Ti-substituted tunnel-type Na0.44MnO2 oxide as a negative electrode for aqueous sodium-ion batteries

Wang, Yue-Sheng; Liu, Jue; Lee, Byungju; Qiao, Ruimin; Yang, Zhenzhong; Xu, Shuyin; Yu, Xiqian; Gu, Lin; Hu, Yong‐Sheng; Yang, Wanli; Kang, Kisuk; Li, Hong; Yang, Xiao‐Qing; Chen, Liquan; Huang, Xuejie

doi:10.1038/ncomms7401

Cited by 338 publications

(211 citation statements)

References 59 publications

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“…In the past few years, many compounds including layer‐structured oxide and polyanionic phosphates have been investigated to find a suitable cathode material for reversible and rapid intercalation/deintercalation of Na + 7, 8, 9, 10, 11, 12, 13, 14. Among them, sodium super ion conductor (NASICON) structured Na 3 V 2 (PO 4 ) 3 with 3D open framework and large tunnels for Na + migration has aroused an extensive interest as cathode materials for SIBs owing to its superiority of good stability, moderate potential plateau, high energy density, and so on 14, 15, 16, 17, 18.…”

Section: Introductionmentioning

confidence: 99%

Boron Substituted Na₃V₂(P₁_−xB_xO₄)₃ Cathode Materials with Enhanced Performance for Sodium‐Ion Batteries

Wang

et al. 2016

Advanced Science

102

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The development of excellent performance of Na‐ion batteries remains great challenge owing to the poor stability and sluggish kinetics of cathode materials. Herein, B substituted Na3V2P3 –xBxO12 (0 ≤ x ≤ 1) as stable cathode materials for Na‐ion battery is presented. A combined experimental and theoretical investigations on Na3V2P3 –xBxO12 (0 ≤ x ≤ 1) are undertaken to reveal the evolution of crystal and electronic structures and Na storage properties associated with various concentration of B. X‐ray diffraction results indicate that the crystal structure of Na3V2P3 –xBxO12 (0 ≤ x ≤ 1/3) consisted of rhombohedral Na3V2(PO4)3 with tiny shrinkage of crystal lattice. X‐ray absorption spectra and the calculated crystal structures all suggest that the detailed local structural distortion of substituted materials originates from the slight reduction of V–O distances. Na3V2P3‐1/6B1/6O12 significantly enhances the structural stability and electrochemical performance, giving remarkable enhanced capacity of 100 and 70 mAh g−1 when the C‐rate increases to 5 C and 10 C. Spin‐polarized density functional theory (DFT) calculation reveals that, as compared with the pristine Na3V2(PO4)3, the superior electrochemical performance of the substituted materials can be attributed to the emergence of new boundary states near the band gap, lower Na+ diffusion energy barriers, and higher structure stability.

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Section: Introductionmentioning

confidence: 99%

Boron Substituted Na₃V₂(P₁_−xB_xO₄)₃ Cathode Materials with Enhanced Performance for Sodium‐Ion Batteries

Wang

et al. 2016

Advanced Science

102

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“…This is similar to what is observed in Na-ion batteries where titanium-substituted Na 0.44 MnO 2 contains 0.66 Na atoms at the end of discharge. 10 On both charge and discharge a continuous change, with no clear features in the voltage is observed. This is similar to titanium-substituted Na 0.44 MnO 2 where the absence of clear voltage plateaus has been ascribed to disorder between the Mn and Ti ions suppressing Na vacancy ordering.…”

Section: Resultsmentioning

confidence: 99%

“…11,12 A series of titanium-substituted Na 0.44 MnO 2 and Li 0.44 MnO 2 materials, in which Ti 4+ partially occupies MO 6 polyhedra, have also been reported as positive electrodes for sodium and lithium-ion batteries. 10 Doping with titanium increases the unit cell size and in the case of lithiated materials, raises the potential of lithium intercalation/deintercalation 13 and leads to higher capacities. For instance, Li x Ti 0.22 Mn 0.78 O 2 is reported to deliver about 10-20% more capacity than Li x MnO 2 .…”

mentioning

confidence: 99%

“…Na 0.44 MnO 2 is particularly interesting because of its large tunnels for sodium intercalation/deintercalation [4][5][6][7][8][9][10] which results in high capacities and rate performance. The structure of Na 0.44 MnO 2 is comprised of two and three leg chains of edge-sharing polyhedra which share corners to form a three-dimensional network with two crystallographically distinct tunnels along the z axis, as shown in Figure 1.…”

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confidence: 99%

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LiMnTiO₄with the Na_0.44MnO₂Structure as a Positive Electrode for Lithium-Ion Batteries

Amigues¹,

Glass²

2015

J. Electrochem. Soc.

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A metastable polymorph of LiMnTiO 4 with the Na 0.44 MnO 2 structure has been synthesized via ion-exchange from its sodium analogue, NaMnTiO 4 . The structure was determined from a combination of X-ray and Neutron Powder Diffraction data. LiMnTiO 4 has the Pbam space group, with a = 9.074(5), b = 24.97(1) and c = 2.899(2) Å. The shapes and dimensions of the channels are slightly modified as compared to NaMnTiO 4 with displaced alkali metal positions and occupancies. LiMnTiO 4 was cycled vs Li at room temperature and up to 0.89 lithium ions can be reversibly inserted into the structure, with a discharge capacity of 137 mAh/g after 20 cycles at C/20. At 60 • C all the lithium is removed at the end of the first charge at C/20, with subsequent cycles showing reversible insertion of 1.06 Li-ions. © The Author Lithium-ion batteries are widely used in consumer electronics. However, efficiency, rate capability, cost and safety are all still issues which limit the current use of Li-ion batteries. The limiting component in Li-ion batteries is the positive electrode and as such this has been the focus of much research. One of the most promising positive electrodes is LiFePO 4 which crystallizes in the olivine structure with Li ions in one dimensional channels. LiFePO 4 exhibits high thermal stability, is environmentally benign and has good electrochemical properties, reaching 90% of its theoretical capacity when coated with carbon.1,2 However, its relatively low operating voltage of 3.3 V, and its poor electronic conductivity leads to limitations when cycled at high rates and makes it suitable for low power applications only. Despite these factors, there has been an increased interest in cathode materials possessing one-dimensional channels due to the high stability upon lithiation and delithiation demonstrated by LiFePO 4 .One such material with one-dimensional channels is Na 0.44 MnO 2 . Na 0.44 MnO 2 is particularly interesting because of its large tunnels for sodium intercalation/deintercalation 4-10 which results in high capacities and rate performance. The structure of Na 0.44 MnO 2 is comprised of two and three leg chains of edge-sharing polyhedra which share corners to form a three-dimensional network with two crystallographically distinct tunnels along the z axis, as shown in Figure 1. The transitional metal oxide framework is complex having MO 6 /MO 5 polyhedra occupied by either Mn 3+ or Mn 4+ ions. This ordering is driven by the Jahn-Teller distortions from the d 4 Mn 3+ cations present in the structure. The Na-ions occupy sites in both the smaller, one dimensional (1D) and larger S-shaped channels with co-ordination to oxygen of 7 in the 1D channels and 6 and 7 in the S-shaped channels. The partial occupancy of Na + is reported to allow for the observed high capacities, enhanced ionic conductivity and rate performance. The lithiated analogue of Na 0.44 MnO 2 has been reported to have outstanding cycling at room temperature and 85• C, delivering 80 to 95% of the theoretical capacity, 131 mAh/g, with high rate d...

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“…However, suffered from the intrinsic defect of larger ionic radius ( R Na+ = 1.02 Å vs R Li+ = 0.76 Å), there are more challenges to the cathode materials for SIBs compared to LIBs, such as unappeasable structural stability and sluggish ion diffusion resulting in undesirable sodium storage properties 5. To address these issues, numerous researchers are devoting themselves to discover new materials and design traditional materials to accommodate larger Na + and enable highly reversible (de‐)sodiation 5, 6, 7…”

Section: Introductionmentioning

confidence: 99%

Caging Na₃V₂(PO₄)₂F₃ Microcubes in Cross‐Linked Graphene Enabling Ultrafast Sodium Storage and Long‐Term Cycling

et al. 2018

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Sodium‐ion batteries are widely regarded as a promising supplement for lithium‐ion battery technology. However, it still suffers from some challenges, including low energy/power density and unsatisfactory cycling stability. Here, a cross‐linked graphene‐caged Na3V2(PO4)2F3 microcubes (NVPF@rGO) composite via a one‐pot hydrothermal strategy followed by freeze drying and heat treatment is reported. As a cathode for a sodium‐ion half‐cell, the NVPF@rGO delivers excellent cycling stability and rate capability, as well as good low temperature adaptability. The structural evolution during the repeated Na+ extraction/insertion and Na ions diffusion kinetics in the NVPF@rGO electrode are investigated. Importantly, a practicable sodium‐ion full‐cell is constructed using a NVPF@rGO cathode and a N‐doped carbon anode, which delivers outstanding cycling stability (95.1% capacity retention over 400 cycles at 10 C), as well as an exceptionally high energy density (291 Wh kg−1 at power density of 192 W kg−1). Such micro‐/nanoscale design and engineering strategies, as well as deeper understanding of the ion diffusion kinetics, may also be used to explore other micro‐/nanostructure materials to boost the performance of energy storage devices.

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Ti-substituted tunnel-type Na0.44MnO2 oxide as a negative electrode for aqueous sodium-ion batteries

Cited by 338 publications

References 59 publications

Boron Substituted Na₃V₂(P₁_−xB_xO₄)₃ Cathode Materials with Enhanced Performance for Sodium‐Ion Batteries

Boron Substituted Na₃V₂(P₁_−xB_xO₄)₃ Cathode Materials with Enhanced Performance for Sodium‐Ion Batteries

LiMnTiO₄with the Na_0.44MnO₂Structure as a Positive Electrode for Lithium-Ion Batteries

Caging Na₃V₂(PO₄)₂F₃ Microcubes in Cross‐Linked Graphene Enabling Ultrafast Sodium Storage and Long‐Term Cycling

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Ti-substituted tunnel-type Na0.44MnO2 oxide as a negative electrode for aqueous sodium-ion batteries

Cited by 338 publications

References 59 publications

Boron Substituted Na3V2(P1−xBxO4)3 Cathode Materials with Enhanced Performance for Sodium‐Ion Batteries

Boron Substituted Na3V2(P1−xBxO4)3 Cathode Materials with Enhanced Performance for Sodium‐Ion Batteries

LiMnTiO4with the Na0.44MnO2Structure as a Positive Electrode for Lithium-Ion Batteries

Caging Na3V2(PO4)2F3 Microcubes in Cross‐Linked Graphene Enabling Ultrafast Sodium Storage and Long‐Term Cycling

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Product

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Boron Substituted Na₃V₂(P₁_−xB_xO₄)₃ Cathode Materials with Enhanced Performance for Sodium‐Ion Batteries

Boron Substituted Na₃V₂(P₁_−xB_xO₄)₃ Cathode Materials with Enhanced Performance for Sodium‐Ion Batteries

LiMnTiO₄with the Na_0.44MnO₂Structure as a Positive Electrode for Lithium-Ion Batteries

Caging Na₃V₂(PO₄)₂F₃ Microcubes in Cross‐Linked Graphene Enabling Ultrafast Sodium Storage and Long‐Term Cycling