This technology improves the electrical conductivity and rate capability of lithium titanate (LTO) powder by forming a metal or conductive inorganic coating layer on the particle surface using atomic layer deposition (ALD).
Lithium titanate suffers from low electronic conductivity, which leads to high reaction resistance and poor rate capability during rapid charging and discharging. Conventional carbon coating methods have limitations, as the carbon tends to oxidize during high-temperature heat treatment, reducing its effectiveness in enhancing conductivity.
This technology involves alloying lithium titanate particles with metals such as Cu or Al, or doping them with heterogeneous elements, and then forming single or dual coating layers of metal or non-metal conductive inorganic materials on the particle surface via atomic layer deposition to establish an electrical conduction network. Suitable for applications requiring high current flow in short durations, such as regenerative braking batteries for hybrid vehicles or industrial uninterruptible power supplies (UPS), this method avoids the oxidation issues associated with carbon coating heat treatment and allows for the precise design of conductive pathways at the particle level.
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