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学者姓名：宋晓平
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Abstract ：
Magnetization reversal has attracted more and more interests due to its applications on spintronic devise and magnetic storage materials. However, the magnetization reversal is rarely studied in the non-rare earth intermetallic compounds. In this work, we have found that the Ni20Mn3B6 alloy exhibits the magnetization reversal phenomenon with the decreasing temperature at low applied fields (H <= 100 Oe), accompanying with two compensation temperatures. Further analysis showed that the first compensation temperatures is due to the competition between the two different interactions of Mn atoms that occupy two different positions. The second one is arising from the rotating of the moment on demand of Zeeman energy. Based on this phenomenon, a tunable bipolar switching of magnetization between positive and negative value has been found in the alloy between two compensation temperatures, which can be applied in the spintronic devices and magnetic storage materials. (C) 2021 Elsevier B.V. All rights reserved.
Keyword ：
Magnetic properties Magnetization reversal Magnetization switching NiMnB alloys
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| GB/T 7714 | Zhao, Qizhong , Tian, Fanghua , Chang, Tieyan et al. Magnetization reversal and tunable bipolar magnetization switching in Ni20Mn3B6 alloy [J]. | JOURNAL OF ALLOYS AND COMPOUNDS , 2021 , 886 . |
| MLA | Zhao, Qizhong et al. "Magnetization reversal and tunable bipolar magnetization switching in Ni20Mn3B6 alloy" . | JOURNAL OF ALLOYS AND COMPOUNDS 886 (2021) . |
| APA | Zhao, Qizhong , Tian, Fanghua , Chang, Tieyan , Cao, Kaiyan , Wang, Dingchen , Zhang, Yin et al. Magnetization reversal and tunable bipolar magnetization switching in Ni20Mn3B6 alloy . | JOURNAL OF ALLOYS AND COMPOUNDS , 2021 , 886 . |
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Abstract ：
A giant exchange bias (EB) of 9600 Oe was observed in polycrystalline Fe3O4/CoO layers at 10 K after 20 kOe field cooling, and was attributed to the strong exchange coupling formed by the interfacial spins between the polycrystalline Fe3O4and the CoO layer. It was found that at 10 K, the magnetic-moment difference (ΔM) between the zero field cooling curves and field cooling curves first increases and then decreases with the change of the field, and it reaches the maximum value at a field of 20 kOe, which suggests that the interfacial spins can be tuned by the cooling field. Furthermore, other magnetic properties, including field dependence, temperature dependence, and training effects, were investigated, which further confirmed that the interfacial spins play an important role in the EB effect. This work provides a method to tune the magnitude of the EB effect and reveals the mechanism of the dependency of EB on interfacial spins, which could guide the design of giant-EB-effect materials. © the Owner Societies 2021.
Keyword ：
Cobalt compounds Cooling Iron oxides Magnetic field effects Magnetic moments Magnetite Phase diagrams Temperature distribution
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| GB/T 7714 | Tian, Fanghua , Li, Yebei , Zhao, Qizhong et al. Giant exchange bias inducedviatuning interfacial spins in polycrystalline Fe3O4/CoO bilayers [J]. | Physical Chemistry Chemical Physics , 2021 , 23 (8) : 4805-4810 . |
| MLA | Tian, Fanghua et al. "Giant exchange bias inducedviatuning interfacial spins in polycrystalline Fe3O4/CoO bilayers" . | Physical Chemistry Chemical Physics 23 . 8 (2021) : 4805-4810 . |
| APA | Tian, Fanghua , Li, Yebei , Zhao, Qizhong , Cao, Kaiyan , Wang, Dingchen , Dai, Zhiyong et al. Giant exchange bias inducedviatuning interfacial spins in polycrystalline Fe3O4/CoO bilayers . | Physical Chemistry Chemical Physics , 2021 , 23 (8) , 4805-4810 . |
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Abstract ：
Aqueous rechargeable lithium-ion batteries (ARLBs) are considered to be promising alternatives to traditional Li+-ion batteries. Since the advent of the development of ARLB technology, vanadium oxide has been widely used as an anode material because of its great potential. However, several key flaws require urgent attention, for example, low-rate performance and meager cyclic stability. In this paper, a strategy is proposed to augment the interlayer spacing of the vanadium-oxide structure to boost its electrochemical performance. This work aims at exploiting vanadium oxide by modifying its interlayer spacing by introducing a NH4+ molecule to achieve the pillar effect and the as-prepared NH4V4O10, which exhibits a higher interlayer spacing of 9.8 angstrom. The increased interlayer spacing allows more Li+ to accommodate in the host material and to facilitate their migration. The NH4V4O10 coupled with a commercial LiMn2O4 cathode is able to deliver a capacity of 61.5 mAhg(-1) at a current density of 3 Ag-1 in saturated aqueous LiNO3 electrolyte. The decent cyclic capacity retention of 69.5% is attained for NHVO//LiNO3//LiMn2O4 following 300 cycles of deep charge-discharge at 3 Ag-1. On the basis of the communal findings, the incorporation of NH4+ molecules into the interlayer spacing offers great promise as a high-performance anode for ARLBs.
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| GB/T 7714 | Lashari, Najeeb Ur Rehman , Zhao, Mingshu , Zheng, Qingyang et al. Enhanced Rate Capability and Cycling Stability of Novel Ammonium Vanadate Materials Used in Aqueous Li-Ion Batteries [J]. | ENERGY & FUELS , 2021 , 35 (5) : 4570-4576 . |
| MLA | Lashari, Najeeb Ur Rehman et al. "Enhanced Rate Capability and Cycling Stability of Novel Ammonium Vanadate Materials Used in Aqueous Li-Ion Batteries" . | ENERGY & FUELS 35 . 5 (2021) : 4570-4576 . |
| APA | Lashari, Najeeb Ur Rehman , Zhao, Mingshu , Zheng, Qingyang , He, Xinhai , Ahmed, Irfan , Su, Zhou et al. Enhanced Rate Capability and Cycling Stability of Novel Ammonium Vanadate Materials Used in Aqueous Li-Ion Batteries . | ENERGY & FUELS , 2021 , 35 (5) , 4570-4576 . |
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Abstract ：
Physical hydrogels, composed of non-covalently crosslinking three dimensional polymer networks and a large amount of water, have drawn much attention due to their excellent mechanical properties such as high toughness, self-healing, self-recovery, and shape-memory. But the fatigue behaviors of physical hydrogels, especially the role of non-covalent bonds in the fatigue process, have not been well studied. Here we study fatigue damage and fatigue fracture of two kinds of physical hydrogels based on hydrogen bonding (H-bonding): poly(vinyl alcohol)/poly(acrylic acid) (PVA/PAA) gels with weak H-bonding (weak gels) and PVA/PAA-LiCl gels with strong H-bonding (strong gels). For the fatigue damage of uncut samples, both the weak and strong gels are fatigue strengthened in small deformation by stretch-induced H-bonding rearrangement, but are fatigue damaged in large deformation by chain sliding. For the fatigue fracture of precut samples, both the weak and strong gels show no measurable fatigue threshold, but the strong gel can mitigate crack growth. These results reveal the intrinsically weak non-covalent bonds cannot effectively increase the fatigue resistance of physical hydrogels. This work provides a deep perspective for developing novel anti-fatigue hydrogels. (C) 2021 Elsevier Ltd. All rights reserved.
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| GB/T 7714 | Zhao, Xueqi , Wu, Jingping , Zhou, Yifan et al. Fatigue behaviors of physical hydrogels based on hydrogen bonds [J]. | EXTREME MECHANICS LETTERS , 2021 , 46 . |
| MLA | Zhao, Xueqi et al. "Fatigue behaviors of physical hydrogels based on hydrogen bonds" . | EXTREME MECHANICS LETTERS 46 (2021) . |
| APA | Zhao, Xueqi , Wu, Jingping , Zhou, Yifan , Pan, Yudong , Lu, Tongqing , Song, Xiaoping et al. Fatigue behaviors of physical hydrogels based on hydrogen bonds . | EXTREME MECHANICS LETTERS , 2021 , 46 . |
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Abstract ：
SnO2@Carbon (SnO2@C) nanowires were prepared using the method electrospinning. After the heat treatment of the SnCl2/polyvinypyrrolidone nanofibers, SnO2 nanoparticles (~20 nm) were uniformly embedded and distributed on the surface of carbon nanowires. The SnO2@C manifested a strong synergistic effect that originated from its wrapped nanoarchitecture, which was proved to be highly conductive with small volume change. This SnO2@C nanowires shown high reversible capacity and excellent cycling performance of 680 mAh g−1 at 100 mA g−1 after 50 cycles. © 2020 Elsevier B.V.
Keyword ：
Chlorine compounds Heat treatment Lithium-ion batteries Nanowires
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| GB/T 7714 | Tian, Fanghua , Cheng, Yangqin , Zhang, Yanjun et al. SnO2@C nanowires as high-performance anodic materials for lithium-ion batteries [J]. | Materials Letters , 2021 , 284 . |
| MLA | Tian, Fanghua et al. "SnO2@C nanowires as high-performance anodic materials for lithium-ion batteries" . | Materials Letters 284 (2021) . |
| APA | Tian, Fanghua , Cheng, Yangqin , Zhang, Yanjun , Zhao, Qizhong , Shi, Qian , Zhang, Yin et al. SnO2@C nanowires as high-performance anodic materials for lithium-ion batteries . | Materials Letters , 2021 , 284 . |
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Abstract ：
SnO2 is one of the classic high-capacity anode candidates for lithium-ion batteries (LIBs). However, its practical application is limited by its low electrical conductivity and inferior cycling performance, where the poor cycle performance is mainly caused by large volume changes during the charging/discharging process. In this work, unique thermally reshaped polyvinylpyrrolidone/SnO2@p-toluenesulfonic acid-doped poly-pyrrole (T-PVP/SnO2@D-PPy) nanocables have been prepared by a combination of electrospinning and chemical synthesis. The T-PVP/SnO2@D-PPy nanocables have a wrapped nanoarchitecture providing a strong synergistic effect, which results in high conductivity and small volume changes during the charging/discharging processes. The T-PVP/SnO2@D-PPy nanocables could deliver a high reversible capacity of 858.2 mAh g(-1) after 200 cycles at a current density of 100 mA g(-1), indicating the outstanding electrochemical performance. This work provides an elegant method to improve the electrochemical performance of SnO2-based anodes for next-generation lithium-ion batteries and energy storage systems. (C) 2021 Elsevier B.V. All rights reserved.
Keyword ：
Lithium-ion battery Nanocables Polypyrrole Polyvinylpyrrolidone SnO2
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| GB/T 7714 | Tian, Fanghua , Zhang, Yanjun , Liu, Li et al. Thermally reshaped polyvinylpyrrolidone/SnO2@p-toluenesulfonic acid-doped polypyrrole nanocables with high capacity and excellent cycle performance as anode for lithium-ion batteries [J]. | JOURNAL OF ALLOYS AND COMPOUNDS , 2021 , 867 . |
| MLA | Tian, Fanghua et al. "Thermally reshaped polyvinylpyrrolidone/SnO2@p-toluenesulfonic acid-doped polypyrrole nanocables with high capacity and excellent cycle performance as anode for lithium-ion batteries" . | JOURNAL OF ALLOYS AND COMPOUNDS 867 (2021) . |
| APA | Tian, Fanghua , Zhang, Yanjun , Liu, Li , Shi, Qian , Li, Jianing , Zhao, Qizhong et al. Thermally reshaped polyvinylpyrrolidone/SnO2@p-toluenesulfonic acid-doped polypyrrole nanocables with high capacity and excellent cycle performance as anode for lithium-ion batteries . | JOURNAL OF ALLOYS AND COMPOUNDS , 2021 , 867 . |
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Abstract ：
An interesting evolution of spin glass behaviors and the corresponding exchange bias effects were observed by quenching Ni50Mn42In3Sb5 Heusler alloys at different temperatures. When the alloy is quenched at 1173 K, it will freeze from antiferromagnetic to spin glass at low temperature under an external magnetic field, creating a giant exchange bias field up to 9063 Oe through the pinning effect. In another case, the superparamagnetic in alloys quenched at 473 K will transform to superspin glass after zero-field cooling at low temperatures instead. As a result, a spontaneous exchange bias effect up to 581 Oe can be achieved.
Keyword ：
exchange bias Heusler alloys spin glass superparamagnetic thermal treatment
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| GB/T 7714 | Cao, Kaiyan , Tian, Fanghua , Huang, Shuo et al. Tuning the exchange bias effect via thermal treatment temperature in bulk Ni50Mn42In3Sb5 Heusler alloys [J]. | APPLIED PHYSICS EXPRESS , 2021 , 14 (10) . |
| MLA | Cao, Kaiyan et al. "Tuning the exchange bias effect via thermal treatment temperature in bulk Ni50Mn42In3Sb5 Heusler alloys" . | APPLIED PHYSICS EXPRESS 14 . 10 (2021) . |
| APA | Cao, Kaiyan , Tian, Fanghua , Huang, Shuo , Zhang, Yin , Zhao, Qizhong , Yao, Kangkang et al. Tuning the exchange bias effect via thermal treatment temperature in bulk Ni50Mn42In3Sb5 Heusler alloys . | APPLIED PHYSICS EXPRESS , 2021 , 14 (10) . |
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Abstract ：
Soft magnetic metallic materials are the key components in generators, motors and transformers. The Curie temperatures of currently used soft magnetic metallic materials limit their applications in high-temperature environments. In this work, we tuned the bcc/fcc ratio through modifying the Co content, thus obtaining near-zero magnetostriction and improved soft magnetic properties in the magnetostrictive system Fe100-xCox (70≤x≤93) alloys with high Curie temperature. With the increase of Co content, we observed the evolution of three crystal structures from bcc to fcc and three types of magnetostriction curves, ∧-type, ∨-type and M-type, which can be well interpreted by the domain-switching model. The optimum composition Fe20Co80, corresponding to the coexistence of bcc & fcc phases, exhibits magnetostriction of -3 ppm, a coercive field of 0.18 kA/m and saturated magnetization of 183 Am2kg−1. Our study provides an effective route to design magnetic functional materials with zero magnetostriction. © 2021 Acta Materialia Inc.
Keyword ：
Binary alloys Cobalt Cobalt alloys Crystal structure Curie temperature Functional materials High temperature applications Iron alloys Magnetostriction Magnetostrictive devices
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| GB/T 7714 | Zhang, Rui , Zhou, Chao , Chen, Kaiyun et al. Near-zero magnetostriction in magnetostrictive FeCo alloys [J]. | Scripta Materialia , 2021 , 203 . |
| MLA | Zhang, Rui et al. "Near-zero magnetostriction in magnetostrictive FeCo alloys" . | Scripta Materialia 203 (2021) . |
| APA | Zhang, Rui , Zhou, Chao , Chen, Kaiyun , Cao, Kaiyan , Zhang, Yin , Tian, Fanghua et al. Near-zero magnetostriction in magnetostrictive FeCo alloys . | Scripta Materialia , 2021 , 203 . |
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Abstract ：
1T-MoS2 is currently under intensive research, because it is a thermodynamically metastable metallic phase with a super electronic conductivity. However, the instability and finite specific capability of 1T-MoS2 hinder its application in batteries. Herein, 1T-MoS2 grown on hollow carbon fiber backbones and coated by a layer of carbon through N-S bond is synthesized by a simple hydrothermal method. N-S bond on the carbon expands the interplanar spacing of 1T-MoS2, which can accommodate more Li+ and improve electronic conductivity. Besides, the carbon coating of 1T-MoS2 grown on hollow carbon fiber backbones is a strong chemical coupling between 1T-MoS2 and the outer carbon matrix by N-S bond, providing a good stable structure on cycling. As a anode material for lithium-ion batteries, the obtained C@MoS2@C nanotubes showed a super capacity (737 mAh g(-1)) at high current density (2 A g(-1)) with long-life cycling (1200 cycles). (C) 2020 Elsevier B.V. All rights reserved.
Keyword ：
Chemical coupling C@MoS2@C nanotubes Lithium ion batteries N-S bond Structural stability
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| GB/T 7714 | Zong, Jingui , Wang, Fei , Zhao, Jiangping et al. Rational design of strong chemical coupling carbon coated N-doped C@MoS2@C nanotubes for high-performance lithium storage [J]. | JOURNAL OF ALLOYS AND COMPOUNDS , 2021 , 861 . |
| MLA | Zong, Jingui et al. "Rational design of strong chemical coupling carbon coated N-doped C@MoS2@C nanotubes for high-performance lithium storage" . | JOURNAL OF ALLOYS AND COMPOUNDS 861 (2021) . |
| APA | Zong, Jingui , Wang, Fei , Zhao, Jiangping , Fan, Xing , Zhao, Mingshu , Yang, Sen et al. Rational design of strong chemical coupling carbon coated N-doped C@MoS2@C nanotubes for high-performance lithium storage . | JOURNAL OF ALLOYS AND COMPOUNDS , 2021 , 861 . |
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Abstract ：
Aqueous alkali metal ion batteries show great promise as the next generation secondary batteries with low cost, high power density and better safety. However, they suffer from inferior cycle stability at a higher current density and displays poor coulombic efficiency. In this work, LiTi2(PO4)3@C/CNTs (LTP@C/CNTs) with three-dimensional mesoporous nanostructure was investigated in both aqueous lithium-ion batteries (ALIBs) and aqueous sodium-ion battery (ASIBs). Improved rate and cycling performance at high current densities were demonstrated in contrast to LiTi2(PO4)3@C (LTP@C). Typically, the LTP@C/CNTs electrode achieves a discharge capacity of 97.37 mAhg−1 and 90.88 mAhg−1 in ALIBs and ASIBs half cells at 3 A g-1 current density. LTP@C/CNTs//LiMn2O4 and LTP@C/CNTs//Na0.44MnO2 full cells show the capacity retention of 72.9% and 79.4% after 500 cycles. Besides, new electrochemical behavior is reported for the first time, that the anode materials present a two-step sodium ion insertion/extraction in ASIBs. After cycling, LTP anode converts into (NaTi2(PO4)3) NTP phase with maintained crystallinity. LTP@C/CNTs composite anode thus shows a great potential application in next-generation aqueous energy storage systems. © 2020 Elsevier B.V.
Keyword ：
Anodes Crystallinity Current density Electric discharges Electrolytes Energy storage Lithium compounds Lithium-ion batteries Metal ions Metals Sodium-ion batteries Titanium compounds
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| GB/T 7714 | Xu, Tong , Zhao, Mingshu , Su, Zhou et al. Nanostructured LiTi2(PO4)3 anode with superior lithium and sodium storage capability aqueous electrolytes [J]. | Journal of Power Sources , 2021 , 481 . |
| MLA | Xu, Tong et al. "Nanostructured LiTi2(PO4)3 anode with superior lithium and sodium storage capability aqueous electrolytes" . | Journal of Power Sources 481 (2021) . |
| APA | Xu, Tong , Zhao, Mingshu , Su, Zhou , Duan, Wenyuan , Shi, Yuanzhe , Li, Zheng et al. Nanostructured LiTi2(PO4)3 anode with superior lithium and sodium storage capability aqueous electrolytes . | Journal of Power Sources , 2021 , 481 . |
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