Bulk Ti₂Nb₁₀O₂₉as long-life and high-power Li-ion battery anodes

Electrochemical performances and gassing behavior of high surface area titanium niobium oxides

“…TNO7-SS and TNO29-SS show primary particles in the μm range, similar to what has been previously observed for those two materials,23,26,35,[38][39][40] with some agglomerates in the 10 to 20 μm range. TNO7-ST-750 is composed of primary particles below 50 nm reaching ≈ 50 nm for TNO7-ST-BM-750.…”

“…3 albeit with electrodes containing 20 % of carbon black. 39 As observed in Figure 3 and Supplemental Figure S2, due to the high surface area of the prepared oxides, it takes about 10 cycles for the materials to reach their optimum capacity after complete soaking of the electrode by the electrolyte. In order to understand the differences in electrochemical behavior of our materials, the voltage profile of their 10 th cycle is compared in The electrochemical performances of TNO7 and TNO29 are clearly enhanced by decreasing the particle size from the µm to the nm range.…”

“…37 On the other hand, the electrochemical performances of Ti 2 Nb 10 O 29 have only been reported after solidstate reaction. [38][39][40] Amongst those reports, only few have evaluated the electrochemical performances of those two oxides in Li-ion configuration and always at a coin cell level. 24,28,31,32 Evaluation in a larger size pouch cell format is a pre-requisite prior to industrial consideration.…”

Porous TiNb2O7 Nanospheres as ultra Long-life and High-power Anodes for Lithium-ion Batteries

“…Their advantage is to avoid the formation of passivating solid-electrolyte interphase (SEI) layer [4]. Among these candidates [5][6][7][8][9][10][11][12][13][14][15], TiNb2O7 with a voltage platform at about 1.65 V has attracted considerable interests owing to the high theoretical capacity of 387.6 mA h/g [15][16][17][18][19][20][21][22][23][24][25][26]. However, the low ionic and electronic conductivity of TiNb2O7 materials have limited the electrochemical performance [15,16].…”

Study of the lithium diffusion properties and high rate performance of TiNb6O17 as an anode in lithium secondary battery

“…The capacities of TNO materials are influenced by many redox reactions, such as one Ti (Ti 3+ /Ti 4+ ) and two Nb reactions (Nb 3+ /Nb 4+ and Nb 4+ /Nb 5+ ) 5,6 . On the other hand, they have lower capacity and reversibility than their theoretical capacities due to the low electric conductivity and lithium diffusion properties into the structure called Wesley-Roth 2D structure 7–9 .…”