Single-Crystalline Nb-Doped Rutile TiO2 Nanoparticles as Anode Materials for Na-Ion Batteries

Usui, Hiroyuki; Domi, Yasuhiro; Ohnishi, Shinya; Sakaguchi, Hiroki

doi:10.1021/acsanm.9b01521

Cited by 35 publications

(64 citation statements)

References 24 publications

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“…Cu 2+ and Al 3+ were selected as impurity ions because oxygen vacancies enhancing the anode properties of TiO2 electrodes were expected to form due to charge compensation. 26,27 2 Experimental…”

Section: Accepted M Manuscriptmentioning

confidence: 99%

“…Impurity-doped TiO2 was synthesized by a hydrothermal method. 28,29 A titanium isopropoxide solution was prepared by mixing 5 mL of Ti[OCH(CH3)2]4 (titanium tetraisopropoxide, 95 %, FUJIFILM Wako Pure Chemical), 5 mL of CH3CH(OH)CH3 (isopropanol, 99.5 %, Sigma-Aldrich), and 50 mL of an aqueous solution of glycolic acid (HOCH2CO2H, 99.0 %, Sigma-Aldrich). The concentration of titanium tetraisopropoxide was 1.6 mol L −1 .…”

Section: Active Materials Synthesismentioning

confidence: 99%

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Effects of Phase Change and Cu Doping on the Li Storage Properties of Rutile TiO2

et al. 2022

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The crystal structure and Li storage properties of Cu-doped rutile TiO2 after a phase change caused by lithiation were investigated for the first time. Structural analysis results confirmed that undoped rutile TiO2 was transformed to a disordered layered rock-salt LixTiO2 structure with a small volume expansion of only 1 % when cycled in a potential range of 1.0−3.0 V vs. Li + /Li. A substitutional solid solution of Cu 2+ was formed in layered LixTiO2. The Cu doping increased both the interlayer distance and electronic conductivity of the layered LixTiO2. As an Li-ion battery anode, a Cu-doped TiO2 electrode exhibited a long cycle life, maintaining a reversible capacity of 120 mAh g −1 over 10000 cycles at 5C and an excellent rate capability of 108 mAh g −1 at 50C. Furthermore, this electrode could also be potentially used as a Na storage material. These attractive properties demonstrate high applicability of Cu-doped rutile TiO2 as a novel anode material.

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Section: Accepted M Manuscriptmentioning

confidence: 99%

Section: Active Materials Synthesismentioning

confidence: 99%

Effects of Phase Change and Cu Doping on the Li Storage Properties of Rutile TiO2

et al. 2022

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“…Therefore, the exploration of suitable sodium host electrodes with superior rate capability and long cycling stability are increasing demanded. [ 7–9 ] Titanium dioxides (TiO 2 ) with different polymorphs, such as, anatase, [ 10–12 ] rutile, [ 13,14 ] and brookite [ 15,16 ] have been intensively investigated as excellent SIB anodes with their merits of remarkable structural stability, high abundance, and nontoxicity. Among them, anatase TiO 2 has attracted considerable attentions due to its high chemical stability in the form of nanoparticles and high electrochemical activity in SIBs in terms of high theoretical capacity (335 mAh g −1 ) and long cycle lifetime.…”

Section: Introductionmentioning

confidence: 99%

Synergistic Effect of Nitrogen and Sulfur Dual‐Doping Endows TiO₂ with Exceptional Sodium Storage Performance

Fan

Lin

Zhang

et al. 2020

Advanced Energy Materials

113

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Improving the diffusion kinetics of sodium ions within TiO2 and its intrinsic electronic conductivity is indispensable to enhance the rate capability and long cyclic stability of TiO2 anodes for sodium‐ion batteries. Although single‐heteroatom doping into TiO2 has been widely investigated, a comprehensive understanding of the effects of dual‐heteroatoms doping on the sodium storage performance of TiO2 is still lacking. Herein, nitrogen and sulfur dual‐doping is proposed to achieve a high doping concentration for anatase TiO2 hollow spheres. Experimental data and theoretical calculations reveal that N doping can efficiently narrow the bandgap of TiO2, while S doping is effective in facilitating Na+ diffusion within TiO2. Thus N and S codoped TiO2 shows remarkably boosted electronic conductivity, as well as accelerated sodium ion transfer kinetics owing to the synergistic effect of different doping heteroatoms, which leads to exceptional rate performance (307.5 and 156.4 mAh g−1 at 33.5 and 5025 mA g−1, respectively), and extraordinary cycling stability (90.5% retention over 2400 cycles at 3350 mA g−1). The greatly improved electrochemical performance emphasizes the importance of defects engineering in the rational design of advanced battery materials.

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“…[61] Additionally, the out-of-plane vibration of Ti-C at 212 cm −1 is significantly reduced, implying the Ti-C bond is gradually transformed into Ti-O bonds. [62] Moreover, the vibration peak intensity of rutile TiO 2 in TNC-600 is the highest, indicating the content of TiO 2 in the nanohybrid will gradually increase with the calcination temperature. Notably, the peaks located at 1352 and 1585 cm −1 are ascribed to the broadened D and G peaks of C element, where the D band represents the lattice defects of carbon and G band is caused by in-plane stretching vibration of sp 2 carbon.…”

Section: Resultsmentioning

confidence: 97%

Architecting Nb‐TiO₂₋_x/(Ti_0.9Nb_0.1)₃C₂T_x MXene Nanohybrid Anode for High‐Performance Lithium‐Ion Batteries

Dai

Cao

Feng

et al. 2021

Adv Materials Inter

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MXene‐based materials with excellent conductivity and stability features have attracted worldwide attention as anode of lithium‐ion batteries (LIBs), while the serious stacking issue and low capacity still hinder its further development in the field of energy storage. In this work, a nanohybrid architecture (Nb‐TiO2−x/MXene) is prepared with Nb‐TiO2−x particles conformally coated on the (Ti0.9Nb0.1)3C2Tx MXene via a facile annealing method, which delivers a high specific capacity of 279.2 mAh g−1 at the current density of 0.1 A g−1 and a superior capacity retention of 91.5% after 2000 cycle at 1 A g−1 as the anode material of LIBs. Importantly, the (Ti0.9Nb0.1)3C2Tx MXene layers provide sufficient active sites and open pathways as well as structural support for the reversible Li+ insertion/extraction, and the Nb‐TiO2−x particles enable reversible and fast Li+ diffusion and storage, thus leading to high‐performance and durable anode materials. This work offers a guidance for the elaborate design of MXene‐based nanostructured electrodes toward advanced energy storage devices.

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Single-Crystalline Nb-Doped Rutile TiO₂ Nanoparticles as Anode Materials for Na-Ion Batteries

Cited by 35 publications

References 24 publications

Effects of Phase Change and Cu Doping on the Li Storage Properties of Rutile TiO<sub>2</sub>

Effects of Phase Change and Cu Doping on the Li Storage Properties of Rutile TiO<sub>2</sub>

Synergistic Effect of Nitrogen and Sulfur Dual‐Doping Endows TiO₂ with Exceptional Sodium Storage Performance

Architecting Nb‐TiO₂₋_x/(Ti_0.9Nb_0.1)₃C₂T_x MXene Nanohybrid Anode for High‐Performance Lithium‐Ion Batteries

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Single-Crystalline Nb-Doped Rutile TiO2 Nanoparticles as Anode Materials for Na-Ion Batteries

Cited by 35 publications

References 24 publications

Effects of Phase Change and Cu Doping on the Li Storage Properties of Rutile TiO<sub>2</sub>

Effects of Phase Change and Cu Doping on the Li Storage Properties of Rutile TiO<sub>2</sub>

Synergistic Effect of Nitrogen and Sulfur Dual‐Doping Endows TiO2 with Exceptional Sodium Storage Performance

Architecting Nb‐TiO2−x/(Ti0.9Nb0.1)3C2Tx MXene Nanohybrid Anode for High‐Performance Lithium‐Ion Batteries

Contact Info

Product

Resources

About

Single-Crystalline Nb-Doped Rutile TiO₂ Nanoparticles as Anode Materials for Na-Ion Batteries

Synergistic Effect of Nitrogen and Sulfur Dual‐Doping Endows TiO₂ with Exceptional Sodium Storage Performance

Architecting Nb‐TiO₂₋_x/(Ti_0.9Nb_0.1)₃C₂T_x MXene Nanohybrid Anode for High‐Performance Lithium‐Ion Batteries