Solid-state synthesis of Ti2Nb10O29/reduced graphene oxide composites with enhanced lithium storage capability

Wang, Wan Lin; Oh, Byeong Yun; Park, Ju‐Young; Ki, Hangil; Jang, Jaewon; Lee, Gab-Yong; Gu, Hal-Bon; Ham, Moon‐Ho

doi:10.1016/j.jpowsour.2015.09.078

Cited by 89 publications

(35 citation statements)

References 45 publications

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“…reported (185 mAh g −1 ), which may be ascribed to the better material and cell fabrication processes in this work. The capacities of the FeNb 11 O 29 and FeNb 11 O 27.9 samples at 0.1 C in this work are comparable with those of the previously reported Ti 2 Nb 10 O 29 materials ,,,,…”

Section: Resultssupporting

confidence: 91%

Crystal Structure Modification Enhanced FeNb₁₁O₂₉ Anodes for Lithium‐Ion Batteries

et al. 2017

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The recently explored FeNb11O29 is an advanced anode material for lithium‐ion batteries, owing to its high specific capacity and safety. However, it suffers from poor rate capability. To tackle this issue, a crystal structure modification is employed. Defective FeNb11O29 (FeNb11O27.9) is fabricated by using a one‐step solid‐state reaction method in N2. FeNb11O27.9 has the same orthorhombic shear ReO3 crystal structure (Amma space group) as FeNb11O29, but a larger unit‐cell volume and 3.8 % O2− vacancies (vs. all O2− ions), which improve the Li+‐ion diffusion coefficient by a factor of 88.3 %. The contained Nb4+ ions with free 4d electrons significantly increase the electronic conductivity by three orders of magnitude. Consequently, FeNb11O27.9 shows improved pseudocapacitive behavior and electrochemical properties. In comparison with FeNb11O29, FeNb11O27.9 exhibits a higher reversible capacity of 270 mAh g−1 with a higher first‐cycle coulombic efficiency of 90.6 % at 0.1 C. At 10 C, FeNb11O27.9 still retains a high capacity of 145 mAh g−1 with low capacity loss of 6.9 % after 200 cycles, in contrast to the values of 99 mAh g−1 and 11.1 % obtained for FeNb11O29.

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Section: Resultssupporting

confidence: 91%

Crystal Structure Modification Enhanced FeNb₁₁O₂₉ Anodes for Lithium‐Ion Batteries

et al. 2017

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“…Each peak is expressed in the curves (C p and A p mean the cathodic peaks and anodic peaks). Although the reduction peaks were C p1 (Ti 4+ → Ti 3+ ), C p2 (Nb 5+ → Nb 4+ ), and C p3 (Nb 4+ → Nb 3+ ), A p1 , A p2 , and A p3 mean the oxidation reaction of Nb 3+ → Nb 4+ , Nb 4+ → Nb 5+ , and Ti 3+ → Ti 4+ 10,15 . These potential regions of the current peaks were matched with the plateau regions in charge and discharge curves.…”

Section: Resultsmentioning

confidence: 97%

“…The material is composed a large number of Nb ions and has a higher theoretical capacity (397 mA/g) than TiNb 2 O 7 and Ti 2 Nb 10 O 29 . Moreover, the material has the same Wisely-Roth structure (monoclinic) but larger lattice parameters and unit cell volume than TiNb 2 O 7 and Ti 2 Nb 10 O 29 (1122.541 Å vs. 803.21 Å, 1118.512 Å) due to the larger number of Nb 5+ ions with a larger size (0.64 Å) than that of Ti 4+ ions (0.605 Å) 13–15 . This causes a more open lithium insertion/insertion site and improved rate performance; the schema of this theory is listed in Fig.…”

Section: Introductionmentioning

confidence: 99%

Study of the lithium diffusion properties and high rate performance of TiNb6O17 as an anode in lithium secondary battery

Lee

Ryu

2017

Sci Rep

150

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TiNb6O17 and TiNb2O7 were synthesized using a solid-state method. The techniques were used to assess the electrochemical performance and lithium diffusion kinetics of TiNb6O17 related to the unit cell volume with TiNb2O7. The charge-discharge curves and cyclic voltammetry revealed TiNb6O17 to have a similar redox potential to TiNb2O7 as well as a high discharge capacity. The rate performance of TiNb6O17 was measured using a rate capability test. SSCV and EIS showed that TiNb6O17 had higher lithium diffusion coefficients during the charging. From GITT, the lithium diffusion coefficients at the phase transition region showed the largest increase from TiNb2O7 to TiNb6O17.

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“…The ultrathin TiO 2 nanosheets (NSs) with a thickness of only a few nanometers along the [001] direction and exposed (001) facets have proven to be a suitable candidate for fast speed lithiation processes in LIBs. 129 Utilizing the unique strength of a carbon substrate in the same way, Wang et al 130 adopted rGO (reduced graphene oxide) as the matrix for a kind of bimetal oxide (Ti 2 Nb 10 O 29 ) to collectively constitute the anode whose rate capability and cycle performance are both enhanced compared to those of the bare transition metal oxide.…”

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confidence: 99%

Nanostructured anode materials for lithium-ion batteries: principle, recent progress and future perspectives

et al. 2017

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As the most commonly used potential energy conversion and storage devices, lithium-ion batteries (LIBs) have been extensively investigated for a wide range of fields including information technology, electric and hybrid vehicles, aerospace, etc. Endowed with attractive properties such as high energy density, long cycle life, small size, low weight, few memory effects and low pollution, LIBs have been recognized as the most likely approach to be used to store electrical power in the future. This review will start with a brief introduction to charge-discharge principles and performance assessment indices. The advantages and disadvantages of several commonly studied anode materials including carbon, alloys, transition metal oxides and silicon along with lithium intercalation will be reviewed. The mechanism and synthesis methods, followed by strategies to enhance battery performance by virtue of interesting structural designs will be examined. Finally, a few issues needing further exploration will be discussed followed by a brief outline of the prospects and outlook for the LIB field.

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Solid-state synthesis of Ti2Nb10O29/reduced graphene oxide composites with enhanced lithium storage capability

Cited by 89 publications

References 45 publications

Crystal Structure Modification Enhanced FeNb₁₁O₂₉ Anodes for Lithium‐Ion Batteries

Crystal Structure Modification Enhanced FeNb₁₁O₂₉ Anodes for Lithium‐Ion Batteries

Study of the lithium diffusion properties and high rate performance of TiNb6O17 as an anode in lithium secondary battery

Nanostructured anode materials for lithium-ion batteries: principle, recent progress and future perspectives

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Solid-state synthesis of Ti2Nb10O29/reduced graphene oxide composites with enhanced lithium storage capability

Cited by 89 publications

References 45 publications

Crystal Structure Modification Enhanced FeNb11O29 Anodes for Lithium‐Ion Batteries

Crystal Structure Modification Enhanced FeNb11O29 Anodes for Lithium‐Ion Batteries

Study of the lithium diffusion properties and high rate performance of TiNb6O17 as an anode in lithium secondary battery

Nanostructured anode materials for lithium-ion batteries: principle, recent progress and future perspectives

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Product

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Crystal Structure Modification Enhanced FeNb₁₁O₂₉ Anodes for Lithium‐Ion Batteries

Crystal Structure Modification Enhanced FeNb₁₁O₂₉ Anodes for Lithium‐Ion Batteries