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From waste to wealth:Coal tar residue derived carbon materials as low-cost anodes for potassium-ion batteries

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International Journal of Minerals,Metallurgy and materials 2025年第2期32卷 464-475页

作者： Zhonghua Lu Jun Shen Xin Zhang Lingcong Chao Liang Chen Ding Zhang Tao Wei Shoudong Xu College of Chemical engineering and Technology Taiyuan University of TechnologyTaiyuan 030024China College of Chemistry Taiyuan University of TechnologyTaiyuan 030024China School of Chemical engineering and Pharmacy Wuhan Institute of TechnologyWuhan 430205China School of Energy and Power Jiangsu University of Science and TechnologyZhenjiang 212003China

Carbon materials are widely recognized as highly promising electrode materials for various energy storage system *** tar residues(CTR),as a type of carbon-rich solid waste with high value-added utilization,are crucially important for the development of a more sustainable *** this study,we employed a straightforward direct carbonization method within the temperature range of 700-1000℃to convert the worthless solid waste CTR into economically valuable carbon materials as anodes for potassium-ion batteries(PIBs).The effect of carbonization temperature on the microstructure and the potassium ions storage properties of CTR-derived carbons(CTRCs)were systematically explored by structural and morphological characterization,alongside electrochemical performances *** on the co-regulation between the turbine layers,crystal structure,pore structure,functional groups,and electrical conductivity of CTR-derived carbon carbonized at 900℃(CTRC-900H),the electrode material with high reversible capacity of 265.6m Ah·g^(-1)at 50 m A·g^(-1),a desirable cycling stability with 93.8%capacity retention even after 100 cycles,and the remarkable rate performance for PIBs were ***,cyclic voltammetry(CV)at different scan rates and galvanostatic intermittent titration technique(GITT)have been employed to explore the potassium ions storage mechanism and electrochemical kinetics of *** indicate that the electrode behavior is predominantly governed by surface-induced capacitive processes,particularly under high current densities,with the potassium storage mechanism characterized by an“adsorption-weak intercalation”*** work highlights the potential of CTR-based carbon as a promising electrode material category suitable for high-performance PIBs electrodes,while also provides valuable insights into the new avenues for the high value-added utilization of CTR.

关键词： coal tar residue carbon materials anode potassium-ion batteries high value-added

Dual modulation of homogeneous nanomaterialization and electrochemical activation enhancing zinc ion storage

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science China Chemistry 2025年第1期68卷 385-393页

作者： Jianwei Wang Huan Wang Kangning Wang Wenhui Wang Wenlin Zhang Yanzhong Zhen School of Chemistry & Chemical engineering Yan'an University

Vanadium-based electrode materials are widely investigated,but the low specific capacity and slow electrochemical kinetics in aqueous zinc-ion batteries still limit their commercial ***,the VS2/Ca V4O9material with the morphology of nanoflower was synthesized by a one-step hydrothermal *** to the blocky structure of pure VS2material,the VS2/Ca V4O9material is composed of thinner homogeneous *** open structures could provide abundant electrochemical active sites and ion transport channels,and then promote the electrochemical reaction *** addition,they can also buffer the bulk strain during the reaction *** improve the utilization of vanadium elements,an in-situ electrochemical activation strategy is used to explore the storage performance of the VS2/Ca V4O9material,the different activation voltage range of 0.4–1.6 and 0.4–1.4 V are selected,*** with the longer activation plateau of activated-VS2,the VS2/Ca V4O9cathode could quickly reach the activation state in the range of 1.4–1.6 V and cause the release of additional Zn storage sites *** VS2/Ca V4O9cathode delivers a higher power density of 37,000 W kg-1and a significant energy density of 423 Wh *** the high current density of 15 A g-1,the VS2/Ca V4O9cathode still has a discharge capacity of 183.9m Ah g-1after 5,000 cycles,and the capacity decay rate per cycle is only 0.0042%.Continuous cyclic voltammetry （CV） curves,electrochemical impedance spectroscopy （EIS） measurements,density functional theory （DFT） calculation and galvanostatic intermittent titration technique （GITT） measurements demonstrate that the VS2/Ca V4O9cathode has a faster ion diffusion/charge transfer ***,the assembled flexible device has an excellent mechanical stability.

关键词： dual modulation homogeneous nanomaterialization electrochemical activation zinc ion storage

Magnetic field sensors using arrays of electrospun magnetoelectric Janus nanowires

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Microsystems & Nanoengineering 2018年第1期4卷 24-35页

作者： Matthew J.Bauer Xiao Wen Prabal Tiwari David P.Arnold Jennifer S.Andrew dept.of materials science and engineering University of FloridaGainesvilleFL 32611-6400USA dept.of Electrical and Computer engineering University of FloridaGainesvilleFL 32611-6200USA

The fabrication and characterization of the first magnetoelectric sensors utilizing arrays of Janus magnetoelectric composite nanowires composed of barium titanate and cobalt ferrite are *** utilizing magnetoelectric nanowires suspended across electrodes above the substrate,substrate clamping is reduced when compared to layered thin-film architectures;this results in enhanced magnetoelectric *** magnetoelectric nanowires are fabricated by sol–gel electrospinning,and their length is controlled through the electrospinning and calcination *** a directed nanomanufacturing approach,the nanowires are then assembled onto pre-patterned metal electrodes on a silicon substrate using *** this process,functional magnetic field sensors are formed by connecting many nanowires in *** observed magnetic field sensitivity from the parallel array of nanowires is 0.514±.027mV Oe^(−1) at 1 kHz,which translates to a magnetoelectric coefficient of 514±27mV cm^(−1) Oe^(−1).

关键词： nanowires composite utilizing

Rejecting Character Recognition Errors Using CNN Based Confidence Estimation

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Chinese Journal of Electronics 2016年第3期25卷 520-526页

作者： LI Pengchao PENG Liangrui WEN Juan Tsinghua National Laboratory for Information science and Technology Dept.of Electronic EngineeringTsinghua University Equipment Academy

Although Optical character recognition(OCR) technology has achieved huge progress in recent years, character misrecognition is inevitable. In order to realize high fidelity content of document digitalization,we propose a new Convolutional neural networks(CNN)based confidence estimation method. We detect the misrecognized characters through comparing the confidence value with a preset threshold, so as to leave the recognition errors as embedded images in the output digital documents. We adopted sofmax as the estimation of posteriori probability,overlap pooling and maxout with dropout technologies in CNN architecture design. Experimental results show that our method has achieved an explicit improvement compared to baseline system.

关键词： Optical character recognition(OCR) Confidence estimation Convolutional neural networks(CNN)

Interfacial bonding state on different metals Ag, Ni in cold pressure welding

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中国有色金属学会会刊：英文版 2003年第2期13卷 276-279页

作者：李云涛杜则裕陶勇寅 School of material science and engineering Tianjin University

The interfacial bonding state for the different metals Ag, Ni without metallurgic are actions was studied. The tensile test of the joint concludes that the bonding strength of Ag,Ni in cold pressure welding is strong enough to satisfy the demand of application, while the value of bonding strength is larger than that of Ag base. The conclusions further signify that the metals(hardly being mutual soluble) can be welded, and supply extremely important references to the further study either on test or theory for the weldability of different metals. The theoretical analysis and calculations of the bonding strength were made on the base of thermodynamics, crystallography, solid physics etc. Moreover, by means of microscopic test and analysis, especially drawing support from the research of Al Pb, this strong bonding mainly depends on the mechanical bonding power and metal atomic linkage, but not on the atomic diffusion.

关键词：冷压焊银镍界面结合状态焊接

Effect of elements Zn, Sn and In on microstructures and performances of AZ91 alloy

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Transactions of Nonferrous Metals Society of China 2010年第B7期20卷 318-323页

作者：于湛赵红阳胡小东巨东英 Graduate School of Saitama Institute of Technology Department of material science and engineering University of Science and Technology Liaoning Department of material science and engineering Saitama Institute of Technology

A new magnesium alloy plate added elements Zn, Sn and In was manufactured by twin-roll continuous casting method to improve the precipitation of AZ91 alloy. The effects of elements addition and casting method on microstructure and mechanical properties of the Mg-Zn-In-Sn alloys were investigated by optical microscopy (OM), transmission electron microscopy (TEM), electron probe micro-analysis (EPMA), X-ray diffractometry (XRD) and energy dispersion spectrograph (EDS). The results show that the Mg-Zn-In-Sn alloy has higher tensile strength and better corrosion protection than the AZ91 alloy. The outstanding precipitation strengthening effect of the alloy is attributed to the small grain size and the hard precipitates between the grain boundaries.

关键词： AZ91 alloy Mg-Zn-In-Sn alloy twin-roll continuous casting mechanical property

Effect of Compound Rare Earth on Shape Memory Effect of Fe-Mn-Si-Ni-C Alloys

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Journal of Rare Earths 2003年第S1期21卷 168-172页

作者：司乃潮贾志宏祁隆飙 School of material science and engineering Jiangsu University

Effect of compound rare earth (RE) on shape memory effect (SME) of Fe-Mn-Si-Ni-C shape memory alloy was studied by bent measurement,thermal cycle training, SEM and XRD etc. The results show that metallurgic microstructure is refined and SME improved evidently with the addition of compound RE. The alloy appears little two-way shape memory effect. The former training and addition of compound RE are two effective ways to restrain martensitic stability. XRD analysis also indicates that ε→γ reversible transition ratio increases by training greatly help to improve SME of the alloy.

关键词： Fe-Mn-Si-Ni-C shape memory alloy grain refinement shape memory effect thermal cycle training rare earths

RFID-based 3D human pose tracking: A subject generalization approach

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Digital Communications and Networks 2022年第3期8卷 278-288页

作者： Chao Yang Xuyu Wang Shiwen Mao dept.of Electrical and Computer engineering Auburn UniversityAuburnAL36849-5201USA dept.of Computer science California State UniversitySacramentoCA95819-6021USA

Three-dimensional (3D) human pose tracking has recently attracted more and more attention in the computer vision field. Real-time pose tracking is highly useful in various domains such as video surveillance, somatosensory games, and human-computer interaction. However, vision-based pose tracking techniques usually raise privacy concerns, making human pose tracking without vision data usage an important problem. Thus, we propose using Radio Frequency Identification (RFID) as a pose tracking technique via a low-cost wearable sensing device. Although our prior work illustrated how deep learning could transfer RFID data into real-time human poses, generalization for different subjects remains challenging. This paper proposes a subject-adaptive technique to address this generalization problem. In the proposed system, termed Cycle-Pose, we leverage a cross-skeleton learning structure to improve the adaptability of the deep learning model to different human skeletons. Moreover, our novel cycle kinematic network is proposed for unpaired RFID and labeled pose data from different subjects. The Cycle-Pose system is implemented and evaluated by comparing its prototype with a traditional RFID pose tracking system. The experimental results demonstrate that Cycle-Pose can achieve lower estimation error and better subject generalization than the traditional system.

关键词： Radio-frequency identification(RFID) Three-dimensional(3D)human pose tracking Cycle-consistent adversarial network Generalization

Effects of Rare Earths on Toughness of 31Mn2SiRE Wear- Resistance Cast Steel

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Journal of Rare Earths 2006年第Z2期24卷 401-404页

作者：谢敬佩王爱琴王文焱李继文李洛利 School of material science and engineering Henan University of Science and Technology

The toughness of 31Mn2SiRE wear-resistance cast steel were increased by means of RE compound modification and high temperature austenitizing. The results show that the microstructures can be refined, needle and network ferrite are eliminated, the dislocation density and the quantity of dislocated martensite are increased remarkably, and the shape and distribution of inclusions are improved by the addition of RE. Therefore, the mechanical properties of the modified steel can be greatly increased, especially the toughness (αK) by 44%, yield strength (σs) by 10%, and elongation (δ5) by 42%.

关键词： 31Mn2SiRE cast steel wear-resistance steel mechanical properties rare earths