India Starts Mass production for Semi-Solid lithium battery following Thailand
Lucas TVS said yesterday that it wants to open the gigafactory in Thervoy Kandigai, Gummudipundi, by the second half of 2023 and build up production capacity to 10GWh in two stages, with the expectation that other plants will be constructed around the country at later dates.
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What is Semi-Solid Battery?
Semi-solid battery, a type of flow battery using solid battery active materials or involving solid species in the energy carrying fluid, has the great potential of doubled mileage of an electric car on the cost of one-third of current electric vehicle, developed by a research team in MIT who proposed this concept using lithium-ion battery materials. In such a system, both positive (cathode) and negative electrode (anode) consist of active material particles with carbon black suspended in liquid electrolyte. Active material suspensions are stored in two energy storage tanks. The suspensions are pumped into the electrochemical reaction cell when charging and discharging.
What are the Strenghths of Semi-Solid Battery?
Compared with existing lithium-ion batteries, semi-solid lithium batteries are smaller, more stable and safer, can achieve higher energy density, and are much cheaper than lithium-ion batteries. This design takes advantage of both the designing flexibility of flow batteries and the high energy density active materials of lithium-ion batteries.
It has 4 advantages as following.
Light and high energy density. It is not necessary to use lithium-intercalated graphite negative electrodes, but directly use metallic lithium as the negative electrode, which can significantly reduce the amount of negative electrode materials.
Thin and small. If a separator and electrolyte are replaced with semi-solid electrolytes (mainly organic and inorganic ceramic materials), the distance between the positive and negative electrodes (traditionally filled with diaphragm electrolyte can be shortened to even only a few to ten microns, which greatly reduce the thickness of the battery.
Flexibility. The semi-solid lithium power battery uses brittle ceramic materials, which can be bent after the thickness is thinner than millimeters, and the material will become flexible.
More safety. Eliminates the possible dangers of traditional lithium batteries.
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