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| 1 | A fatigue damage model for rock salt considering the effects of loading frequency and amplitude显示文摘With the large-scale construction of underground gas storage in salt deposit, much more efforts have been made to assess the fatigue properties of rock salt. The fatigue damage processes the primary, steady,and accelerated phases, which is similar to the axial irrecoverable deformation compiled from the loci of the loading cycles of rock salt. The cumulative fatigue damage increases with a decrease in the loading frequency and with an increase in the stress amplitude within the range tested. To take into account the effects of loading frequency and amplitude on the fatigue behavior of rock salt subjected to cyclic loading, a low cycle fatigue damage model was exclusively established combined with the Manson–Coffin formula. The proposed damage evolution equation was validated with experimental results and proved to be efficient in the prediction of fatigue damage tendency of rock salt under different loading frequencies and amplitudes. | Wang Yasong Ma Linjian Fan Pengxian Chen Yan | 2016 | International Journal of Mining Science and Technology2016，26，5： | 6 |
| 2 | Nanostructured transition metal nitride composites as energy storage material显示文摘There are growing demands for the next generation lithium ion batteries with high energy density as well as high power performance for renewable energy storage and electric vehicles application.Recently,nanoscale materials with outstanding energy storage capability have received considerable attention due to their unique effect caused by the reduced dimensions.This review describes some recent developments of our group in research of transition metal nitride nanocomposites in application of energy storage,especially for lithium ion battery and supercapacitor.The strategies of mixed conduction(electron and ion) network with a favorable charge transportation interface in the design of the nanocomposites for such devices are highlighted. | YUE YanHua HAN PengXian DONG ShanMu ZHANG KeJun ZHANG ChuanJian SHANG ChaoQun CUI-GuangLei | 2012 | Chinese Science Bulletin2012，57，32： | 3 |
| 3 | An insight into failure mechanism of NASICON-structured Na3V2(PO4)3 in hybrid aqueous rechargeable battery显示文摘NASICON (Na-super-ionic-conductors)-structured materials have attracted extensive research interest due to their great application potential in secondary batteries. However, the mechanism of capacity fading for NASICON-structured electrode materials has been rarely studied. In this paper, we synthesized the NASICON-structured Na3V2(PO4)3/C composite by simple sol-gel and high-temperature solid-phase method and investigated its electrochemical performance in Na-Zn hybrid aqueous rechargeable batteries. After characterizing the structure, morphology and composition variations as well as the interfacial resistance changes of Na3V2(PO4)3/C cathode during cycling, we propose a mechanical and interfacial degradation mechanism for capacity fading of NASICON-structured Na3V2(PO4)3/C in Na-Zn hybrid aqueous rechargeable batteries. This work will shed light on enhancing the mechanical and in terfacial stability of NASICON-structured Na3V2(PO4)3/C in Na-Zn hybrid aqueous rechargeable batteries. | Xinxin Zhang Jun Ma Pu Hu Bingbing Chen Chenglong Lu Xinhong Zhou Pengxian Han Lihua Chen Guanglei Cui | 2019 | Journal of Energy Chemistry2019，28，5： | 3 |
| 4 | Failure behavior of highly stressed rocks under quasi-static and intensive unloading conditions显示文摘Unloading failure of rocks,especially highly stressed rocks,is one of the key issues in construction of underground structures.Based on this,analytical models for rocks under quasi-static and intensive unloading conditions are established to study the failure behavior of highly stressed rocks.In case of rock failure under quasi-static unloading,the rock mass ahead of working face is regarded as an elasto-brittle material,and the stress-displacement curves are used to characterize the tensile fracture of peak-stress area.It is observed that,when intensive unloading happens,there is an elastic unloading wave(perturbation wave) propagating in the rock mass.If the initial stress exceeds the critical stress,there will be a fracture wave,following the elastic unloading wave.To study the propagation feature of fracture wave,the conservation laws of mass,momentum and energy are employed.Results show that the post-peak deformation,strength and energy dissipation are essential to the failure process of highly stressed rocks. | Jie Li Pengxian Fan Mingyang Wang | 2013 | Journal of Rock Mechanics and Geotechnical Engineering2013，5，4： | 3 |
| 5 | Nitrogen-doping of Chemically Reduced Mesocarbon Microbead Oxide for the Improved Performance of Lithiumion Batteries显示文摘 | Han Pengxian Yue Yanhua Zhang Longxia | 2012 | Carbon2012，50，3： | 1 |
| 6 | A study of electronic structure and lattice dynamics of Co Sb3skutterudite显示文摘 | Pengxian Lu Qiuhua Ma Yuan Li | 2010 | Journal of Magnetism and Magnetic Materials2010，322，： | 1 |
| 7 | New method to grow preferentially-oriented 4H-SiC films on Si substrate显示文摘SILICON carbide, a semiconductor with chemistry inertia, is well suited to fabricate optoelectronic device working at high temperature, high power, high frequency, and in high radiation environments. Among the hundreds of SiC polytypes, 4H-SiC, with a wider bandgap, a higher and much less anisotropic electron mobility than 6H-SiC, has aroused much attention . | Zhengping Fu Beifang Yang Ruchuan Liu Pengxian Zhang Yaozhong Ruan | 1999 | Chinese Science Bulletin1999，44，6： | 1 |
| 8 | Graphene oxide nanoplatelets as excellent electrochemical active materials for VO 2+ / VO 2 + and V 2+ /V 3+ redox couples for a vanadium redox flow battery显示文摘 | Pengxian Han Haibo Wang Zhihong Liu Xiao Chen Wen Ma Jianhua Yao Yuwei Zhu Guanglei Cui | 2010 | Carbon2010，，2： | 1 |
| 9 | High-adhesion anionic copolymer as solid-state electrolyte for dendrite-free Zn-ion battery显示文摘To conquer severe dendrites formation and side reactions of zinc metal anodes,which are serious obstacles for the practical applications of aqueous zinc ion battery(ZIB),herein,we develop a sodium allysulfonate(SAS)and acrylamide(AM)copolymer by radical polymerization process(crosslinking of C=C)as solid-state electrolyte.The interface kinetics is improved remarkably due to the high adhesion and excellent ion transferability of AM-SAS(AS)copolymers.Especially the sulfonic acid group in the hydrogel electrolyte can enhance the internal ionic conductivity effectively benefiting from its high affinity to Zn^(2+).Also,polymer chains realize re-regulation to Zn^(2+)flow in atomic-scale,thus leading to controllable deposition of Zn onto the dendrite-free Zn anodes.Consequently,the AS-1.5 electrolyte achieves ultra-stable Zn deposition/stripping behaviors with the lifespan over 1,000 h via the suppression of side-reactions and paralleled Zn deposition.High performances of Zn/Mn-doped V_(2)O_(5)(MnVO)(over 500 cycles)and Zn/diquinoxalino[2,3-a:2',3'-c]phenazine(HATN)(over 2,500 cycles)full cells demonstrate that the AS hydrogel electrolyte is a common approach for ZIBs under various conditions.This molecular regulation engineering opens a novel route for hydrogel electrolyte fabrication,where sulfonic groups perform as media of Zn^(2+)transfer.Therefore,high bulk ionic conductivity as well as excellent interface ion diffusion ability is obtained. | Jiaxu Li Junfeng Ren Caixia Li Pengxian Li Tingting Wu Shiwei Liu Lei Wang | 2022 | Nano Research2022，15，8： | 0 |
| 10 | Optimization on transport of charge carriers in cathode of sulfide electrolyte-based solid-state lithium-sulfur batteries显示文摘Lithium-sulfur(Li-S)batteries are considered as promising candidates for novel energy storage technology that achieves energy density of 500 Wh·kg^(−1).However,poor cycle stability resulting from notorious shuttle effect and the safety concerns deriving from flammability of ether-based electrolyte hinder the practical application of Li-S batteries.Because of low solubility to polysulfide,high ionic conductivity,and safety property,sulfide-based electrolytes can fundamentally address above issues.It is widely known that the effective transports of both electrons and ions are basic requirement for redox reaction of active materials in cathode.Thereby,construction of fast and stable ionic and electronic transport paths in cathode is especially pivotal for cycle stability of solid-state Li-S batteries(SSLSBs).In this review,we provide research progresses on facilitating transport of charge carriers in composite cathode of SSLSBs.From perspective of materials,intrinsically conductivity of electrolyte and carbon shows dramatic effect on migration of charge carriers in cathode of SSLSBs,thereby the conductive additives are summarized in the manuscript.Additionally,the charge transport in cathode of SSLSBs fully depends on the physical contact between active materials and conductive additives,therefore we summarized the strategies optimizing interfacial contact and reducing interfacial resistance.Finally,potential future research directions and prospects for SSLSBs with improved energy density and cycle performance are also proposed. | Zengqi Zhang Yantao Wang Tao Liu Gang Li Jun Ma Jianjun Zhang Pengxian Han Shanmu Dong Xuedong Yan Yue Tang Guanglei Cui | 2023 | Nano Research2023，16，6： | 0 |
| 11 | Synthesis of Core-shell ZSM-5@ Ordered Mesoporous Silica by Tetradecylamine Surfactant显示文摘A core-shell composite consisting of ZSM-5 zeolite as the core and ordered mesoporous silica as the shell was prepared by a surfactant-controlled sol-gel process and using tetradecylamine(TDA) as the template and Tetraethylorthosilicate(TEOS) as the silica precursor.The pores of the silica shell were found to be ordered and perpendicular to the crystal faces of the zeolite core.The thickness of the shell in the coreshell structured composite can be adjusted in the range of 20-90 nm,while the surface morphology and the pore size distribution were modified by changing the mass ratio of TEOS to zeolite.The composite molecular sieves have higher surface area for capturing molecules than ZSM-5,and with the increase of mesoporous shell layer,the ZSM-5@SiO_(2)-x composites show stronger adsorption capacity of butyraldehyde.However,when the shell thickness exceeds 90 nm,the adsorption capacity of butyraldehyde decreases instead.The composites have a huge potential for environmental applications. | 马扩彦 ZHAO Pengxian YI Hongyu 俞海军 ZHOU Moxi ZHANG Lingling LIU Yupu | 2024 | Journal of Wuhan University of Technology(Materials Science)2024，39，2： | 0 |
| 12 | Experimental study on the irreversible displacement evolution and energy dissipation characteristics of disturbance instability of regular joints显示文摘To investigate the disturbance-induced shear instability mechanism of structural catastrophe in the deep rock mass,MTS 815 material testing machine was used to carry out quasi-static loading tests and disturbance shear tests on symmetrical regular dentate joints of two materials at three undulation angles under specific initial static stress,disturbance frequency,and peak value.The test results indicate that:(i)the total ultimate instability displacement is only related to the intrinsic properties of the joints but not to the initial static stress and disturbance parameters;(ii)the cumulative irreversible displacement required for the disturbance instability conforms to the logistic inverse function relationship with the number of disturbances,displaying the variation trend of“rapid increase in the front,stable in the middle,and sudden increase in the rear”;(iii)the accumulation of plastic deformation energy is consistent with the evolution law of irreversible displacement of joints and the overall proportion of hysteretic energy is not large;(iv)the dissipated energy required for the instability of each group of joints is basically the same under various disturbance conditions,and this energy is mainly controlled by the initial shear stress and has no connection with the disturbance parameters.The stability of the total disturbance deformation and the disturbance energy law of the joints revealed in the tests provide data support for reasonably determining the disturbance instability criterion of joints. | Jianan Yang Pengxian Fan Mingyang Wang Jie Li Lu Dong | 2023 | Deep Underground Science and Engineering2023，2，1： | 0 |
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