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Using highly concentrated chloride solutions to leach valuable metals from cathode-active materials in spent lithium-ion batteries

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Rare Metals 2021年第7期40卷 1971-1978页

作者： Ai-Fei Yi Zhao-Wu Zhu ya-hui liu Jian Zhang hui Su Tao Qi National Engineering Laboratory for Hydrometallurgical Cleaner Production Technology Institute of Process EngineeringChinese Academy of SciencesBeijing 100190China Key Laboratory of Green Process and Engineering Institute of Process EngineeringChinese Academy of SciencesBeijing 100190China School of Chemistry and Chemical Engineering University of Chinese Academy of SciencesBeijing 101407China

This study focused on the extraction of valuable metals from the cathode-active materials in spent lithiumion batteries using a high-concentration chloride *** effects of the concentrations of ammonium chloride(NH4 Cl),hydrochloric acid(HCl),and reductants such as hydrogen peroxide(H_(2)O_(2))and urea(CO(NH_(2))_(2))on metal extraction and chlorine production were studied *** leaching mechanism was analyzed,and a leaching model was *** was found that the addition of solid NH4 Cl to an HCl solution significantly improved the metal extraction capability of the latter and reduced the formation of chlorine gas by 96.0%compared to that only using *** activation energies for leaching Li,Ni,Co,and Mn were determined to be 30.4,38.5,30.6,and 38.2 kJ·mol^(-1),*** study demonstrates an environmentally friendly method for recycling metal resources from cathode-active materials and furthers understanding of how NH4 Cl inhibits chlorine production when leaching with mixed solutions of HCl and NH4 Cl.

关键词： Lithium-ion batteries Hydrochloric acid Ammonium chloride Chlorine gas

City-Bus-Route Demand-based Efficient Coupling Driving Control for Parallel Plug-in Hybrid Electric Bus

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Chinese Journal of Mechanical Engineering 2018年第3期31卷 168-178页

作者： Qin-Pu Wang Chao yang ya-hui liu Yuan-Bo Zhang Zhongtong Bus Hold Co. Ltd. State Key Laboratory of Automotive Safety and Energy Tsinghua University

Recently,plug?in hybrid electric bus has been one of the energy?e cient solutions for urban transportation. However,the current vehicle e ciency is far from optimum,because the unpredicted external driving conditions are di cult to be obtained in advance. How to further explore its fuel?saving potential under the complicated city bus driving cycles through an e cient control strategy is still a hot research issue in both academic and engineering area. To realize an e cient coupling driving operation of the hybrid powertrain,a novel coupling driving control strategy for plug?in hybrid electric bus is presented. Combined with the typical feature of a city?bus?route,the fuzzy logic inference is employed to quantify the driving intention,and then to determine the coupling driving mode and the gear?shifting strategy. Considering the response deviation problem in the execution layer,an adaptive robust controller for electric machine is designed to respond to the transient torque demand,and instantaneously compensate the response delay and the engine torque fluctuation. The simulations and hard?in?loop tests with the actual data of two typical driving conditions from the real?world city?bus?route are carried out,and the results demonstrate that the pro?posed method could guarantee the hybrid powertrain to track the actual torque demand with 10.4% fuel economy improvement. The optimal fuel economy can be obtained through the optimal combination of working modes. The fuel economy of plug?in hybrid electric bus can be significantly improved by the proposed control scheme without loss of drivability.

关键词： Hybrid electric vehicle Single?shaft parallel electromechanical powertrain Coupling driving mode Adaptive robust control

Properties of Fe-Mn-Al alloys with different Mn contents using density functional theory

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Rare Metals 2023年第4期42卷 1387-1397页

作者： Xiang Luo Jing Feng ya-hui liu Ming-Yu Hu Xiao-Yu Chong Ye-Hua Jiang Faculty of Materials Science and Engineering Kunming University of Science and TechnologyKunming650093China

The chemical stability,electronic structures,mechanical properties and Debye temperature of Fe-MnAl alloys were investigated using first-principles *** formation enthalpy and cohesive energy are negative for Fe-Mn-Al alloys,showing that they are thermodynamically *** has the lowest formation enthalpy,indicating that FeAl is the most stable alloy in the Fe-Mn-Al *** partial density of states,total density of states and electron density distribution maps were used to analyze the physical properties of the Fe-MnAl alloys.A combination of mainly covalent and metallic bonds exists in these Fe-Mn-Al alloys,resulting in good electronic conductivity,high melting points,and high *** alloys display disparate anisotropy due to the calculated different shapes of the 3D curved surface of the Young's modulus and anisotropic *** has the highest bulk modulus,shear modulus and Yong's modulus of 187.1,119.8 and 296.2 GPa,***,the Debye temperatures and sound velocity of these Fe-Mn-Al compounds were explored.

关键词： Fe-Mn-Al alloys Electronic structures Stability Mechanical properties Debye temperature First-principles calculation

Impact of immunotherapy on liver metastasis

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World Journal of Gastrointestinal Surgery 2024年第7期16卷 1969-1972页

作者： Zhuo Fu Ming-Wei Wang ya-hui liu yan Jiao Medical College Inner Mongolia Minzu UniversityTongliao 028000Inner Mongolia Autonomous RegionChina Ministry of Health Key Laboratory of Radiobiology School of Public Health of Jilin UniversityChangchun 130000Jilin ProvinceChina Department of Hepatobiliary and Pancreatic Surgery General Surgery CenterThe First Hospital of Jilin UniversityChangchun 130021Jilin ProvinceChina

This editorial discusses the article“Analysis of the impact of immunotherapy efficacy and safety in patients with gastric cancer and liver metastasis”published in the latest edition of the World Journal of Gastrointestinal *** has achieved outstanding success in tumor ***,the presence of liver metastasis(LM)restrains the efficacy of immunotherapy in various tumors,including lung cancer,colorectal cancer,renal cell carcinoma,melanoma,and gastric cancer.A decrease in CD8+T cells and nature killer cells,along with an increase in macrophages and regulatory T cells,was observed in the microenvironment of LM,leading to immunotherapy *** studies are necessary to determine the best strategy for enhancing the effectiveness of immunotherapy in patients with LM.

关键词： Immunotherapy Liver metastasis Tumor microenvironment Resistance T cells

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World Journal of Gastroenterology 2013年第48期19卷 9490-9494页

作者： Li-Mei Qu ya-hui liu David R Brigstock Xiao-Yu Wen Yong-Fang liu ya-Jun Li Run-Ping Gao Department of Hepatic-Biliary-Pancreatic Medicine First Hospital Jilin University Department of Hepatic-Biliary-Pancreatic Surgery First Hospital Jilin University The Research Institute at Nationwide Children’s Hospital Columbus OH 43205 United States Division of Pediatric Surgery Department of Surgery The Ohio State University Columbus OH 43205United States

Autoimmune pancreatitis(AIP)is a form of chronic pancreatitis that is categorized as type 1 or type 2according to the clinical *** 1 AIP,which predominantly presents in a few Asian countries,is a hyper-IgG4-related *** report a case of IgG4-related AIP overlapping with Mikulicz’s disease and lymphadenitis,which is rare and seldom reported in literature.A 63-year male from Northeast China was admitted for abdominal distension lasting for one *** presented symmetric swelling of the parotid and submandibular glands with slight dysfunction of salivary secretion for 6 *** had a 2-year history of bilateral submandibular lymphadenopathy without *** underwent surgical excision of the right submandibular lymph node one year prior to *** denied any history of alcohol,tobacco,or illicit drug *** examination revealed high fasting blood sugar level(8.8 mmol/L)and high level of IgG4(15.2 g/L).Anti-SSA or anti-SSB were *** tomography of the abdomen showed a diffusely enlarged pancreas with loss of *** stain for IgG4 demonstrated diffuse infiltration of IgG4-positive plasma cells in labial salivary gland and lymph node biopsy *** patient received a dose of 30 mg/d of prednisone for three *** this three-week follow-up,the patient reported no discomfort and his swollen salivary glands,neck lymph node and pancreas had returned to normal *** patient received a maintenance dose of 10mg/d of prednisone for 6 mo,after which his illness had not recurred.

关键词： IgG4-related disease Type 1 autoimmune pancreatitis Mikulicz’s disease Lymphadenitis

Removal of zirconium from hydrous titanium dioxide

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International Journal of Minerals,Metallurgy and Materials 2013年第1期20卷 1-8页

作者： Xue-qin Ma ya-hui liu Jing-long Chu Jie Li Tian-yan Xue Li-na Wang Tao Qi National Engineering Laboratory for Hydrometallurgical Cleaner Production Technology Institute of Process Engineering Chinese Academy of Sciences Key Laboratory of Green Process and Engineering Institute of Process Engineering Chinese Academy of Sciences Graduate University of Chinese Academy of Sciences

A method was proposed for removing zirconium （Zr） from hydrous titanium dioxide （HTD） by the NaF solution. The effects of main parameters, i.e. pH values, NaF dosage, temperature and retention time, on the removal of zirconium were stud- ied. The optimal conditions were found as the following： pH value, 〈5.5; molar ratio of NaF to TiQ, 0.6; retention time, 80 min and temperature, 80℃. The removal rate of Zr under the optimized conditions was above 87.7%. The adsorption energy of the preferential absorption of hydrofluoric acid for Zr（OH）2SOt（OH2） on the （001） crystal surface of HTD was determined by theo- retical calculation. The possible mechanism of the removal process was also discussed.

关键词： zirconium titanium dioxide removal density functional theory microstructure adsorption

A method for recovery of iron,titanium,and vanadium from vanadium-bearing titanomagnetite

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International Journal of Minerals,Metallurgy and Materials 2018年第2期25卷 131-144页

作者： Yi-min Zhang Li-na Wang De-sheng Chen Wei-jing Wang ya-hui liu Hong-xin Zhao Tao Qi University of Chinese Academy of Sciences Beijing 100049China National Engineering Laboratory for Hydrometallurgical Cleaner Production Technology Beijing 100190China Key Laboratory of Green Process and Engineering Institute of Process EngineeringChinese Academy of SciencesBeijing 100190China

An innovative method for recovering valuable elements from vanadium-bearing titanomagnetite is proposed. This method involves two procedures： low-temperature roasting of vanadium-bearing titanomagnetite and water leaching of roasting slag. During the roasting process, the reduction of iron oxides to metallic iron, the sodium oxidation of vanadium oxides to water-soluble sodium vanadate, and the smelting separation of metallic iron and slag were accomplished simultaneously. Optimal roasting conditions for iron/slag separation were achieved with a mixture thickness of 42.5 mm, a roasting temperature of 1200°C, a residence time of 2 h, a molar ratio of C/O of 1.7, and a sodium carbonate addition of 70 wt%, as well as with the use of anthracite as a reductant. Under the optimal conditions, 93.67% iron from the raw ore was recovered in the form of iron nugget with 95.44% iron grade. After a water leaching process, 85.61% of the vanadium from the roasting slag was leached, confirming the sodium oxidation of most of the vanadium oxides to water-soluble sodium vanadate during the roasting process. The total recoveries of iron, vanadium, and titanium were 93.67%, 72.68%, and 99.72%, respectively.

关键词： recovery vanadium titanomagnetite direct reduction sodium oxidation smelting separation water leaching

Fabrication of Highly Anisotropic and Interconnected Porous Scaffolds to Promote Preosteoblast Proliferation for Bone Tissue Engineering

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Chinese Journal of Polymer Science 2021年第9期39卷 1191-1199页

作者： ya-hui liu Wei liu Zi-Li Zheng Xin Wei Nouman Ali Shah Hao Lin Bai-Song Zhao Shi-Shu Huang Jia-Zhuang Xu Zhong-Ming Li College of Polymer Science and Engineering State Key Laboratory of Polymer Materials EngineeringSichuan UniversityChengdu 610065China Department of Anesthesiology Guangzhou Women and Children's Medical CenterGuangzhou 510623China Department of Orthopaedic Surgery West China HospitalSichuan UniversityChengdu 610065China

Mimicking the complex structure of natural bone remains a challenge for bone tissue *** this study,a novel processing strategy was developed to prepare the bone-like scaffolds that are featured by highly oriented and fully interconnected *** type of biomimetic scaffolds was evolved from solid phase stretching of immiscible polycaprolactone(PCL)/poly(ethylene oxide)(PEO)blends with cocontinuous structure and the pore morphology was inherited from selective extraction of water soluble PEO *** pore anisotropy was readily tuned by varying the stretching strain without loss of *** promotion in preosteoblast proliferation,alkaline phosphatase activity and osteogenic gene expression was observed in the oriented porous scaffolds compared to the isotropic porous *** oriented architecture provided a topographical cue for aligned growth of preosteoblasts,which activated the Wnt/β-catenin signaling *** proposed strategy enriches the toolbox for the scaffold design and fabrication for bone tissue engineering.

关键词： Porous scaffold Pore anisotropy Polymer blend Co-continuous structure Tissue engineering

Improved discriminative training for generative model

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The Journal of China Universities of Posts and Telecommunications 2009年第3期16卷 126-130页

作者： WU ya-hui,GUO Jun,liu Gang Laboratory of Pattern Recognition and Intelligent System,Beijing University of Posts and Telecommunications,Beijing 100876,China [a]Laboratory of Pattern Recognition and Intelligent System Beijing University of Posts and Telecommunications Beijing 100876 China

This article proposes a model combination method to enhance the discriminability of the generative model. Generative and discriminative models have different optimization objectives and have their own advantages and drawbacks. The method proposed in this article intends to strike a balance between the two models mentioned above. It extracts the discriminative parameter from the generative model and generates a new model based on a multi-model combination. The weight for combining is determined by the ratio of the inter-variance to the intra-variance of the classes. The higher the ratio is, the greater the weight is, and the more discriminative the model will be. Experiments on speech recognition demonstrate that the performance of the new model outperforms the model trained with the traditional generative method.

关键词： model combination discriminability generative model training speech recognition