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Improving the initial coulombic efficiency of lithium-ion batteries is a complex and important topic, which is directly related to the energy utilization and overall performance of the battery. The following is an in-depth analysis of the factors affecting the first coulombic efficiency of lithium-ion batteries from multiple perspectives, and proposes corresponding solutions. 1.Factors affecting t...
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As a key equipment in battery production, the calibration accuracy of the coating head of the lithium battery coating machine directly affects the coating quality, and thus affects the performance and life of the battery. This article will analyze the calibration method of the lithium battery coating machine die head in detail from three levels: basic calibration, positioning calibration, and fine...
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Recently, Professor Zhang Qiang's team from the Department of Chemical Engineering at Tsinghua University published the research results on the bulk/surface interface structure design of lithium-rich manganese-based cathode materials for all-solid-state metal lithium batteries. They proposed an in-situ bulk/surface interface structure regulation strategy, constructed a fast and stable Li+/e−pathwa...
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The stability and dispersibility of battery slurry have an important impact on the properties of electrodes and finished battery products. So how to characterize the stability and dispersibility of battery slurry? Characterization method of battery slurry stability 1. Solid content method The solid content test method is a low-cost and easy-to-test method. Its principle is to place the slurry in a...
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WANG Kunpeng ,1, LIU Zhaolin2, LIN Cunsheng2, WANG Zhiyu ,1,2 1. State Key Lab of Fine Chemicals, School of Chemical Engineering, Dalian University of Technology, Dalian 116024, China 2. Branch of New Material Development, Valiant Co., Ltd., Yantai 265503, China Abstract In comparison to Li-ion batteries, Na-ion batteries offer the benefits of low cost, good low-temperature performance, and safety...
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The current production efficiency and yield of large cylindrical batteries are still relatively low, and there are still the following process difficulties in achieving high-efficiency mass production: 1) Full-tab forming: The difficulty lies in controlling the flattening accuracy and strength to avoid damage to the current collector or the generation of debris, dust, etc. 2) Collector plate and p...
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Lithium iron phosphate (LiFePO4) cathode electrode material oil-based slurry usually uses N-methylpyrrolidone (NMP), dimethyl sulfoxide and dimethylformamide as solvents, which have problems such as difficult solvent recovery, large amount of use and environmental pollution. LiFePO4 positive electrode material water-based slurry uses deionized water as solvent, which is environmentally friendly an...
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When designing lithium-ion batteries, the choice of battery casing material is critical. It must not only protect the battery's internal electrochemical components and structure but also possess properties like heat resistance, corrosion resistance, vibration resistance, and crush resistance. Among numerous materials, aluminum shells have emerged as the preferred choice due to their unique advanta...
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Solid-state batteries and liquid batteries have many similarities in manufacturing processes. For example, the manufacturing process of electrode sheet is based on slurry mixing, coating and calendering. After slitting, the tabs are welded and PACK (battery packs are processed into groups). However, there are also some differences. There are three core differences: 1) Composite cathode materials f...
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Before designing a battery production line, we need to comprehensively consider multiple aspects including product, capacity, process, equipment, regulations, supply chain, cost, safety, environmental protection, quality control, plant layout, automation, data management, maintenance, human resources, project management and market, etc. We ensure that all factors that may affect the production lin...
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