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Eliminating H_(2)O/HF and regulating interphase with bifunctional tolylene-2,4-diisocyanate(TDI)additive for long life Li-ion battery

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Journal of Energy Chemistry 2024年第8期95卷 519-528,I0011页

作者： Xueyi Zeng Xiang Gao Peiqi Zhou Haijia Li Xin He Weizhen fan chaojun fan Tianxiang Yang Zhen Ma Xiaoyang Zhao Junmin Nan School of Chemistry South China Normal UniversityGuangzhou 510006GuangdongChina Guangzhou Tinci Materials Technology Co.Ltd. Guangzhou 510760GuangdongChina School of Environmental Engineering and Chemistry Luoyang Institute of Science and TechnologyLuoyang 471023HenanChina School of Geomatic and Environmental Engineering Henan Polytechnic InstituteNanyang 473000HenanChina

Lithium-ion batteries(LIBs)featuring a Ni-rich cathode exhibit increased specific capacity,but the establishment of a stable interphase through the implementation of a functional electrolyte strategy remains *** when the battery is operated under high temperature,the trace water present in the electrolyte will accelerate the hydrolysis of the electrolyte and the resulting HF will further erode the *** order to enhance the long-term cycling performance of graphite/LiNi_(0.8)Co_(0.1)Mn_(0.1)O_(2)(NCM811)LIBs,herein,Tolylene-2,4-diisocyanate(TDI)additive containing lone-pair electrons is employed to formulate a novel bifunctional electrolyte aimed at eliminating H_(2)O/HF generated at elevated *** 1000 cycles at 25℃,the battery incorporating the TDI-containing electrolyte exhibits an impressive capacity retention of 94%at 1 *** contrast,the battery utilizing the blank electrolyte has a lower capacity retention of only 78%.Furthermore,after undergoing 550 cycles at 1 C under45℃,the inclusion of TDI results in a notable enhancement of capacity,increasing it from 68%to 80%.This indicates TDI has a favorable influence on the cycling performance of LIBs,especially at elevated *** analysis of the film formation mechanism suggests that the lone pair of electrons of the isocyanate group in TDI play a crucial role in inhibiting the generation of H_(2)O and HF,which leads to the formation of a thin and dense *** existence of this interphase is thought to substantially enhance the cycling performance of the *** work not only improves the performance of graphite/NCM811 batteries at room temperature and high temperature by eliminating H_(2)O/HF but also presents a novel strategy for advancing functional electrolyte development.

关键词： Graphite/LiNi_(0.8)Co_(0.1)Mn_(0.1)O_(2)battery Tolylene-2 4-diisocyanate Long-cycling performance H_(2)O/HF eliminated additive

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Research advances in enhanced coal seam gas extraction by controllable shock wave fracturing

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International Journal of Coal Science & Technology 2024年第3期11卷 1-31页

作者： chaojun fan Hao Sun Sheng Li Lei Yang Bin Xiao Zhenhua Yang Mingkun Luo Xiaofeng Jiang Lijun Zhou College of Mining Liaoning Technical UniversityFuxin123000China College of Safety Science and Engineering Liaoning Technical UniversityFuxin123000China Energy Business Department Shanxi Lu’an Chemical GroupChangzhi046200China

With the continuous increase of mining in depth,the gas extraction faces the challenges of low permeability,great ground stress,high temperature and large gas pressure in coal *** controllable shock wave(CSW),as a new method for enhancing permeability of coal seam to improve gas extraction,features in the advantages of high efficiency,eco-friendly,and low *** order to better utilize the CSW into gas extraction in coal mine,the mechanism and feasibility of CSW enhanced extraction need to be *** this paper,the basic principles,the experimental tests,the mathematical models,and the on-site tests of CSW fracturing coal seams are reviewed,thereby its future research directions are *** on the different media between electrodes,the CSW can be divided into three categories:hydraulic effect,wire explosion and excitation of energetic materials by detonating *** the process of propagation and attenuation of the high-energy shock wave in coal,the shock wave and bubble pulsation work together to produce an enhanced permeability effect on the coal *** stronger the strength of the CSW is,the more cracks created in the coal is,and the greater the length,width and area of the cracks *** repeated shock on the coal seam is conducive to the formation of complex network fracture system as well as the reduction of coal seam strength,but excessive shock frequency will also damage the coal structure,resulting in the limited effect of the enhanced gas *** the influence of ground stress,the crack propagation in coal seam will be *** difference of horizontal principal stress has a significant impact on the shape,propagation direction and connectivity of the CSW induced *** permeability enhancement effect of CSW is affected by the breakage degree of coal *** shock wave is absorbed by the broken coal,which may hinder the propagation of CSW,resulting in a poor effect of permeability *** arranging two a

关键词： Controllable shock wave Permeability enhancement Gas extraction Basic principle Experimental test Mathematical models On-site test

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1950-2022年中国煤与瓦斯突出事故的时空分布规律

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辽宁工程技术大学学报（自然科学版） 2024年第3期43卷 279-287页

作者：范超军张鑫鹏杨雷富向杨振华李胜辽宁工程技术大学矿业学院辽宁阜新123000 辽宁地质工程职业学院资源系辽宁丹东118302

为厘清煤与瓦斯突出事故的发生规律,从时间和空间2个维度,对1950-2022年中国煤与瓦斯突出事故进行统计分析并提出防突措施与建议。研究结果表明:1950-2022年中国煤与瓦斯突出事故的时间分布特征可划分为大幅上升时期(1950-1980年)、持... 详细信息

为厘清煤与瓦斯突出事故的发生规律,从时间和空间2个维度,对1950-2022年中国煤与瓦斯突出事故进行统计分析并提出防突措施与建议。研究结果表明:1950-2022年中国煤与瓦斯突出事故的时间分布特征可划分为大幅上升时期(1950-1980年)、持续好转时期(1981-2000年)和稳定下降时期(2001-2022年)。空间分布特征为范围广、较集中、南多北少、南重北轻。煤与瓦斯突出事故发生次数随时间逐渐减少,死亡人数与煤矿事故总死亡人数之比随时间波动上涨。煤与瓦斯突出矿井的空间分布总体呈南多北少的特点。研究结果为中国煤与瓦斯突出事故防治提供参考。

关键词：煤与瓦斯突出突出矿井突出事故灾害防治时空分布

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Coal and gas outburst dynamic system

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International Journal of Mining Science and Technology 2017年第1期27卷 49-55页

作者： fan chaojun Li Sheng Luo Mingkun Du Wenzhang Yang Zhenhua College of Mining Engineering Liaoning Technical UniversityFuxin 123000China State Key Laboratory for Geo Mechanics and Deep Underground Engineering China University of Mining&Technology Xuzhou 221116China State Key Laboratory of Coal Resources and Safe Mining China University of Mining&TechnologyXuzhou 221116China

Coal and gas outburst is an extremely complex dynamic disaster in coal mine production process which will damage casualties and equipment facilities, and disorder the ventilation system by suddenly ejecting a great amount of coal and gas into roadway or working face. This paper analyzed the interaction among the three essential elements of coal and gas outburst dynamic system. A stress-seepage-damage coupling model was established which can be used to simulate the evolution of the dynamical system, and then the size scale of coal and gas outburst dynamical system was investigated. Results show that the dynam- ical system is consisted of three essential elements, coal-gas medium （material basis）, geology dynamic environment （internal motivation） and mining disturbance （external motivation）. On the case of CI 3 coal seam in Panyi Mine, the dynamical system exists in the range of 8-12 m in front of advancing face. The size scale will be larger where there are large geologic structures. This research plays an important guid- ing role for developing measures of coal and gas outburst prediction and prevention.

关键词： Coal and gas outburst Dynamic system Coal-gas mediumlGeology dynamic environment Mining disturbanceStress-seepage-damage coupling model

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锂电池的电解液浸润性评测研究

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广州化工 2024年第19期52卷 73-75,104页

作者：丰杏范超君范伟贞史利涛广州天赐高新材料有限公司广东广州510760

良好的电解液浸润性对于提高锂电池的倍率性能、放电容量和使用寿命具有关键作用。通过深入探讨了锂电池电解液浸润性的多种研究方法,重点聚焦于电芯吸液法。通过电芯吸液法直接测量锂电池对电解液的吸收量,我们能够直观且准确地评估电... 详细信息

良好的电解液浸润性对于提高锂电池的倍率性能、放电容量和使用寿命具有关键作用。通过深入探讨了锂电池电解液浸润性的多种研究方法,重点聚焦于电芯吸液法。通过电芯吸液法直接测量锂电池对电解液的吸收量,我们能够直观且准确地评估电解液的浸润效果。此方法不仅操作简便、成本低廉,而且广泛适用于各类锂电池电芯,对于优化电解液配方、提升电池性能具有重要意义。因此,本文提出的方法为锂电池电解液浸润性的研究和优化提供了有力支持。

关键词：锂离子电池电解液浸润性评测方法电芯吸液法

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Structure and deformation measurements of shallow overburden during top coal caving longwall mining

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International Journal of Mining Science and Technology 2017年第6期27卷 1081-1085页

作者： Li Sheng fan chaojun Luo Mingkun Yang Zhenhua Lan Tianwei Zhang Haifeng College of Mining Liaoning Technical University State and Local Joint Engineering Laboratory for Gas Drainage & Ground Control of Deep Mines Henan Polytechnic University State Key Laboratory of Coal Resources and Safe Mining China University of Mining & Technology Chengyi Coal Mine Inner Mongolia Yitai Coal Co.Ltd.

Mining induced pressures are strong and overburden failure areas are large in top coal caving longwall mining, which constrains high production and safety mining. By employing the combination of the full view borehole photography technique and the seismic CT scanner technique, the deformation and failure of overlying strata of fully mechanized caving face in shallow coal seam were studied and the failure development of overburden was determined. Results show that the full view borehole photography can reveal the characteristics of strata, and the seismic CT scanner can reflect the characteristics of strata between the boreholes. The combined measurement technique can effectively determine the height of fractured and caved zones. The top end of the caved zone in Yangwangou coal mine employing the top coal caving longwall mining was at the depth of 171 m and fractured zone was at the depth of 106-110 m. The results provide a theoretic foundation for controlling the overburden strata in the shallow buried top coal caving panel.

关键词： Top coal caving Shallow depth Overburden failure and deformation Full view borehole photography Seismic CT scanner

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Reasonable start time of carbon dioxide injection in enhanced coalbed methane recovery involving thermal-hydraulic-mechanical couplings

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Frontiers of Earth Science 2023年第3期17卷 832-843页

作者： chaojun fan Lei YANG Bin XIAO Lijun ZHOU Haiou WEN Hao SUN College of Mining Liaoning Technical UniversityFuxin 123000China College of Safety Science and Engineering Liaoning Technical UniversityHuludao 125105China

Injection of gas (CO_(2)) into coal seams is an effective method to benefit from both CO_(2) geological storage and coalbed methane recovery. Based on the dual pore structure of coal mass, and the Weibull distribution of fracture permeability, a menmal-hydraulic-mechanical (THM) coupling mathematical model is proposed involving the non-isothermal adsorption of binary gases, dynamic gas diffusion between matrix and fractures, multiphase seepage, coal deformation, heat conduction and heat convection. This mathematical model is applied to study the process of CO_(2)-enhanced coalbed methane recovery (CO_(2)-ECBM). Results show that the CH4 content of CO_(2)-ECBM in coal seam decreases significantly when compared with that of regular drainage, and decreases rapidly in the early stage but slowly in the later stage. Coal seam permeability evolution is triggered by changes in gas adsorption/desorption, temperature and effective stress. For regular drainage, the early permeability shows a decreasing trend dominated by the increase of effective stress, while the later permeability shows an increasing trend dominated by the CH4 desorption caused shrinkage of coal matrix. For CO_(2)-ECBM, the permeability in coal seam generally shows a downward trend due to both matrix swelling induced by gas adsorption and thermal expansion, particularly near injection well. There appears an increased and delayed peak production rate of CH4. The CH4 production rate of CO_(2)-ECBM is always higher than that of regular drainage. The CH4 cumulative production and CO_(2) cumulative storage linearly increase with time, and the CH4 cumulative production of CO_(2)-ECBM increased by 39.2% in the duration of 5000 d compared with regular drainage. Reasonable CO_(2) injection starting time can overcome the issue of early CO_(2) breakthrough and ineffective increase of CH4 production. In the studied case, the optimal injection starting time is 2500 d. Compared with the simultaneous CH4 extraction and CO_

关键词： CO_(2)sequestration coalbed methane reasonable injection start time thermo-hydro-mechanical coupling model numerical simulation

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Elimination mechanism of coal and gas outburst based on geo‑dynamic system with stress–damage–seepage interactions

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International Journal of Coal Science & Technology 2023年第4期10卷 47-61页

作者： Lingjin Xu chaojun fan Mingkun Luo Sheng Li Jun Han Xiang Fu Bin Xiao College of Mining Liaoning Technical UniversityFuxin 123000China Energy Business Department Shanxi Lu’an Chemical GroupChangzhi 046200China Resource Department Liaoning Geology Engineering Vocational CollegeDandong 118000China

Coal and gas outburst is a complex dynamic disaster during coal underground *** the disaster mechanism is of great signifcance for accurate prediction and prevention of coal and gas *** geo-dynamic system of coal and gas outburst is *** framework of geo-dynamic system is composed of gassy coal mass,geological dynamic environment and mining *** of stress–damage–seepage interaction for gassy coal mass is constructed to resolve the outburst elimination process by gas extraction with boreholes through layer in foor *** results show the occurrence of outburst is divided into the evolution process of gestation,formation,development and termination of geo-dynamic *** scale range of outburst occurrence is determined,which provides a spatial basis for the prevention and control of *** formation criterion and instability criterion of coal and gas outburst are *** formation criterion F1 is defned as the scale of the geo-dynamic system,and the instability criterion F2 is defned as the scale of the outburst *** to the geo-dynamic system,the elimination mechanism of coal and gas outburst—‘unloading+depressurization’is established,and the gas extraction by boreholes through layer in foor roadway for outburst elimination is *** the research case,when the gas extraction is 120 days,the gas pressure of the coal seam is reduced to below 0.4 MPa,and the outburst danger is eliminated efectively.

关键词： Coal and gas outburst Geo-dynamic system Stress–damage–seepage coupling Elimination mechanism Instability criterion Gas extraction

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Highly reinforce the interface stability using 2-Phenyl-1H-imidazole-1-sulfonate electrolyte additive to enhance the high temperature performance of LiNi_(0.8)Co_(0.1)Mn_(0.1)O_(2)/graphite batteries

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Journal of Energy Chemistry 2023年第5期80卷 10-22,I0001页

作者： Xin He Yiting Li Wenlian Wang Xueyi Zeng Huilin Hu Haijia Li Weizhen fan chaojun fan Jian Cai Zhen Ma Junmin Nan School of Chemistry South China Normal UniversityGuangzhou 510006GuangdongChina Guangzhou Tinci Materials Technology Co. Ltd.Guangzhou 510760GuangdongChina

This work develops 2-Phenyl-1H-imidazole-1-sulfonate(PHIS)as a multi-functional electrolyte additive for H2O/HF scavenging and film formation to improve the high temperature performance of LiNi_(0.8)Co_(0.1)Mn_(0.1)O_(2)/graphite *** 450 cycles at room temperature(25℃),the discharge capacity retentions of batteries with blank and PHIS-containing electrolyte are 56.03%and 94.92%*** 230 cycles at high temperatures(45℃),their values are 75.30%and 88.38%*** enhanced electrochemical performance of the batteries with PHIS-containing electrolyte is supported by the spectroscopic characterization and theoretical *** is demonstrated that this PHIS electrolyte additive can facilitate the construction of the electrode interface films,remove the H2O/HF in the electrolyte,and improve the electrochemical performance of the *** work not only develops a sulfonate-based electrolyte but also can stimulate new ideas of functional additives to improve the battery performance.

关键词： LiNi_(0.8)Co_(0.1)Mn_(0.1)O_(2)/graphite battery High temperature performance H_(2)O/HF scavenger 2-Phenyl-1H-imidazole-1-sulfonate Electrolyte additive

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PMMA基凝胶聚合物电解质在石墨/LiNi_(0.8)Mn_(0.1)Co_(0.1)O_(2)电池中的研究

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电池工业 2024年第3期28卷 150-156页

作者：程鹏飞范超君刘倩彤范伟贞史利涛广州天赐高新材料股份有限公司广东广州510760

凝胶聚合物电解质(GPE)是当前最具商业化应用前景之一的准固态电解质,可以缓解甚至解决锂离子电池存在的漏液、挥发、燃烧等潜在安全问题。本文通过高温原位固化技术制备了一种以甲基丙烯酸甲酯为单体、聚乙二醇二甲基丙烯酸酯为交联剂... 详细信息

凝胶聚合物电解质(GPE)是当前最具商业化应用前景之一的准固态电解质,可以缓解甚至解决锂离子电池存在的漏液、挥发、燃烧等潜在安全问题。本文通过高温原位固化技术制备了一种以甲基丙烯酸甲酯为单体、聚乙二醇二甲基丙烯酸酯为交联剂、双(氟磺酰)亚胺锂为导电盐、碳酸乙烯酯/碳酸甲乙酯混合溶剂为增塑剂的GPE。通过热重分析对聚甲基丙烯酸甲酯(PMMA)基GPE的热力学性质进行了表征,采用计时安培法和电子扫描显微镜研究了PMMA基GPE对Al集流体的稳定性。研究结果表明,PMMA基GPE在室温拥有较高的电导率,达到6.61 mS/cm,同时可以将碳酸酯电解液的挥发温度由100.3℃提高至138.1℃。PMMA基GPE在高电位下对Al箔显示出良好的稳定性,4.3 V ***/Li+以下不会发生铝箔腐蚀,而且在商用石墨/LiNi_(0.8)Mn_(0.1)Co_(0.1)O_(2)软包电池中展现出良好的循环稳定性和容量保持能力,循环1000次后容量保持率为93.4%。

关键词：凝胶聚合物电解质甲基丙烯酸甲酯双(氟磺酰)亚胺锂原位固化

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