Mesocrystalline effect in a NiTiO₃/TiO₂ nanocomposite for enhanced capacity of lithium-ion battery anodes

Abstract

H2O2-modified layered titanate H1.07Ti1.73O4 (H2O2-HTO) is an excellent precursor for topochemical synthesis but its exfoliation reaction is unclear. Herein, we reported the first study on the exfoliation reaction of H2O2-HTO...

Topochemical synthesis of Mn2O3/TiO2 and MnTiO3/TiO2 nanocomposites as lithium-ion battery anodes with fast Li+ migration and giant pseudocapacitance via the mesocrystalline effect

“…The mesocrystalline materials consist of oriented nanocrystals, in which the Li + migration is relatively fast. 28,29 As shown in Fig. 8(e), when Li + migrates from a Mn 2 O 3 or MnTiO 3 nanocrystal to the next Mn 2 O 3 or MnTiO 3 nanocrystal with the same orientation in the mesocrystalline material, the migration distance in the interface passage will be shorter compared with that of a Mn 2 O 3 or MnTiO 3 nanocrystal with random orientation in the polycrystalline material.…”

“…[24][25][26][27] Furthermore, we have synthesized mesocrystalline MTiO 3 /TiO 2 (M = Co, Ni) nanocomposites from M 2+ ionexchanged layered titanates and demonstrated that the mesocrystalline MTiO 3 /TiO 2 nanocomposites can provide a short distance for charge transport and efficient Li + immigrating passage for Li + insertion/extraction reactions, which results in an enhanced specific charge-discharge capacity. 28,29 However, to the best of our knowledge, the study on the Li + insertion/ extraction reaction of mesocrystalline Mn 2 O 3 in LIBs has not been reported.…”

Structure, Properties, Preparation, and Application of Layered Titanates

“…The design of hybrid electrode materials of transition metal titanate MTiO 3 and TiO 2 could also be thought as an effective way to improve the performance of lithium-ion storage . A unique topochemical process was developed to synthesize mesocrystalline CoTiO 3 /TiO 2 nanocomposites from H 1.07 Ti 1.73 O 4 precursor.…”

“…238 The design of hybrid electrode materials of transition metal titanate MTiO 3 and TiO 2 could also be thought as an effective way to improve the performance of lithium-ion storage. 239 A unique topochemical process was developed to synthesize mesocrystalline CoTiO 3 /TiO 2 nanocomposites from H 1.07 Ti 1.73 O 4 precursor. The anode capacity of the lithium-ion battery of the mesocrystalline CoTiO 3 /TiO 2 nanocomposite is about 400 mAh/g, which is 2 times higher than that of polycrystalline CoTiO 3 .…”

Completely suppressed high-voltage phase transition of P2/O3-Na0.7Li0.1Ni0.1Fe0.2Mn0.6O2viaLi/Ni co-doping for sodium storage

“…[1][2][3][4][5][6][7] In general, the energy density and cycling life of SIBs are highly dependent on cathode materials. [8][9][10][11] Among various cathode materials, P2-type Fe, Mn-based layered oxides for SIBs have been attractive owing to the huge abundance, eco-friendliness, and low price of Fe and Mn. [12][13][14][15] In particular, P2-Na 2/3 Fe 1/2 Mn 1/2 O 2 possesses a high capacity of 190 mA h g −1 within the potential range from 1.5 to 4.3 V, benefitting from those two redox couples of Fe 3+ /Fe 4+ and Mn 3+ /Mn 4+ .…”