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　　Lithium ion secondary batteries. The lithium-ion secondary battery typically includes an electrode assembly, a container containing the electrode assembly, and an electrolyte. The electrode assembly includes two electrodes with opposite polarity and a separator. The separator includes a porous membrane containing ceramic particle clusters. The porous film is formed by bonding particle clusters with an adhesive. Each particle cluster is formed by sintering or by dissolving and recrystallizing all or part of the ceramic particles. The ceramic particle contains a ceramic material with a band gap. Each particle cluster can have the shape of grape clusters or thin layers, and can be formed by laminating ceramic particles in the shape of scales or thin layers.

　　Chemical battery is a device that directly converts Chemical energy into low-voltage DC energy. It has a history of more than 200 years since the Italian Volt invented the battery in 1800. But before World War II, the batteries were mainly zinc manganese Dry cell and Lead–acid battery [1]. After World War II, due to the rapid development of space technology, mobile communications, missiles, aerospace and other fields, as well as modern people's concern for the Energy crisis and environmental protection, the research and development of high energy storage batteries has attracted extensive attention. Due to the fact that lithium has the lowest mass and electrode potential among all metal elements, batteries composed of lithium have characteristics such as high open circuit voltage and large mass specific capacity. In the 1970s, people made disposable lithium batteries out of lithium, and in 1990, SONY Company first launched lithium-ion secondary batteries (usually referred to as lithium-ion batteries) in the market. With the rapid development of mobile communication and the popularity of notebook computers in recent years, lithium-ion batteries have rapidly replaced nickel cadmium and Nickel–metal hydride battery as the most popular high-energy batteries. At present, the mass specific capacity of commercial lithium-ion batteries is approximately 80-130mAh ・ g-1, with a cycle life of over 500-1000 cycles. It is expected to reach over 160mAh ・ g-1 by 2005. Lithium ion batteries also have good application prospects in electric vehicles. Solid polymer lithium-ion batteries and plastic lithium-ion batteries with ultra-thin, ultra-light, and high energy density have also been developed and are beginning to enter the market

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