Direct regeneration method has been widely concerned by researchers in the field of battery recycling because of its advantages of in situ regeneration,short process and less pollutant emission.In this review,we first...Direct regeneration method has been widely concerned by researchers in the field of battery recycling because of its advantages of in situ regeneration,short process and less pollutant emission.In this review,we firstly analyze the primary causes for the failure of three representative battery cathodes(lithium iron phosphate,layered lithium transition metal oxide and lithium cobalt oxide),targeting at illustrating their underlying regeneration mecha-nism and applicability.Efficient stripping of material from the collector to obtain pure cathode material has become a first challenge in recycling,for which we report several pretreatment methods currently available for subsequent regeneration processes.We review and discuss emphatically the research progress of five direct regeneration methods,including solid-state sintering,hydrothermal,eutectic molten salt,electrochemical and chemical lithiation methods.Finally,the application of direct regeneration technology in production practice is introduced,the problems exposed at the early stage of the industrialization of direct regeneration technol-ogy are revealed,and the prospect of future large-scale commercial production is proposed.It is hoped that this review will give readers a comprehensive and basic understanding of direct regeneration methods for used lithium-ion batteries and promote the industrial application of direct regeneration technology.展开更多
College students’major production practice is an important part of practical teaching in colleges and universities,a key link of major teaching system,a necessary link of undergraduate teaching training program and t...College students’major production practice is an important part of practical teaching in colleges and universities,a key link of major teaching system,a necessary link of undergraduate teaching training program and teaching plan,and an important form of combining classroom education with social practice.In order to meet the actual needs of college students’major production practice,this paper proposes the key links of establishing strategic cooperation relationship with enterprises and institutions by industry university research channels,ensuring the construction of practice base,changing the ideas of teachers and students,stimulating students’internal motivation,maintaining the goal of professional characteristics,adhering to the exploration of professional characteristics,strengthening the cultivation of comprehensive ability and improving the assessment mechanism of production practice to ensure the high quality of college students’major production practice and achieve the purpose of practice.展开更多
Due to the uncertainty of finished packaging for the production of niobium storage energy medium, it is required that parameters of the filling system can be adjusted, compared to the current market molding filling sy...Due to the uncertainty of finished packaging for the production of niobium storage energy medium, it is required that parameters of the filling system can be adjusted, compared to the current market molding filling system, most of which are aimed at a particular assembly line products, the mode is relatively fixed and expensive, this article is based on PLC and frequency conversion control technology, by changing the packing set quantitative and phase shifting process control technology. So that the system is superior to other similar systems in key indexes such as filling speed and filling precision, and has been successfully applied in production practice.展开更多
Pore structure characteristics,gas content,and micro-scale gas occurrence mechanisms were investigated in the Shan_(2)^(3)sub-member marine-continental transitional shale of the southeastern margin of the Ordos Basin ...Pore structure characteristics,gas content,and micro-scale gas occurrence mechanisms were investigated in the Shan_(2)^(3)sub-member marine-continental transitional shale of the southeastern margin of the Ordos Basin using scanning electron microscope images,lowtemperature N_(2)/CO_(2)adsorption and high-pressure mercury intrusion,methane isothermal adsorption experiments,and CH4-saturated nuclear magnetic resonance(NMR).Two distinct shale types were identified:organic pore-rich shale(Type OP)and microfracture-rich shale(Type M).The Type OP shale exhibited relatively well-developed organic matter pores,while the Type M shale was primarily characterized by a high degree of microfracture development.An experimental method combining methane isothermal adsorption on crushed samples and CH4-saturated NMR of plug samples was proposed to determine the adsorbed gas,free gas,and total gas content under high temperature and pressure conditions.There were four main research findings.(1)Marine-continental transitional shale exhibited substantial total gas content in situ,ranging from 2.58 to 5.73 cm^(3)/g,with an average of 4.35 cm^(3)/g.The adsorbed gas primarily resided in organic matter pores through micropore filling and multilayer adsorption,followed by multilayer adsorption in clay pores.(2)The changes in adsorbed and free pore volumes can be divided into four stages.Pores of<5 nm exclusively contain adsorbed gas,while those of 5-20 nm have a high proportion of adsorbed gas alongside free gas.Pores ranging from 20 to 100 nm have a high proportion of free gas and few adsorbed gas,while pores of>100 nm and microfractures are almost predominantly free gas.(3)The proportion of adsorbed gas in Type OP shale exceeds that in Type M,reaching 66%.(4)Methane adsorbed in Type OP shale demonstrates greater desorption capability,suggesting a potential for enhanced stable production,which finds support in existing production well data.However,it must be emphasized that high-gas-bearing intervals in both types present valuable opportunities for exploration and development.These data may support future model validations and enhance confidence in exploring and developing marine-continental transitional shale gas.展开更多
＂Our relation to the past is being transformed by digital media. Internet and digital databases increase the presence of the past and remake our connection to both past and present＂ （Manoff, 2010, p. 9）. The use o...＂Our relation to the past is being transformed by digital media. Internet and digital databases increase the presence of the past and remake our connection to both past and present＂ （Manoff, 2010, p. 9）. The use of archive footage in documentary filmmaking has increased significantly, since the digitalization of audio-visual archives. Access is facilitated by databases and different interfaces. The theorization about the particular impacts of archive footage on the documentary text has not received much attention as yet as archive usage has been seen as unproblematic and digital archives as just ＂handy＂. This paper is a first step in the development of a taxonomy of how archive footage is being used by documentary filmmakers, while taken into account the production practices and the processes of archivization of archive materials.展开更多
基金supported by the National Key Research and Development Program of China(No.2023YFC3904800)the Key Project of Jiangxi Provincial Research and Development Program(No.20223BBG74006)+5 种基金the Key Project of Ganzhou City Research and Development Program(No.2023PGX17350)“Thousand Talents Program”of Jiangxi Province(No.001043232090)Science&Technology Talents Lifting Project of Hunan Province(No.2022TJ-N16)Natural Science Foundation of Hunan Province(Nos.2024JJ4022 and 2023JJ30277)China Postdoctoral Fellowship Program(No.GZC20233205)the Open-End Fund for National-Local Joint Engineering Research Center of Heavy Metals Pollutants Control and Resource Utilization(ES202480184).
文摘Direct regeneration method has been widely concerned by researchers in the field of battery recycling because of its advantages of in situ regeneration,short process and less pollutant emission.In this review,we firstly analyze the primary causes for the failure of three representative battery cathodes(lithium iron phosphate,layered lithium transition metal oxide and lithium cobalt oxide),targeting at illustrating their underlying regeneration mecha-nism and applicability.Efficient stripping of material from the collector to obtain pure cathode material has become a first challenge in recycling,for which we report several pretreatment methods currently available for subsequent regeneration processes.We review and discuss emphatically the research progress of five direct regeneration methods,including solid-state sintering,hydrothermal,eutectic molten salt,electrochemical and chemical lithiation methods.Finally,the application of direct regeneration technology in production practice is introduced,the problems exposed at the early stage of the industrialization of direct regeneration technol-ogy are revealed,and the prospect of future large-scale commercial production is proposed.It is hoped that this review will give readers a comprehensive and basic understanding of direct regeneration methods for used lithium-ion batteries and promote the industrial application of direct regeneration technology.
基金the research project of postgraduate education and teaching reform of Xi’an University of Technology in 2020.
文摘College students’major production practice is an important part of practical teaching in colleges and universities,a key link of major teaching system,a necessary link of undergraduate teaching training program and teaching plan,and an important form of combining classroom education with social practice.In order to meet the actual needs of college students’major production practice,this paper proposes the key links of establishing strategic cooperation relationship with enterprises and institutions by industry university research channels,ensuring the construction of practice base,changing the ideas of teachers and students,stimulating students’internal motivation,maintaining the goal of professional characteristics,adhering to the exploration of professional characteristics,strengthening the cultivation of comprehensive ability and improving the assessment mechanism of production practice to ensure the high quality of college students’major production practice and achieve the purpose of practice.
文摘Due to the uncertainty of finished packaging for the production of niobium storage energy medium, it is required that parameters of the filling system can be adjusted, compared to the current market molding filling system, most of which are aimed at a particular assembly line products, the mode is relatively fixed and expensive, this article is based on PLC and frequency conversion control technology, by changing the packing set quantitative and phase shifting process control technology. So that the system is superior to other similar systems in key indexes such as filling speed and filling precision, and has been successfully applied in production practice.
基金the Science and Technology Cooperation Project of the CNPC-SWPU Innovation Alliance,China(No.2020CX030101)the National Natural Science Foundation of China(No.42222209)the Scientific Research and Technological Development Program of CNPC,China(No.2023ZZ0801).
文摘Pore structure characteristics,gas content,and micro-scale gas occurrence mechanisms were investigated in the Shan_(2)^(3)sub-member marine-continental transitional shale of the southeastern margin of the Ordos Basin using scanning electron microscope images,lowtemperature N_(2)/CO_(2)adsorption and high-pressure mercury intrusion,methane isothermal adsorption experiments,and CH4-saturated nuclear magnetic resonance(NMR).Two distinct shale types were identified:organic pore-rich shale(Type OP)and microfracture-rich shale(Type M).The Type OP shale exhibited relatively well-developed organic matter pores,while the Type M shale was primarily characterized by a high degree of microfracture development.An experimental method combining methane isothermal adsorption on crushed samples and CH4-saturated NMR of plug samples was proposed to determine the adsorbed gas,free gas,and total gas content under high temperature and pressure conditions.There were four main research findings.(1)Marine-continental transitional shale exhibited substantial total gas content in situ,ranging from 2.58 to 5.73 cm^(3)/g,with an average of 4.35 cm^(3)/g.The adsorbed gas primarily resided in organic matter pores through micropore filling and multilayer adsorption,followed by multilayer adsorption in clay pores.(2)The changes in adsorbed and free pore volumes can be divided into four stages.Pores of<5 nm exclusively contain adsorbed gas,while those of 5-20 nm have a high proportion of adsorbed gas alongside free gas.Pores ranging from 20 to 100 nm have a high proportion of free gas and few adsorbed gas,while pores of>100 nm and microfractures are almost predominantly free gas.(3)The proportion of adsorbed gas in Type OP shale exceeds that in Type M,reaching 66%.(4)Methane adsorbed in Type OP shale demonstrates greater desorption capability,suggesting a potential for enhanced stable production,which finds support in existing production well data.However,it must be emphasized that high-gas-bearing intervals in both types present valuable opportunities for exploration and development.These data may support future model validations and enhance confidence in exploring and developing marine-continental transitional shale gas.
文摘＂Our relation to the past is being transformed by digital media. Internet and digital databases increase the presence of the past and remake our connection to both past and present＂ （Manoff, 2010, p. 9）. The use of archive footage in documentary filmmaking has increased significantly, since the digitalization of audio-visual archives. Access is facilitated by databases and different interfaces. The theorization about the particular impacts of archive footage on the documentary text has not received much attention as yet as archive usage has been seen as unproblematic and digital archives as just ＂handy＂. This paper is a first step in the development of a taxonomy of how archive footage is being used by documentary filmmakers, while taken into account the production practices and the processes of archivization of archive materials.
