Abstract:In order to vertify the thermal insulation effect of vacuum shell used in thermal battery,the same thermal battery stack were assembled with stainless steel double-walled vacuum shell and stainless steel shell with glass fiber insulation structure respectively,which were activated at a current density of 60 mA/cm2,and then the electrical properties and surface temperature of the shell were tested.The results showed that the average working time of vacuum shell at high,low and normal temperature was 624 s longer than that of the thermal battery assembled by ordinary shell insulation,and output energy increased by 45%.The maximum temperature on the side surface of the shell decreased from 221℃to 140℃,and the timing of the maximum temperature delayed from 315 s to 540 s,indicating that the vacuum shell has high insulation effect when uesd in thermal battery.This conclusion is expected to provide a reference for the design and development of long life thermal batteries.

Abstract:Cobalt tetraoxide(Co3O4)is a key raw material for lithium cobalt oxide(LiCoO2),an anode material for lithium-ion batteries.The aim of this study is to reduce the sulfur content(mass fraction)in cobalt tetraoxide by optimizing the washing and desulfurization process in order to improve the battery performance.Through the experimental study,the washing and desulfurization effects of pure water,ammonium bicarbonate solution and sodium hydroxide solution were investigated,and the optimal process conditions for washing with the three kinds of washing liquids were determined.Under these conditions,the sulfur content of tricobalt tetraoxide could be controlled within 2×10-4,1×10-4 and 1×10-5 respectively,and would not cause the change of the particle size distribution and the microscopic morphology.

Abstract:With the widespread application of liquid lithium batteries in various fields,people have put forward higher requirements for the performance and safety of batteries.As one of the key components of lithium batteries,the separator plays a crucial role in the performance and safety of the battery.However,there isn't a testing system that can quickly evaluate the permeability of different types of lithium battery diaphragms.To address this issue,this article designs a permeability evaluation testing system based on LabVIEW software.Through verification,the system can quickly compare the permeability of different lithium battery diaphragms under different temperature conditions,thereby evaluating the permeability performance of different lithium battery diaphragms.The design and implementation of this system provides an effective tool for the lithium battery industry,which helps to improve battery performance and safety,and promote the development of lithium battery technology.

Abstract:Against the backdrop of accelerating global carbon neutrality strategies,the large-scale retirement of lithium-ion batteries has created an increasingly urgent demand for green electrolyte recycling.However,traditional recycling processes face dual safety challenges:volatile losses of organic solvents and the production of highly toxic hydrofluoric acid from lithium salt hydrolysis.This paper focuses on the innovative application of supercritical carbon dioxide fluid technology,systematically investigating its key mechanisms in the resource recovery of waste electrolytes:elucidating the selective extraction principle for carbonate solvents based on density-tunable solvation effects;overcoming compatibility limitations for highly polar components through polar entrainment agents;and achieving safe lithium salt separation by leveraging the inherently low solubility of ionic compounds in nonpolar supercritical systems.This research aims to provide theoretical and technical foundations for developing efficient,environmentally sustainable electrolyte recycling processes.

Abstract:With the development and advancement of modern science and technology,lithium primary batteries have been widely used in medical equipment,military industry,consumer electronics and other fields,resulting in a continuous increase in market demand.Their safety issues have attracted widespread attention from all sectors.The standard IEC 60086-4:2025 Primary batteries-Part 4:Safety of lithium batteries provides strict guidance and explanations for the safety testing and compliance of lithium primary batteries.This article will conduct an analysis from the aspects of the standard's drafting background,test items,test methods,and precautions during the usage process,with the aim of providing reference for the detection and safe use of lithium primary batteries.

Abstract:In this study,the temperature rise characteristics and heating law of lithium ion battery under large rate charge and discharge state are revealed,and the performance test of water cooling system is carried out for the battery module.The experimental results show that compared with the liquid-cooled cell battery,the liquid cooling scheme can significantly reduce the surface temperature and improve the cooling effect with the cooling water flow.

Abstract:With the wide application of electric vehicles and renewable energy storage systems,the insulation performance of battery packs is increasingly becoming a key technical indicator.This paper focuses on the design and analysis of the thermal insulation performance of the module-less battery pack,taking the battery pack of a pure electric vehicle as an example,using the principle of heat transfer to analyze its box,and identifying the main factors affecting the thermal insulation performance of the battery pack.The battery pack was modeled in three dimensions using CATIA software,and the temperature field of the battery pack was simulated using the heat flow coupling method in Star-CCM+.The results show that the cooling rate of the core is about 3.67℃/h when the core held at-20℃for 6h,and the warming rate of the core at 55℃is 2.83℃/h.The experiment and simulation results show that the insulation layer of the battery pack can meet the insulation requirements effectively and has a good application prospect.

Abstract:In this paper,the influence of overcharge at different rates on the impedance of three-electrode Li-ion battery was studied.The impedance changes of the battery at different SOCs before and after overcharge were analyzed through the experiments of 0.2 C overcharge.The results show that the total impedance of the overcharged battery increases significantly,especially the charge transfer impedance(Rct)and the membrane impedance(Rf).Additionally overcharge can increase the peak corresponding to the membrane impedance in the DRT curve,along with changes in the composition of the membrane impedance.

Abstract:This paper mainly studies the effect of the aqueous binder polyacrylic acid(PAA)on the performance of LiFePO4 lithium-ion batteries.By adding aqueous binder PAA,the processing performance of negative electrode slurry was studied,and make PAA into a full battery to study its electrochemical properties.The result shows that the resistance is reduced and the peel force is correspondingly increased after adding PAA.And the battery performance with PAA is significantly better than that without PAA.The rate performance and high temperature performance is optimized.The capacity retention rate of 950 cycles of 1 C/1 C at room temperature is 94.32%and 89.12%respectively;for high temperature(45℃)1 C/1 C cycles 500 cycles,the battery capacity retention rate is 93.46%and 91.40%.

Abstract:The rapid evolution of the new energy industry demands multidisciplinary competencies from electrochemical professionals.This study examines the specific talent requirements in industrialization processes,identifies structural challenges in current university education including outdated curricula,disconnect between practical training and industry needs,and superficial industry-academia integration and proposes reform strategies across three dimensions:curriculum design,teaching methodologies,and collaborative models.The research aims to provide targeted solutions for optimizing electrochemistry talent development systems in Chinese universities,thereby enhancing the alignment between academic training and industrial demands.

Abstract:At the critical stage of the global new energy industry's transformation towards intelligence,the traditional single-discipline training model is no longer capable of meeting the industry's demands.The integration of industry and education has become the key path to resolving the structural contradiction between talent supply and industry demand.This article,based on the typical case of Suzhou Polytechnic Institute of Agriculture,analyzes the specific implementation paths and achievements of the new energy intelligent manufacturing talent training model under the integration of industry and education,and puts forward optimization suggestions such as deepening industry-university-research collaboration and expanding digital platforms,with the aim of providing theoretical references and practical guidance for the training of new energy intelligent manufacturing talents.

Abstract:With the popularity of fuel cell commercial vehicles,ensuring the stability and durability of their fuel cell systems has become increasingly crucial.The team conducted 8 600 start-stop cycle tests and over 2 000 hours of durability testing on the FY06-S80 system.The test results indicate that under appropriate operating conditions,frequent start-stop does not significantly affect the performance of the fuel cell stack.But prolonged variable operating condition testing can lead to thinning and cracking of the catalytic layer in the cathode air inlet area of the membrane electrode,along with reduced hydrophobicity of the membrane electrode assembly.Additionally,corrosion-induced resistance increases were observed at identical positions on the bipolar plates.Based on these preliminary findings,subsequent validation tests were adjusted to include reduced air inlet humidity and stack temperature,with operational time parameters calibrated accordingly.

Abstract:In the production and application of lithium-ion batteries,electrical performance testing is an indispensable and crucial step.Electrical performance testing of lithium-ion batteries is a core aspect that ensures their safety and optimizes research and development.This study addresses the testing requirements for key electrical performance indicators(capacity,capacity retention rate,cycle stability)of lithium-ion batteries by employing multiple charge-discharge cycling test schemes.By collecting data under different charge-discharge schemes,corresponding voltage-capacity curves and capacity fade curves are plotted.The tests show that testing conditions such as temperature,cut-off voltage,and rate all affect the capacity retention rate of lithium-ion batteries,leading to a noticeable decrease in battery life.The decay curves generated through data visualization clearly identify the process of battery capacity fade.This study not only provides quantitative criteria for screening lithium-ion batteries but also offers data support for their research and development.

Abstract:In electrochemical energy storage,sodium-ion batteries(SIBs),with abundant resources and cost advantages,are a large-scale energy storage technology with great industrialization potential.Among cathode materials,polyanionic materials show excellent cycling stability and voltage plateau characteristics due to their stable structures and inductive effects.This study designed and fabricated a NASICON-type Na3-xV2-xTix(PO4)3@C(0≤x≤1)cathode material with Ti gradient substitution and dual-phase carbon coating for synergistic optimization.Rietveld refinement and EDS confirmed uniform Ti distribution in the lattice,inducing lattice contraction to expand sodium-ion diffusion channels.A 3D conductive network of in-situ amorphous carbon and carbon nanotubes was built via liquid-phase coating,enhancing electronic conductivity.The optimal Ti substitution and carbon-coating method were identified.Electrochemical tests showed NVP-Ti0.2@C delivered 115.01 mAh/g at 0.1 C,90.98 mAh/g at 10 C,and 95%capacity retention after 320 cycles at 1 C,offering a new strategy for synergistically optimizing the bulk and interfacial properties of polyanionic cathodes for SIBs.

Abstract:This study,grounded in the Four-Spiral Model,explores collaborative pathways for advancing digital transformation in the lithium battery industry.The research identifies challenges in Yichun region,including fragmented collaborative mechanisms and data silos,highlighting the need to strengthen organizational support systems and resource activation frameworks while accelerating data-driven initiatives and green transition.Policy recommendations include establishing a Digital Transformation Promotion Center,developing an industrial data platform,and implementing digital supervision mechanisms.These measures aim to foster supply chain integration and value-sharing,providing theoretical and practical references for building a digital lithium battery industry cluster.

Abstract:This study pioneers the development of a novel phase change material(PCM).By employing techniques including molecular polarity modulation,low-temperature solvothermal self-assembly,and temperature-zone regulation,it comprehensively addresses technical challenges in traditional PCM such as phase fault,high energy consumption in synthesis,and fixed temperature zones.Leveraging a dynamic hydrogen-bonding network,this material allows an inorganic salt composite system to completely avoid phase separation after 5 000 times cycles,while maintaining a phase change enthalpy retention rate exceeding 98%.The innovative low-temperature synthesis process(≤80℃)reduces energy consumption by 60%compared to conventional melting methods and endows the material with a high thermal conductivity of 0.688 W/(m·K).This PCM can precisely set phase change temperatures across a wide temperature range of-10 to 80℃,with its thermal conductivity automatically increasing as temperature rises,improving temperature control accuracy to±0.3℃.During fast-charging in energy storage applications,the PCM maximums battery temperature below 45℃(with a temperature differential under 1.5℃),extending cycle life by 50%.During fast charging in energy storage applications,the PCM maintains battery temperatures below 45℃(with a temperature difference<1.5℃),extending battery cycle life by 50%.In applications such as chemical battery storage and cold chain systems,the material significantly enhances system energy efficiency and operational temperature stability.This research provides a highly stable,low-energy,and intelligent solution for thermal management systems across multiple scenarios,demonstrating significant engineering value and broad market potential.

Abstract:This study collects in-situ X-ray diffraction(XRD)data during the charging and discharging cycles of lithium-ion batteries with different cathode and anode materials.Through the analysis of the obtained series spectra,the lithium ion intercalation and deintercalation behavior,lattice expansion and contraction,valence state transitions of various metal elements,phase transition processes and the coexistence of multiphase in the reaction process of the internal materials of the battery are studied,so as to obtain the evolution law of the microstructure and lattice parameters of the material.This analytical method is helpful to determine the key characteristics of lithium-ion batteries in different stages of the reaction process.

Abstract:Iron-based sulfide nanomaterials have shown broad application prospects in the fields of energy storage and conversion,electrochemical synthesis and catalysis,sensors,etc.,due to their abundant reserves,low cost,high theoretical capacity and tunable electronic structure.This paper reviews the application research progress of iron-based sulfide nanomaterials in the fields of lithium/sodium-ion batteries,supercapacitors,electrocatalytic water splitting,electrocatalytic oxidation of pollutant degradation,etc.It focuses on discussing their structural design,performance optimization strategies and practical application situations,and looks forward to the challenges and directions of future development.

Abstract:With the rapid development of the global new energy vehicle industry,the power battery industry,as its core component,has ushered in unprecedented market opportunities.However,it also faces a problem of a serious shortage of high-quality technical and skilled personnel who are proficient in advanced processes and equipment.Therefore,this article explores in depth how to construct and implement an"order based"talent training model for power battery enterprises,and proposes strategies such as establishing a long-term communication mechanism between schools and enterprises,continuously optimizing the curriculum and teaching system,strengthening incentives and rights protection,in order to provide effective solutions for enterprises to solve the problem of"difficult employment".

Abstract:With the popularization of new energy vehicles,the retirement of power batteries in our country has surged.The total amount of retired power batteries in 2023 will exceed 580,000 tons,and the actual recycling volume will reach 654 000 tons in 2024,of which lithium iron phosphate batteries will account for 61.2%.Although the recycling and dismantling capacity of"whitelisted"enterprises has reached 2.191 million tons/year,the actual recycling rate of whitelisted enterprises is insufficient.The mainstream of the industry adopts hydrometallurgical process(accounting for more than 80%).This paper summarizes the wastewater generated in the process of lithium-ion batteries recycling from different source,the waste gas generated in different process stages,and the industrial solid waste generated in different recycling processes.