APPLIED SURFACE SCIENCE
·
2023
·
IF 6.7
Hao Chen,Jingdong Guo,Shandong Tan,Xueqi Zhang,Zhiyuan Sang,De'an Yang
MnO 2 has outstanding potential for application in cathode materials of zinc ion batteries (ZIBs). However, the poor electrical conductivity , poor ion diffusion kinetics, and structural instability greatly limit its rate performance, specific capacity, and cycling stability. Herein, we prepared PEDOT-coated MnO 2 cathode material with oxygen vacancy defects, namely Vö-MnO 2 @PEDOT, by Dual-modification of MnO 2 nanowires. The PEDOT coating optimizes the electron transfer capability of the material while inhibiting the dissolution of MnO 2 . The oxygen vacancies accelerate ion diffusion. Vö-MnO 2 @PEDOT possesses a joint energy storage mechanism, containing the insertion/extraction of H + /Zn 2+ and dissolution/precipitation of MnO 2 . This joint energy storage mechanism explains the high specific capacity and the increase in capacity. The Vö-MnO 2 @PEDOT displays a high specific capacity of 400 mAh/g at 0.2 A/g. Besides, at 2 A/g, Vö-MnO 2 @PEDOT outputs a high capacity of 213 mAh/g after 2000 cycles. This research provides a feasible research idea for the performance optimization of manganese oxide cathode materials.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
INDUSTRIAL CROPS AND PRODUCTS
·
2025
·
IF 6.2
Ming Yang,Han Gao,Hongtao Zou,Di Sun
The preparation of biobased coated controlled-release fertilizers by bio-derived materials was crucial for green and sustainable development in agricultural production. Yet, considerable endeavors were still urgently needed to be devoted to improving the unwanted flaws of biobased materials, i.e. high hydrophilicity and abundant micro-pores. Herein, single- and dual-modified coated fertilizers were successfully developed based on all-biobased coating materials. The characteristics of the unmodified and modified coated fertilizers were also compared. The results indicated that the outermost layer modification by lauric acid copper improved the hydrophobicity and swelling capacity of the all-biobased membrane, prolonging nitrogen release period by 53 days. The water contact angle of dual modified fertilizer by siloxane and nano lauric acid cooper attained 105° and its swelling volume was relatively larger, which contributed to a longer nitrogen release longevity (112 days). Therefore, the dual modification showed more efficiency in improving the controlled-release ability and simultaneously simplified the preparation technology. Besides, compared to the single modification, this strategy decreased the nanomaterial dose and then lowered the potential environmental risk of long-term use of nanomaterial. The novel modification technique and dual-modified all biomembrane material could provide guidance for the future development of renewable and environmentally friendly coated fertilizers.
研究领域:
农业科学
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材料科学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
Batteries-Basel
·
2024
·Vol. 10
·期 8
·272
·
IF 4.6
Mingfeng Tan,Helei Wei,Qi Li,Zhipeng Yu,Qiang Zhang,Mingzhi Lin,Bo Lin
A novel composite consisting of fluorine-doped carbon and graphene double-coated LiMn0.6Fe0.4PO4(LMFP) nanorods was synthesized via a facile low-temperature solvothermal method that employs a hybrid glucose and polyvinylidene fluoride as carbon and fluorine sources. As revealed by physicochemical characterization, F-doped carbon coating and graphene form a ‘point-to-surface’ conductive network, facilitating rapid electron transport and mitigating electrochemical polarization. Furthermore, the uniform thickness of the F-doped carbon coating alters the growth of nanoparticles and prevents direct contact between the material and the electrolyte, thereby enhancing structural stability. The strongly electronegative F−can inhibit the structural changes in LMFP during charge/discharge, thus reducing the Jahn–Teller effect of Mn3+. The distinctive architecture of the LMFP/C-F/G cathode material exhibits excellent electrochemical properties, exhibiting an initial discharge capacity of 163.1 mAh g−1at 0.1 C and a constant Coulombic efficiency of 99.7% over 100 cycles. Notably, the LMFP/C-F/G cathode material achieves an impressive energy density of 607.6 Wh kg−1, surpassing that of commercial counterparts. Moreover, it delivers a reversible capacity of 90.3 mAh g−1at a high current rate of 5 C. The high-capacity capability and energy density of the prepared materials give them great potential for use in next-generation lithium-ion batteries.
研究领域:
材料科学
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电化学
✓ 已验证
产品关联
DOI
高影响因子
Catalysts
·
2023
·Vol. 13
·期 7
·1064
·
IF 3.9
Yutong Ye,Guorong Zhou,Kaixun Li,Yun Tong
Anion modification and trace metal doping have been widely demonstrated to have unique advantages in regulating both electrocatalytic activity and the electronic structure of non-precious metal materials. Developing a simple and practical preparation strategy is critical, but it still faces challenges. In this paper, a novel type of dual-modification approach is put forward to rationally design the S, Pt-CoNi material, which can be grown directly on the nickel foam (NF) in a one-step electrodeposition process. The multiple advantages of having plenty of active sites, high conductivity, and a faster charge transfer endow the optimized reaction kinetic for HER. The prepared S, Pt-CoNi/NF catalyst displays excellent catalytic performance, and a low overpotential of 116 mV at 50 mA cm−2and a small Tafel slope of 75 mV dec−1are achieved. The coupled S, Pt-CoNi/NF||FeOOH/NF electrolyzer delivers a high current density of 100 mA cm−2at the potential of 1.61 V as well as superior stability under alkaline conditions. Our work experimentally confirms the feasibility of constructing a dual-regulation strategy via one-step electrodeposition, and it also provides ideas for the controllable design of other high-performance electrodes for electrocatalysis.Keywords:dual-modification;CoNi alloy;electrodeposition;electrocatalytic hydrogen production;alkaline medium
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
POLYMER DEGRADATION AND STABILITY
·
2019
·
IF 3.78
Wenzong Xu,Xiaoling Wang,Xiongjie Wu,Wu Li,Chuanming Cheng
Fire safety is very important in the application of epoxy resin (EP). To study the effect of fire safety, a new kind of double-modified graphene (F-RGO-CuMoO 4 ) was synthesized in this work. Firstly, GO was modified with 3-Triethoxysilylpropylamine (KH550) through the amidation reaction between the amino and carboxyl group to obtain organic functionalized graphene F-RGO. Subsequently, CuMoO 4 was introduced onto the surface of F-RGO by the electrostatic interaction . Then the prepared F-RGO-CuMoO 4 was added into EP to prepare an EP composite. The TEM test results of the EP/F-RGO-CuMoO 4 ultrathin section showed that F-RGO-CuMoO 4 was well dispersed in EP, indicating that the dispersion of graphene in EP was obviously improved after double modification. In addition, F-RGO-CuMoO 4 also effectively improved the fire safety of EP. Specifically, the total heat release (THR), peak heat release rate (PHRR), total smoke production (TSP) and smoke production rate (SPR) values of the EP/F-RGO-CuMoO 4 composite were reduced to 33.4 MJ/m 2 , 504 kW/m 2 , 24.5 m 2 and 0.27 m 2 /s, which were 43.7%, 59.9%, 62.3% and 66.7% lower than those of pure EP, respectively. The main fire safety mechanism of F-RGO-CuMoO 4 was explored according to the char residue analysis.
研究领域:
材料科学
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火灾安全工程
✓ 已验证
产品关联
DOI
高影响因子
PROGRESS IN ORGANIC COATINGS
·
2024
·
IF 6.5
Chuanjin Lin,Guoquan Suo,Rongrong Mu,Jiarong Li,Laraib Habib,Xiaojiang Hou,Shukai Ding,Jianfeng Zhu
Water-induced degradation threatens sandstone cultural relics, highlighting the need for effective protection. This study applies a nano-coating of PFDTS-modified TiO 2 /SiO 2 to sandstone, optimizing PFDTS concentration, coating penetration depth, and hydrophobicity. A TiO 2 -to-SiO 2 ratio of 75:25 with 80 μL of PFDTS achieved high water and oil contact angles of 152.7° and 145.7°, respectively. After 210 h of UV exposure, contact angles showed minimal reduction, confirming the coating's durability. Additionally, air permeability is preserved to maintain sandstone breathability. These findings provide valuable insights for safeguarding sandstone heritage sites against weathering.
研究领域:
材料科学
·
文物保护
·
纳米技术
✓ 已验证
DOI
高影响因子
ACS Sustainable Chemistry & Engineering
·
2021
·
IF 8.198
Yun Tong,Dongmei Feng,Pengzuo Chen
Developing highly efficient electrocatalysts for large-scale implementation of the hydrogen evolution reaction (HER) at a large current density is critical for renewable H2 fuel. The designed electrocatalysts by non-noble metals are expected to operate well at wide pH conditions, but it remains a major challenge. In this work, a novel dual modification strategy is applied to develop a series of P/Mo modified Ni3S2 on nickel foam (denoted as P-MNS/NF) as pH-universal electrocatalysts for HER. Benefiting from the plentiful catalytic active sites, optimized electronic structure, and improved reaction kinetics, the P-MNS/NF electrode realizes remarkable catalytic activity and stability at a large current density. The optimal P3-MNS3/NF catalyst exhibits the low overpotential of 245 and 243 mV at a high current density of 1 A cm–2 for both alkaline/acidic media. Those are promising performance results compared to those of the other nickel sulfide-based materials. Importantly, this P3-MNS3/NF can also achieve good performance in a neutral electrolyte. This needs a small overpotential of 360 mV to reach the current density of 0.5 A cm–2. Our strategy provides a new method to guide rational design of highly active HER electrocatalysts over a wide pH window.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
Advanced Materials Interfaces
·
2021
·Vol. 9
·期 2
·2101564
·
IF 6.147
Feng Wang,Shuaibo Qin,Botao Zhu,Peng Jin,Jiahao Cai,Yunpeng He,Hailin Cong,Lai Feng
Graphite carbons have been widely used as catalyst support due to their low-cost, tunable porous structure, high electrical conductivity, and good resistance to harsh conditions. To date, various defect engineerings have been adopted to enhance the cohesion between graphite carbons and metallic nanocatalysts. Nevertheless, the modification of carbon basal plane has been less explored. In this work, a dual modification strategy is developed to achieve novel carbon support (denoted as NC f ) incorporating both C 60 units and trace N-defects. Benefiting from the dual anchoring modes (Ru–C and Ru–N–C), ultrafine ruthenium (Ru) nanoclusters (average size: 2.26 ± 0.38 nm) can be well-dispersed and robustly anchored on the NC f support. The optimal Ru 0.013 @NC f catalyst exhibits decent catalytic activities and long-term stabilities toward both alkaline hydrogen evolution reaction (HER) and aromatic nitroreduction (ANR), outperforming the individually modified counterparts. Computational studies suggest that introducing both C 60 and N-defects into carbon support leads to electron-deficient Ru nanocluster, which is critical for not only HER but also ANR. This work thus provides a new guideline for rational design of advanced carbon supported nanocatalysts for multipurpose applications.
研究领域:
催化化学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2021
·
IF 9.229
Zhi Li,Shuang Cao,Xin Xie,Chao Wu,Heng Li,Baobao Chang,Gairong Chen,Xiaowei Guo,Xiaoyan Zhang,Xianyou Wang
Low Coulombic efficiency, severe capacity fading and voltage attenuation, and poor rate performance are currently great obstacles for the industrial application of lithium-rich manganese-based cathode materials (LRMCs) in lithium-ion batteries (LIBs). Herein, a dual modification strategy combining defect designing with interface engineering is reported to solve the above problems synchronously. Oxygen vacancies, a carbon nitride protective layer, and a fast ion conductor are simultaneously introduced in the LRMCs. It has been found that oxygen vacancies can suppress the release of irreversible oxygen, which is in favor of improving the initial Coulombic efficiency, the carbon nitride protective layer can improve the structural stability and alleviate the attenuation of capacity and voltage, and the fast ion conductor can promote the diffusion rate of Li+ and electron conductivity and thus enhance the rate capability. The modified material exhibits significantly enhanced electrochemical performances, including a favorable capacity retention rate of 94.2% over 120 cycles at 1C (1C = 200 mAh g–1) and excellent rate capabilities of 173.1 and 136.9 mAh g–1 can be maintained at 5 and 10C after 100 cycles, respectively. Hence, the well-designed dual modification strategy with defect design and interface engineering provides significant exploration for the development and industrialization of LRMCs with high performance.
研究领域:
材料科学
·
电化学
·
能源存储技术
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Junbo Yang,Zhu Ma,Wei You,Yi Chen,Zhuowei Du,Shenshen Zheng,Qiang Yang,Hao Du,Qian Zhang,Yixian Li,Fuchun Gou,Bo Chen,Zhuo Lv,Kai Liu,Hong Yu,Yan Xiang,Cheng Huang,Jian Yu,Fengying Zhang,Wenfeng Zhang,Kuan Sun,Liming Ding
Recent progress in inverted perovskite solar cells (IPSCs) mainly focused on NiOx modification and perovskite (PVK) regulation to enhance efficiency and stability. However, most works address only monofunctional modifications, and identical molecules with the ability to simultaneously optimize NiOx interface and perovskite bulk phase have been rarely reported. This work proposes a dual modification approach using 4-amino-3,5-dichlorobenzotrifluoride (DCTM) to optimize both NiOx upper interfaces and reduction of bulk defects in perovskite. Amino group in DCTM increases the Ni3+/Ni2+ ratio in NiOx, thereby increasing the conductivity and optimizing the energy alignment. Additionally, DCTM fills Pb2+ and I– vacancies in perovskite, which improves the vertical orientation of perovskite grains and subsequently reduces nonradiative recombination, thereby achieving the increased carrier lifetime. PVK modified by DCTM exhibits enhanced energy level alignment with the electron transport layer, while femtosecond transient absorption (TA) spectroscopy confirms that DCTM facilitates efficient carrier transport, leading to high-performance IPSCs. The optimized IPSCs achieve a maximum efficiency of 22.8% with a reduced hysteresis (0.7%). Moreover, the unencapsulated device preserves over 80% of its initial power conversion efficiency (PCE) after 1000 h stored in air at 30% relative humidity. This dual modification strategy of monomolecular offers a straightforward solution for interface optimization and provides new insights into selecting aniline-derived molecules for high-performance IPSCs.
研究领域:
材料科学
·
能源技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2023
·
IF 9.5
Guojie Chen,Haocheng Ji,Hui Fang,Jingjun Zhai,Zhewen Ma,Wenhai Ji,Yinchao Wang,Yuxiang Huang,Lele Liu,Wenxin Tong,Wen Zeng,Yinguo Xiao
Sodium-ion batteries (SIBs) have garnered extensive attentions in recent years as a low-cost alternative to lithium-ion batteries. However, achieving both high capacity and long cyclability in cathode materials remains a challenge for SIB commercialization. P3-type Na0.67Ni0.33Mn0.67O2 cathodes exhibit high capacity and prominent Na+ diffusion kinetics but suffer from serious capacity decay and structural deterioration due to stress accumulation and phase transformations upon cycling. In this work, a dual modification strategy with both morphology control and element doping is applied to modify the structure and optimize the properties of the P3-type Na0.67Ni0.33Mn0.67O2 cathode. The modified Na0.67Ni0.26Cu0.07Mn0.67O2 layered cathode with hollow porous microrod structure exhibits an excellent reversible capacity of 167.5 mAh g–1 at 150 mA g–1 and maintains a capacity above 95 mAh g–1 after 300 cycles at 750 mA g–1. For one thing, the specific morphology shortens the Na+ diffusion pathway and releases stress during cycling, leading to excellent rate performance and high cyclability. For another, Cu doping at the Ni site reduces the Na+ diffusion energy barrier and mitigates unfavorable phase transitions. This work demonstrates that the electrochemical performance of P3-type cathodes can be significantly improved by applying a dual modification strategy, resulting in reduced stress accumulation and optimized Na+ migration behavior for high-performance SIBs.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
PubMed
高影响因子
Nano Energy
·
2023
·
IF 17.6
Zijun Yi,Bo Xiao,Xin Li,Yubo Luo,Qinghui Jiang,Junyou Yang
The carrier non-radiative recombination loss caused by numerous interfacial defects existing between perovskite and neighboring charge transport layers, such as SnO 2 /perovskite and perovskite/spiro-OMeTAD, which greatly restricts the performance improvement of flexible perovskite solar cells (PSCs). Herein, we devised a novel dual-modification strategy using Ce-containing compounds (Ce 2 (SO 4 ) 3 and Ce(SO 4 ) 2 ) to minimize interfacial defect density at the interface of SnO 2 /perovskite and perovskite/spiro-OMeTAD respectively, thus enhancing the performance and stability of flexible PSCs. It was revealed that the introduction of Ce 2 (SO 4 ) 3 interface layer was conducive to ameliorating the electrical properties of SnO 2 and significantly reducing the SnO 2 /perovskite interface defects. Moreover, the Ce(SO 4 ) 2 was adopted as a novel oxidant to achieve the rapid oxidation of spiro-OMeTAD, thus enhancing the hole mobility of bulk spiro-OMeTAD and suppressing perovskite/spiro-OMeTAD interface defects. Therefore, reduced non-radiative recombination losses near the two interfaces of the perovskite layer could be achieved by such a novel and comprehensive modification strategy. In consequence, the Ce-modified flexible and rigid PSCs achieved excellent photoelectric conversion efficiency (PCE) of 19.34 % and 22.62 %, respectively. Notably, the optimized flexible PSCs exhibited outstanding mechanical durability, and 83.2 % of the initial PCE was maintained after 3000 bending cycles.
研究领域:
材料科学
·
能源科学
·
化学工程
✓ 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）