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High-energy-density lithium manganese iron phosphate for lithium-ion batteries: Progresses, challenges, and prospects

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Journal of Energy Chemistry 2025年第1期100卷 1-17页

作者： Bokun Zhang Xiaoyun Wang Shuai Wang Yan Li libo chen Handong Jiao Zhijing Yu Jiguo Tu State Key Laboratory of Advanced Metallurgy University of Science and Technology Beijing Research Institute for Intelligent Wearable Systems The Hong Kong Polytechnic University Institute of Advanced Structure Technology Beijing Institute of Technology

The soaring demand for smart portable electronics and electric vehicles is propelling the advancements in high-energy–density lithium-ion *** manganese iron phosphate (LiMnxFe1-xPO4) has garnered significant attention as a promising positive electrode material for lithium-ion batteries due to its advantages of low cost,high safety,long cycle life,high voltage,good high-temperature performance,and high energy *** LiMnxFe1-xPO4has made significant breakthroughs in the past few decades,there are still facing great challenges in poor electronic conductivity and Li-ion diffusion,manganese dissolution affecting battery cycling performance,as well as low tap *** review systematically summarizes the reaction mechanisms,various synthesis methods,and electrochemical properties of LiMnxFe1-xPO4to analyze reaction processes accurately and guide material ***,the main challenges currently faced are concluded,and the corresponding various modification strategies are discussed to enhance the reaction kinetics and electrochemical performance of LiMnxFe1-xPO4,including multi-scale particle regulation,heteroatom doping,surface coating,as well as microscopic morphology ***,in view of the current research challenges faced by intrinsic reaction processes,kinetics,and energy storage applications,the promising research directions are *** importantly,it is expected to provide key insights into the development of high-performance and stable LiMnxFe1-xPO4materials,to achieve practical energy storage requirements.

关键词： Lithium manganese iron phosphate High energy density Lithium-ion batteries Reaction mechanism Tap density

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From waste to added-value product: A case of efficient separation and recovery of zinc and iron from spent galvanizing acid

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Progress in Natural Science:Materials International 2024年第4期34卷 702-709页

作者： Jiguo Tu Xin Feng Bokun Zhang libo chen State Key Laboratory of Advanced Metallurgy University of Science and Technology Beijing Jianlong Group & USTB Joint Laboratory University of Science and Technology Beijing

Spent galvanizing acid solution contains high concentrations of zinc salts, ferrous salts, and residual acids,exhibiting extremely high value-added recovery potential. However, achieving the efficient extraction and separation of Zn over Fe becomes particularly challenging under elevated Zn ion concentration. Here, the key extraction parameters, such as modifier ratio, Cyanex 923 concentration and ratio of organic phase to aqueous phase（O/A）, are investigated. The stripping and regeneration of extractant, extraction mechanism, as well as high-value recovery of Zn and Fe resources are also comprehensively expounded. After the two-stage extraction,the extraction efficiency of Zn and Fe is 98.92 % and 2.09 %, respectively. Moreover, the stripping efficiency of Zn reaches 92.3 % with O/A ratio of 1 : 2, using oxalic acid as stripping agent. The predominant extracted species is confirmed to be ZnCl-3, resulting in the formation of HZnCl3· R3PO complex. More importantly, the regenerated extractant can be recycled back into the extraction process, and the reproduced HCl, high-value recovered ZnO and Fe2O3can be used for different industrial fields. These findings lay a solid foundation for the efficient separation and comprehensive recovery of high-concentration spent galvanizing acid solution.

关键词： Zinc recovery Iron recovery Solvent extraction Spent galvanizing acid Extraction efficiency

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Piezo-phototronic and pyro-phototronic effects to enhance Cu（In, Ga）Se2 thin film solar cells

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Nano Research 2018年第7期11卷 3877-3885页

作者： Laipan Zhu Pei Lin Baodong chen Longfei wang libo chen Ding Li Zhong Lin Wang Beijing Institute of Nanoenergy and Nanosystems Chinese Academy of Sciences Beijing 100083 China College of Nanoscience and Technology University of ChineseAcademy of Sciences Beijing 100049 China

Cu（In, Ga）Se2 （CIGS）-based materials have gained remarkable attention for thin-film photovoltaic applications due to their high absorption coefficient, tunable bandgap, compositional tolerance, outstanding stabilities, and high efficiency. A small increase in the efficiency of CIGS solar cells has huge economic impact and practical importance. As such, we fabricated a flexible CIGS solar cell on a mica substrate and demonstrated the enhanced device performance through the piezo- and pyro-phototronic effects based on a ZnO thin film. The device showed enhanced energy conversion efficiency from 13.48% to 14.23% by decreasing the temperature from 31 to 2℃ at a rate of - 0.6℃·s^-1 via the pyro-phototronic effect, and further enhanced from 14.23% to 14.37% via the piezo-phototronic effect by further applying a static compressive strain. A pyro-electric nanogenerator effect was also found to promote the performance of the CIGS solar cell at the beginning of the cooling process. The manipulated energy band of the CIGS/CdS/ZnO heterojunction under the influence of the inner pyroelectric and piezoelectric potentials is believed to contribute to these phenomena. Applying the piezo- and pyro-phototronic effects simultaneously offers a new opportunity for enhancing the output performance of commercial thin film solar cells.

关键词： CIGS solar cell pyro-phototronic effect piezo-phototronic effect piezopotential pyropotential

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Tribotronic transistor sensor for enhanced hydrogen detection

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Nano Research 2017年第11期10卷 3857-3864页

作者： Yaokun Pang libo chen Guofeng Hu Jianjun Luo Zhiwei Yang Chi Zhang Zhong Lin Wang Beijing Institute of Nanoenergy and Nanosystems Chinese Academy of Sciences Beijing 100083 China National Center for Nanoscience and Technology(NCNST) Beijing 100190 China University of Chinese Academy of Sciences Beijing 100049 China School of Material Science and Engineering Georgia Institute of Technology Atlanta Georgia 30332 USA

Hydrogen detection with a high sensitivity is necessary for preventing potential explosions and *** this study,a novel ZnO tribotronic transistor is developed by coupling a ZnO field effect transistor （FET） and triboelectric nanogenerator in free-standing mode and is used as a sensor for hydrogen detection at room *** modulated performances of the hydrogen sensor are demonstrated by investigating its output characteristics at different sliding distances and hydrogen *** applying an external mechanical force to the device for sliding electrification,the detection sensitivity of the ZnO tribotronic transistor sensor is improved,with a significant enhancement achieved in output current by 62 times at 500 ppm hydrogen and 1 V bias *** study demonstrates an extension of the applications of emerging tribotronics for gas detection and a prospective approach to improve the performance of the hydrogen sensor via human-interfacing.

关键词： tribotronics triboelectric nanogenerator ZnO hydrogen detection sensitivity

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Self-powered acoustic source Iocator in underwater environment based on organic film triboelectric nano-generator

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Nano Research 2015年第3期8卷 765-773页

作者： Aifang Yu Ming Song Yan Zhang Yang Zhang libo chen Junyi Zhai Zhong Lin Wang Beijing Institute of Nanoenergy and Nanosystems Chinese Academy of Sciences Beijing 100083 China School of Material Science and Engineering Georgia Institute of Technology Atlanta Georgia 30332 USA

Detecting/sensing targets underwater has very important applications in environmental study, civil engineering and national security. In this paper, an organic-film based triboelectric nanogenerator （TENG） has been successfully demonstrated for the first time as a self-powered and high sensitivity acoustic sensor to detect underwater targets at low frequencies around 100 Hz. This innovative, cost-effective, simple-design TENG consists of a thin-film-based Cu electrode and a polytetrafluoroethylene （PTFE） film with nanostructures on its surfaces. On the basis of the coupling effect between triboelectrification and electrostatic induction, the sensor generates electrical output signals in response to incident sound waves. Operating at a resonance frequency of 110 Hz, under an acoustic pressure of 144.2 dBspc, the maximum open-circuit voltage and short-circuit current of the generator can respectively reach 65 V and 32 ~A underwater. The directional dependence pattern has a bi-directional shape with a total response angle of 60~. Its sensitivity is higher than -185 dB in the frequency range from 30 Hz to 200 Hz. The highest sensitivity is -146 dB at resonance frequency. The three-dimensional coordinates of an acoustic source were identified by four TENGs, self-powered active sensors, and the location of the acoustic source was determined with an error about 0.2 m. This study not only expands the application fields of TENGs from the atmosphere to water, but also shows the TENG is a promising acoustic source locator in underwater environments.

关键词： triboelectricnanogenerator self-powered acousticsource locator underwater three dimensionalcoordinate

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Golden Enterprises Project General Sketch of the National Production and Circulation Information System

Golden Enterprises Project General Sketch of the National Pr...

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1996 International Conference on Information Infrastructure(ICII’96)

作者： chen libo QU Minglei The Economic Information Center State Economic ＆Trade Commission of P.R.China 26 Xuanwumen West Street Beijing 100053P.R.China

＜正＞The GEP（Golden Enterprises Project）is an intertrade,fundamental and public enterprisesbased information system which is an important part of the information resource network in the National Economy *** plays an important role in the process of National Economy Informationalization,not only helping the governments of all levels to regulate macroeconomy but also delivering information guidance and information service to *** main objective of GEP is to develop a nationally wide,interconnected information network system which integrates the computer and communication technology having both the central and distributed mode according to the principle of"Overall Planning, Joint Construction,Unified Standards and Integration of the Public and Private Application".

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国际比较视野下职业教育社会认同的提升路径研究

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教育与职业 2022年第21期1021卷 65-72页

作者：陈丽博河南交通职业技术学院科研外事处河南郑州451460

文章对美国、德国、英国、日本等世界主要发达国家在提升职业教育社会认同的举措方面进行了深入分析,指出职业教育社会认同深受国家政策和法律、办学和育人模式、技术技能人才待遇、职业教育学历层次及通用性等因素的影响。借鉴国际经验... 详细信息

文章对美国、德国、英国、日本等世界主要发达国家在提升职业教育社会认同的举措方面进行了深入分析,指出职业教育社会认同深受国家政策和法律、办学和育人模式、技术技能人才待遇、职业教育学历层次及通用性等因素的影响。借鉴国际经验,我国可以从加强顶层设计、深化产教融合、强化用人激励、发展高层次职业教育等方面入手,探索提升职业教育社会认同的路径。

关键词：职业教育社会认同国际比较技能型人才社会地位

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压力曝气生物反应器处理废水的研究

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同济大学学报（自然科学版） 2007年第9期35卷 1219-1224页

作者：陈立波李风亭同济大学污染控制与资源化研究国家重点实验室

压力曝气反应器采用压力曝气提高混合液的溶解氧及有机物降解速度，曝气压力为0．05～0．25MPa；密闭塔式结构，设备最佳高度与直径比为3：1．以乙醛废水为试验介质，在曝气压力分别为0．10，0．15，0．20MPa时，反应器中混合液溶解氧... 详细信息

压力曝气反应器采用压力曝气提高混合液的溶解氧及有机物降解速度，曝气压力为0．05～0．25MPa；密闭塔式结构，设备最佳高度与直径比为3：1．以乙醛废水为试验介质，在曝气压力分别为0．10，0．15，0．20MPa时，反应器中混合液溶解氧（DO）质量浓度达到5．0，7．5，10．0mg·L^-1；有机物降解速度（以化学耗氧量COD计）分别为5．80，7．20和9．50kg·m^-3·d^-1，为常压曝气的2．5～4．0倍．在曝气压力为0．15～0．20MPfl时，污泥表观产率为常压曝气的1／2～1／3左右，混合液微生物脱氢酶活性指示物（TF）质量浓度达到80μg·mL^-1．应用该反应器处理味精废水，污泥龄为5～8d，污泥质量浓度为3500-5000mg．L^-1，水力停留时间为7h，曝气压力0．10MPa，曝气量为处理水量的20-30倍，COD去除率达到97．7％，NH3-N去除率达到96．0％，处理出水达到国家一级排放标准．

关键词：压力曝气生物反应器味精废水设计参数

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出入境边防检查的行为模式分析

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政法论坛 2010年第6期28卷 85-94页

作者：陈立波武汉大学法学院

出入境边防检查行为是包含行政事实行为和行政法律行为的综合体,而对于出入境边防检查中的行政法律行为,我们不能简单地界定为行政许可、行政确认、行政处罚或者行政强制。按照目前立法发展趋势来看,出入境边防检查的法律效果包括准予... 详细信息

出入境边防检查行为是包含行政事实行为和行政法律行为的综合体,而对于出入境边防检查中的行政法律行为,我们不能简单地界定为行政许可、行政确认、行政处罚或者行政强制。按照目前立法发展趋势来看,出入境边防检查的法律效果包括准予出境、入境和不准出境、入境,其中准予出境、入境属于行政确认,而不准出境、入境既是行政处罚的一种类型,同时也包含着行政强制措施的属性。

关键词：出入境边防检查行政行为模式法律性质

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Linux内核跟踪机制LTT的研究

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计算机工程 2005年第12期31卷 61-63页

作者：陈丽波吴庆波国防科学技术大学计算机学院长沙410073

LTT(LinuxTraceToolkit)是Linux内核性能分析工具,由探测内核、数据收集模块、数据提交守护进程、数据表示和分析软件4部分组成,它主要对内核事件进行跟踪,提供精确详细的跟踪信息重构特定时间段内系统行为,使得用户正确了解系统动态,... 详细信息

LTT(LinuxTraceToolkit)是Linux内核性能分析工具,由探测内核、数据收集模块、数据提交守护进程、数据表示和分析软件4部分组成,它主要对内核事件进行跟踪,提供精确详细的跟踪信息重构特定时间段内系统行为,使得用户正确了解系统动态,并为后期数据处理提供特色图形化显示和分析工具。经过测试,运行LTT开销低廉,能够有效帮助用户识别性能瓶颈。

关键词： Linux 性能分析动态探针

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