EASY SYNTHESIS OF Li4Ti5O12/C MICROSPHERES CONTAINING NANOPARTICLES AS ANODE MATERIAL FOR HIGH-RATE Li-ION BATTERIES

2014 ◽  
Vol 21 (02) ◽  
pp. 1450023 ◽  
Author(s):  
XIAODONG ZHENG ◽  
LINA DONG ◽  
CHENCHU DONG
Keyword(s):  
Anode Material ◽  
Specific Capacity ◽  
Lithium Ion ◽  
High Rate ◽  
Conductive Network ◽  
Ion Diffusion ◽  
X Ray Diffraction ◽  
Compact Structure ◽  
Li Ion ◽  
Lithium Ion Diffusion

A microspherical Li 4 Ti 5 O 12/ C composite composed of interconnected nanoparticles with BP-2000 carbon black as carbon source is synthesized for use as an anode material in high-power lithium-ion batteries. The composite is prepared through precursor pretreatment including pre-sintering, ball-milling, and spray-drying. The structure, size and surface morphology of the as-prepared particles are investigated by X-ray diffraction and scanning electron microscopy. Results show that the obtained material has a microspherical morphology consisting of nanosized prime particles with compact structure. The precursor pretreatment effectively reduced the agglomeration of the prime particles caused by high temperature sintering and led to a more uniform distribution of BP-2000 on the surface of prime particles generating highly efficient conductive network. The specific capacity of the electrode at 20 C rate is 131 mAh g-1 and the loss of capacity is less than 2% after the 60 variation cycles (from 1 C to 20 C and back to 1 C). This excellent performance is attributed to the effective conductive network between the prime particles and the reduction of the lithium-ion diffusion pathway.

scholarly journals Improved conductivity and ionic mobility in nanostructured thin films via aliovalent doping for ultra-high rate energy storage

2020 ◽  
Vol 2 (5) ◽  
pp. 2160-2169
Author(s):  
Clayton T. Kacica ◽  
Pratim Biswas
Keyword(s):  
Thin Films ◽  
Energy Storage ◽  
Lithium Ion Battery ◽  
Lithium Ion ◽  
Ionic Mobility ◽  
High Rate ◽  
Ion Diffusion ◽  
Nanostructured Thin Films ◽  
Lithium Ion Diffusion ◽  
Aliovalent Doping

Synthesis of Cu-doped TiO2 nanostructures with excellent high-rate lithium-ion battery performance and enhanced lithium-ion diffusion.

scholarly journals NMR and Impedance Spectroscopy Studies on Lithium Ion Diffusion in Microcrystalline γ-LiAlO2

2015 ◽  
Vol 229 (9) ◽  
Author(s):  
Elena Witt ◽  
Suliman Nakhal ◽  
C. Vinod Chandran ◽  
Martin Lerch ◽  
Paul Heitjans
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Magnetic Resonance ◽  
Impedance Spectroscopy ◽  
Lithium Ion ◽  
Ion Dynamics ◽  
Ion Diffusion ◽  
Li Ion ◽  
Spectroscopy Studies ◽  
Lithium Ion Diffusion ◽  
Nuclear Magnetic

AbstractIn this work nuclear magnetic resonance (NMR) and impedance spectroscopy (IS) studies on Li ion dynamics in microcrystalline

TiO2(B)–CNT–graphene ternary composite anode material for lithium ion batteries

RSC Advances ◽  
2015 ◽  
Vol 5 (29) ◽  
pp. 22449-22454 ◽  
Author(s):  
Tao Shen ◽  
Xufeng Zhou ◽  
Hailiang Cao ◽  
Chao Zheng ◽  
Zhaoping Liu
Keyword(s):  
Lithium Ion Batteries ◽  
Anode Material ◽  
Lithium Ion ◽  
Cycling Stability ◽  
Conductive Network ◽  
Rate Performance ◽  
Li Ion Batteries ◽  
Composite Anode ◽  
Ternary Composite ◽  
Li Ion

The TiO2(B)–CNT–graphene ternary composite, in which graphene and CNTs construct a highly efficient conductive network, exhibits excellent rate performance and cycling stability as an anode material for Li-ion batteries.

scholarly journals Lithium-ion diffusion mechanisms in the battery anode material Li1+xV1−xO2

2014 ◽  
Vol 16 (39) ◽  
pp. 21114-21118 ◽  
Author(s):  
Pooja M. Panchmatia ◽  
A. Robert Armstrong ◽  
Peter G. Bruce ◽  
M. Saiful Islam
Keyword(s):  
Anode Material ◽  
Low Voltage ◽  
Lithium Ion ◽  
High Energy ◽  
High Energy Density ◽  
Ion Diffusion ◽  
Recent Interest ◽  
Diffusion Mechanisms ◽  
Lithium Ion Diffusion ◽  
Battery Anode

Layered Li1+xV1−xO2 has attracted recent interest as a potential low voltage and high energy density anode material for lithium-ion batteries.

Synthesis of MoO3/V2O5/C Composite as Novel Anode for Li-Ion Battery Application

2020 ◽  
Vol 20 (5) ◽  
pp. 2911-2916
Author(s):  
Zhen Zhang ◽  
Xiao Chen ◽  
Guangxue Zhang ◽  
Chuanqi Feng
Keyword(s):  
Electron Microscopy ◽  
Photoelectron Spectroscopy ◽  
Specific Capacity ◽  
Lithium Ion ◽  
Li Ion Battery ◽  
X Ray Diffraction ◽  
X Ray ◽  
Transmission Electron ◽  
Li Ion ◽  
Battery Application

The MoO3/V2O5/C, MoO3/C and V2O5/C are synthesized by electrospinning combined with heat treatment. These samples are characterized by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), transmission electron microscopy (TEM), Raman spectroscopy and thermogravimetric analysis (TG) techniques. The results show that sample MoO3/V2O5/C is a composite composed from MoO3, V2O5 and carbon. It takes on morphology of the nanofibers with the diameter of 200~500 nm. The TG analysis result showed that the carbon content in the composite is about 40.63%. Electrochemical properties for these samples are studied. When current density is 0.2 A g−1, the MoO3/V2O5/C could retain the specific capacity of 737.6 mAh g−1 after 200 cycles and its coulomb efficiency is 92.99%, which proves that MoO3/V2O5/C has better electrochemical performance than that of MoO3/C and V2O5/C. The EIS and linear Warburg coefficient analysis results show that the MoO3/V2O5/C has larger Li+ diffusion coefficient and superior conductivity than those of MoO3/C or V2O5/C. So MoO3/V2O5/C is a promising anode material for lithium ion battery application.

Ti3C2Tx-Based Electrodes with Enhanced Pseudocapacitance for High-Performance Lithium-ion Batteries

NANO ◽  
2020 ◽  
Vol 15 (04) ◽  
pp. 2050051
Author(s):  
Rudong Zheng ◽  
Lili Wu ◽  
Jiabao Zhao ◽  
Chuncheng Zhu ◽  
Hong Gao
Keyword(s):  
Lithium Ion Batteries ◽  
High Performance ◽  
Specific Capacity ◽  
Lithium Ion ◽  
Kinetic Mechanism ◽  
Ion Diffusion ◽  
Two Samples ◽  
New Type ◽  
Current Densities ◽  
Lithium Ion Diffusion

Ti3C2Tx, a new type of two-dimensional material, is a prospective anode material in lithium-ion batteries (LIBs) for its low lithium-ion diffusion barrier, high conductivity and many other excellent properties. In this paper, multilayer Ti3C2Tx and delaminated Ti3C2Tx samples are prepared by etching Ti3AlC2 powder with HF and [Formula: see text], respectively. We explore the application of the two samples in LIBs, and analyze their electrochemical behavior and kinetic mechanism. At the current densities of 0.1[Formula: see text]A[Formula: see text]g[Formula: see text], the delaminated Ti3C2Tx electrode delivered higher capacities of 255[Formula: see text]mAh[Formula: see text]g[Formula: see text] than multilayer Ti3C2Tx electrode (100[Formula: see text]mAh[Formula: see text]g[Formula: see text]). Even after 1000 cycles, the specific capacity of the delaminated Ti3C2Tx is still up to 205[Formula: see text]mAh[Formula: see text]g[Formula: see text] at 1[Formula: see text]A[Formula: see text]g[Formula: see text]. This work proves the great potential of the delaminated Ti3C2Tx for lithium-ion storage.

scholarly journals Electrospinning synthesis of 3D porous NiO nanorods as anode material for lithium-ion batteries

2016 ◽  
Vol 34 (2) ◽  
pp. 227-232 ◽  
Author(s):  
Xiang Wei Kong ◽  
Rong Liang Zhang ◽  
Sheng Kui Zhong ◽  
Ling Wu
Keyword(s):  
Anode Material ◽  
Specific Capacity ◽  
3D Structure ◽  
Three Dimensional ◽  
Lithium Ion ◽  
Metallic Nickel ◽  
X Ray Diffraction ◽  
X Ray ◽  
Electrospinning Method ◽  
A Current

AbstractThree-dimensional NiO nanorods were synthesized as anode material by electrospinning method. X-ray diffraction results revealed that the product sintered at 400 °C had impure metallic nickel phase which, however, became pure NiO phase as the sintering temperature rose. Nevertheless, the nanorods sintered at 400, 500 and 600 °C had similar diameters (∼200 nm).The NiO nanorod material sintered at 500 °C was chip-shaped with a diameter of 200 nm and it exhibited a porous 3D structure. The nanorod sintered at 500 °C had the optimal electrochemical performance. Its discharge specific capacity was 1127 mAh·g−1 initially and remained as high as 400 mAh·g−1 at a current density of 55 mA·g−1 after 50 cycles.

scholarly journals Effect of Ni2+ on Lithium-Ion Diffusion in Layered LiNi1−x−yMnxCoyO2 Materials

Crystals ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 465
Author(s):  
Yuanyuan Zhu ◽  
Yang Huang ◽  
Rong Du ◽  
Ming Tang ◽  
Baotian Wang ◽  
...  
Keyword(s):  
Diffusion Coefficient ◽  
Lithium Ion ◽  
Ion Diffusion ◽  
Local Coordination ◽  
Excellent Electrochemical Performance ◽  
Layered Cathode Materials ◽  
Li Ion ◽  
Dynamics Simulations ◽  
And Diffusion ◽  
Lithium Ion Diffusion

LiNi1−x−yMnxCoyO2 materials are a typical class of layered cathode materials with excellent electrochemical performance in lithium-ion batteries. Molecular dynamics simulations are performed for LiNi1−x−yMnxCoyO2 materials with different transition metal ratios. The Li/Ni exchange ratio, ratio of anti-site Ni2+ to total Ni2+, and diffusion coefficient of Li ions in these materials are calculated. The results show that the Li-ion diffusion coefficient strongly depends on the ratio of anti-site Ni2+ to total Ni2+ because their variation tendencies are similar. In addition, the local coordination structure of the Li/Ni anti-site is analyzed.

scholarly journals Operando Calorimetry Informs the Origin of Rapid Rate Performance in Microwave-Prepared TiNb2O7 Electrodes

2020 ◽  
Author(s):  
Sun Woong Baek ◽  
Kira E. Wyckoff ◽  
Danielle M. Butts ◽  
Jadon Bienz ◽  
AMPOL LIKITCHATCHAWANKUN ◽  
...  
Keyword(s):  
Synthesis Method ◽  
Lithium Ion ◽  
Enthalpy Of Mixing ◽  
High Rate ◽  
Rapid Rate ◽  
Rate Performance ◽  
Ion Diffusion ◽  
Phase Compound ◽  
Graphite Anodes ◽  
Lithium Ion Diffusion

<div>The shear-phase compound TiNb<sub>2</sub>O<sub>7</sub> has recently emerged as a safe and high-volumetric density replacement for graphite anodes in lithium ion batteries. An appealing feature of TiNb<sub>2</sub>O<sub>7</sub> is that it retains capacity even at high cycling rates. Here we demonstrate that phase pure and crystalline TiNb<sub>2</sub>O<sub>7</sub> can be rapidly prepared using a high-temperature microwave synthesis method. Studies of the charging and discharging of this material, including through operando calorimetry, permit key thermodynamic parameters to be revealed. The nature of heat generation is dominated by Joule heating, which sensitively changes as the conductivity of the electrode increases with increasing lithiation. The enthalpy of mixing, obtained from operando calorimetry, is found to be small across the different degrees of lithiation pointing to the high rate of lithium ion diffusion at the origin of rapid rate performance.</div>

scholarly journals Operando Calorimetry Informs the Origin of Rapid Rate Performance in Microwave-Prepared TiNb2O7 Electrodes

2020 ◽  
Author(s):  
Sun Woong Baek ◽  
Kira E. Wyckoff ◽  
Danielle M. Butts ◽  
Jadon Bienz ◽  
AMPOL LIKITCHATCHAWANKUN ◽  
...  
Keyword(s):  
Synthesis Method ◽  
Lithium Ion ◽  
Enthalpy Of Mixing ◽  
High Rate ◽  
Rapid Rate ◽  
Rate Performance ◽  
Ion Diffusion ◽  
Phase Compound ◽  
Graphite Anodes ◽  
Lithium Ion Diffusion

<div>The shear-phase compound TiNb<sub>2</sub>O<sub>7</sub> has recently emerged as a safe and high-volumetric density replacement for graphite anodes in lithium ion batteries. An appealing feature of TiNb<sub>2</sub>O<sub>7</sub> is that it retains capacity even at high cycling rates. Here we demonstrate that phase pure and crystalline TiNb<sub>2</sub>O<sub>7</sub> can be rapidly prepared using a high-temperature microwave synthesis method. Studies of the charging and discharging of this material, including through operando calorimetry, permit key thermodynamic parameters to be revealed. The nature of heat generation is dominated by Joule heating, which sensitively changes as the conductivity of the electrode increases with increasing lithiation. The enthalpy of mixing, obtained from operando calorimetry, is found to be small across the different degrees of lithiation pointing to the high rate of lithium ion diffusion at the origin of rapid rate performance.</div>

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