I believe you are wrong. If you look closely and accurately, you will see that the electrical, aeronautical and mechanical engineers and other technicians prefer Li-ion Batteries rather than Titanium oxide one.
Based on literature recently TiO2B one of the recently discovered polymorph of TiO2 shows almost double activity compare to commercial LiAlH4.My curiosity actually why it happened. What actual mechanism. I had very prestigious publication on mesoporous tio2b in Chen matter