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Multi boron-doping effects in hard carbon toward enhanced sodium ion storage

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Journal of Energy Chemistry 2025年第1期100卷 730-738页

作者： Peng Zheng Wang Zhou Ying Mo Biao Zheng Miaomiao Han Qin Zhong Wenwen Yang Peng Gao Lezhi Yang Jilei Liu College of Materials Science and Engineering Hunan Joint International Laboratory of Advanced Materials and Technology for Clean Energy Hunan Province Key Laboratory for Advanced Carbon Materials and Applied Technology Hunan University Greater Bay Area institute for Innovation Hunan University changsha research institute of Mining & Metallurgy Co. LTD.

Hard carbon （HC） has been considered as promising anode material for sodium-ion batteries （SIBs）.The optimization of hard carbon’s microstructure and solid electrolyte interface （SEI） property are demonstrated effective in enhancing the Na+storage capability,however,a one-step regulation strategy to achieve simultaneous multi-scale structures optimization is highly ***,we have systematically investigated the effects of boron doping on hard carbon’s microstructure and interface chemistry.A variety of structure characterizations show that appropriate amount of boron doping can increase the size of closed pores via rearrangement of carbon layers with improved graphitization degree,which provides more Na+storage ***-situ Fourier transform infrared spectroscopy/electrochemical impedance spectroscopy （FTIR/EIS） and X-ray photoelectron spectroscopy （XPS） analysis demonstrate the presence of more BC3and less B–C–O structures that result in enhanced ion diffusion kinetics and the formation of inorganic rich and robust SEI,which leads to facilitated charge transfer and excellent rate *** a result,the hard carbon anode with optimized boron doping content exhibits enhanced rate and cycling *** general,this work unravels the critical role of boron doping in optimizing the pore structure,interface chemistry and diffusion kinetics of hard carbon,which enables rational design of sodium-ion battery anode with enhanced Na+storage performance.

关键词： X ray photoelectron spectroscopy

Geochemistry,geochronology,and zircon Hf isotopic compositions of felsite porphyry in Xiangshan uranium orefield and its geological implication

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Acta Geochimica 2021年第5期40卷 773-786页

作者： Mingming Tian Ziying Li Jiangtao Nie Jun Zhong Jian Wang Jianhui Cao Beijing research institute of uranium geology Beijing 100029China

Recently,a new kind of volcanic rock,felsite porphyry,has been revealed by drilling in Xiangshan area,Jiangxi Province,*** better understand petrogenesis and magmatic evolution sequence of the Xiangshan volcanic-intrusive complex,we studied systematic petrology,geochemistry,LA-ICP-MS zircon U–Pb dating,and Hf isotope results of the felsite *** show that the felsite porphyry has similar geochemical characteristics to the porphyroclastic rhyolite,which is the predominant lithology of Xiangshan uranium *** porphyry and porphyroclastic rhyolite have high SiO2,Al2O3,and K2O contents,low Na2O,and MgO contents,and slightly negative Eu ***,these rocks are relatively depleted in large ion lithophile elements(K,Ba,and Sr)and are enriched in high field strength elements(Th,Zr,and Hf).LA-ICP-MS zircon U–Pb dating of the felsite porphyry yielded a crystallization age of 132.2±0.9 Ma,which is coeval to that of the porphyroclastic *** ages signified that Xiangshan volcanic-intrusive complex formed in the Early Cretaceous,during which the entire South China was in the back-arc extension tectonic setting related to the subduction of the Pacific Plate under the Euroasian ***-situ zircon Hf isotope data on a felsite porphyry sample show eHf(t)values from-8.82 to-5.11,while the Hf isotope two-stage model age(TDM2-Hf)ranges from 1513 to 1747 *** with petrological,mineralogical,geochemistry,and geochronology results of the felsite porphyry,it is concluded that the felsite porphyry in Xiangshan might be originated from the partial melting of the Mesoproterozoic ancient metamorphic rocks,with possible input of small amounts of mantle materials.

关键词： Petrogeochemistry LA-ICP-MS zircon U-Pb age Hf isotope Felsite porphyry Xiangshan uranium orefield

Outline of uranium Resources Characteristics and Metallogenetic Regularity in China

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Acta Geologica Sinica(English Edition) 2015年第3期89卷 918-937页

作者： CAI Yuqi ZHANG Jindai LI Ziying GUO Qingyin SONG Jiye FAN Honghai LIU Wusheng QI Fucheng ZHANG Minglin Key Laboratory of uranium Resource Exploration and Evaluation Technology Beijing Research Institute of Uranium GeologyCNNC China Nuclear geology Bureau

uranium,as one of twenty-six kinds of important minerals in China,is strategic resource and energy mineral,which has been thoroughly investigated in the project of National Potential Evaluation of uranium *** the implementation of this project,the authors summarized the metallogenic regularity of uranium resource in China systematically,through the researches of geological characteristics of uranium resource,uranium deposits type（genetic and prediction type）,temporal and spatial distribution,and metallogenic *** on the investigation of present situation and progress in uranium exploration,this paper proposes the uranium deposits in China should be divided into 4 classes,9 types,21 subtypes in genetic,and 50 types in prediction;suggests to divide China into 29 uranium metallogenic belts and 20 uranium prospective area,and constructs 20uranium-polymetallic metallogenic series,through summarizing temporal and spatial distribution characteristics and metallogenic regularity of uranium deposits in *** above research is beneficial to the comprehensive understanding of regional uranium metallogenic regularity,and will direct the uranium exploration in the future.

关键词： uranium deposit uranium deposit type uranium metallogenic regularity uraniummetallogenic belt uranium metallogenic series

Selection and Basic Properties of the Buffer Material for High-Level Radioactive Waste Repository in China

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Acta Geologica Sinica(English Edition) 2008年第5期82卷 1050-1055页

作者： WEN Zhijin Beijing research institute of uranium geology Beijing 100029

Radioactive wastes arising from a wide range of human activities are in many different physical and chemical forms, contaminated with varying radioactivity. Their common features are the potential hazard associated with their radioactivity and the need to manage them in such a way as to protect the human environment. The geological disposal is regarded as the most reasonable and effective way to safely disposing high-level radioactive wastes in the world. The conceptual model of geological disposal in China is based on a multi-barrier system that combines an isolating geological environment with an engineered barrier system. The buffer is one of the main engineered barriers for HLW repository. It is expected to maintain its low water permeability, self-sealing property, radio nuclides adsorption and retardation properties, thermal conductivity, chemical buffering property, canister supporting property, and stress buffering property over a long period of time. Bentonite is selected as the main content of buffer material that can satisfy the above requirements. The Gaomiaozi deposit is selected as the candidate supplier for China＇s buffer material of high level radioactive waste repository. This paper presents the geological features of the GMZ deposit and basic properties of the GMZ Na-bentonite. It is a super-large deposit with a high content of montmorillonite （about 75 %）, and GMZ-1, which is Na-bentonite produced from GMZ deposit is selected as the reference material for China＇s buffer material study.

关键词： Gaomiaozi Na-bentonite buffer material basic property nuclear waste disposal

Early Mineralization Age of the Hengjian uranium Deposit: Constraints from Zircon SIMS U-Pb Dating

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Acta Geologica Sinica(English Edition) 2020年第1期94卷 212-213页

作者： HE Sheng LI Ziying GUO Dongfa WANG Yongjian ZHANG Chuang GUO Jian FAN Zengwei Beijing research institute of uranium geology Beijing 100029China

Objective The Hengjian uranium deposit is a typical hydrothermal deposit in the Xiangshan uranium ore *** uranium mineralization ages of the Xiangshan deposits are poorly constrained,and only a few mineralization ages using the pitchblende U–Pb method have been *** ages are commonly discordant and dispersed for abundant inclusions and an open U–Pb *** grains after strong hydrothermal alteration are usually characterized by high common Pb contents,and their U–Pb isochron ages recorded the hydrothermal alteration event without interference of common Pb *** Hengjian gray/grayish-green granite porphyry experienced strong alteration by hydrothermal fluids during the pervasive uranium mineralization in the Xiangshan uranium ore *** mineralization in the Hengjian deposit may had different stages,and strong hydromicatization alteration occurred at a relatively early *** altered zircon U–Pb isochron ages possibly represent relatively early mineralization age of the Xiangshan uranium *** zircon grains from the Hengjian granite porphyry were analyzed using the secondary ion mass spectrometry(SIMS)U-Pb method in this study,and U–Pb isochron ages were measured to constrain the relatively early mineralization age of the Hengjian uranium deposit.

关键词： Constraints from Zircon SIMS U-Pb Dating Early Mineralization Age of the Hengjian uranium Deposit

The Discovery of Natural Native uranium and Its Significance

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Acta Geologica Sinica(English Edition) 2015年第5期89卷 1561-1567页

作者： LI Ziying HUANG Zhizhang LI Xiuzhen GUO Jian FAN Chou Beijing research institute of uranium geology South-Central University for Nationalities

This study analyzed the composition and uranium valence of pitchblendes sampled from the hydrothermal Guidong and Zhuguang uranium deposits of the middle Nanling metallogenic belt, Southern China using X-ray photoelectron spectroscopy（XPS）.A revolutionary discovery is that the uranium not only exists in the forms of tetravalent and hexavalent uranium oxides, but also occurs in the form of native *** is the first discovery of the existence of native uranium in *** greatly helps to reveal the origin of hydrothermal mineralization of uranium, and also has great significance for studying the thermal energy, formation and evolution of the earth.

关键词： pitchblende uranium deposit native uranium first discovery metallogenic origin

Elemental Geochemistry of the Interlayer Oxidation Zonein the Shihongtan Sandstone Type uranium Deposit, Xinjiang

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Acta Geologica Sinica(English Edition) 2005年第6期79卷 835-842页

作者： CAI Genqing ZHANG Zimin LI Shengxiang Beijing research institute of uranium geology Beijing 100029

According to the oxidation intensity of ore-hosting sandstone, the interlayer oxidation zone of the Shihongtan sandstone-type uranium deposit in the Turpan-Hami basin can be divided into 4 geochemical subzones, namely, intenselyoxidized, weakly-oxidized, redox and unoxidized primary subzones. The elemental geochemical characteristics of the four subzones have been studied in detail, and the results show that U, together with other elements such as Re, Mo, Se, Sr, S, REE, Corganic etc., is enriched in the redox subzone. Re and U have similar geochemical properties in the reductionoxidation process. The geochemical properties of Mo and Se are similar to those of U in the reduction condition, but different from those of U in the oxidation condition. It is proposed that the ore-hosting layers can provide a curtain mount of uranium for uranium mineralization.

关键词： sandstone-type uranium deposit interlayer oxidation zone geochemical subzone Shihongtan uranium deposit

research on the Application of the Light-Energy Spectrum Fusion Technique to Land and Resources Survey

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Acta Geologica Sinica(English Edition) 2000年第2期74卷 381-383页

作者： ZHAO Yingjun LIU Dechang Beijing research institute of uranium geology Beijing 100029

This paper introduces how to use remote sensing images including Landsat (MSS and TM) and airborne radioactivity images to identify the type of rocks in the areas covered by vegetation. The relationship between light spectrum (Landsat MSS and TM) and energy spectrum (U, Th and K) is discussed on the basis of correlation analysis, and it is proven that there are correlations between the Landsat MSS or TM data and the U, Th and K data. By using the fusion technique, new images were generated, which contain both the light spectrum and the energy spectrum information.

关键词： light-energy spectrum fusion technique lithologic identification

DECOLLEMENT STRUCTURE AND METALLOGENIC PROGNOSIS FOR BURIED uranium DEPOSITS OF EAST HUNAN AND ITS ADJACENT AREA,CHINA

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Geotectonica et Metallogenia 1996年第Z1期20卷 112-113页

作者： FangShiyi FanShaoyun LiYouwei JianXunpingandChaoXiaolin changsha Uranium Geology Research InstituteCNNCChangshaChina

East Hunan and its adjacent area is defined as an intraplate orogenic zone with help of new theory of geology and multi-discipline research. The evolutionary stages, deep structrue, geological feature, rotation strain and metallogeny of NW-striking transfer fault zone are also discussed. NE-trending strike-slip fault zone, as a whole, entered action during Pacific movement and underwent 3 stages: the strike-slip shear, the pull-apart extension and the’ compressive thrust. The aurthors studied macro-and microscopic features of strike-slip fault and its control of uranium mineralization at Jinguangchung deposit by means of modern structure analysis, micro-submicroscopic investigation and geophysical measurement.

关键词： Nd DECOLLEMENT STRUCTURE AND METALLOGENIC PROGNOSIS FOR BURIED uranium DEPOSITS OF EAST HUNAN AND ITS ADJACENT AREA,CHINA