EV Batteries with Titanium Anodes

Fast ion conductor modified lithium titanate anode material for lithium-ion batteries with improved rate performance and cycle life compared to conventional lithium titanate. The modification involves coating a fast ion conductor like aluminum lithium acid on the surface of nano-sized lithium titanate particles. This in-situ coating reduces side reactions and gas production during charging/discharging, improving stability and cycle life. The bulk doping of aluminum in lithium titanate also enhances ionic and electronic conductivity for better rate performance.

Source

A core-shell structured titanium-based composite material for lithium-ion batteries that improves their performance compared to conventional titanium niobate anodes. The composite has a shell of nano-lithium titanate coated onto the inner core of titanium niobate. The composite has a specific surface area of 1-10 m2/g, median particle size of 4-5 um, and pH of 10-11. The composite composition is 50-65% titanium niobate, 35-50% lithium titanate. The method to make the composite involves sol-gel synthesis followed by solid-state reaction at 600-1000°C.

Source

TiO2 nanotube array/foamed titanium lithium metal anode material for lithium-ion batteries that reduces dendrite growth and improves cycle life compared to conventional lithium metal anodes. The material is prepared by electrochemically growing TiO2 nanotubes on porous titanium foam, then infusing molten lithium into the nanotube array/foam composite. This provides a 3D framework for lithium to fill, limiting volume expansion and dendrite formation during cycling.

Source

A composite material for lithium battery anodes that improves performance compared to traditional carbon-based anodes. The composite contains lithium titanium oxide (LTO) and bismuth titanium oxide (BTO) mixed together. This composite anode active material provides higher capacity, rate capability, and cycle life compared to pure LTO or BTO anodes. It allows for reversible lithium intercalation between the two oxides, improving overall performance. The composite can be made by mixing lithium, titanium, and bismuth precursors, followed by heat treatment.

Source

Titanium silicate-based lithium ion battery anode material with improved energy density, stable voltage platform, and long cycle life compared to graphite. The material is titanium lithium silicate (Li2TiSiO5) doped with other ions like lithium, yttrium, or aluminum. Coating the doped titanium silicate with conductive materials like carbon or metals improves electrochemical properties. The coating helps activate the insulating doped silicate during cycling. The coated doped titanium lithium silicate anode shows higher capacity, stable voltage, and better cycle performance compared to uncoated doped titanium silicate.

Source

Active material for battery, manufacturing method, battery, and pack that overcome issues of gas generation and deformation when using carbon as a conductive agent in lithium titanate batteries. The active material is a mixed phase of lithium titanate and nonstoichiometric titanium oxide. The mixed phase forms during sintering of the lithium and titanium precursors. The nonstoichiometric titanium oxide provides conductivity without generating gas like carbon does. The mixed phase active material allows high current batteries without the carbon's issues.

Source

Negative electrode active material for lithium-ion batteries with improved cycling life, rate performance, and energy density. The material is lithium titanium composite oxide particles with an average pore diameter of 50-500 nm. This pore size range improves electrolyte impregnation by preventing clogging of the pores during cycling. It also enables better lithium ion access to the core of the particles. The composite oxide structure can be spinel lithium titanate with impurity phases like rutile titanate or lithium titanate.

Source