Unique Li4Ti5O12/TiO2 multilayer arrays with advanced surface lithium storage capability

Ge, Hao; Cui, Luxia; Sun, Zhijia; Wang, Denghu; Nie, Shengnan; Zhu, S. H.; Matthews, Bryan; Wu, Gang; Song, Xi‐Ming; Ma, Tianyi

doi:10.1039/c8ta03075h

Cited by 38 publications

(9 citation statements)

References 53 publications

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“…[ 1–3 ] Commercial graphite with low specific capacity (372 mAh g –1 ) and low lithiation potential (0.1 V vs Li + /Li) is difficult to meet the requirements of fast‐charging anodes. Although Li 4 Ti 5 O 12 is considered as a promising alternative to graphite anode, the energy density of Li 4 Ti 5 O 12 is severely limited by its low theoretical specific capacity (175 mAh g –1 ) and high lithiation potential (1.5 V vs Li + /Li) [ 4–7 ] . Low lithiation potential (0.2 V vs Li + /Li) of silicon anode with the highest specific capacity (3579 mAh g –1 ) could inevitably result in serious lithium dendrites in fast charging process.…”

Section: Introductionmentioning

confidence: 99%

Bi Works as a Li Reservoir for Promoting the Fast‐Charging Performance of Phosphorus Anode for Li‐Ion Batteries

Zhang

et al. 2022

Advanced Energy Materials

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considered as a promising alternative to graphite anode, the energy density of Li 4 Ti 5 O 12 is severely limited by its low theoretical specific capacity (175 mAh g -1 ) and high lithiation potential (1.5 V vs Li + / Li) [4][5][6][7] . Low lithiation potential (0.2 V vs Li + /Li) of silicon anode with the highest specific capacity (3579 mAh g -1 ) could inevitably result in serious lithium dendrites in fast charging process. [8][9][10][11] Phosphorus with a high theoretical specific capacity (2596 mAh g -1 ) and suitable lithiation potential (0.7 V vs Li + /Li) is an ideal anode material with high-energy density and fast-charging capability [1][2][3] (Figure 1a). However, the high-rate capability of P anode is hindered by its low electronic (≈10 −12 S m -1 ) and sluggish lithiation reaction kinetics that are two important influencing factors for fast-charging electrode. In addition, the unstable solidelectrolyte interphase (SEI) is due to the side reactions at the interface of electrode and electrolyte as well as the large volume expansion (≈300%) of P upon lithiation, what is worse, the dissolution behavior of intermediates (lithium polyphosphides, Li x Ps) results in low Coulombic efficiency and continual capacity fading, impairing the long-cycling stability. [12,13] To solve these problems, various carbon carriers and conductive polymer coating layers are usually introduced into P anode. [1][2][3][14][15][16][17][18] However, high Li diffusion barriers in carbon-based frameworks (0.34 eV) [19] and the heterogeneous interface, respectively, hinder the superior fastcharging performance of P-based composites. In addition, the problem of uneven local reaction in P particles has not been solved yet.Herein, to enhance the fast-charging performance, we introduced electrochemically active bismuth, a 2D layered material with a layer spacing of 0.396 nm, [20,21] into P/graphite (P/C) composite as a functional filler by the ball-milling method. Bi works as an anode with a similar electrochemical-reaction potential range as P anode, but the starting lithiation/delithiation potential is a little bit higher/lower than the latter, respectively. Besides, Bi anode offers excellent Li-ion diffusion and electron transport capability, combined with the strong interaction at interface of Bi and P, which can promote both Li ion and electron transport at the interface between Bi and P anode. Thus, Bi can work as a small Li reservoir for trapping Li in lithiation process and emitting Li in delithiation process prior to P Phosphorus anodes are a promising for fast-charging high-energy lithium-ion batteries because of their high specific capacity (2596 mAh g -1 ) and suitable lithiation potential (0.7 V vs Li + /Li). To solve the large volumetric change and inherent poor electrical conductivity, various carbon-based materials have been studied for loading P. However, the local aggregation of Li ions and electrons in P particles especially in the fast-charging process induces an uneven lithiation reaction and the great transient stress...

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Section: Introductionmentioning

confidence: 99%

Bi Works as a Li Reservoir for Promoting the Fast‐Charging Performance of Phosphorus Anode for Li‐Ion Batteries

Zhang

et al. 2022

Advanced Energy Materials

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“…Within this context, considerable efforts have been dedicated in developing earth-abundant transition-metal-based and metal-free catalysts, among which carbon-based nanomaterials, containing carbon nanotubes, porous carbons and graphene, have been emerging as promising electrocatalysts owing to the distinct advantages of low cost, long-term stability, tunable surface properties, and sufficient electron conductivity [9][10][11][12][13][14]. Furthermore, doping heteroatom (e.g., N, P, B, S) into carbon frameworks can significantly improve the catalytic activity of carbon materials, as the dopant atoms can break the electroneutrality of nearby carbons and thus create the active sites, favoring the adsorption of O2 molecules and the subsequent oxygen reduction process [15][16][17][18][19][20].…”

Section: Introductionmentioning

confidence: 99%

P-doped mesoporous carbons for high-efficiency electrocatalytic oxygen reduction

Zhao¹,

Hu²,

Zhu³

et al. 2019

Chinese Journal of Catalysis

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“…Dey et al reported that coral-like NiO nanostructures were prepared by a facile hydrothermal technique, the response of the NiO sensor was found to be 292% in the presence of 190 ppm formaldehyde at 300 °C . In addition, the three-dimensional (3D) hierarchical structure has a higher specific surface area and faster gas diffusion rate than the conventional one-dimensional or two-dimensional (2D) structure. − Ma et al synthesized a photocatalyst of hierarchically mesoporous titanium phosphonate by a hydrothermal method and it exhibited a significantly improved photocatalytic hydrogen evolution rate . Cao et al reported that the gas-sensing properties of the flower-like NiO structures are superior to the needle-like NiO structures on the basis of the research .…”

Section: Introductionmentioning

confidence: 99%

Graphitic Carbon Nitride Nanosheets Decorated Flower-like NiO Composites for High-Performance Triethylamine Detection

Wang

Tian

et al. 2019

ACS Omega

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The graphitic carbon nitride (g-C 3 N 4 ) nanosheets decorated three-dimensional hierarchical flower-like nickel oxide (NiO) composites (NiO/g-C 3 N 4 , Ni/CN) were synthesized via a facile hydrothermal method combined with a subsequent annealing process. The structure and morphology of the as-prepared Ni/CN composites were characterized by X-ray diffraction, field-emission scanning electron microscopy, transmission electron microscopy, X-ray photoelectron spectroscopy, and nitrogen absorption. The gas-sensing experiments reveal that the composites with 10 wt % two-dimensional g-C 3 N 4 (Ni/CN-10) not only exhibits the highest response of 20.03 that is almost 3 times higher than pristine NiO to 500 ppm triethylamine (TEA) at the optimal operating temperature of 280 °C but also shows a good selectivity toward TEA. The gas-sensitivity promotion mechanism is attributed to the internal charge transfer within the p–n heterojunction. Furthermore, the high specific surface area of the Ni/CN composites promotes adequate contact and reaction between the composites and triethylamine molecules. Therefore, the Ni/CN sensor has a great potential application in detecting TEA.

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Unique Li₄Ti₅O₁₂/TiO₂ multilayer arrays with advanced surface lithium storage capability

Abstract: Unique Li4Ti5O12/TiO2 multilayer arrays from a substrate-free method demonstrate advanced surface lithium storage capability.

Cited by 38 publications

References 53 publications

Bi Works as a Li Reservoir for Promoting the Fast‐Charging Performance of Phosphorus Anode for Li‐Ion Batteries

Bi Works as a Li Reservoir for Promoting the Fast‐Charging Performance of Phosphorus Anode for Li‐Ion Batteries

P-doped mesoporous carbons for high-efficiency electrocatalytic oxygen reduction

Graphitic Carbon Nitride Nanosheets Decorated Flower-like NiO Composites for High-Performance Triethylamine Detection

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