In the burgeoning landscape of energy storage, sodium - ion batteries have emerged as a promising alternative to their lithium - ion counterparts, primarily due to the abundant availability of sodium resources globally. Among the various materials being explored for sodium - ion batteries, Sodium Vanadium Phosphate (Na₃V₂(PO₄)₃, abbreviated as NVP) has garnered significant attention in recent times.   The Promise of Sodium - Ion Batteries As the world races towards a more sustainable energy future, the demand for efficient and cost - effective energy storage solutions is skyrocketing. Lithium - ion batteries, which currently dominate the market, face challenges such as limited lithium reserves and high costs associated with lithium extraction. Sodium, on the other hand, is the sixth most abundant element in the Earth's crust and is widely available in seawater and salt mines. This abundance makes sodium - ion batteries an attractive option for large - scale energy storage, including grid - scale applications and electric vehicles.   NVP: Structure and Basics NVP belongs to the family of polyanionic phosphate materials. It features a stable NASICON(Na Super Ionic CONductor) - type three - dimensional structure. This unique structure provides several advantages. The open framework of the NASICON structure allows for fast sodium - ion diffusion, creating rapid diffusion channels for sodium ions to move in and out during the charging and discharging processes of the battery. Additionally, the strong covalent bond interactions between the PO₄³⁻ groups contribute to the high structural stability of NVP. During charge - discharge cycles, NVP experiences only a relatively small volume change of about 8.26%, which is crucial for ensuring the long - term cycle stability of sodium - ion batteries.     Electrochemical Performance of NVP In terms of its electrochemical performance, NVP exhibits distinct characteristics. During charging and discharging, NVP shows two prominent electrochemical platforms. One is near 1.6 V, corresponding to the V²⁺/V³⁺ redox couple, and the other is around 3.4 V, associated with the V³⁺/V⁴⁺ redox reaction. At 3.4 V, a reversible two - phase reaction occurs, represented by the equation Na₃V₂(PO₄)₃↔NaV₂(PO₄)₃, which can deliver a specific capacity of approximately 118 mAh g⁻¹.   However, like many electrode materials, NVP also has its limitations. The (PO₄) tetrahedra in the NVP lattice have low electrical conductivity, which isolates the V atoms, resulting in poor intrinsic electronic conductivity. Moreover, during repeated charge - discharge cycles, NVP is susceptible to significant structural stress and volume changes. These factors lead to slow sodium - ion diffusion kinetics, severely restricting its cycling stability and rate performance, and thus hindering its widespread commercial application.   Recent Advancements in NVP - Based Materials   1. Carbon Material Modification One of the...

The manufacturing process of sodium-ion batteries can generally be divided into several key steps: raw material preparation, cathode and anode material production, electrolyte and separator preparation, electrode fabrication, cell assembly, and finished product testing and inspection. Compared to the production process of lithium-ion batteries, sodium-ion batteries differ in raw material selection and certain process steps, but the overall workflow is similar. Their packaging forms are alike (cylindrical, pouch, prismatic aluminum shells, etc.), their production processes largely overlap, and their production lines are compatible (including electrode manufacturing and cell assembly). The main distinction lies in the fact that sodium-ion batteries can use aluminum foil as the anode current collector, allowing both cathode and anode tabs to be connected using aluminum tabs. This simplifies the tab welding process. Raw Material Preparation The main raw materials for sodium-ion batteries include cathode materials, anode materials, electrolyte, separators, and battery casings. The selection and quality of these materials directly impact the battery's performance and lifespan. Cathode and anode materials are the core components of sodium-ion batteries, and their performance differences determine the battery's energy density and charge-discharge efficiency. Electrolyte serves as the medium for sodium-ion transport within the battery. Separators are used to isolate the cathode and anode, preventing short circuits. Battery cases are critical components that protect the battery structure and ensure sealing integrity. Cathode Material Preparation The cathode material is a critical component of sodium-ion batteries. Commonly used cathode materials include polyanionic compounds, layered oxides, and Prussian blue analogs. Among these, polyanionic cathode materials have become a research focus due to their stable structure and excellent cycling performance. Synthesis methods include solid-state reactions, sol-gel processes, and hydrothermal methods. The electrochemical performance of cathode materials can be enhanced by optimizing synthesis conditions and employing doping modifications. Anode Material Preparation Common anode materials include carbon-based materials and alloy-based materials. Carbon-based materials, known for their high conductivity and stability, are widely used in sodium-ion batteries. Preparation methods such as pyrolysis and chemical vapor deposition (CVD) are employed, followed by coating and drying processes. The electrochemical performance of anode materials can be improved by controlling pore structure and specific surface area. Electrolyte and Separator Preparation The composition of the electrolyte directly affects the ionic conductivity and stability of the battery. The electrolyte primarily consists of a solute, solvent, and additives—typically sodium salts dissolved in organic solvents. Common solvents include esters and ethers, wh...

Lithium-ion batteries (LIBs) serve as the cornerstone of modern energy storage systems, with their performance heavily dependent on the selection and optimization of electrode materials. Among various anode materials, high-carbon graphite mesocarbon microbeads (MCMB) have emerged as a prominent candidate due to their unique structural characteristics and superior electrochemical properties. This article explores the application of high-carbon graphite MCMB in LIB anodes, focusing on its material properties, performance advantages, and practical applications. High-carbon graphite MCMB is a spherical carbon material derived from mesophase pitch through thermal treatment. Its microstructure exhibits a highly ordered layered arrangement, which provides excellent electrical conductivity and mechanical stability. Technical specifications reveal a uniform particle size distribution, with D10, D50, and D90 values of 9.534 μm, 16.342 μm, and 27.019 μm, respectively. This consistency enhances electrode compaction density and cycling stability. Additionally, the material’s tap density (1.211 g/cm³) and specific surface area (1.165 m²/g) optimize lithium-ion transport pathways, minimizing polarization during charge-discharge cycles. In terms of electrochemical performance, high-carbon graphite MCMB demonstrates an impressive initial discharge capacity of 340.5 mAh/g and a first-cycle efficiency of 94.3%. The high initial efficiency indicates minimal irreversible capacity loss during the first cycle, which is crucial for improving overall energy density and cycle life. Furthermore, the material exhibits exceptional purity, with a fixed carbon content of 99.959% and a moisture content as low as 0.035%, ensuring stability under high-voltage and high-temperature conditions. A key advantage of high-carbon graphite MCMB is its broad applicability across different battery types. It performs exceptionally well in both power batteries and cylindrical cells. In the context of electric vehicles, the material’s long cycle life and high-rate capability meet the demands for durability and fast charging. For portable electronics, its high energy density and structural stability provide reliable power solutions. Moreover, the material’s low moisture content and high purity make it suitable for high-end battery applications with stringent environmental requirements. From an industrial perspective, the production of high-carbon graphite MCMB has reached a mature stage, with technical parameters and performance metrics aligning with industry-leading standards. Strict control over particle size, density, and purity during manufacturing ensures consistent and high-quality raw materials for battery producers. Additionally, suppliers offer a one-year limited warranty and lifetime technical support, reducing user risk and enhancing market competitiveness. In conclusion, high-carbon graphite MCMB stands out as an ideal anode material for lithium-ion batteries, owing to its unique st...

AOTELEC Company has recently successfully completed the shipment of core equipment such as lithium battery sealing machines and winding machines, which are about to be delivered to important overseas partners. This delivery is not only a direct demonstration of the company's technical strength, but also pushes the cooperation between both sides into a brand-new stage. In the lithium battery production process, each piece of equipment has a clear division of labor and is of vital importance. The sealing machine, through high-precision welding technology, tightly seals the battery casing and internal components, preventing electrolyte leakage from the source and ensuring the stability and service life of the battery operation. The winding machine relies on an intelligent control system to precisely stack and wind positive and negative electrode sheets and separators. The process accuracy directly determines the core performance of the battery such as capacity and internal resistance. The grooving machine specializes in the processing of cylindrical battery casings. Through precise rolling and forming, it ADAPTS to the grooves, laying a solid foundation for battery sealing and assembly. The spot welding machine uses pulsed current to achieve a firm fusion of electrodes and electrode sheets, ensuring the efficient conduction of electrical energy. The slitting machine, with its precise cutting technology, cuts electrode sheets and diaphragms into standard specifications, enhancing material utilization and product uniformity. The coating machine evenly coats the active slurry onto the metal foil, playing a crucial role in the energy density and charging and discharging efficiency of the battery. We would like to express our sincere gratitude to our foreign customers for their long-term trust and support. We will continue to provide our customers with high-quality equipment and comprehensive technical services, helping them enhance their competitiveness in the field of lithium battery production and jointly create new glories for the industry.

On the occasion of the approaching traditional Chinese festival, the Dragon Boat Festival, AOTELEC sincerely extend our festival greetings to you. We wish you a happy life and all the best! According to the legal holiday schedule in China, our company will have a three-day holiday from May 31, 2025 to June 2, 2025, and resume normal work on June 3. If you have any urgent matters to contact us during this period, we will do our best to respond to your needs in a timely manner. However, due to limited resources during the holiday period, the response may be slightly delayed. We hope to have your understanding. For the orders currently under negotiation, we suggest that you communicate with us in advance about the order details and requirements so that we can arrange production and delivery for you in a timely manner after the holiday to ensure the smooth progress of the project. For customers who have placed orders, we will make corresponding preparations before the festival.

As the global energy transition accelerates, sodium-ion batteries (SIBs) are emerging as a critical complement to lithium-ion technologies, thanks to their abundant resources and low cost. Today, a revolutionary advancement enters the market: ultra-stable sodium metal chips have achieved industrial-scale production, marking a new era in SIB commercialization. Technological Leap: Redefining Sodium Metal Anode Standards Traditional sodium metal anodes have long faced three major challenges: unstable interfaces due to high reactivity, safety risks from dendrite growth, and oxidation sensitivity during processing. The newly developed sodium metal sheets overcome these barriers through three key innovations: 1. Ultra-High-Purity Base Material (≥99.99%) A vacuum distillation–zone melting hybrid process reduces impurities to <10 ppm (90% lower than industry standards), minimizing side reactions. Third-party tests confirm 500+ cycles at 1C with 91% capacity retention. 2. Biomimetic Composite Interfacial Layer An atomic-layer-deposited (ALD) artificial SEI layer delivers: Ionic conductivity of 8.3×10⁻³ S/cm (near liquid-electrolyte levels) 98% dendrite suppression (validated by synchrotron in situ imaging) 72-hour air stability (<0.1% oxidation weight gain without encapsulation) 3. Modular Thickness Control (0.05–1.2 mm) A precision rolling technology enables customization for diverse battery systems: (1)0.05 mm sheets: For cells exceeding 200 Wh/kg (2)0.8 mm standard: Compatible with hard carbon/Prussian blue cathodes (3)1.2 mm reinforced: Designed for long-duration energy storage Industrialization: From Lab to Gigawatt-Scale Production Current milestones include: (1)Pilot phase: Co-developed 280 Ah energy storage cells with CATL (185 Wh/kg, 82% capacity retention at -30°C) (2)Production lines: 1,000-ton/year capacity in Sichuan (Q4 2024), scaling to 5,000 tons by 2025 (3)Cost: Projected at $50/kg at scale (1/5 the price of lithium metal anodes material) Applications: Transforming Energy Storage Across Industries 1. Grid-Scale Storage Enables 4+ hour systems with LCOS of $0.08/kWh Secured 200 MWh pilot order from SPIC 2. Electric Mobility Eliminates winter range anxiety in A00 EVs (76% range retention at -20°C) Automotive-grade packs (with BYD) to launch in 2025 3. Consumer Electronics 0.3 mm flexible sheets unlock wearable device potential

As the International Workers' Day approaches, our company hereby extends its festival greetings to you. Meanwhile, in order to facilitate your advance business arrangements, the relevant matters regarding the May Day holiday of our company are hereby notified as follows: Our company will have a holiday from Thursday, May 1st, 2025 to Monday, May 5th, 2025, totaling 5 days. Normal work will resume on Tuesday, May 6th. If you have any urgent matters to contact us during this period, we will do our best to respond to your needs in a timely manner. However, the reply may be slightly delayed due to limited resources during the holiday. We hope for your understanding. For the orders under negotiation, we suggest that you communicate with us in advance about the order details and requirements so that we can promptly arrange production and delivery for you after the holiday, ensuring the smooth progress of the project. For customers who have placed orders, we will make corresponding preparations before the holiday and resume processing as soon as possible after the holiday to minimize the impact of the holiday on the order delivery time. All along, we have been extremely grateful for your support and trust in our company's lithium battery materials and equipment business. We are well aware that your satisfaction is the driving force for our progress. Thank you again for your understanding and support. I wish you all the best and a pleasant mood during the May Day holiday!

In the internal structure of lithium batteries, there is a seemingly insignificant key component that plays a decisive role in battery performance and safety - the lithium battery separator. From the appearance, it is just a thin film, with a thickness usually ranging from a few micrometers to tens of micrometers, resembling a fraction of a human hair. However, its interior is full of hidden wonders, filled with a dense array of micro-pores with diameters at the nanometer level, which form a unique microstructure. The main functions of lithium battery separators are twinning: Firstly, they act as a "physical barrier" between the positive and negative electrodes. By virtue of their non-conductive nature, they effectively prevent direct contact between the positive and negative electrodes, avoiding short circuits and laying a solid foundation for the safe operation of the battery. Secondly, it is a dedicated "high-speed channel" for lithium ions, allowing lithium ions in the electrolyte to freely shuttle between the positive and negative electrodes, ensuring the smooth progress of the battery's charging and discharging process. In simple terms, the separator is like a strict "traffic controller", allowing only lithium ions to pass through while keeping other "interfering factors" out. From the perspective of material, given that the electrolyte of lithium batteries is mostly an organic solvent system, this requires that the separator material must have good resistance to organic solvents. At present, the mainstream separator materials for lithium batteries are high-strength film-like polyolefin porous membranes, among which polyethylene (PE) and polypropylene (PP) microporous separators are the most widely used. PE diaphragms have relatively excellent low-temperature resistance and are relatively soft in texture. PP diaphragms are more heat-resistant, have a lower density than PE, and also have a higher melting point and closed-cell temperature. In practical applications, to meet the strict requirements for battery performance in different scenarios, people often combine PE and PP to create double or triple-layer composite separators, such as the common three-layer PP/PE/PP separator, which integrates the advantages of both materials and greatly enhances the comprehensive performance of the separator. Although lithium battery separators are small, they contain numerous advanced technologies and complex processes. They are one of the core components that ensure the efficient and safe operation of lithium batteries and play an indispensable role in promoting the vigorous development of the new energy industry.