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1.Research background and concept of wide temperature range battery   Since the 1970s. Lithium-ion batteries have attracted wide attention after researchers found the lithium storage performance of layered oxides and sulfides. Multi-application scenarios not only reflect the advantages of lithium batteries, but also the driving force of their development. As shown in Figure 1, lithium batteries only need to meet the operating temperature of 15~35 °C in applications such as electric vehicles and portable electronic devices. However, in some special application scenarios, lithium batteries are required to break through this temperature range. For example, the oil industry needs lithium batteries to adapt to a working environment of about 80 °C,

1.Research background and concept of prelithiation technology With the advancement of technology and the development of society, energy consumption and environmental pollution problems are becomingmore and more serious, which has led to the pursuit of efficient and environmentally friendly energy storage solutions. Lithium-ion battery  is one of the most mainstream energy storage devices, and its performance improvement has become a research hotspot. However, traditional methods of enhancing electrode material performance and developing new electrolyte systems have faced limitations. During battery cycling, the irreversible loss of lithium ions severely impacts the energy density and cycle life of the battery. Previous methods for improving battery performance have struggled to meet the current

1.The concept and research background of solid-state lithium battery Since the 1990s, lithium-ion batteries have developed into the most mature and widely used battery technology route. With the increasing requirements of the market for battery energy density, safety, and economy, ‘solid-state batteries‘ that use solid electrodes and solid electrolytes and have higher energy density and safety have emerged. Traditional lithium-ion batteries include four major components: positive electrode, negative electrode, electrolyte and separator. Solid-state batteries replace the electrolyte with solid electrolyte. The key difference between solid-state batteries and traditional lithium-ion batteries is that the electrolyte changes from liquid to solid, taking into account safety, high energy density and other properties. Solid

1. Overview of cathode materials of lithium-ion batteries   Lithium-ion batteries have been widely used in consumer electronics, electric vehicles, aerospace and other fields due to their high energy density, high coulomb efficiency, long service life, no memory effect, low self-discharge characteristics and chemical potential of different electrode designs. In recent years, lithium-ion batteries have gradually occupied the main market share of electric vehicles, energy storage systems and mobile electronic devices. Since the first commercialization of lithium-ion batteries by Sony in 1990, the anode materials have been carbon-based materials, while the cathode materials have made great progress and are the most critical materials to promote the performance of lithium-ion batteries. The particle size,

Overview of anode materials of lithium-ion batteries In 1989, SONY company found that petroleum coke carbon materials could be used to replace metal lithium to make secondary batteries, which really opened the prelude to the large-scale application of lithium-ion batteries. In the next 30 years, three generations of products such as carbon, lithium titanate and silicon-based materials have been used as anode materials. This article will briefly introduce various lithium-ion battery anode materials according to the structural classification of anode materials. Characteristics of ideal anode materials The ideal anode material should have the following characteristics: 1.Low lithium insertion potential: To ensure a higher output voltage (the potential of the lithium