Creating a battery that can store a lot of energy and be safe enough is the wish of all battery industry practitioners. It also means innovation, it means the emergence of new systems, and it also means the emergence of new materials.

　　The all-solid-state battery has become a star in the lithium battery industry in the past two years. It has subverted the traditional lithium battery production system and can almost build the perfect battery needed by human beings in the future. As a professional customized lithium battery manufacturer, SES Power believes that if If the supporting new materials cannot be solved, all-solid-state batteries can only exist in the laboratory stage. Because many batteries contain liquid electrolytes, which are potentially flammable. Therefore, solid-state lithium-ion batteries composed entirely of solid components are increasingly attractive to scientists because they offer an enticing combination of greater safety and higher energy density.

　　A research member from the University of Waterloo, Canada, as part of the Joint Center for Energy Storage Research (JCESR) at the U.S. Department of Energy's (DOE) Argonne National Laboratory-based Joint Energy Storage Research Center (JCESR), has discovered a new solid electrolyte that offers several important advantages. This electrolyte, composed of lithium, scandium, indium, and chlorine, conducts lithium ions well, but poorly conducts electrons.

　　This combination is critical to creating an all-solid-state battery that can be charged and discharged over a hundred times at high voltages (above 4 volts) and perform thousands of times at moderate voltages without ever having to. Significant capacity loss. The chloride nature of the electrolyte is key to its stability at operating conditions above 4 volts, which means it is suitable for the typical cathode materials that make up the mainstream of today's lithium-ion batteries.

　　(Chlorine-based electrolytes are providing better performance for solid-state lithium-ion batteries).

　　Linda Nazar, Distinguished Research Professor in the Department of Chemistry at the University of Waterloo and a longtime member of the JCESR, said: "The main attraction of solid-state electrolytes is that they do not catch fire and can be placed efficiently in battery cells, and we are excited to demonstrate stable high voltage operation".

　　Currently, the upgrade bottleneck of solid-state electrolytes is mainly concentrated on sulfides, which oxidize and degrade above 2.5 volts. As a result, they require insulating coatings around cathode materials that operate at voltages above 4 volts, but this impairs the ability of electrons and lithium ions to move from the electrolyte to the cathode. For sulfide electrolytes, the ongoing challenge has been to electronically isolate the electrolyte from the cathode so that it does not oxidize, but still require the electronic conductivity of the cathode material.

　　While Nazar's group was not the first to devise a chloride electrolyte, building on previous work, they decided to swap half of the indium for scandium, which was shown to reduce electrons and improve ionic conductivity a major advance. "Chloride electrolytes have become increasingly attractive because they only oxidize at high voltages and classifications are compatible with our best cathodes," Nazar said.

　　A chemical key to ionic conductivity lies in the material's criss-cross three-dimensional structure, known as the spinel structure. The researchers had to balance two competing desires: to load the spinel with as many charge-carrying ions as possible, but also to leave room for the ions to move.

　　"You can think of it as trying to throw a dance party -- you want people to come, but you don't want it to be too crowded," Nazar said. Ideally, half of the sites in the spinel structure are occupied by lithium, while the other half remained open, but she explained that the situation was difficult to engineer. In addition to lithium's good ionic conductivity, Nazar and her colleagues needed to ensure that electrons could not easily move through the electrolyte, avoiding triggering and disintegrating at high voltages.

　　"Imagine a game of hopscotch," she said. "Even if you just want to jump from square one to square two, if you can create a wall that makes it difficult for electrons (in our case) to jump over, that's another advantage of this solid electrolyte."

　　All-solid-state lithium batteries are undoubtedly a correct development direction for the lithium battery industry. While paying attention to the development of new material systems such as sodium-ion lithium batteries, SES Power also pays great attention to the development of all-solid-state battery technology, because this technology is more based on manufacturing Process update. The technology of all-solid-state batteries can actually be replicated in the production system of most lithium batteries, which is a revolutionary thing. For example, our 12V100Ah, 24V100Ah, 36V100Ah, 48V100Ah square aluminum-shell lithium iron phosphate batteries using EVE, CATL, and BYD, assuming all-solid-state technology is used, they can provide an additional 30%~50% without changing the volume. energy, and the safety performance is more reliable. Our low-temperature application batteries, lithium batteries that can discharge at a normal rate at -40 degrees Celsius, will also have a relatively large reduction in capacity and cost.

　　The market is very honest. Lithium batteries with high capacity, low price and high safety will definitely be welcomed by the market. This is the fundamental reason why SES Power pays attention to all-solid-state lithium-ion battery technology, and hopes that all-solid-state lithium-ion battery technology will mature as soon as possible.