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学者姓名:李洪义
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Abstract :
Most reported 3D electrodes currently lack a macroscopically ordered porous structure, hindering transport efficiency optimization and reducing the utilization of active materials and the surface area of the electrodes. In this study, a micro- and macroscopic hierarchical porous titanium alloy electrode modified with Pt nanoparticles (Pt/TNTs@3D-TC4) was created using electron beam melting (EBM) technology, anodic oxidation, and a water bath method. The micrometer-scale network structure enhanced electrolyte diffusion and bubble removal, whereas the surface nanostructures provided numerous anchoring sites for Pt nanoparticles. This unique micro- nano structure offers a large specific surface area and efficient mass transport, resulting in excellent acidic HER performance and stability at industrial current densities. X-ray photoelectron spectroscopy (XPS) and X-ray adsorption fine structure (XAFS) analyses confirmed an electronic metal-support interaction (EMSI) between Pt and TiO2 nanotubes (TNTs), with Pt nanoparticles anchored via Pt-O-Ti bonds. The electrode achieved the overpotential of 42 mV at-10 mA cm- 2, and 267 and 378 mV at-0.5 A cm- 2 and 1 A cm- 2, respectively. Exceptional stability was demonstrated, without significant deactivation after 120 h at 0.5 A cm- 2. This study offers a novel strategy in the industrial application of high-performance electrodes for electrochemical energy conversion.
Keyword :
High current density High current density Self-supporting Self-supporting 3D Printing 3D Printing Hierarchical porous Hierarchical porous Hydrogen evolution reaction Hydrogen evolution reaction
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GB/T 7714 | Song, Hui , Ran, Guangshun , Xu, Jiangwen et al. Pt nanoparticles decorated 3D printed hierarchical porous titanium alloy scaffolds for hydrogen evolution reactions at amper-level current densities [J]. | JOURNAL OF ALLOYS AND COMPOUNDS , 2025 , 1016 . |
MLA | Song, Hui et al. "Pt nanoparticles decorated 3D printed hierarchical porous titanium alloy scaffolds for hydrogen evolution reactions at amper-level current densities" . | JOURNAL OF ALLOYS AND COMPOUNDS 1016 (2025) . |
APA | Song, Hui , Ran, Guangshun , Xu, Jiangwen , Lin, Chunxia , Yang, Zicong , Chang, Yukun et al. Pt nanoparticles decorated 3D printed hierarchical porous titanium alloy scaffolds for hydrogen evolution reactions at amper-level current densities . | JOURNAL OF ALLOYS AND COMPOUNDS , 2025 , 1016 . |
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Abstract :
Cycling lifespan/stability is one of the most important limitations for multivalent transition metal sulfides (TMSs) used in secondary batteries. However, the chaos reaction of TMSs is an important obstacle that restricts their electrochemical stability in all-enclosed batteries. Herein, taking FeS anode and lithium-ion batteries as the example, the phase-lithiation correlation is studied through TEM and DFT analysis. It's found that the pristine hexagonal FeS converts to tetragonal FeS phase accompanied by severe and rapid capacity decay. However, it converts to orthorhombic FeS with enhanced capacity and nice lifespan when introducing trace amount amorphous Al2O3 upon FeS power's surface. DFT calculations further reveal that Al2O3 induces the phase conversion from low-acitve tetragonal FeS to high-active orthorhombic FeS, which promotes the lithiation-delithiation reversibility and stability. Based on the above result, it is expected to provide useful guidelines for the in-situ structure engineering of TMSs-based anodes in all-enclosed secondary batteries.
Keyword :
Enhanced capacity Enhanced capacity Al2O3 Al2O3 Orthorhombic FeS Orthorhombic FeS Chaos reaction Chaos reaction Hexagonal FeS Hexagonal FeS
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GB/T 7714 | Zu, Guannan , Li, Yilong , Liu, Hexiong et al. Al2O3-induced phase conversion regulation from hexagonal FeS to orthorhombic FeS for enhancing the Li-ion accommodation ability [J]. | MATERIALS CHARACTERIZATION , 2024 , 217 . |
MLA | Zu, Guannan et al. "Al2O3-induced phase conversion regulation from hexagonal FeS to orthorhombic FeS for enhancing the Li-ion accommodation ability" . | MATERIALS CHARACTERIZATION 217 (2024) . |
APA | Zu, Guannan , Li, Yilong , Liu, Hexiong , Zhang, Manchen , Yang, Yunfei , Wang, Juan et al. Al2O3-induced phase conversion regulation from hexagonal FeS to orthorhombic FeS for enhancing the Li-ion accommodation ability . | MATERIALS CHARACTERIZATION , 2024 , 217 . |
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Conventionally, rocking-chair batteries capacity primarily depends on cation shuttling. However, intrinsically high-charge-density metal-ions, such as Al3+, inevitably cause strong Coulombic ion-lattice interactions, resulting in low practical energy density and inferior long-term stability towards rechargeable aluminium batteries (RABs). Herein, we introduce tunable quantum confinement effects and tailor a family of anion/cation co-(de)intercalation superlattice cathodes, achieving high-voltage anion charge compensation, with extra-capacity, in RABs. The optimized superlattice cathode with adjustable van der Waals not only enables facile traditional cation (de)intercalation, but also activates O2- compensation with an extra anion reaction. Furthermore, the constructed cathode delivers high energy-density (466 Wh kg-1 at 107 W kg-1) and one of the best cycle stability (225 mAh g-1 over 3000 cycles at 2.0 A g-1) in RABs. Overall, the anion-involving redox mechanism overcomes the bottlenecks of conventional electrodes, thereby heralding a promising advance in energy-storage-systems. Here, the authors propose a superlattice cathode with co-(de)intercalation chemistry in a rechargeable aluminum ion battery. The proposed cathode exceeds the theoretical capacity for conventional oxide electrodes with single cation shuttling.
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GB/T 7714 | Cui, Fangyan , Li, Jingzhen , Lai, Chen et al. Superlattice cathodes endow cation and anion co-intercalation for high-energy-density aluminium batteries [J]. | NATURE COMMUNICATIONS , 2024 , 15 (1) . |
MLA | Cui, Fangyan et al. "Superlattice cathodes endow cation and anion co-intercalation for high-energy-density aluminium batteries" . | NATURE COMMUNICATIONS 15 . 1 (2024) . |
APA | Cui, Fangyan , Li, Jingzhen , Lai, Chen , Li, Changzhan , Sun, Chunhao , Du, Kai et al. Superlattice cathodes endow cation and anion co-intercalation for high-energy-density aluminium batteries . | NATURE COMMUNICATIONS , 2024 , 15 (1) . |
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Highly active, stable, economic friendly electrocatalysts play a crucial role for the commercialization of direct methanol fuel cells (DMFCs). One kind of flower-like PtNi bimetallic particle anchored on TiO2 na-notube arrays (PtNi/TNTs/Ti) had been synthesized by one-step electrochemical synthesis as anode catalysts for methanol oxidation reaction (MOR) in this study. The PtNi/TNTs/Ti electrode demonstrated high elec-trocatalytic activity and durability significantly for MOR. In addition, PtNi100/TNTs/Ti possessed a mass activity of 409.8 mA/mgpt, which was four times greater than that of Pt100/TNTs/Ti electrodes. According to further structure analysis, the improvement in catalytic activity was attributed to lattice compression when Ni atoms entered the Pt lattice accompanied by a 1.02 eV positive shift in Pt 4 f7/2 binding energy, and density functional theory (DFT) calculations indicated that the remarkably enhanced catalytic performance on PtNi through lattice compression arising from the enhanced OH adsorption. It appears promising that this simple method could be adopted to prepare an integrated electrode used as energy and environmental applications. (c) 2023 Published by Elsevier B.V.
Keyword :
TiO2 nanotubes TiO2 nanotubes PtNi bimetallic catalyst PtNi bimetallic catalyst Methanol oxidation reaction Methanol oxidation reaction Lattice compression Lattice compression
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GB/T 7714 | Chang, Yukun , Chen, Yanhui , Wu, Yahang et al. One-step synthesis of PtNi anchored on TiO2 nanotube arrays for methanol oxidation [J]. | JOURNAL OF ALLOYS AND COMPOUNDS , 2023 , 943 . |
MLA | Chang, Yukun et al. "One-step synthesis of PtNi anchored on TiO2 nanotube arrays for methanol oxidation" . | JOURNAL OF ALLOYS AND COMPOUNDS 943 (2023) . |
APA | Chang, Yukun , Chen, Yanhui , Wu, Yahang , Yang, Zicong , Wang, Jinshu , Wang, Xinxin et al. One-step synthesis of PtNi anchored on TiO2 nanotube arrays for methanol oxidation . | JOURNAL OF ALLOYS AND COMPOUNDS , 2023 , 943 . |
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Abstract :
Here, Pt modified anatase-type titanium dioxide (TiO2) nanotube arrays were prepared by electroplating method for a low-platinum Pt/TiO2 nanotubes electrode (Pt/TiO2-NTs). By contrast, we fixed Pt on TiO2 dense film by the same procedure as a control sample (Pt/TiO2-F). The scanning electron microscopy and transmission electron microscopy observation showed that Pt nanoparticles were distributed uniformly in nanotube arrays, and Pt/TiO2 NTs showed a higher efficiency in electrocatalytic hydrogen evolution compared with Pt/TiO2-F and commercial Pt/C catalyst, in which the overpotential of Pt/TiO2-NTs was 0.079 V, the Tafel slope was 42.7 mV.dec(-1) at 10 mA.cm(-2). The catalytic activity of 3 000 cycles duration stability test results showed that Pt/TiO2-NTs exhibited excellent stability compared with the above contrast electrodes.
Keyword :
TiO2 nanotubes carrier TiO2 nanotubes carrier electroplating electroplating electrocatalytic hydrogen evolution electrocatalytic hydrogen evolution platinum-based catalyst platinum-based catalyst
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GB/T 7714 | Wu An-Ran , Chen Yan-Hui , Wang Xin-Xin et al. Pt/TiO2 Nanotubes Electrode: Preparation by Electroplating Method and Electrocatalytic Hydrogen Evolution Performance [J]. | CHINESE JOURNAL OF INORGANIC CHEMISTRY , 2022 , 38 (2) : 227-236 . |
MLA | Wu An-Ran et al. "Pt/TiO2 Nanotubes Electrode: Preparation by Electroplating Method and Electrocatalytic Hydrogen Evolution Performance" . | CHINESE JOURNAL OF INORGANIC CHEMISTRY 38 . 2 (2022) : 227-236 . |
APA | Wu An-Ran , Chen Yan-Hui , Wang Xin-Xin , Zhou Wen-Yuan , He Jia-Wei , Wang Jin-Shu et al. Pt/TiO2 Nanotubes Electrode: Preparation by Electroplating Method and Electrocatalytic Hydrogen Evolution Performance . | CHINESE JOURNAL OF INORGANIC CHEMISTRY , 2022 , 38 (2) , 227-236 . |
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Abstract :
2H phase molybdenum disulfide (2H-MoS2) possesses the two-dimensional layered structure and high theoretical capacity, presenting excellent lithiation-delithiation property. However, the violent capacity decay within dozens of cycles still remains a great challenge due to lacking of in-depth failure mechanism. Herein, a novel decay-recovery-decay failure phenomenon upon long-term cycles is reported for the first time, which originates from the slow size change of Mo nanoparticles (NPs). Decay stages are triggered by many irregular-shaped Mo NPs with the increasing size up to similar to 15 nm, leading to prominent pseudocapacitance failure and capacity loss. Subsequent recovery stages are attributed to the pulverization of coarse Mo NPs through surface sulfurization and accompanying lithiation. To overcome the instability issue, proper modifiers should be introduced to restrain the spontaneous growth of Mo NPs, such as aluminum oxide (Al2O3). The strong Mo-Al2O3 bond gradually "drags" Al2O3 fragments into the active material as the cycle continuously proceeds, resulting in the efficient refinement and the reversible conversion between Mo and MoS2. Therefore, the enhanced cycling stability and the capacity retention are successfully achieved. It is expected to provide a new insight into the energy storage of transition metal chalcogenide anode materials in rechargeable batteries. (C) 2022 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology.
Keyword :
Al2O3 Al2O3 Mo nanoparticles Mo nanoparticles Decay-recovery-decay Decay-recovery-decay 2H-MoS2 2H-MoS2 Enhanced cycling stability Enhanced cycling stability
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GB/T 7714 | Zu, Guannan , Xu, Shiyu , Wang, Changhao et al. Unraveling structure evolution failure mechanism in MoS2 anode for improving lithium storage stability [J]. | JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY , 2022 , 128 : 245-253 . |
MLA | Zu, Guannan et al. "Unraveling structure evolution failure mechanism in MoS2 anode for improving lithium storage stability" . | JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY 128 (2022) : 245-253 . |
APA | Zu, Guannan , Xu, Shiyu , Wang, Changhao , Li, Hongyi , Zhang, Manchen , Ke, Xiaoxing et al. Unraveling structure evolution failure mechanism in MoS2 anode for improving lithium storage stability . | JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY , 2022 , 128 , 245-253 . |
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Abstract :
采用阳极氧化法制备得到锐钛矿型二氧化钛(TiO_2)纳米管阵列,在其表面通过电镀法沉积Pt,得到了低铂的Pt/TiO_2纳米管电极(Pt/TiO_2-NTs)。通过扫描电子显微镜和透射电子显微镜对其进行形貌表征后发现,Pt较为均匀地分布于TiO_2纳米管阵列中。进一步的电催化析氢结果表明,Pb/TiO_2-NTs在10 m A·cm~(-2)时,过电位为0.079 V,塔菲尔斜率为42.7 m V·dec~(-1),较Pt/TiO_2致密膜电极(Pt/TiO_2-F)以及商业Pt/C催化剂显示了更为优异的催化活性。同时,在长循环稳定性测试(3 000个周期)中,Pb/TiO_2-NTs相较于上...
Keyword :
TiO_2纳米管载体 TiO_2纳米管载体 电镀 电镀 铂基催化剂 铂基催化剂 电催化析氢 电催化析氢
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GB/T 7714 | 吴安冉 , 陈言慧 , 王心心 et al. 电镀法制备Pt/TiO_2纳米管电极及其电催化析氢性能 [J]. | 无机化学学报 , 2022 , 38 (02) : 227-236 . |
MLA | 吴安冉 et al. "电镀法制备Pt/TiO_2纳米管电极及其电催化析氢性能" . | 无机化学学报 38 . 02 (2022) : 227-236 . |
APA | 吴安冉 , 陈言慧 , 王心心 , 周文元 , 何佳伟 , 王金淑 et al. 电镀法制备Pt/TiO_2纳米管电极及其电催化析氢性能 . | 无机化学学报 , 2022 , 38 (02) , 227-236 . |
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Abstract :
二氧化钛纳米管属于一维纳米材料,既具有纳米材料普遍具有的量子尺寸效应,还具有独特的机械性、热稳定性和光学性质,因此其具有特殊的研究意义。采用简单易操作的阳极氧化法可在钛基底上制备出结构致密、形貌可控、与钛基底结合紧密的纳米管阵列。相比二氧化钛的纳米颗粒和纳米薄膜等材料,高度有序且表面积大的TiO_2纳米管可以为电子和离子提供更快速的运输通道。基于阳极氧化法和磁控溅射及电化学沉积法,探究了TiO_2纳米管在锂电池、电催化、光催化以及钛合金紧固件等领域的相关应用。
Keyword :
阳极氧化 阳极氧化 电化学沉积 电化学沉积 磁控溅射 磁控溅射 二氧化钛纳米管 二氧化钛纳米管
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GB/T 7714 | 李洪义 , 陈言慧 , 郑雄领 et al. 二氧化钛纳米管的制备和应用 [J]. | 金属功能材料 , 2022 , 29 (05) : 1-9 . |
MLA | 李洪义 et al. "二氧化钛纳米管的制备和应用" . | 金属功能材料 29 . 05 (2022) : 1-9 . |
APA | 李洪义 , 陈言慧 , 郑雄领 , 祖冠男 , 常玉昆 , 吴亚航 . 二氧化钛纳米管的制备和应用 . | 金属功能材料 , 2022 , 29 (05) , 1-9 . |
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Abstract :
Wearable flexible devices require advanced lithium-ion batteries (LIBs) for energy supply, thus promotes the development of self-assembled, binder-free, film-type anodes with the advantage of no additives, strong binding force and low contact resistance. Among many potential candidates, 2H phase molybdenum disulfide (2H-MoS2) has been attracting much attention due to its high practical capacity and graphene-like structure. However, few interests are paid to the compactness design inside the in-situ grown MoS2 film on bendable matrices, leading to poor structure stability and low volumetric capacity. Herein, film compactness is carefully modulated by controlling the sputtering parameters, then the cross-section microstructure and electrochemical property are systematically investigated. Among them, the dendritic-arranged, middle porosity MoS2 (MP-MoS2) offers abundant Li-ion migration channels, delivering an enhanced charge-discharge capacity of 1136 and 1157 mAh center dot g(-1) (similar to 3.7 Ah.cm(-3)) after 300 cycles at 1C. MP-MoS2 (2 h) with the same structure and increased mass loading can also stably operate for 400 cycles without decay. Notably, it remains stable cycling on titanium and stainless-steel matrices, but the sharp decay often occurs within tens of cycles towards common copper foil due to Cu diffusion and film orientation alteration, implying that low-melting-point flexible matrices are not suitable for in-situ 2H-MoS2 assembling at high temperature. This work provides a practical analyzation strategy for designing film-type 2H-MoS2 anode material used as flexible LIBs.
Keyword :
lithium-ion batteries lithium-ion batteries Stable cycling Stable cycling Compactness design Compactness design Film-type anodes Film-type anodes 2H phase molybdenum disulfide 2H phase molybdenum disulfide
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GB/T 7714 | Zu, Guannan , Yang, Yunfei , Li, Hongyi et al. The compactness of 2H-MoS2 thin films determines their performance on lithium storage ability [J]. | MATERIALS CHARACTERIZATION , 2022 , 196 . |
MLA | Zu, Guannan et al. "The compactness of 2H-MoS2 thin films determines their performance on lithium storage ability" . | MATERIALS CHARACTERIZATION 196 (2022) . |
APA | Zu, Guannan , Yang, Yunfei , Li, Hongyi , Wang, Juan , Fu, Yonghong , Wang, Xinxin et al. The compactness of 2H-MoS2 thin films determines their performance on lithium storage ability . | MATERIALS CHARACTERIZATION , 2022 , 196 . |
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Abstract :
一种电化学氮还原用硼掺杂二氧化钛纳米管阵列固载二硫化钼的制备方法,属于电催化技术领域。首先利用阳极氧化法制备硼掺杂的二氧化钛纳米管结构作为磁控溅射基体材料;利用磁控溅射的射频溅射功能将二硫化钼溅射到硼掺杂的二氧化钛纳米管阵列上以形成一定形状结构的二硫化钼薄膜;将结构进行裁剪、封装步骤加工为测试电极;使用反应室容量为50ml的H形电解池于密封条件下在0.1mol/L的盐酸中测试电极的电催化氮还原性能。催化效果和循环性能比较好。
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GB/T 7714 | 李洪义 , 许世宇 , 王心心 et al. 一种电化学氮还原用硼掺杂二氧化钛纳米管阵列固载二硫化钼的制备方法 : CN202210154479.9[P]. | 2022-02-18 . |
MLA | 李洪义 et al. "一种电化学氮还原用硼掺杂二氧化钛纳米管阵列固载二硫化钼的制备方法" : CN202210154479.9. | 2022-02-18 . |
APA | 李洪义 , 许世宇 , 王心心 , 周文元 , 陈言慧 , 常玉昆 et al. 一种电化学氮还原用硼掺杂二氧化钛纳米管阵列固载二硫化钼的制备方法 : CN202210154479.9. | 2022-02-18 . |
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