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| 1 | Pseudocapacitance boosted N-doped carbon coated Fe7S8 nanoaggregates as promising anode materials for lithium and sodium storage显示文摘Herein,the core-shell structured N-doped carbon coated Fe7S8 nano-aggregates(Fe7S8@NC)were controllably prepared via a simple three-step synthesis strategy.The appropriate thickness of N-doped carbon layer outside Fe7S8 nano-aggregates can not only inhibit the particle pulverization induced by the big volume changes of Fe7S8,but can increase the electron transfer efficiency.The hierarchical Fe7S8 nano-aggregates composed of some primary nanoparticles can accelerate the lithium or sodium diffusion kinetics.As anode materials for Li-ion batteries(LIBs),the well-designed Fe7S8@NC nanocomposites exhibit outstanding lithium storage performance,which is better than that of pure Fe7S8,Fe3O4@NC and Fe7S8@C.Among these nanocomposites,the N-doped carbon coated Fe7S8 with carbon content of 26.87 wt.%shows a high reversible specific capacity of 833 mAh·g^−1 after 1,000 cycles at a high current density of 2 A·g^−1.The above electrode also shows excellent high rate sodium storage performance.The experimental and theoretical analyses indicate that the outstanding electrochemical performance could be attributed to the synergistic effect of hierarchical Fe7S8 nanostructure and conductive N-doped carbon layer.The quantitative kinetic analysis indicates that the charge storage of Fe7S8@NC electrode is a combination of diffusion-controlled battery behavior and surface-induced capacitance behavior. | Yanli Zhou Ming Zhang Qi Wang Jian Yang Xingyun Luo Yanlu Li Rong Du Xinsheng Yan Xueqin Sun Caifu Dong Xiaoyu Zhang Fuyi Jiang | 2020 | Nano Research2020，13，3： | 4 |
| 2 | Signal characteristics of coal and rock dynamics with micro-seismic monitoring technique显示文摘In this study,differences of signal characteristics between mine shocks and coal and gas outbursts in coal mines were examined with the micro-seismic monitoring technique and time–frequency analysis.The duration of the mine shock is short while the coal and gas outburst lasts longer.The outburst consists of three stages:the pre-shock,secondary shock and main shock stage,respectively.The velocity amplitude of the mine shock is between 10^(-)5and 10^(-3)m/s,which is higher than that of the outburst with the same energy level.In addition,in both cases,the correlation between the velocity amplitude and energy is positive while the correlation between the signal frequency band distribution and energy is negative.The signal frequency band of the high energy mine shock is distributed between 0 and 50 Hz,and the low energy mine shock is between 50 and 100 Hz.The fractal characteristics of mine shocks were studied based on a fractal theory.The box dimensions of high energy mine shocks are lower than the low energy ones,however,the box dimensions of outbursts are higher than that of mine shocks with the same energy level.The higher box dimensions indicate more dangerous dynamic events. | Ding Yanlu Dou Linming Cai Wu Chen Jianjun Kong Yong Su Zhenguo Li Zhenlei | 2016 | International Journal of Mining Science and Technology2016，26，4： | 2 |
| 3 | Electrical properties of yttrium calcium oxyborate crystal annealed at high temperature and low oxygen partial pressure显示文摘The yttrium calcium oxyborate crystal(YCa_(4)O(BO_(3))_(3),YCOB)has been actively studied for hightemperature piezoelectric sensing applications.In this work,the stability of electric properties of YCOB crystal annealed in critical conditions(high-temperatures of 900-1100℃ with a low oxygen partial pressure of 4×10^(-6) atm for 24 h)was investigated and the recovery mechanism for the electrical resisitivity,dielectric permittivity and dielectric loss were studied,taking advantage of the X-ray photoelectron spectra and the first principle calculations.The electrical resistivity of the annealed YCOB crystal was slightly decreased when compared to the pristine counterpart,being(2-5)×10^(7) Ω·cm at 850C.The dielectric permittivity and dielectric loss were found to increase after annealing,showing recoverable behaviours after thermal treatment above 650℃ in air.The calculated vacancy formation energy indicates that the oxygen vacancy is the dominant defects in YCOB.The formation of oxygen vacancy weakens the chemical bonding strength between B(Ca or Y)and O atoms,introduces extra donor levels in the band gap,which excites the electrons to conduction band more easily thus enhances the electrical conductivity and dielectric loss.The recovered electrical properties are believed to be associated with the reduced vacancy defects at elevated temperatures in air. | Shiwei Tian Lili Li Feifei Chen Chao Jiang Fapeng Yu Yanlu Li Xiulan Duan Zhengping Wang Shujun Zhang Xian Zhao | 2019 | Journal of Materiomics2019，5，3： | 2 |
| 4 | Switchable half-metallicity in A-type antiferromagnetic NiI_(2)bilayer coupled with ferroelectric In_(2)Se_(3)显示文摘Electrically controlled half-metallicity in antiferromagnets is of great significance for both fundamental research and practical application.Here,by constructing van der Waals heterostructures composed of two-dimensional(2D)A-type antiferromagnetic NiI_(2)bilayer(bi-NiI_(2))and ferroelectric In_(2)Se_(3)with different thickness,we propose that the half-metallicity is realizable and switchable in the bi-NiI_(2)proximate to In_(2)Se_(3)bilayer(bi-In_(2)Se_(3)).The polarization flipping of the bi-In_(2)Se_(3)successfully drives transition between half-metal and semiconductor for the bi-NiI_(2).This intriguing phenomenon is attributed to the joint effect of polarization field-induced energy band shift and interfacial charge transfer.Besides,the easy magnetization axis of the bi-NiI_(2)is also dependent on the polarization direction of the bi-In_(2)Se_(3).The half-metallicity and magnetic anisotropy energy of the bi-NiI_(2)in heterostructure can be effectively manipulated by strain.These findings provide not only a feasible strategy to achieve and control half-metallicity in 2D antiferromagnets,but also a promising candidate to design advanced nanodevices. | Yaping Wang Xinguang Xu Xian Zhao Weixiao Ji Qiang Cao Shengshi Li Yanlu Li | 2022 | npj Computational Materials2022，，1： | 1 |
| 5 | Abnormal lattice occupation of Mo and related polarons in LiNbO_(3): Hybrid density functional theory investigation显示文摘Studies have reported that Mo-doped LiNbO_(3) exhibits excellent photorefractive performance,which may be attributed to the Mo abnormally occupation in Nb sites(MoNb)and the MoNb photorefractive centres.Therefore,we investigate the basic characteristics of Mo-doped LiNbO_(3),including the preferable substitutional sites,doping stability,lattice relaxation,and electronic structures using the spin-polarised density functional theory within semi-local and hybrid functionals.Particularly,the type and properties of the polarons in Mo-doped LiNbO_(3) are studied intensively,and the advantages of MoNb polarons with respect to the MoLi polarons are highlighted.The calculation results of both transfer energies and defect formation energies show that MoNb are preferable to be formed in both stoichiometric and congruent LiNbO_(3),while Mo substitutional Li(MoLi)is consumed in small amounts.MoNb could act as small bound polarons that exhibit fast response to light with respect to the MoLi bound bipolarons.The introduced double-centre by Mo doping is partly responsible for the excellent photorefractive properties of Mo-doped LiNbO_(3). | Lili Li Yanlu Li Xian Zhao Xiufeng Cheng Yongjun Fan | 2020 | Journal of Materiomics2020，6，1： | 0 |
| 6 | Nickel effects on growth and antioxidative enzymes activities in desert plant Zygophyllum xanthoxylon (Bunge) Maxim显示文摘One-month old Zygophyllum xanthoxylon seedlings were grown under five different Ni concentrations (0, 50, 150, 450 and 900 mg/kg). Growth parameters, tissues Ni accumulation, soluble protein content, photosynthetic pigment content, lipid peroxidation, antioxidative enzyme activities, and proline content were studied after one month of Ni exposure. The significant reduction in fresh biomass in the shoot and roots was detected at high Ni concentrations (≥450 mg/kg), whereas dry biomass was not significantly affected in both organs by any of the Ni doses tested. The Ni contents in the shoots and roots increased in a dose-dependent manner, and Ni contents in roots were higher than that in shoots at all treatments. The high Ni doses elevated soluble protein contents in leaves and roots. No visible symptoms of chlorosis were observed in leaves of plants grown in presence of Ni. Malondialdehyde (MDA) contents significantly increased in leaves and roots at high Ni treatments (≥450 mg/kg), indicating that Ni induces oxidative stress. Enzyme activities might play a central role in cellular protection against the Ni induced oxidative stress. Proline contents proportionally increased with the elevated Ni concentrations. Zygophyllum xanthoxylon revealed moderate Ni tolerance under tested culture conditions, and could be used as tools for revegetation for erosion control in moderate Ni contaminated sites. | YanLu XinRong Li MingZhu He ZhengNing Wang HuiJuan Tan | 2010 | Research in Cold and Arid Regions2010，2，5： | 0 |
| 7 | Magmatic hydrothermal fluid genesis of zeolite in the Paleogene Kongdian Formation of Zaoyuan oilfield,Bohai Bay Basin,China显示文摘Electronic probe,fluid inclusion homogenization temperature,Raman spectroscopy and laser ablation inductively coupled plasma mass spectrometry were utilized to identify the hydrothermal fluid-rock interactions in the second member of the Paleogene Kongdian Formation of Zaoyuan oilfield in Bohai Bay Basin(Kong 2 Member for short)of Well Z56 to find out the relationship between zeolite and hydrothermal fluid.The experimental results show that:(1)Pyrobitumen coexists with hydrothermal fluid characteristic minerals such as chlorite,barite,chalcopyrite,pyrite,natrolite and analcime in mudstone fractures.(2)The temperatures calculated from laser Raman spectrum of pyrobitumen,from the chlorite geothermometer and from measured homogenization temperature of natrolite inclusions are 324-354℃,124-166℃ and 89-196℃,respectively;although vary widely,all the temperatures are obviously higher than the normal geothermal temperature.(3)The positive Eu anomaly of chlorite and barite,and the similar distribution pattern in rare earth elements between natrolite and basalt indicate they are from magmatic hydrothermal fluid.Moreover,drilling data shows that the Kong 2 Member in Well Z56 has several sets of basalt interlayers,suggesting there was geologic base of magmatic hydrothermal fluid activity.The magmatic hydrothermal fluid-rock interaction may be one of the reasons for the abnormal enrichment of zeolite in Kong 2 Member of the Cangdong Sag. | HAN Guomeng WANG Li XIAO Dunqing LOU Da XU Muyue ZHAO Yonggang PEI Yanlu GUO Xiaowen TENG Jiancheng' HAN Yuanjia | 2021 | Petroleum Exploration and Development2021，48，5： | 0 |
| 8 | Potential of Dragon’s Blood as a Space Radiation Protectant Especially on Brain-Liver Bystander Effect显示文摘During space manned missions,radiation is a serious health risk.Radiation can not only directly cause damage to target organs but also trigger side effects to affect nontarget organs.Dragon’s Blood(DB)is a traditional Chinese Dai medicine that has been proven to exhibit radioprotective effects in our lab previously.It can alleviate brain damage,hematopoietic dysfunction,and gastrointestinal damage caused by radiation in rats,but its mechanism of action is not clear yet.In order to study the effect of brain irradiation on the damage to the liver and the protective effects of Dragon’s Blood,herein,liquid chromatography coupled with a mass spectrometer was used to analyze the total differential protein expression in the rat liver after 30 Gy Co^(60)γ-ray whole-brain irradiation with/without administration of Dragon’s Blood for 10 days before irradiation.A total of 4557 proteins were identified in the rat liver.A total of 299 coexpressed differential proteins were screened in the RAD/CON group indicating that brain radiation significantly affected the liver’s metabolic system(such as drug and arachidonic acid metabolism),chemical carcinogenesis,and peroxisome process.A total of 85 differential proteins were screened in the DB/RAD group.Results indicated that Dragon’s Blood significantly regulated the expression of 26 proteins to normal levels(Msrb2,Txnrd2,Samm50,Pir,Pex11a,etc.)mainly through regulating the metabolism and redox homeostasis process.The results of molecular docking and network pharmacology found that the main effective radiation protection components in Dragon’s Blood are natural chalcones,flavan,and phenolic derivatives. | Bo Li Tianmei Li Chu Han Yuanyuan Liu Xia Zhong Yanlu Cao Yulin Deng | 2022 | Space(Science & Technology)2022，，1： | 0 |
| 9 | Improved Na storage and Coulombic efficiency in TiP_(2)O_(7)@C microflowers for sodium ion batteries显示文摘Ti-based anode materials in sodium ion batteries have attracted extensive interests due to its abundant resources,low toxicity,easy synthesis and long cycle life.However,low Coulombic efficiency and limited specific capacity affect their applications.Here,cubic-phase TiP_(2)O_(7)is examined as anode materials,using in-situ/ex-situ characterization techniques.It is concluded that the redox reactions of Ti4^(+)/Ti^(3+)and Ti^(3+)/Ti^(0)consecutively occur during the discharge/charge processes,both of which are highly reversible.These reactions make the specific capacity of TiP_(2)O_(7)even higher than the case of TiO2 that only contains a simple anion,0^(2-).Interestingly,Ti species participate only one of the redox reactions,due to the remarkable difference in local structures related to the sodiation process.The stable discharge/charge products in TiP_(2)O_(7)reduce the side reactions and improve the Coulombic efficiency as compared to T i02.These features make it a promising Ti-based anode for sodium ion batteries.Therefore,TiP_(2)O_(7)@C microflowers exhibit excellent electrochemical performances,〜109 mAh·g^(-1)after 10,000 cycles at 2 A·g^(-1),or 95.2 mAh·g^(-1)at 10 A·g^(-1).The results demonstrate new opportunities for advanced Ti-based anodes in sodium ion batteries. | Jun Pan Nana Wang Lili Li Feng Zhang Zhenjie Cheng Yanlu Li Jian Yang Yitai Qian | 2021 | Nano Research2021，14，1： | 0 |
| 10 | Exploitable magnetic anisotropy and half-metallicity controls in multiferroic van der Waals heterostructure显示文摘Two-dimensional(2D)XY ferromagnets have drawn pronounced interest in recent years,but the characteristic of easy-plane magnetization restricts their application in spintronics to some extent.Here,we propose a general strategy for constructing multiferroic van der Waals heterostructures,aiming to achieve electrical control over the magnetic anisotropy in 2D XY ferromagnets.The validity of this strategy is verified by the heterostructure composed of ferromagnetic VBi_(2)Te_(4) and ferroelectric In_(2)Se_(3) monolayers.By manipulating the polarized states of In_(2)Se_(3),the VBi_(2)Te_(4) can be reversibly transformed between 2D XY and Heisenberg ferromagnets,characterized by the switching of easy magnetization axis between in-plane and out-of-plane directions.More interestingly,accompanied by the changes in magnetic anisotropy,the VBi_(2)Te_(4) also demonstrates a phase transition from a semiconductor to a half-metal state,which can be ascribed to the band alignment and interfacial charge transfer.The switchable magnetic and electronic properties enable the heterostructure to be utilized in nonvolatile memory and logic devices.Additionally,the half-metallicity and magnetocrystalline anisotropy energy of the heterostructure can be effectively tuned by biaxial strain.These findings not only pave the way for electrically nonvolatile control of 2D XY ferromagnet,but also facilitate the development of interfacial magnetoelectric physics and applications. | Yaping Wang Xinguang Xu Weixiao Ji Shengshi Li Yanlu Li Xian Zhao | 2023 | npj Computational Materials2023，，1： | 0 |
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