A novel soft-chemical synthetic route using Na2Ti6O13 as a starting compound and electrochemical properties of H2Ti12O25

Electrochemical Property of Particle-size Controlled H₂Ti₁₂O₂₅ as a Negative Electrode Material for Lithium-ion Battery

“…These results were well consistent with the previous reports. 1,7 On the other hand, the discharge capacities of the HTO(BM-873K), HTO(BM-973K) and HTO(BM-1073K) samples were 255, 246, and 234 mAh g ¹1 , respectively, which were much larger than that of nontreated H 2 Ti 12 O 25 sample. Moreover, the initial charge capacities of the HTO(BM-873K), HTO(BM-973K) and HTO(BM-1073K) samples at a constant current density of 220 mA g ¹1 at 298 K were 205, 201, and 194 mAh g ¹1 , respectively.…”

“…7 This fact suggests that the electrochemical performance of H 2 Ti 12 O 25 depends on the morphology of starting compound, such as particle size and shape. In the present study, we synthesized particle-size controlled H 2 Ti 12 O 25 samples by ball-milling and subsequent annealing of starting Na 2 Ti 3 O 7 materials, and revealed the obtained particle properties and electrochemical properties.…”

Soft chemical synthesis and crystal structure of novel hydrogen titanium oxide H₂Ti₁₂O₂₅

“…However, we have focused only on the estimate of the average structure of the material in this time. In the results, the crystal structure information of H 2 Ti 12 O 25 is estimated the monoclinic system with an appropriate space group of Cm, C2 or C2/m, lattice parameters a = 12 ¡, b = 3.7 ¡, c = 20 ¡ and ¢ = 95°f rom SAED pattern of (a) and (b Journal of the Ceramic Society of Japan 124 [6] from SAED pattern data. Therefore, the index of these shape peaks in XRD pattern of H 2 Ti 12 O 25 were assumed 110 for 24.7362°and 020 for 48.5243°.…”

Insights into the Li Diffusion Dynamics and Nanostructuring of H2Ti12O25 To Enhance Its Li Storage Performance

“…Until now, spinel Li 4 13 The condensed layered structure of HTO with its atomic-scaled tunnel-like morphology is capable of providing a sufficient number of insertion sites for Li storage via a two-phase reaction. As a result, HTO exhibits a reversible capacity of more than 200 mAh g −1 with a flat voltage plateau at approximately 1.55 V (vs. Li/Li + ), 14,15 which indicates that HTO has noticeable advantages as an advanced high-voltage anode material for LIBs ( Figure S1). Despite its potential, HTO has a limited capacity at high current density and a continued fading of capacity over repeated charge−discharge cycles, which is supposedly related to the veiled Li dynamics in HTO.…”