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1Petrogenesis of highly fractionated I-type granites in the Zayu area of eastern Gangdese, Tibet: Constraints from zircon U-Pb geochronology, geochemistry and Sr-Nd-Hf isotopes显示文摘The Cretaceous granitoids in the middle and northern Gangdese, Tibet are generally interpreted as the products of anatexis of thickened deep crust genetically associated with the Lhasa-Qiangtang collision. This paper reports bulk-rock major element, trace element and Sr-Nd isotopic data, zircon U-Pb age data, and zircon Hf isotopic data on the Zayu pluton in eastern Gangdese, Tibet. These data shed new light on the petrogenesis of the pluton. Our SHRIMP zircon U-Pb age dates, along with LA-ICPMS zircon U-Pb age dates recently reported in the literature, indicate that the Zayu pluton was emplaced at about 130 Ma, coeval with Early Cretaceous magmatic rocks in other areas of eastern Gangdese (e.g., Rawu, Baxoi areas) and the Middle Gangdese. The Zayu pluton samples lack amphibole and muscovite, and are compositionally characterized by high SiO2 (69.9%―76.8%), K2O (4.4%―5.7%), and low P2O5 (0.05%―0.12%). These samples also have A/CNK values of 1.00-1.05, and are enriched in Rb, Th, U, and Pb, and depleted in Ba, Nb, Ta, Sr, P, Ti, and Eu. These geochemical features suggest that the Zayu pluton samples are metaluminous to slightly peraluminous and are of highly fractionated I-type granite. The Zayu pluton samples have high εNd(t) values (-10.9--7.6) and low initial 87Sr/86Sr ratios (0.7120- 0.7179) relative to melts derived from mature continental crust in the Gangdese (e.g., Ningzhong Early Jurassic strongly peraluminous granite). The Zayu pluton samples are heterogeneous in zircon εHf(t) values (-12.8--2.9), yielding ancient zircon Hf crustal model ages of 1.4―2.0 Ga. The data obtained in this study together with the data in the recent literature suggest that the Early Cretaceous granitoids in eastern Gangdese represent the eastward extension of the Early Cretaceous magmatism in the middle Gangdese, and that the Lhasa micro-continent block with ancient basement may extend for ~2000 km from east to west. Zircon Hf isotopic data and bulk-rock zircon saturation temperature (789-821℃) indicate that mantle-derived materials likely played a role in the generation of the Zayu pluton. We propose that the Zayu pluton was most likely generated in a setting associated with southward sub- duction of the Bangong-Nujiang ocean floor, where mantle wedge-derived magmas may have providedthe heat and material for the anatexis of ancient crust of the Lhasa micro-continent, resulted in hybrid melts (i.e., mantle-derived basaltic magmas + crust-derived felsic magmas). Such hybrid melts with subsequent fractional crystallization are responsible for the highly evolved Zayu pluton (crust thick- ening is not a prerequisite).ZHU DiCheng MO XuanXue WANG LiQuan ZHAO ZhiDan NIU Yaoling ZHOU ChangYong YANG YueHeng 2009Science China Earth Sciences2009,52,9:107
2Geochronologic Constraints on the Magmatic Underplating of the Gangdisê Belt in the India-Eurasia Collision: Evidence of SHRIMP II Zircon U-Pb Dating显示文摘丰富的小 mafic 侵入发生沿着 theGangdise magmatic 与 granitoids 联系了带。除了在 granitoid plutons 以内的许多分离斑粝岩身体, agabbro 辉岩地区沿着 Gangdise 带的南部的边缘发生到 theYarlung Zangbo 缝术的北方。mafic 侵入地区空间地对应于一个强壮的空中地磁学的异例,它扩大约 1400 km。mafic 侵入由斑粝岩和粗玄岩的间歇地分布式的小身体和堤组成与辉岩,橄榄石辉岩, pegmatitic 辉岩和角闪岩积累。许多证据显示 Gangdise gabbro-pyroxeniteassemblage 是最可能的结果在导出披风的岩浆的 plating 下面。详细的地调查和 mafic 岩石的系统的采样在六个地点被进行,沿着 mafic intrusive 地区的 theLhasa-Xigaze 片断,并且被标明日期的锆石虾 II U-Pb 跟随。除了二岁,样品以前出版了(47.0 +- 1 个妈和 48.9 +- 1.1 妈) ,四斑粝岩取样的留下的同位素年龄是 51.6 +- 1.3Ma, 52.5 +- 3.0 妈, 50.2 +-第 4.2Maa 49.9 +- 1.1Ma。年龄(47-52.5 妈) 提供的这些的范围在 Gangdise 下面在 plating 下面岩浆预定的 Eocene 上的 geochronologic 限制在 ca 系上带子。50 妈。这在 plating 下面 eventpost 过时到 1500 万年的印度欧亚大陆大陆碰撞的开始并且与岩浆混合的一个过程是同时期的。虾 II U-Pb 同位素分析也从一些锆石谷物发现几老年,主要在 479-526 妈的一个范围(加权的平均年龄 503+- 10 妈) ,当时,因此关于先存在的下地壳产出信息在 maficmagma 的 plating 下面发生。在 plating 下面的岩浆在印度欧亚大陆的碰撞期间是为外壳的生长的主要机制之一,这被相信,可能相应及时到 the14-16 的形成 km 厚“外壳披风过渡地区”由 Vp = 6.85-6.9 km/s 描绘了。DONG Guochen MO Xuanxue ZHAO Zhidan GUO Tieying WANG Liangliang CHEN Tao 2005Acta Geologica Sinica(English Edition)2005,79,6:50
3Geochronology and Nd and Pb isotope characteristics of gabbro dikes in the Luobusha ophiolite, Tibet显示文摘We report a combined internal and whole-rock Sm-Nd isochron age, and Nd and Pb isotopic data for gabbro dikes of the Luobusha ophiolite in Tibet. The Sm-Nd isochron of data for two whole rocks and plagioclase and clinopyroxene separates from one of the rocks yields a Middle Jurassic age of (177±31) Ma (with an initial εNd(t) = +8), which provides a significant bound on the time of formation of the Luobusha ophiolite. The Nd and Pb isotopic charac-teristics of the dike indicate an Indian-Ocean-type isotopic affinity, and we conclude that the Luobusha ophiolite formed in an oceanic setting during the Middle Jurassic.ZHOU Su MO Xuanxue J.J.Mahoney ZHANG Shuangquan GUO Tieyjing ZHAO Zhidan 2002Chinese Science Bulletin2002,47,2:38
4Constraining quantitatively the timing and process of continent-continent collision using magmatic record: Method and examples显示文摘Based on the main driving force of plate motion(the slab pull force generated by the descent of the oceanic plate in subduction zones) and the three primary mechanisms for magma generation(adding fluid, increasing temperature, and decreasing pressure), the continent-continent collisional process has been divided into three stages, including initial collision, ongoing collision, and tectonic transition. These stages are characterized by normal calc-alkaline andesitic magma(dehydration of the oceanic crust to release fluids), the migration of calc-alkaline magma toward the trench(dehydration of the oceanic crust or an increase in temperature) or small-scale crust-derived peraluminous magma(heat from intra-crustal shearing), and extensive magmatism with compositional diversity induced by slab break-off(increasing temperature and decreasing pressure), respectively.On the basis of the obtained age of slab break-off, the timing of the initial continent-continent collision can be quantitatively back-dated using the convergence rate, depth of slab break-off, and subduction angle. The spatio-temporal migration of the magmatic activity of the Gangdese Batholith, the onset of magmatic flare-up, and the increase of magma temperature at 52–51Ma documented by the volcanic rocks of the Linzizong Pana Formation were most likely the result of the break-off of the Yarlung-Zangbo Neo-Tethyan oceanic lithosphere at approximately 53 Ma. This proposed age of slab break-off suggests that the initial India-Asia collision likely occurred at approximately 55–54 Ma, which is consistent with the collision ages constrained by other abundant geological data(60–55 Ma). This magmatic method has been applied to the Bitlis orogenic belt in southern Turkey in the Arabia-Eurasia continental collision zone, yielding an age range of approximately 29–22 Ma for the initial Arabia-Asia continental collision that is close to the collision ages recently obtained by apatite fission-track dating(approximately20 Ma) and regional tectonic shortening(approximately 27 Ma). The intense folding of the Upper Cretaceous and the angular unconformity between the overlying Linzizong volcanic rocks in the southern Lhasa Terrane(90.69 Ma) are not related to the initial continental collision between India and Asia, but can be interpreted as the consequences of the strong coupling between the hot and young subducting oceanic crust immediately south of the spreading ridge and the overriding lithosphere or the subduction of the Neo-Tethys oceanic plateaux or seamounts. The tectonic event documented by the angular unconformity between the Linzizong Dianzhong Formation and the Nianbo Formation lasted approximately 3 Ma and likely marks the initial India-Asia collision. The significant deceleration of the Indian continent at approximately 51 Ma can be attributed to the disappearance of the slab pull force in the subduction zone due to the break-off of the Yarlung-Zangbo Neo-Tethyan oceanic lithosphere. The descent of the eclogitized lower crust of the northern Indian continent provides the main driving force for the current northward motion of Indian plate. The weak deformation of the lithospheric plate in the overriding plate of the India-Asia collisional zone between 60 and 40 Ma can be attributed to the high-angle subduction related to the rollback of the Yarlung-Zangbo Neo-Tethyan oceanic lithosphere after the initial India-Asia continental collision, the presence of the thick crust and high elevation on the southern margin of the Lhasa Terrane, and the decoupling between the mid-upper and lower crust and between the lower crust and lithospheric mantle of the Indian continent.ZHU DiCheng WANG Qing ZHAO ZhiDan 2017Science China Earth Sciences2017,60,6:23
5TRPV1 activation improves exercise endurance and energy metabolism through PGC-1α upregulation in mice显示文摘Zhidan Luo Liqun Ma Zhigang Zhao Hongbo He Dachun Yang Xiaoli Feng Shuangtao Ma Xiaoping Chen Tianqi Zhu Tingbing Cao Daoyan Liu Bernd Nilius Yu Huang Zhencheng Yan Zhiming Zhu 2012Cell Research2012,22,3:18
6High Temperature Strain Structures and Quartz C-Axis Fabrics from Mylonitic Rocks in the Ailaoshan-Red River Shear Zone,Yunnan,and Their Tectonic Implication显示文摘Ailaoshan 红的河(ASRR ) 砍地区是考虑了东方西藏的现在的构造框架的主要东南亚洲构造断绝之一。几座变形山岳沿着 shear 地区线性地是分布式的,例如从北方的 Xuelongshan, Diancangshan, Ailaoshan 和到南方的天 Nui 反对 Voi。他们为构造进化忍受证据的很多线东方在在不同构造舞台的不同外壳的层次西藏。争吵仍然沿着 ASRR 在有变态的变丑结构,微观结构和他们的关系上存在。在这,纸详细说明了微结构和 EBSD (电子 Backscattered 衍射) 从沿着 ASRR 的不同山岳的一些高度砍的花岗石的岩石的织物分析被进行。高温度结构和微观结构在 unsheared 片麻岩被保存,在微弱地砍的捕虏体或在高度砍的岩石(糜棱岩) 的一些部分。高温度石英 c 轴织物的几种类型显示出对称的模式或转变从对不均匀的模式对称。前者在在印第安人欧亚的构造相互作用的一个早阶段的地区性的弄短期间被归因于同轴的变丑,后者与从同轴的压缩的转变有关到在让侧面的 post-collisional ASRR 期间砍的 noncoaxial 砍。LIU Junlai TANG Yuan XIA Haoran GUO Qiang TRAN My Dung CAO Shuyun WU Hujun WU Wenbin ZHANG Zhaochong ZHAO Zhidan 2010Acta Geologica Sinica(English Edition)2010,84,6:12
7Petrogenesis and tectonic implications of early Paleozoic granitoids in East Kunlun belt: Evidences from geochronology, geochemistry and isotopes显示文摘The East Kunlun Orogenic Belt(EKOB) provides an important link to reconstruct the evolution of the Proto-Tethys and Paleo-Tethys realm. The EKOB is marked by widespread Early Paleozoic magmatism.Here we report the petrology, bulk geochemistry, zircon Ue Pb dating and, Lue Hf and SreN d isotopic data of the Early Paleozoic granitic rocks in Zhiyu area of the southern EKOB. Based on the zircon U-Pb dating, these granitoids, consisting of diorite, granodiorite and monzogranite, were formed during 450 -430 Ma the Late Ordovician to Middle Silurian. The diorite and granodiorite are high Sr/Y ratio as adakitic affinities, and the monzogranite belongs to highly fractionated I-type. Their(^(87)Sr/^(86)Sr)ivalues range from 0.7059 to 0.7085, εNd(t) values from -1.6 to -6.0 and the zircon εHf(t) values show large variations from +9.1 to -8.6 with Hf model ages(T_(DM2)) about 848 Ma and 1970 Ma. The large variations of whole-rock Nd and zircon Hf isotopes demonstrate strong isotopic heterogeneity of the source regions which probably resulted from multi-phase underplating of mantle-derived magmas. Geochemical and isotopic studies proved that the diorite and granodiorite had been derived from partial melting of heterogeneous crustal source with variable contributions from ancient continental crust and juvenile components, and the monzogranites were representing fractional crystallization and crustal contamination for arc magma. The Early Paleozoic adakitic rocks and high-K calc-alkaline granitoids in the southern EKOB were likely emplaced in a continental marginal arc setting possibly linked to the southwards subduction of the Paleo Kunlun Ocean and the magma generation is linked to partial melting of thickened continental crust induced by underplating of mantle-derived magmas.Guochen Dong Mingfei Luo Xuanxue Mo Zhidan Zhao Liangqiong Dong Xuehui Yu Xin Wang Xiaowei Li Xiongfei Huang Yanbin Liu 2018Geoscience Frontiers2018,9,5:10
8Ferrites boosting photocatalytic hydrogen evolution over graphitic carbon nitride: a case study of(Co, Ni)Fe_2O_4 modification显示文摘The charge carrier separation and surface catalytic redox reactions are of primary importance as elementary steps in photocatalytic hydrogen evolution. In this study, both of these two processes in photocatalytic hydrogen evolution over graphitic carbon nitride(g-C_3N_4) were greatly promoted with the earth-abundant ferrites(Co,Ni)Fe_2O_4modification. Co Fe_2O_4 was further demonstrated to be a better modifier for g-C_3N_4 as compared to Ni Fe_2O_4,due to the more efficient charge carrier transfer as well as superior surface oxidative catalytic activity. When together loading Co Fe_2O_4 and reductive hydrogen production electrocatalyst Pt onto g-C_3N_4, the obtained Pt/g-C_3N_4/Co Fe_2O_4 photocatalyst achieved visible-light(λ>420 nm) hydrogen production rate 3.5 times as high as Pt/g-C_3N_4, with the apparent quantum yield reaching 3.35 % at 420 nm.Jie Chen Daming Zhao Zhidan Diao Miao Wang Shaohua Shen 2016Science Bulletin2016,61,4:10
9^(40)Ar/^(39)Ar dating for Cenozoic kamafugite from western Qinling in Gansu Province显示文摘40Ar/39Ar ages were determined for 6 phlogopite samples from a kamafugite pipe occurring in western Qinling, yielding a time span of 22 to 23 Ma for kamafugite eruption. Together with known geochronological data for the Qinghai-Tibet Plateau (QTP) and its peripheral regions, it is concluded that these Cenozoic potassic-ultrapotassic volcanic rocks are products of post-collisional volcanism. The age of the Cenozoic volcanic rocks in western Qinling partly overlaps that of potassic volcanics from the Gandise belt, reflecting the northward migration of the post-collisional volcanism in QTP. The age data not only confirm the temporal and spatial migration of post-collisional volcanism in QTP, but also provide geochronological constraints on the geodynamic set- ting at depth and the regimes of the tectonic evolution since Neogene in western Qinling regions.YU Xuehui ZHAO Zhidan ZHOU Su MO Xuanxue ZHU Deqing WANG Yonglei 2006Chinese Science Bulletin2006,51,13:7
10Porphyry mineralization in the Tethyan orogen显示文摘The Tethyan metallogenic domain(TMD),as one of the three major domains in the world,extends over 10000 km from east to west,and has developed several world-class metallogenic belts,such as the Gangdese porphyry Cu belt,the Sanjiang metallogenic belt,the Iran porphyry Cu belt,the Pakistan porphyry Cu belt,the southeastern European epithermal gold deposit belt,and the Southeast Asian Sn belt.The formation and evolution of the TMD is mainly controlled by the multi-stage subduction of Tethys oceanic slabs,the opening and closing of several small ocean basins,and continent-continent collision.The Tethys oceans include the Proto-Tethys(Cambrian-Silurian),Paleo-Tethys(Carbonaceous-Triassic)and Neo-Tethys(Jurassic to Cretaceous),which in turn are formed by rifting from the Gondwana land at different times in different micro-continents.With a series of geological processes such as oceanic opening and closing,continental collision and post-collisional reworking with intraplate deformation,various types of ore deposits are developed in the TMD,including porphyry deposits,epithermal deposits,VMS deposits,chromite deposits,Sn deposits and orogenic gold deposits.The metallogenic processes of the TMD can be categorized into three stages.(1)Oceanic subduction:With the subduction of the oceanic slab and dehydration of basalt and sediments,the asthenospheric mantle was metasomatized with preliminary enrichment in metals under oxidized condition.(2)Continental subduction:Continental collision induced partial melting of the mantle wedge enriched the metals and water in mafic melts,which ascended from subarc depths to the lower crust,locally to the shallow crust for hydrothermal mineralization.(3)Post-collisional reworking:Partial melting of the mafic intrusives in the lower crust produced felsic melts under oxidized and water-rich conditions,which underwent crystal fractionation and transferred water and metals into hydrothermal fluids for mineralization.The large-scale porphyry mineralization in the TMD mainly occurs in the Miocene,which is an important scientific issue worthy of further study in the future.How is the metal enriched in the processes of gradual maturity of the crust,and how does large-scale mineralization occur in a collisional orogen where there is no subduction and dehydration of oceanic slabs anymore to supply S and Cl?These are still important questions in the study of porphyry mineralization in the Tethyan orogen.The application of hyperspectral and mineralogical studies of alteration assemblages is beneficial for prospecting and exploration in the TMD.Rui Wang Dicheng Zhu Qing Wang Zengqian Hou Zhiming Yang Zhidan Zhao Xuanxue Mo 2020Science China Earth Sciences2020,63,12:5
11Experimental study on electrical conductivity of dunite at high temperature and pressure——The evidence of electrical conductivity of cold mantle in the Gaize-Lugu area显示文摘The electrical conductivities of the dunite from the Qinghai-Xizang (Tibetan) Plateau were measured with the impedance spectra method at 1.0-4.0 GPa and 643-1093 K. The experimental results indicated that activation enthalpies of the dunite are smaller than 0.9 eV, the conduction mechanism in dunite may be attributed to the mixed electrical conduction involving grain interiors and boundaries. On the basis of the results of this experiment, we can deduce that there exists cold mantle in the area of Gaize-Lugu in the Qinghai-Xizang (Tibetan) Plateau by reverse methods from the magnetotelluric sounding data (conductivity-depths profile) available for western Tibet. The result provides the present cold mantle viewpoint with strong proof on the basis of high temperature and pressure experiments.WANG Duojun LI Heping LIU Congqiang ZHAO Zhidan MO Xuanxue GUO Tieying SU Gengli DING Dongye 2001Chinese Science Bulletin2001,46,24:5
12The effect of phase transition on the compressional wave velocity for a trachybasalt at high temperature and high pressure显示文摘Compressional wave velocities in a trachybasalt, from Yichuan County, Henan Province, have been measured at 2.0 GPa and up to 1 350℃ in a YJ-3000 t cubic-anvil highpressure apparatus. The run products have been gained at the same pressure but different temperatures. The observation of the thin sections of the run products indicates that, corresponding to the variation of the compressional wave velocity in the trachybasalt, the phase transition has taken place. The relationship between the change of the compressional wave velocity and the hydrous mineral dehydration, solid-solid phase transformation and partial melting has been discussed. The experimental data presented here are of great importance to elucidating the geological process in the earth’s interior.Wenge Zhou Hongsen Xie Zhidan Zhao Weiguo Zhu Jie Guo Ji’an Xu 1999Chinese Science Bulletin1999,44,15:5
13Compressional Wave Velocities in Some Volcanic Rocks at Pressure up to 4.5 GPa显示文摘INTRODUCTIONThecompressionalwavevelocity(vp)inrockmeasuredathighpressureandhightemperatureisofsignificantimpor-tancetoelucida...Zhou Wenge Zhao Zhidan Xie Hongsen Li Yuwen Guo Jie Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550002 Xu Ji ’an Institute of Earth Sciences, Academia Sinica, Nankang PO Box1 55, Taipei, Taiwan 115 1998Journal of Earth Science1998,17,2:3
14Activation of the cold-sensing TRPM8 channel triggers UCP1-dependent thermogenesis and prevents obesity显示文摘Brown adipose tissue(BAT)is an energy-expending organ that produces heat.Expansion or activation of BAT prevents obesity and diabetes.Chronic cold exposure enhances thermogenesis in BAT through uncoupling protein 1(UCP1)activation triggered via a b-adrenergic pathway.Here,we report that the cold-sensing transient receptor potential melastatin 8(TRPM8)is functionally present in mouse BAT.Challenging brown adipocytes with menthol,a TRPM8 agonist,up-regulates UCP1 expression and requires protein kinase A activation.Upon mimicking long-term cold exposure with chronic dietary menthol application,menthol significantly increased the core temperatures and locomotor activity in wild-type mice;these effects were absent in both TRPM82/2 and UCP12/2 mice.Dietary obesity and glucose abnormalities were also prevented by menthol treatment.Our results reveal a previously unrecognized role for TRPM8,suggesting that stimulation of this channel mediates BAT thermogenesis,which could constitute a promising way to treat obesity.Shuangtao Ma Hao Yu Zhigang Zhao Zhidan Luo Jing Chen Yinxing Ni Rongbing Jin Liqun Ma Peijian Wang Zhenyu Zhu Li Li Jian Zhong Daoyan Liu Bernd Nilius Zhiming Zhu 2012Journal of Molecular Cell Biology2012,4,2:2
15Integrated single-cell RNA sequencing analysis reveals distinct cellular and transcriptional modules associated with survival in lung cancer显示文摘Lung adenocarcinoma(LUAD)and squamous carcinoma(LUSC)are two major subtypes of non-small cell lung cancer with distinct pathologic features and treatment paradigms.The heterogeneity can be attributed to genetic,transcriptional,and epigenetic parameters.Here,we established a multi-omics atlas,integrating 52 single-cell RNA sequencing and 2342 public bulk RNA sequencing.We investigated their differences in genetic amplification,cellular compositions,and expression modules.We revealed that LUAD and LUSC contained amplifications occurring selectively in subclusters of AT2 and basal cells,and had distinct cellular composition modules associated with poor survival of lung cancer.Malignant and stage-specific gene analyses further uncovered critical transcription factors and genes in tumor progression.Moreover,we identified subclusters with proliferating and differentiating properties in AT2 and basal cells.Overexpression assays of ten genes,including sub-cluster markers AQP5 and KPNA2,further indicated their functional roles,providing potential targets for early diagnosis and treatment in lung cancer.Li Zhang Yiming Zhang Chengdi Wang Ying Yang Yinyun Ni Zhoufeng Wang Tingting Song Menglin Yao Zhiqiang Liu Ningning Chao Yongfeng Yang Jun Shao Zhidan Li Ran Zhou Li Chen Dan Zhang Yuancun Zhao Wei Liu Yupeng Li Ping He Jing-wen Lin Yuan Wang Kang Zhang Lu Chen Weimin Li 2022Signal Transduction and Targeted Therapy2022,7,2:2
16Contribution of syncollisional felsic magmatism to continental crust growth: A case study of the Paleogene Linzizong volcanic Succession in southern Tibet显示文摘Xuanxue Mo Yaoling Niu Guochen Dong Zhidan Zhao Zengqian Hou Su Zhou Shan Ke 2008Chemical Geology2008,,1:2
17Mechanical property and microstructure of aluminum alloy-steel tubes joint by magnetic pulse welding显示文摘Haiping Yu Zhidan Xu Zhisong Fan Zhixue Zhao Chunfeng Li 2013Materials Science & Engineering A2013,,:2
18Mantle contributions to crustal thickening during continental collision: Evidence from Cenozoic igneous rocks in southern Tibet显示文摘Xuanxue Mo Zengqian Hou Yaoling Niu Guochen Dong Xiaoming Qu Zhidan Zhao Zhiming Yang 2006LITHOS2006,,1:2
19Five Developed Cylinder Reticulated Shell ANSYS Parametric Modelings显示文摘Lu Xiaoyang Wang Zhidan Zhao Xiaowei 0,,:1
20Ultrafine polycrystalline titania nanofibers for superior sodium storage显示文摘Sodium ion batteries have a huge potential for large-scale energy storage for the low cost and abundance of sodium resources. In this work, a novel structure of ultrafine polycrystalline TiO2 nanofibers is prepared on nickel foam/carbon cloth by a simple vapor deposition method. The as-prepared TiO2 nanofibers show excellent performance when used as anodes for sodium-ion batteries. Specifically, the TiO2 nanofibers@nickel foam electrode delivers a high reversible capacity of 263.2 m Ahg^-1 at 0.2 C and maintains a considerable capacity of 144.2 m Ahg^-1 at 10 C. The TiO2 nanofibers@carbon cloth electrode also shows excellent high-rate capability, sustaining a capacity of 148 m Ahg^-1 after 20 0 0 cycles at 10 C. It is believed that the novel nanofibrous structure increases the contact area with the electrolyte and greatly shortens the sodium ion diffusion distance, and meanwhile, the polycrystalline nature of nanofibers exposes more intercalation sites for sodium storage. Furthermore, the density functional theory calculations exhibit strong ionic interactions between the exposed TiO2(101) facets and sodium ions, leading to a preferable sodiation/desodiation process. The unique structural features endow the TiO2 nanofibers electrodes great advantages in rapid sodium storage with an outstanding high-rate capability.Zhidan Diao Daming Zhao Chunxiao Lv Hongli Liu Dongjiang Yang Shaohua Shen 2019Journal of Energy Chemistry2019,28,11:1
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