Lithium ion battery manufacturers interpret the classification of solid-state lithium-ion batteries
With the rise of all solid state lithium-ion batteries, various concepts of "all solid state" or "solid state" lithium-ion batteries have emerged one after another, and there is a confusion of concepts.
Semi solid lithium-ion battery: In the electrolyte phase of the battery cell, half of the mass or volume is solid electrolyte, and the other half is liquid electrolyte; Alternatively, one end of the electrode in the battery cell is entirely solid, while the other end contains liquid.
Quasi solid state lithium-ion battery: The electrolyte of the battery cell contains a certain amount of solid electrolyte and liquid electrolyte, and the mass or volume of the liquid electrolyte is smaller than the proportion of the solid electrolyte.
Solid state lithium-ion battery: A lithium-ion battery that contains a high mass or volume ratio of solid electrolyte in the battery cell, as well as a small amount of liquid electrolyte. It is referred to as a "solid-state lithium-ion battery" by some researchers, but this is not actually an all solid state lithium-ion battery.
Mixed solid-liquid lithium-ion battery: Both solid electrolyte and liquid electrolyte are present in the battery cell. The aforementioned semi-solid, quasi solid, and solid-state lithium-ion batteries are all types of mixed solid-liquid lithium-ion batteries. Since it is not recommended to classify based on the solid-liquid ratio artificially and there will be no ambiguity, it is recommended to use this term, which can also be referred to as "mixed solid-liquid electrolyte lithium-ion battery".
All solid state lithium-ion battery: The battery cell is composed of solid electrodes and solid electrolyte materials. Within the working temperature range, the battery cell does not contain any mass or volume fraction of liquid electrolyte, and can also be called an "all solid state electrolyte lithium-ion battery". Those that can undergo charge discharge cycles can be further referred to as "all solid state lithium secondary batteries" or "all solid state electrolyte lithium secondary batteries".
Lithium ion battery manufacturers interpret the development of solid-state lithium-ion battery technology
Solid state lithium-ion battery technology serves as a bridge between future battery technologies such as lithium metal batteries, lithium sulfur batteries, lithium air batteries, and existing liquid lithium-ion battery technologies. By replacing current liquid electrolytes with solid electrolytes and introducing lithium containing materials or metallic lithium into the negative electrode, it can provide a feasible solution to the contradiction between high safety and high energy density.
All solid state lithium-ion batteries using metallic lithium as the negative electrode are believed to have an energy density of over 400Wh/kg.
Therefore, the industrialization of solid-state lithium-ion batteries depends entirely on breakthroughs in specific material technologies and battery technology solutions. Once the process of matching key materials, electrodes, positive and negative electrodes with electrolytes breaks through, industrialization can be achieved relatively quickly.
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