The flexibility of all-solid-state batteries is expected

Some time ago, foreign media released a news that the electric vehicle Fisker applied for a patent for a solid-state lithium battery, with a maximum battery life of 800 kilometers and a charge of only 1 minute. This is undoubtedly a huge breakthrough in the new energy industry, which is of great significance to the promotion and popularization of electric vehicles. What is an all-solid-state battery? In layman's terms, an all-solid-state battery is a battery in which there is no gas, no liquid, and all materials exist in solid form. What are the advantages of solid-state batteries?

High energy density

After using all-solid-state electrolytes, the applicable material system of lithium-ion batteries will also change. The core point is that it is not necessary to use lithium-intercalated graphite negative electrodes, but directly use metal lithium as negative electrodes, which can significantly reduce the cost of negative electrode materials. The energy density of the whole battery is significantly improved. Compared with ordinary lithium-ion batteries, the energy density of all-solid-state batteries can be greatly improved: now many laboratories have been able to trial-produce all-solid-state batteries with an energy density of 300-400Wh/kg in small batches.Also read:https://www.aimeno.com/lithium-battery-pack/194.html

Small size

With the improvement of energy density, the volume of the battery will become smaller and smaller. In traditional lithium-ion batteries, separators and electrolytes are required, which together account for nearly 40% of the volume and 25% of the mass of the battery. And if they are replaced by solid electrolytes (mainly there are two systems of organic and inorganic ceramic materials), the distance between the positive and negative electrodes (traditionally filled by diaphragm electrolyte, now filled by solid electrolyte) can be shortened to even only a few to More than a dozen microns, so that the thickness of the battery can be greatly reduced-so all-solid-state battery technology is the only way for the miniaturization and thinning of batteries.

Security

The operating temperature range of solid-state lithium batteries is wider. Even if a short circuit occurs locally, only the polymer melts and becomes an insulator after melting. If thermal runaway occurs and the temperature of the battery is raised, the melting temperature of lithium metal is 180 degrees. Even if it reaches 180 degrees, after the lithium is melted, leave a space for the battery cell, and the lithium metal can go to the reserved place. Even the most severe puncture test did not exceed the thermal runaway temperature of lithium batteries.

The prospect of flexibility

The all-solid-state battery can be further optimized to become a flexible battery. By using appropriate packaging materials, the fabricated battery can withstand hundreds to thousands of times of bending without attenuating its performance. In fact, flexible electronic devices represented by various wearable devices are an important direction for the development of next-generation electronic products, and this requires that the components in the products also need to be flexible. Not only that, the potential of functionalized all-solid-state batteries is far beyond the above-mentioned flexible batteries. After optimizing the structure of battery materials, it can be made into transparent batteries, or stretchable batteries with a stretching range of up to 300%.Also read:24V 200Ah Lithium Battery Leading companies in the battery industry, such as Toyota, Panasonic, Samsung, Mitsubishi, and the domestic Ningde era, have actively deployed solid-state battery reserve research and development. Relatively speaking, Bolloré in France, Sakti3 in the United States, and Toyota in Japan have relatively high technological maturity and deep technological accumulation. These three companies also represent the typical technical development directions of the three major solid-state electrolytes of polymers, oxides and sulfides.