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钻铤偏心对随钻四极子横波测井影响:理论与实例分析

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地球物理学报 2023年第1期66卷 111-121页

作者：饶博苏远大李盛清孙云涛陈文轩唐晓明中国石油大学(华东)深层油气重点实验室青岛266580 崂山实验室海洋矿产资源评价与探测技术功能实验室青岛266071 中国科学院地质与地球物理研究所北京100029

随钻四极子声波测井技术主要用于测量地层的横波速度.但在复杂旋转钻进过程中钻具的偏心会对测量的四极子波形质量及横波速度产生不利影响.本文建立以钻铤和井孔分别为基准的双柱坐标系偏心随钻声波测井模型,利用贝塞尔函数的平移加法... 详细信息

随钻四极子声波测井技术主要用于测量地层的横波速度.但在复杂旋转钻进过程中钻具的偏心会对测量的四极子波形质量及横波速度产生不利影响.本文建立以钻铤和井孔分别为基准的双柱坐标系偏心随钻声波测井模型,利用贝塞尔函数的平移加法定理构建边界条件和井中响应函数,数值模拟了钻铤居中和偏心时四极子声源激发的声场.发现偏心后的随钻四极子声场中除地层四极子波外,还有单极斯通利波和偶极弯曲波的多阶模式波共存且相互耦合,尤其是在软地层钻铤严重偏心时四极子模式波受斯通利波模式和弯曲波模式干扰更为严重,不利于地层横波速度的测量.现场随钻四极子声波测井仪器实验样机在居中和偏心的状态下实测的数据表明:当随钻四极子样机居中测井时,可测量到高质量的四极子波形,处理得到相关性较强的地层横波时差,与单极测量横波时差吻合较好;但钻铤偏心测量时采集的波形成分复杂,偏心引起的低频斯通利波模式对地层四极子模式的耦合干扰非常严重,导致地层横波时差的相关性很差,测量值介于横波与斯通利波时差之间,与实测单极横波时差差异很大甚至无法使用,尤其在疏松软地层中影响更为突出.本文从偏心随钻四极子井孔声场理论出发,结合现场实测数据,重点分析钻铤偏心对四极子横波测井的影响,为指导偏心状态下随钻四极子横波时差处理与校正方法提供理论基础.

关键词：随钻声波测井四极子仪器偏心横波速度

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Boosting the performance of liNi_(0.90)Co_(0.06)Mn_(0.04)O_(2) electrode by uniform li_(3)PO_(4) coating via atomic layer deposition

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Chinese Chemical Letters 2024年第5期35卷 499-503页

作者： Mingjiao Lu Zhixing Wang Gui Luo Huajun Guo Xinhai li Guochun Yan Qihou li Xianglin li Ding Wang Jiexi Wang School of Metallurgy and Environment Central South UniversityChangsha 410083China BASF ShanShan Battery Materials Co. Ltd.Changsha 410006China Engineering Research Center of the Ministry of Education for Advanced Battery Materials Central South UniversityChangsha 410083China Hunan Provincial Key Laboratory of Nonferrous Value-Added Metallurgy Central South UniversityChangsha 410083China School of Physics and Chemistry Hunan First Normal UniversityChangsha 410205China National and Local Joint Engineering Laboratory for lithium-ion Batteries and Materials Preparation Technology Key Laboratory of Advanced Battery Materials of Yunnan ProvinceFaculty of Metallurgical and Energy EngineeringKunming University of Science and TechnologyKunming 650093China

Ultra-high nickel material is considered to be a promising cathode ***,with the increase of nickel content,the interfacial side reactions between the cathode and electrolyte become increasingly ***,an atomically controllable ionic conductor li_(3)PO_(4)(LPO)coating is deposited on the liNi_(0.90)Co_(0.06)Mn_(0.04)O_(2)(NCM9064)based electrode by the atomic layer deposition *** results shows that the LPO coating is uniformly and densely covered on the surface of secondary particles of NCM9064,helping to prevent the direct contact between the electrolyte and cathode during the chargingdischarging *** addition,the coating layer is electrochemically *** a result,the interfacial side reactions during the long cycle are effectively suppressed,and the solid electrolyte interphase layer at the interface is *** electrode with 20 layers of LPO deposition(ALD-LPO-20)exhibits an excellent capacity retention of 81%after 200 cycles in 2.8-4.3 V at 25℃,which is 18%higher than the unmodified material(ALD-LPO-0).Besides,the moderate LPO coating improves the rate capability and high temperature cycling performance of *** study provides a method for the modification of ultra-high nickel cathode materials and corresponding electrodes.

关键词： Ultra-high nickel material liNi_(0.90)Co_(0.06)Mn_(0.04)O_(2) Atomic layer deposition li_(3)PO_(4) Ionic conductor

交联羧甲基魔芋葡甘聚糖对Fe(Ⅲ)和Cr(Ⅲ)的吸附行为研究

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离子交换与吸附 2010年第3期26卷 193-201页

作者：沈敏吕欢欢瞿阳薛爱芳李胜清陈浩华中农业大学理学院化学系

研究了交联羧甲基魔芋葡甘聚糖(Crosslinked carboxymethyl konjac glucomannan,CCMKGM)对Fe(Ⅲ)和Cr(Ⅲ)的吸附行为。用FTIR和RAMAN对吸附产物进行表征。结果表明,CCMKGM主要以配位的形式吸附Fe(Ⅲ)和Cr(Ⅲ);吸附在60min内达到平衡,遵从二级动力学方程,其中Cr(Ⅲ)较好地符合粒子内扩散模型;pH对吸附量影响较大,适宜范围为3.0～7.0;CCMKGM对Fe(Ⅲ)的吸附行为符合Langmuir方程,而对Cr(Ⅲ)的吸附行为符合Freundlich方程,其最大吸附量分别为2.7mmol/g和2.2mmol/g(298K);吸附为自发的、吸热的、熵增加过程。CCMKGM对Fe(Ⅲ)和Cr(Ⅲ)的吸附具有吸附容量大、适宜pH范围宽、再生性好等特点,有望将其作为吸附剂用于污水处理及铁和铬的形态分析。

关键词：交联羧甲基魔芋葡甘聚糖 Fe(Ⅲ) Cr(Ⅲ) 吸附机理

Layered niobium carbide enabling excellent kinetics and cycling stability of li-Mg-B-H hydrogen storage material Layered niobium carbide enabling excellent kinetics

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Rare Metals 2024年第3期43卷 1153-1166页

作者： li-Wen Lu Hui Luo Guang-Xu li Yun li Xin-Hua Wang Cun-Ke Huang Zhi-QiangLan Wen-Zheng Zhou Jin Guo Mohammad Ismail Hai-Zhen liu Guangxi Novel Battery Materials Research Center of Engineering Technology Guangxi Colleges and Universities Key Laboratory of Blue Energy and Systems IntegrationSchool of Physical Science and TechnologyGuangxi UniversityNanning530004China State Key Laboratory of Featured Metal Materials and life-Cycle Safety for Composite Structures Nanning530004China School of Mechanical and Electrical Engineering Quzhou College of TechnologyQuzhou324000China Department of Materials Science and Engineering Zhejiang UniversityHangzhou310027China Faculty of Ocean Engineering Technology and Informatics Universiti Malaysia Terengganu21030Kuala NerusTerengganuMalaysia Key Laboratory of Advanced Energy Materials Chemistry(Ministry of Education) Nankai UniversityTianjin300071China

The li-Mg-B-H composite(2liBH_(4)+MgH_(2))has a high capacity of 11.4 wt%as a hydrogen storage ***,the slow kinetics and poor cycling stability severely restrict its practical *** this work,a layered Nb_(2)C MXene was first synthesized and then introduced to tailor the kinetics and cycling stability of the li-Mg-B-H *** milled 2liH+MgB_(2)composites were initially hydrogenated to obtain the 2liBH_(4)+MgH_(2)*** 2liBH_(4)+MgH_(2)+5wt%Nb_(2)C can release 9.0 wt%H_(2)in 30 min at 400℃,while it is only 2.7 wt%for the undoped 2liBH_(4)+MgH_(2).The dehydrogenation activation energies of MgH_(2)and liBH_(4)are 123 and 154 kJ·mol^(-1)respectively for the 5 wt%Nb_(2)C-doped composite,lower than the undoped composite(164 and 165 kJ·mol^(-1)).The 2liBH_(4)+MgH_(2)+5 wt%Nb_(2)C possesses excellent cycling stability,with the reversible capacity only slightly reduced from 9.4 wt%for the 1st cycle to 9.3 wt%for the 20th ***_(2)C keeps stable in the composite and acts as an efficient catalyst for the li-Mg-B-H *** is believed that both the layered structure and the active Nb element contribu te to the enhanced hydrogen storage performances of the li-Mg-B-H *** work confirms that the Nb_(2)C MXene with layered stru cture has a significant enhancing impact on the li-Mg-B-H hydrogen storage materials,which is different from the bulk NbC.

关键词： Hydrogen storage lithium borohydride Magnesium hydride Nb_(2)C MXene

Hard-carbon hybrid li-ion/metal anode enabled by preferred mesoporous uniform lithium growth mechanism

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Journal of Energy Chemistry 2024年第1期88卷 252-259,I0006页

作者： Fang Yan Yan liu Yuan li Yan Wang Zicen Deng Meng li Zhenwei Zhu Aohan Zhou Ting li Jingyi Qiu Gaoping Cao Shaobo Huang Biyan Wang Hao Zhang School of Chemistry and Biological Engineering University of Science and TechnologyBeijing 100083China Research Institute of Chemical Defense Beijing 100191China College of Physics and Engineering Henan University of Science and TechnologyLuoyang 471023HenanChina National Base for International Science&Technology Cooperation School of ChemistryXiangtan UniversityXiangtan 411105HunanChina Materials and Manufacturing Department Beijing University of TechnologyBeijing 100124China

To achieve high energy density in lithium batteries,the construction of lithium-ion/metal hybrid anodes is a promising *** particular,because of the anisotropy of graphite,hybrid anode formed by graphite/li metal has low transport kinetics and is easy to causes the growth of lithium dendrites and accumulation of dead li,which seriously affects the cycle life of batteries and even causes safety ***,by comparing graphite with two types of hard carbon,it was found that hybrid anode formed by hard carbon and lithium metal,possessing more disordered mesoporous structure and lithophilic groups,presents better *** indicate that the mesoporous structure provides abundant active site and storage space for dead *** the synergistic effect of this structure and lithophilic functional groups(–COOH),the reversibility of hard carbon/lithium metal hybrid anode is maintained,promoting uniform deposition of lithium metal and alleviating formation of lithium *** hybrid anode maintains a 99.5%Coulombic efficiency(CE)after 260 cycles at a specific capacity of 500 m Ah/*** work provides new insights into the hybrid anodes formed by carbon-based materials and lithium metal with high specific energy and fast charging ability.

关键词： Hard carbon/li metal hybrid anode Mesoporous structure Surface oxygen functional group Fast charging lithium batteries

锦屏一级水电站地下厂房下游拱腰喷层裂缝成因分析

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岩石力学与工程学报 2010年第A02期29卷 3777-3784页

作者：刘建友伍法权赵振华李生清祁生文刘彤董金玉中国科学院地质与地球物理研究所北京100029 铁道部经济规划研究院北京100038 山东省地矿工程勘察院山东济南250014

雅砻江锦屏一级水电站地下厂房的监测结果显示,下游拱腰处混凝土喷层开始出现鼓出开裂现象,随后裂缝持续扩展,喷层大量剥落;同时,下游拱腰处围岩位移和锚杆应力也显著增加。经过详细的现场地质调查,并结合厂房的受力情况进行数值计算,... 详细信息

雅砻江锦屏一级水电站地下厂房的监测结果显示,下游拱腰处混凝土喷层开始出现鼓出开裂现象,随后裂缝持续扩展,喷层大量剥落;同时,下游拱腰处围岩位移和锚杆应力也显著增加。经过详细的现场地质调查,并结合厂房的受力情况进行数值计算,分析厂房下游拱腰处围岩变形破坏及混凝土喷层开裂剥落的原因。研究结果表明:高地应力和偏压作用在下游拱腰部位形成高强度的应力集中是导致该部位混凝土喷层开裂剥落的主要原因,主变室的开挖和围岩中第四组结构面的普遍发育加剧混凝土喷层的开裂和剥落。

关键词：水利工程锦屏一级水电站地下厂房混凝土喷层开裂和剥落高地应力

Catalytic anode surface enabling in situ polymerization of gel polymer electrolyte for stable li metal batteries

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Nano Research 2024年第6期17卷 5216-5223页

作者： Guocheng li Kang liang Yuanjian li Xiangrui Duan lin Fu Zhao Cai Zhaofu Zhang Jiangnan Dai Yongming Sun Wuhan National Laboratory for Optoelectronics Huazhong University of Science and TechnologyWuhan 430074China The Institute of Technological Sciences Wuhan UniversityWuhan 430074China Faculty of Materials Science and Chemistry China University of Geoscience(Wuhan)Wuhan 430074China

Employing quasi-solid-state gel polymer electrolyte(GPE)instead of the liquid counterpart has been regarded as a promising strategy for improving the electrochemical performance of li metal ***,the poor and uneven interfacial contact between li metal anode and GPE could cause large interfacial resistance and electrochemical li stripping/plating inhomogeneity,deteriorating the electrochemical ***,we proposed that the functional component of composite anode could work as the catalyst to promote the in situ polymerization reaction,and we experimentally realized the integration of polymerized-dioxolane electrolyte and li/li_(22)Sn_(5)/liF composite electrode with low interfacial resistance and good stability by in situ catalyzation ***,the reaction kinetics and stability of metallic li anode were significantly *** a demonstration,symmetric cell using such a GPE-li/li_(22)Sn_(5)/liF integration achieved stable cycling beyond 250 cycles with small potential hysteresis of 25 mV at 1 mA·cm^(−2)and 1 mAh·cm^(−2),far outperforming the counterpart regular GPE on pure *** with liNi0.5Co0.3Mn0.2O2,the full cell with the GPE-li/li_(22)Sn_(5)/liF integration maintained 85.7%of the original capacity after 100 cycles at 0.5 C(1 C=200 mA·g^(−1)).Our research provides a promising strategy for reducing the resistance between GPE and li metal anode,and realizes li metal batteries with enhance electrochemical performance.

关键词： catalyzation polymerization interface resistance interfacial stability li metal batteries electrochemical performance

Enhanced electrochemical performance of li_(1.3)Al_(0.3)Ti_(1.7)(PO_(4))_(3) solid electrolyte by anion doping

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Nano Research 2024年第3期17卷 1465-1472页

作者： Jingrui Kang Xu Guo Rui Gu Honglei Hao Yi Tang Jiahui Wang li Jin Hongfei li Xiaoyong Wei Electronic Materials Research Laboratory Key Laboratory of the Ministry of Education&International Center for Dielectric ResearchSchool of Electronic and Information EngineeringXi’an Jiaotong UniversityXi’an 710049China School of Energy and Materials Shanghai Key Laboratory of Engineering Materials Application and EvaluationShanghai Polytechnic UniversityShanghai 201209China

Nowadays,the majority of the studies on the substitution are focused on cations(such as Y^(3+),Ti^(4+),P^(5+),etc.)in li_(1.3)Al_(0.3)Ti_(1.7)(PO_(4))_(3)(LATP),while there are few studies on the substitution of anion O^(2-).In this work,the modified LATP with a series of liCl(LATPClx,x=0.1,0.2,0.3,0.4)additives is prepared to enhance ionic *** successful introduction of Cl-makes the length of the c axis decrease from 20.822(2)to 20.792(1)Å,and the bulk conductivity of 2.13×10^(-3) S·cm^(-1) is achieved in LATPCl_(0.3).Moreover,the Al/Ti-O1/Cl1 and Al/Ti-O_(2)/Cl_(2) distance decrease,while the li1-O_(2)/Cl_(2) distance *** ions migrate more easily in the nanochannel of *** addition,the liCl additive increases the relative density and the grain boundary conductivity of LATPClx ***,a higher ionic conductivity of 2.12×10^(–4) S·cm^(-1) and a low activation energy of 0.30 eV are obtained in LATPCl_(0.3).Correspondingly,the symmetric cell exhibits a low overpotential of±50 mV for over 200 h in LATPCl_(0.3).The solid-state li|LATPCl_(0.3)|NCM811(NCM811=liNi0.8Co0.1Mn0.1O_(2))battery exhibits high initial capacity 185.1 mAh·g^(-1) with a capacity retention rate of 95.4%after 100 cycles at 0.5 *** result suggests that liCl additive is an effective strategy to promote electrochemical properties of LATP solid electrolyte and can be considered for reference to other inorganic solid electrolytes systems.

关键词： li_(1.3)Al_(0.3)Ti_(1.7)(PO_(4))_(3)(LATP)solid electrolyte anion doping ionic conductivity cyclic performance

塔北深层海相碳酸盐岩断溶体成藏认识及油藏特征

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地学前缘 2023年第4期30卷 43-50页

作者：杨德彬鲁新便高志前曹飞汪彦鲍典李生青中国地质大学(北京)能源学院北京100083 中国石油化工股份有限公司西北油田分公司新疆乌鲁木齐830011

根据塔北地区海相碳酸盐岩油藏勘探开发实践,基于对断裂破碎作用、岩溶作用及溶蚀断裂带的控储、控藏特征研究,创新提出的“断溶体”圈闭(油藏)概念,业已成为碳酸盐岩油气勘探开发的新目标、新类型,丰富了海相碳酸盐岩油气藏理论认识。... 详细信息

根据塔北地区海相碳酸盐岩油藏勘探开发实践,基于对断裂破碎作用、岩溶作用及溶蚀断裂带的控储、控藏特征研究,创新提出的“断溶体”圈闭(油藏)概念,业已成为碳酸盐岩油气勘探开发的新目标、新类型,丰富了海相碳酸盐岩油气藏理论认识。断溶体油藏宏观上具有“断溶控储、深断控藏、物性圈闭、垂向疏导、复式聚集、分段成藏”的成藏特征。断溶体油气藏沿断裂破碎带呈条带状分布,其宏观展布不受局部构造控制,油气藏无统一油水界面。基于以上地质条件的耦合,受断裂带结构特征差异的影响,同一断裂带的不同段,其富集、含水及连通特征具有明显差异,具有“一断裂段一单元,一单元一油藏”的特征,与传统的碳酸盐岩构造型、复合型等油藏类型具有显著差别。针对不同的断溶体油藏特征,需有针对性地制定开发治理对策。国内外油气田开发实践证实,包括碳酸盐岩、白云岩和砂岩在内的多种岩性地层中,均发育规模不等的断裂带、裂缝带,重视和深化研究深层海相碳酸盐岩断溶体圈闭(油藏)对油气勘探开发具有重要意义。

关键词：成藏认识油藏特征深层海相断溶体油藏碳酸盐岩塔里木盆地