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Recycled graphite for more sustainable lithium-ion batteries

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Carbon Energy 2024年第5期6卷 15-24页

作者： Mayokun Olutogun Anna Vanderbruggen Christoph Frey Martin Rudolph Dominic Bresser Stefano Passerini Helmholtz institute Ulm(HIU) Ulm Germany Karlsruhe institute of technology(KIT) KarlsruheGermany Helmholtz Zentrum Dresden-Rossendorf(HZDR) Helmholtz Institute Freiberg for Resource Technology(HIF)FreibergGermany ProGraphite GmbH UntergriesbachGermany Chemistry Department Sapienza University of RomeRomeItaly

The demand for lithium-ion batteries(LIBs)is driven largely by their use in electric vehicles,which is projected to increase dramatically in the *** great success,however,urgently calls for the efficient recycling of LIBs at the end of their ***,we describe a froth flotation-based process to recycle graphite—the predominant active material for the negative electrode—from spent LIBs and investigate its reuse in newly assembled *** has been found that the structure and morphology of the recycled graphite are essentially unchanged compared to pristine commercial anode-grade graphite,and despite some minor impurities from the recycling process,the recycled graphite provides a remarkable reversible specific capacity of more than 350 mAh g^(−1).Even more importantly,newly assembled graphite‖NMC532 cells show excellent cycling stability with a capacity retention of 80%after 1000 cycles,that is,comparable to the performance of reference full cells comprising pristine commercial graphite.

关键词： anode graphite lithium-ion battery recycling sustainability

林克明旧居修缮与活化利用,广州,广东,中国

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世界建筑 2024年第8期 64-69页

作者： Guangdong Architectural Design and Research institute Group Co.,Ltd. Architectural Design and Research institute of South China University of technology 广东省建筑设计研究院集团股份有限公司华南理工大学建筑设计研究院有限公司

街区断点更新林克明旧居(简称旧居)1935年由中国第一代著名建筑师林克明设计建造。旧居所在的越秀北路原为民国初年广州城墙拆除后的城基路,城外即东濠涌,前后高差达8m。林克明巧妙地利用地形组织功能与空间,并采用摩登建筑理念,使建筑... 详细信息

街区断点更新林克明旧居(简称旧居)1935年由中国第一代著名建筑师林克明设计建造。旧居所在的越秀北路原为民国初年广州城墙拆除后的城基路,城外即东濠涌,前后高差达8m。林克明巧妙地利用地形组织功能与空间,并采用摩登建筑理念,使建筑形体呈现出迷人的风采。

关键词：建筑形体建筑理念活化利用功能与空间著名建筑师林克明修缮城墙

STEERING SAFETY EVALUATION OF DRIVER VEHICLE CLOSED LOOP SYSTEM WITH RANDOM ROAD INPUT

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Chinese Journal of Mechanical Engineering 1999年第4期12卷 282-287页

作者： Zhao Youqun Shandong institute of technology Guo Konghui Zhang Guiyu Jilin University of technology Shandong institute of technology 山东工程学院汽车工程系山东淄博 255012 吉林工业大学汽车动态模拟国家重点实验室吉林长春山东工程学院山东淄博

The response simulation is studied and the steering safety is evaluated by using finer integration method for driver vehicle closed loop system with stationary random road *** algorithm not only is precise, but also can shorten the evaluation period of steering safety and reduce the tremendous cost for real vehicle *** response simulation and the vehicle steering safety evaluation are also studied for the closed loop system with evolutionary random road *** study can more truly evaluate vehicle driving for including the slowly varying of vehicle velocity with time.

关键词： Closed loop system Evaluation Random Safety Vehicle steer ability

TRACKING OBSERVATION ON SUBSURFACE CRACK IN BEARING STEEL GCr15 UNDER ROLLING CONTACT

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Acta Metallurgica Sinica(English Letters) 1992年第2期5卷 128-132页

作者： CHEN Longqing Zhengzhou institute of technology,Zhengzhou,China CHEN Qing Luoyang institute of technology,Luoyang,China Zhengzhou Inst of technology Zhengzhou China

Based on the sequent tracking observation on spalling of steel GCr15 under rolling contact fa- tigue,an expression for estimating the propagation of subsurface cracks was *** rol- ling contact fatigue life was found to be markedly related to the subsurface crack propagation angle.A new explanation of reason why the rolling contact fatigue life can be prolonged by residual compressive stress and retained austenite was advanced.

关键词： contact fatigue fatigue life crack propagating angle residual stress retained austenite

关于β-羟基-β-甲基丁酸钙(CaHMB)应用的科学共识

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中国食品学报 2024年第6期24卷 486-497页

作者：中国食品科学技术学会宋雁李雅慧顾文涛毛颖异陈铮但晓雅北京100048 国家食品安全风险评估中心江南大学国家功能食品工程技术研究中心南开大学中国轻工业特殊膳食营养与健康研究重点实验室中国食品科学技术学会

羟基-β-甲基丁酸钙(CaHMB)作为新食品原料,已在国内外多个国家获批,允许在特殊医学用途配方食品中使用,然而我国在该原料获批后十余年间尚未有相关特殊医学用途配方食品上市。相关行业、监管部门和消费者对应用CaHMB的健康作用、安全... 详细信息

羟基-β-甲基丁酸钙(CaHMB)作为新食品原料,已在国内外多个国家获批,允许在特殊医学用途配方食品中使用,然而我国在该原料获批后十余年间尚未有相关特殊医学用途配方食品上市。相关行业、监管部门和消费者对应用CaHMB的健康作用、安全性、使用剂量等方面的认知尚有待形成共识。为进一步推动CaHMB应用,服务人群营养健康需求,本文通过文献分析与专题研讨形式,在综合分析国内外有关CaHMB研究与应用现状的基础上,结合科技界与产业界有关专家意见,形成关于应用CaHMB的科学共识,即:1)通过新食品原料CaHMB(HMB的钙盐形式)补充HMB,是促进肌肉蛋白合成和减缓肌肉蛋白分解的一个重要途径;2)补充CaHMB有利于纠正负氮平衡,有利于老年人群、多类患病人群(如肌肉衰减综合征、肿瘤等)的肌肉健康;3)CaHMB的安全性被广泛认可,适当提高其每日最大食用限量,将更好地助力目标人群健康获益和产业应用发展。建议:从政策层面积极引导和适当提高CaHMB每日食用限量,以满足人群营养健康需求;进一步加强对Ca HMB的科研创新,为更好地应用CaHMB以及相关政策制定提供科技支撑;推动CaHMB在食品产业,尤其在特殊医学用途配方食品中的应用,促进相关产业高质量发展。

关键词： β-羟基-β-甲基丁酸钙新食品原料科学共识健康获益安全性

SYMMETRICAL SISF IN DEFORMED Ni_3Al AND ITS FORMATION MECHANISM

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Acta Metallurgica Sinica(English Letters) 1992年第2期5卷 76-81页

作者： YAN Wen Xi′an institute of technology,Xi′an,China Xi'an Inst of technology Xi'an China

The symmetrical superlattice intrinsic stacking faults(SISFs)formed on {111} planes are the predominant crystal defects in polycrystalline Ni_3AI after slight deformation at room temper- *** formation of this kind of SISF is resulted from the dipoles which are distributed on the neighboring {111} planes after reorientation,dissociation and annihilation under applied stress.

关键词： deformed Ni_3Al symmetrical stacking fault formation mechanism

The Method of Single Peak Fourier Analysis of Measuring the Size of Mosaic Block and Microstrain by X-ray Diffraction

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Journal of Materials Science & technology 2000年第1期16卷 67-70页

作者： Ming CHANG (Tianjin institute of technology, Tianjin 300191, China) Tianjin institute of technology Tianjin 300191 China

The values of mosaic block size and microstrain measured by the method of Voigt function are sometimes largely erroneous and difficult to be revised. In this paper, the causes of the 'hook effect' which inevitably exists in the method of Fourier analysis are explained; then the method for resolving this effect is put forward; and finally the method of hypothetical function is used to simplify the method of the Fourier analysis from multi-peak to single-peak. By introducing the parameter m, this method can not only indicate the degree of errors, but also revise them as well, it is simple, clear and able to accomplish the intricate pattern calculation quickly by the aid of computer. In the end, we argue the identity between method of the approximate function and the Fourier analysis, and give a more accurate proportional coefficient k.

关键词： Measurement theory

DETERMINATION OF SECTION THICKNESS AND REASONABLE PRESTRESSING FORCE OF PRESTRESSED CONCRETE SUBMARINE OIL STORAGE TANKS

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China Ocean Engineering 1987年第2期1卷 11-21页

作者： Tang Tieyu (Dalian institute of technology, Dalian) Dalian Inst of technology Dalian China Dalian Inst of Technology Dalian China

In this paper, based on the research of F. K. Kong[1] and considering the special features of submarine oil storage tanks, formulae for calculation of the minimum section thickness of oil tanks and simplified formulae for calculating tendon area of the tank are proposed. The main idea of these formulae is to determine the prestressing force more reasonably. An example is given to illustrate the steps of calculation. According to the method proposed in this paper, the trouble of repeated corrections of section thickness and tendon area is avoided and a short-cut method of choosing the best design is proposed.

关键词： DETERMINATION OF SECTION THICKNESS AND REASONABLE PRESTRESSING FORCE OF PRESTRESSED CONCRETE SUBMARINE OIL STORAGE TANKS

THEORETICAL INVESTIGATION ON STATE OF LOAD DISTRIBUTION AMONG CONTACT BEARINGS OF DOUBLE CIRCULAR ARC HELICAL GEARS

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Chinese Journal of Mechanical Engineering 2000年第2期13卷 108-113页

作者： Wu Baolin (Gear Research institute, Taiyuan University of technology) 太原理工大学山西太原

A dynamic analysis approcach to investigate the state of load distribution among contact bearings of double circular are belical gears is proposed and a computer program is developed for calculating the factor of iced distribution based on the theory of W-N gears. The changing situations of load distribution among contact bearings of the gears influenced by main issues are analyzed by a series of parametric studies.

关键词： Double circular are belical gears State of load distribution Factor of load distribution Dynamic analysis