Aqueous Synthesized Nanostructured Li4Ti5O12for High-Performance Lithium Ion Battery Anodes

Chiu, Hsien‐Chieh; Brodusch, Nicolas; Gauvin, Raynald; Guerfi, Abdelbast; Zaghib, Karim; Demopoulos, George P.

doi:10.1149/2.008305jes

Cited by 22 publications

(14 citation statements)

References 51 publications

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“…The discharge capacities of the second and third cycles are approximately 286 and 271 mAh g −1 , respectively, with the coulombic efficiency significantly improved. The initial discharge capacity of the hierarchical Li 4 Ti 5 O 12 /TiO 2 tubes at 0.01 A g −1 (approximately C/16) is much higher than that of the nanostructured Li 4 Ti 5 O 12 at even lower current density (approximately 228 mAh g −1 at C/24)28. As revealed by the TEM observed, the grain boundary density of the Li 4 Ti 5 O 12 /TiO 2 tubes can be significantly increased by introducing TiO 2 crystallites into the nanoflakes.…”

Section: Resultsmentioning

confidence: 90%

Hierarchical Li4Ti5O12/TiO2 composite tubes with regular structural imperfection for lithium ion storage

Jiang

Wang

Zhang

et al. 2013

Sci Rep

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Hierarchical Li4Ti5O12/TiO2 tubes composed of ultrathin nanoflakes have been successfully fabricated via the calcination of the hydrothermal product of a porous amorphous TiO2 precursor and lithium hydroxide monohydrate. The hierarchical tubes are characterized by powder X-ray diffraction, nitrogen adsorption/desorption, scanning electron microscopy and transmission electron microscopy techniques. These nanoflakes exhibit a quite complex submicroscopic structure with regular structural imperfection, including a huge number of grain boundaries and dislocations. The lithium ion storage property of these tubes is evaluated by galvanostatic discharge/charge experiment. The product shows initial discharge capacities of 420, 225, and 160 mAh g−1 at 0.01, 0.1, and 1.0 A g−1, respectively. After 100 cycles, the discharge capacity is 139 mAh g−1 at 1.0 A g−1 with a capacity retention of 87%, demonstrating good high-rate performance and good cycleability. The high electrochemical performance is attributed to unique structure and morphology of the tubes. The regular structural imperfection existed in the nanoflakes also benefit to lithium ion storage property of these tubes. The hierarchical Li4Ti5O12/TiO2 tubes are a promising anode material for lithium-ion batteries with high power and energy densities.

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Section: Resultsmentioning

confidence: 90%

Hierarchical Li4Ti5O12/TiO2 composite tubes with regular structural imperfection for lithium ion storage

Jiang

Wang

Zhang

et al. 2013

Sci Rep

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“…The different phase Li 2 FeSiO 4 nanoparticles are synthesized via preparation of an amorphous colloidal precipitate that is subsequently subjected to annealing, a method adapted from procedures developed for lithium titanate and lithium iron phosphate nanomaterials3744. In a typical test, stoichiometric amounts (0.015 mol) of Fe(NO 3 ) 3 · 9H 2 O powder and fumed SiO 2 powder were added into 70 mL distilled water while continuously stirring.…”

Section: Exprimental Sectionmentioning

confidence: 99%

Rate-dependent phase transitions in Li2FeSiO4 cathode nanocrystals

Wei

Chiu

et al. 2015

Sci Rep

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Nanostructured lithium metal orthosilicate materials hold a lot of promise as next generation cathodes but their full potential realization is hampered by complex crystal and electrochemical behavior. In this work Li2FeSiO4 crystals are synthesized using organic-assisted precipitation method. By varying the annealing temperature different structures are obtained, namely the monoclinic phase at 400°C, the orthorhombic phase at 900°C, and a mixed phase at 700°C. The three Li2FeSiO4 crystal phases exhibit totally different charge/discharge profiles upon delithiation/lithiation. Thus the 400°C monoclinic nanocrystals exhibit initially one Li extraction via typical solid solution reaction, while the 900°C orthorhombic crystals are characterized by unacceptably high cell polarization. In the meantime the mixed phase Li2FeSiO4 crystals reveal a mixed cycling profile. We have found that the monoclinic nanocrystals undergo phase transition to orthorhombic structure resulting in significant progressive deterioration of the material's Li storage capability. By contrast, we discovered when the monoclinic nanocrystals are cycled initially at higher rate (C/20) and subsequently subjected to low rate (C/50) cycling the material's intercalation performance is stabilized. The discovered rate-dependent electrochemically-induced phase transition and stabilization of lithium metal silicate structure provides a novel and potentially rewarding avenue towards the development of high capacity Li-ion cathodes.

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“…1,3 Recently, flower-like nanostructures have been used in a wide range of research fields, such as, gas sensors, 4,5 biosensors, 6,7 batteries, 8 organic synthesis, 9 photoelectrochemistry 10 and fuel cells (FCs) catalysts. 1,3,11,12 However, little efforts have been made in the fabrication of 3D nanoflower Pd nanostructures.…”

Section: 2mentioning

confidence: 99%

Synthesis and Electrocatalytic Activity Evaluation of Nanoflower Shaped Ni-Pd on Alcohol Oxidation Reaction

Ahmed

2014

J. Electrochem. Soc.

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We are reporting a synthesis of nickel and palladium (Ni-Pd) nanoflowers with excellent size and Calendula-like shapes using a wet-chemistry method for efficient alcohol oxidation reaction (AOR). The nanoflower structure has shown to have electrocatalytic activity to monohydric shorter carbon chain containing alcohols (C1-C4; methanol, ethanol, propanol and n-butanol). The X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS) reveal that the Ni-Pd nanoflowers catalyst has different electronic behavior due to flower-like structure and comparatively higher degree of alloy formation. The transmission electron microscopy (TEM) images showed a Calendula flower-like shape and crystalline structure of Ni-Pd. The electrochemical properties of the catalyst have been evaluated by cyclic voltammetry (CV) and chronoamperometry (CA) in 1 M KOH electrolyte. For the first time, a comparative kinetic analysis has been investigated between four alcohol's catalysis. The higher electrocatalytic activity has increased in the order of C3 > C4 > C1 > C2. The overall AOR kinetic study has determined that the Ni-Pd is favorable due to Ni mediated alloyed formation and flower-like structure. The 3D flower-like nanostructures have been proven to be an effective way to improve the electrocatalytic activity and tolerance to poisoning intermediates of palladium (Pd) based electrocatalysts. 1,2The flower-like nanostructure of Pd or Pd alloy have been generated a huge interest due to their advantages, such as, larger surface area, highly active centers and corner atoms. 1 Most research efforts have been limited to the fabrication and application of Pd nanoparticles (NPs) due to strong redox catalytic effect, 13 whereas, the nanoflower structures have been shown to be more active and stable than their NPs format for the electrooxidation of methanol in alkaline medium.1 Therefore, it remains a challenge to directly synthesize Pd based nanoflowers via a chemical route and to compare these with PdNPs and/or Pd composite catalysts.Meanwhile, the platinum (Pt) based catalysts act as the best electrocatalysts in FCs, [14][15][16] that have been suffering from multiple problems, such as, the slow reaction kinetics, CO poisoning, the high cost, limited reserve in nature, poor durability and high CO 2 prodiction. [17][18][19][20][21][22][23] It is, however, aiming at reducing the usage of the precious Pt metal and hence the cost of FCs, the development of non-Pt electrocatalysts has thus generated a great deal of interest.9 It has shown that the Pd is a promising electrocatalyst because of much cheaper than Pt and highly electroactive to the small organic molecules (i.e. lowmolecular weight alcohols) oxidation in alkaline media 1,3,24-26 for direct alcohol fuel cells (DAFCs) and/or proton exchange membrane fuel cells (PEMFCs), that are regarded as promising future and clean power sources. 27,28The addition of transition metal like nickel (Ni) to Pd can obviously further improve the overall electrocatalytic activities of Pd because of the b...

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Aqueous Synthesized Nanostructured Li₄Ti₅O₁₂for High-Performance Lithium Ion Battery Anodes

Cited by 22 publications

References 51 publications

Hierarchical Li4Ti5O12/TiO2 composite tubes with regular structural imperfection for lithium ion storage

Hierarchical Li4Ti5O12/TiO2 composite tubes with regular structural imperfection for lithium ion storage

Rate-dependent phase transitions in Li2FeSiO4 cathode nanocrystals

Synthesis and Electrocatalytic Activity Evaluation of Nanoflower Shaped Ni-Pd on Alcohol Oxidation Reaction

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