D materials engineering and low-cost, but kinetically sluggish post-Li batteries.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
DOI
高影响因子
Nature Communications
·
2024
·Vol. 15
·期 1
·1-13
·
IF 14.7
Liang Mingxing,Ren Yifan,Cui Jun,Zhang Xiaochen,Xing Siyang,Lei Jingjing,He Mengyao,Xie Haijiao,Deng Libo,Yu Fei,Ma Jie
Carbon materials with defect-rich structure are highly demanded for various electrochemical scenes, but encountering a conflict with the deteriorative intrinsic conductivity. Herein, we build a highway-mediated nanoarchitecture that consists of the ordered pseudographitic nanodomains among disordered highly nitrogen-doped segments through a supramolecular self-assembly strategy. The “order-in-disorder” nanosheet-like carbon obtained at 800 °C (O/D NSLC-800) achieves a tradeoff with high defect degree (21.9 at% of doped nitrogen) and compensated electrical conductivity simultaneously. As expected, symmetrical O/D NSLC-800 electrodes exhibit superior capacitive deionization (CDI) performance, including brackish water desalination (≈82 mg NaCl g −1 at a cell voltage of 1.6 V in a 1000 mg L −1 NaCl solution) and reusage of actual refining circulating cooling water, outperforming most of the reported state-of-the-art CDI electrodes. The implanted pseudographitic nanodomains lower the resistance and activation energy of charge transfer, which motivates the synergy of hosting sites of multiple nitrogen configurations. Our findings shed light on electrically conductive nanoarchitecture design of defect-rich materials for advanced electrochemical applications based on molecular-level modulation.
研究领域:
材料科学
·
电化学
·
纳米技术
·
环境工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Advanced Energy Materials
·
2018
·Vol. 8
·期 30
·1802042
·
IF 21.875
Zheng Liu,Longhai Zhang,Lizhi Sheng,Qihang Zhou,Tong Wei,Jing Feng,Zhuangjun Fan
The development of stable electrode materials for sodium-ion batteries (NIBs) with excellent rate capacity, high volumetric/gravimetric capacity, and ultralong-term cycling stability still remains a challenge. Herein, a novel strategy for the synthesis of edge-nitrogen-rich carbon dots pillared graphene blocks (N-CDGB) through self-polymerization of aniline into graphene oxide blocks, and subsequent carbonization is developed. Due to high bulk density (1.5 g cm −3 ) and integrated lamellar structure with large edge-interlayer spacing (4.2 Å) pillared by nitrogen-doped carbon dots (95% edge-nitrogen content), the dense N-CDGB shows robust structural stability, fast ion/electron transfer pathways, and more active sites for sodium storage. As a result, the N-CDGB electrode exhibits ultrahigh reversible volumetric and gravimetric capacities (780 mAh cm −3 /520 mAh g −1 at 0.02 A g −1 ) far exceeding those of graphene (108 mAh cm −3 /290 mAh g −1 ) and hard carbon (297 mAh cm −3 /311 mAh g −1 ), excellent rate capability (118 mAh g −1 /177 mAh cm −3 at 10 A g −1 ), and superior cycling stability up to 10 000 cycles with almost no capacity loss at 10 A g −1 . This work signifies the superiority of densely pillared structure in the future development of NIBs with high volumetric/gravimetric capacity and ultralong-term cycling stability.
研究领域:
材料科学
·
储能
·
电化学
·
纳米材料
·
电池技术
✓ 已验证
DOI
高影响因子
JOURNAL OF POLYMER RESEARCH
·
2023
·Vol. 30
·期 11
·1-10
·
IF 2.8
Peng Lin-Ling,Zhou Wei-Fang,Chen Min,Li Li-Jun,Liu Yu,Zhou Cong-Shan,Xie Jun,Tang Ke-Wen
A novel disulfide functionalized nitrogen-rich covalent organic polymer (S-COP) directly synthesized by a solvothermal method were characterized by XRD, SEM, FT-IR, N 2 adsorption–desorption and XPS techniques. The as-synthesized polymer shows efficient adsorption performance for Au(III) from aqueous solution. The adsorption equilibrium of the adsorbent could be achieved within 5 h, and the as-synthesized S-COP exhibits an exceedingly high Au(III) uptake capacity of 1506 mg·g −1 . Furthermore, S-COP has satisfactory selectivity and reusability, which is a highlight of adsorption materials.
研究领域:
材料科学
·
环境化学
·
分析化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF THE ENERGY INSTITUTE
·
2023
·
IF 5.7
Shanjian Liu,Wenjing Zhao,Zhisen He,Mengqian Yin,Jingang Yao,Weiming Yi
Different volume ratios of carbon dioxide and nitrogen were mixed into the nitrogen-rich pyrolysis of cellulose , resulting in the production of nitrogen-doped biochar and nitrogen-containing bio-oil. When the urea mixture ratio was greater than 50%, the added CO 2 promoted the production of nitrogen-containing bio-oil, reaching a maximum of 26.03% ( M = 50%) at 10 vol% CO 2 + 90 vol% N 2 . Pyridine , pyrrole , and amines were the main nitrogen-containing compounds produced when using atmospheres of pure nitrogen and carbon dioxide. Upon increasing the volume ratio of CO 2 , the nitrile content increased significantly, becoming one of the main nitrogen-containing compounds. In addition, due to chemical stability, the thermal conversion of CO 2 demands a significant input of energy, so the required activation energy also increased. Adding CO 2 to simulate high-temperature anoxic flue gas is a promising method for biomass pyrolysis to obtain nitrogen containing chemicals with high added value and high nitrogen doped Biochar.
研究领域:
化学工程
·
环境科学
·
能源科学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）