Effect of particle size on the conductive and electrochemical properties of Li2ZnTi3O8

Nikiforova, P. A.; Стенина, И. А.; Кулова, Т. Л.; Skundin, A. M.; Yaroslavtsev, A. B.

doi:10.1134/s002016851611011x

Cited by 13 publications

(6 citation statements)

References 17 publications

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“…At the same time, because of the Li x C 6 potential being close to that of Li/Li + , the electrolyte undergoes reduction that leads to blocking of solid electrolyte interphase (SEI) formation on the anode surface. The latter results in both irreversible capacity loss and, more unfavourably, tree-like lithium dendrite growth (especially intensive at high C -rates) that has a negative effect on LIB safety [ 3 , 4 ]. In this case, the safety of LIBs is sufficient for traditional applications, whereas it is an insurmountable obstacle for medium- and large-scale energy storage requiring faster charge/discharge.…”

Section: Introductionmentioning

confidence: 99%

Effect of Hf-doping on electrochemical performance of anatase TiO ₂ as an anode material for lithium storage

et al. 2018

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Hafnium-doped titania (Hf/Ti = 0.01; 0.03; 0.05) had been facilely synthesized via a template sol–gel method on carbon fibre. Physico-chemical properties of the as-synthesized materials were characterized by X-ray diffraction, Raman spectroscopy, scanning electron microscopy, energy-dispersive X-ray analysis, scanning transmission electron microscopy, X-ray photoelectron spectroscopy, thermogravimetry analysis and Brunauer–Emmett–Teller measurements. It was confirmed that Hf4+ substitute in the Ti4+ sites, forming Ti1–xHfxO2 (x = 0.01; 0.03; 0.05) solid solutions with an anatase crystal structure. The Ti1–xHfxO2 materials are hollow microtubes (length of 10–100 µm, outer diameter of 1–5 µm) composed of nanoparticles (average size of 15–20 nm) with a surface area of 80–90 m2 g–1 and pore volume of 0.294–0.372 cm3 g–1. The effect of Hf ion incorporation on the electrochemical behaviour of anatase TiO2 in the Li-ion battery anode was investigated by galvanostatic charge/discharge and electrochemical impedance spectroscopy. It was established that Ti0.95Hf0.05O2 shows significantly higher reversibility (154.2 mAh g–1) after 35-fold cycling at a C/10 rate in comparison with undoped titania (55.9 mAh g–1). The better performance offered by Hf4+ substitution of the Ti4+ into anatase TiO2 mainly results from a more open crystal structure, which has been achieved via the difference in ionic radius values of Ti4+ (0.604 Å) and Hf4+ (0.71 Å). The obtained results are in good accord with those for anatase TiO2 doped with Zr4+ (0.72 Å), published earlier. Furthermore, improved electrical conductivity of Hf-doped anatase TiO2 materials owing to charge redistribution in the lattice and enhanced interfacial lithium storage owing to increased surface area directly depending on the Hf/Ti atomic ratio have a beneficial effect on electrochemical properties.

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Section: Introductionmentioning

confidence: 99%

Effect of Hf-doping on electrochemical performance of anatase TiO ₂ as an anode material for lithium storage

et al. 2018

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“…15 Along with the ceramic method, the sol-gel method was used to obtain Li titanates with a developed specific surface area (SSA) and increased electrochemical activity for using Li-ion current sources as the anode material. [16][17][18][19] The Ti source in this method was Ti alkoxides [tetrabutoxy Ti (Ti(C 4 H 9 O) 4 ) or tetra-i-propoxy Ti [Ti{OCH(CH 3 ) 2 } 4 ], other metals were introduced as acetates, and the sol-gel process was carried out with a minimum amount of water 17,19 or in ethanol. 16,18 In a nonaqueous medium, Li 2 ZnTi 3 O 8 was synthesized by transforming Ti(C 4 H 9 O) 4 into a citrate form, followed by introducing of Li 2 CO 3 and Zn acetate and further heat treatment at 100 °C in ethylene glycol, leading to the formation of a polymer precursor, which then decomposed at 500-1000 °C.…”

Section: -12mentioning

confidence: 99%

“…In order to obtain Li titanates, a high‐temperature solid‐state synthesis method is used that provides the formation of dense ceramics by sintering a stoichiometric mixture of powders of titanium dioxide (TiO 2 ), lithium carbonate (Li 2 CO 3 ) and zinc oxide (ZnO) or acetate (synthesis of Li 2 ZnTi 3 O 8 9‐12 ), or with cobalt oxide (CoO) or acetate (synthesis of Li 2 CoTi 3 ), 13,14 or with Cu and Zn oxides (synthesis of Li 2 Cu x Zn 1‐x Ti 3 O 8 ) 15 . Along with the ceramic method, the sol–gel method was used to obtain Li titanates with a developed specific surface area (SSA) and increased electrochemical activity for using Li‐ion current sources as the anode material 16‐19 . The Ti source in this method was Ti alkoxides [tetrabutoxy Ti (Ti(C 4 H 9 O) 4 ) or tetra‐ i ‐propoxy Ti [Ti{OCH(CH 3 ) 2 } 4 ], other metals were introduced as acetates, and the sol–gel process was carried out with a minimum amount of water 17,19 or in ethanol 16,18 .…”

Section: Introductionmentioning

confidence: 99%

Comparison of different methods for Li₂MTi₃O₈ (M – Co, Cu, Zn) synthesis

Мацукевич

Кулак

Palkhouskaya

et al. 2021

J of Chemical Tech & Biotech

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BACKGROUND Mesoporous powders of lithium titanates Li2MTi3O8 (M – Co, Cu, Zn) of spinel structure are promising as anode materials for Li‐ion batteries. RESULTS Li2MTi3O8 (M – Co, Cu, Zn) were obtained by the sol–gel method, using self‐propagating high‐temperature synthesis (SHS) from glycine–citrate–nitrate mixtures, and also by the SHS method from aqueous solutions. The crystal structure, phase composition, microstructure and dispersion of the obtained materials were studied. CONCLUSION It was established that the SHS method for the synthesis of lithium titanates has several advantages compared with the sol–gel method, including not requiring solvents, reduced aggregation of particles, a higher specific surface area and low bulk density of the obtained powders. The electrode obtained on the basis of Zn‐containing Li titanate by the SHS method from glycine–citrate–nitrate mixtures showed the highest charging capacity of 160 mAh g−1 and high cyclic stability. © 2021 Society of Chemical Industry (SCI).

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“…On one hand, various methods have been used to improve the electrochemistry performance of graphite at low and elevated temperatures, such as mild oxidation [15], metal doping [16], design and assembly of electrode [7] and coating [17]. On the other hand, plenty of studies attempted to look for alternative anode materials with high cyclic capacity and rate capability for Li-ion batteries [18][19][20][21][22][23]. Among them, the temperature-dependent characters of carbon [6], Li 4 Ti 5 O 12 [24,25], Li 3 VO 4 [26] and the oxides (TiO 2 , SiO) [10,13,27] have been reported.…”

Section: Introductionmentioning

confidence: 99%

Influencing factors of low- and high-temperature behavior of Co-doped Zn2SnO4–graphene–carbon nanocomposite as anode material for lithium-ion batteries

Gao

Zhang

et al. 2017

Journal of Electroanalytical Chemistry

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Zn 2 SnO 4-based anode materials have recently attracted considerable attention due to their high capacity and low price for lithium-ion batteries. However, their performance is affected by temperature and temperature-dependent characters have not been investigated sufficiently. In this regard, we tested the electrochemistry performance of Co-doped Zn 2 SnO 4 −graphene−carbon (Co−ZTO−G−C) nanocomposite anode at various temperatures (−25, 25 and 60 °C) and analyzed the main limitations and improvements of its low-and high-temperature behavior. Cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) results demonstrated that severe concentration polarization, the absence of Zn 2 SnO 4 /Zn(Sn) redox couple and large charge-transfer resistance R ct limited its low-temperature performance. Further electrochemical performance analysis indicated that the doped Co could effectively decrease R ct of the nanocomposite and improve its capacity at low temperature. It also suggested that graphene and carbon layer contributed to maintaining its capacity during high-temperature cycles. Field emission scanning electron microscopy (FESEM) and X-ray diffraction (XRD) results revealed that the performance degeneration of the nanocomposite at elevated temperature was mainly attributed to severe volume expansion/contraction of Zn 2 SnO 4 nanoparticles and destruction of Zn 2 SnO 4 cubic structure. The XRD results also showed that the cubic structures of Zn 2 SnO 4 at all temperatures were destroyed after cycling, which led to cyclic performance degeneration of the Co−ZTO−G−C nanocomposite.

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Effect of particle size on the conductive and electrochemical properties of Li2ZnTi3O8

Cited by 13 publications

References 17 publications

Effect of Hf-doping on electrochemical performance of anatase TiO ₂ as an anode material for lithium storage

Effect of Hf-doping on electrochemical performance of anatase TiO ₂ as an anode material for lithium storage

Comparison of different methods for Li₂MTi₃O₈ (M – Co, Cu, Zn) synthesis

Influencing factors of low- and high-temperature behavior of Co-doped Zn2SnO4–graphene–carbon nanocomposite as anode material for lithium-ion batteries

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Effect of particle size on the conductive and electrochemical properties of Li2ZnTi3O8

Cited by 13 publications

References 17 publications

Effect of Hf-doping on electrochemical performance of anatase TiO 2 as an anode material for lithium storage

Effect of Hf-doping on electrochemical performance of anatase TiO 2 as an anode material for lithium storage

Comparison of different methods for Li2MTi3O8 (M – Co, Cu, Zn) synthesis

Influencing factors of low- and high-temperature behavior of Co-doped Zn2SnO4–graphene–carbon nanocomposite as anode material for lithium-ion batteries

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Effect of Hf-doping on electrochemical performance of anatase TiO ₂ as an anode material for lithium storage

Effect of Hf-doping on electrochemical performance of anatase TiO ₂ as an anode material for lithium storage

Comparison of different methods for Li₂MTi₃O₈ (M – Co, Cu, Zn) synthesis