Structural Evolution and Electrochemical Performance of Li2MnSiO4/C Nanocomposite as Cathode Material for Li-Ion Batteries

High capacity Li2MnSiO4/C nanocomposite with good rate performance was prepared via a facile sol-gel method using ascorbic acid as carbon source. It had a uniform distribution on particle size of approximately 20 nm and a thin outlayer of carbon. The galvanostatic charge-discharge measurement showed that the Li2MnSiO4/C electrode could deliver an initial discharge capacity of 257.1 mA h g−1(corresponding to 1.56 Li+) at a current density of 10 mA g−1at 30°C, while the Li2MnSiO4electrode possessed a low capacity of 25.6 mA h g−1. Structural amorphization resulting from excessive extraction of Li+during the first charge was the main reason for the drastic capacity fading. Controlling extraction of Li+could inhibit the amorphization of Li2MnSiO4/C during the delithiation, contributing to a reversible structural change and good cycling performance.

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Electrospun Fe3O4-Sn@Carbon Nanofibers Composite as Efficient Anode Material for Li-Ion Batteries

Nanomaterials ◽

10.3390/nano11092203 ◽

2021 ◽

Vol 11 (9) ◽

pp. 2203

Author(s):

Hong Wang ◽

Yuejin Ma ◽

Wenming Zhang

Keyword(s):

Anode Materials ◽

Electrochemical Reaction ◽

Active Material ◽

Specific Capacity ◽

Lithium Ion ◽

Cycling Performance ◽

Solvothermal Reaction ◽

Li Ion Batteries ◽

Li Ion ◽

A Current

Nanoscale Fe3O4-Sn@CNFs was prepared by loading Fe3O4 and Sn nanoparticles onto CNFs synthesized via electrostatic spinning and subsequent thermal treatment by solvothermal reaction, and were used as anode materials for lithium-ion batteries. The prepared anode delivers an excellent reversible specific capacity of 1120 mAh·g−1 at a current density of 100 mA·g−1 at the 50th cycle. The recovery rate of the specific capacity (99%) proves the better cycle stability. Fe3O4 nanoparticles are uniformly dispersed on the surface of nanofibers with high density, effectively increasing the electrochemical reaction sites, and improving the electrochemical performance of the active material. The rate and cycling performance of the fabricated electrodes were significantly improved because of Sn and Fe3O4 loading on CNFs with high electrical conductivity and elasticity.

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Hierarchical Porous Acetylene Black/ZnFe2O4@Carbon Hybrid Materials with High Capacity and Robust Cycling Performance for Li-ion Batteries

Electrochimica Acta ◽

10.1016/j.electacta.2015.11.095 ◽

2016 ◽

Vol 187 ◽

pp. 584-592 ◽

Cited By ~ 35

Author(s):

Junjie Cai ◽

Chun Wu ◽

Ying Zhu ◽

Pei Kang Shen ◽

Kaili Zhang

Keyword(s):

Hybrid Materials ◽

High Capacity ◽

Cycling Performance ◽

Acetylene Black ◽

Li Ion Batteries ◽

Hierarchical Porous ◽

Li Ion

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Li Conductivity of Nanocrystalline Li4Ti5O12 Prepared by a Sol-Gel Method and High-Energy Ball Milling

Defect and Diffusion Forum ◽

10.4028/www.scientific.net/ddf.289-292.565 ◽

2009 ◽

Vol 289-292 ◽

pp. 565-570 ◽

Cited By ~ 11

Author(s):

W. Iwaniak ◽

J. Fritzsche ◽

M. Zukalová ◽

R. Winter ◽

Martin Wilkening ◽

...

Keyword(s):

Particle Size ◽

Crystallite Size ◽

Sol Gel ◽

High Energy ◽

Average Particle ◽

Li Ion Batteries ◽

Gel Method ◽

Sol Gel Method ◽

Li Ion ◽

20 Nm

Spinel-type structured Li4+xTi5O12 (0 6 x 6 3 ) is actually one of the most promising anode materials for Li ion batteries. In its nanostructured form it is already used in some commercially available Li ion batteries. As was recently shown by our group (Wilkening et al., Phys. Chem. Chem. Phys. 9 (2007) 1239), Li diffusivity in microcrystalline Li4+xTi5O12 with x = 0 is rather slow. In the present contribution the Li conductivity in nanocrystalline samples of the electronic insulator Li4Ti5O12 prepared by different routes is investigated using impedance spectroscopy. The mean crystallite size of the samples is about 20 nm. The ionic conductivity of nanocrystalline Li4Ti5O12 obtained by mechanical treatment is higher by about two orders of magnitude compared to that found for a material which was prepared following a sol-gel method. The latter resembles the behaviour of the microcrystalline sample with an average particle size in the μm range rather than that of a nanocrystalline ball milled one with a mean crystallite size of about than 20 nm. The larger conductivity of the ball milled sample is ascribed to a much higher defect density generated when the particle size is reduced mechanically.

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Monodisperse CoSb nanocrystals as high-performance anode material for Li-ion batteries

Chemical Communications ◽

10.1039/d0cc06222g ◽

2020 ◽

Vol 56 (89) ◽

pp. 13872-13875

Author(s):

Shutao Wang ◽

Meng He ◽

Marc Walter ◽

Kostiantyn V. Kravchyk ◽

Maksym V. Kovalenko

Keyword(s):

Anode Material ◽

Current Density ◽

High Performance ◽

Storage Capacity ◽

Li Ion Batteries ◽

Ion Storage ◽

Li Ion ◽

20 Nm ◽

A Current

20 nm CoSb NCs delivered a high initial Li-ion storage capacity of 544 mA h g−1 at a current density of 660 mA g−1, and at least 82% of this capacity was retained after 1000 cycles.

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Mesoporous In2O3 nanofibers assembled by ultrafine nanoparticles as a high capacity anode for Li-ion batteries

RSC Advances ◽

10.1039/c6ra07804d ◽

2016 ◽

Vol 6 (55) ◽

pp. 49782-49786 ◽

Cited By ~ 10

Author(s):

Yong Zhang ◽

Chunhai Jiang ◽

Shuxin Zhuang ◽

Mi Lu ◽

Yongcan Cai

Keyword(s):

Large Volume ◽

High Capacity ◽

Li Ion Batteries ◽

Initial Discharge Capacity ◽

Storage Material ◽

Lithium Storage ◽

Initial Discharge ◽

Capacity Degradation ◽

Li Ion ◽

Large Volume Change

As a lithium storage material, In2O3 has been hindered by its rapid capacity degradation due to the large volume change during the repeated lithiation and delithiation process, although an initial discharge capacity of more than 1600 mA h g−1.

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Sol–gel derived nano-crystalline CaSnO3 as high capacity anode material for Li-ion batteries

Electrochemistry Communications ◽

10.1016/s1388-2481(02)00495-2 ◽

2002 ◽

Vol 4 (12) ◽

pp. 947-952 ◽

Cited By ~ 97

Author(s):

N. Sharma ◽

K.M. Shaju ◽

G.V. Subba Rao ◽

B.V.R. Chowdari

Keyword(s):

Anode Material ◽

Sol Gel ◽

High Capacity ◽

Li Ion Batteries ◽

Nano Crystalline ◽

Li Ion

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Effect of Synthesis Temperature on Structure and Electrochemical Performance of Spinel-Layered Li1.33MnTiO4+z in Li-Ion Batteries

Energies ◽

10.3390/en13112962 ◽

2020 ◽

Vol 13 (11) ◽

pp. 2962

Author(s):

Ngoc Hung Vu ◽

Van-Duong Dao ◽

Ha Tran Huu ◽

Won Bin Im

Keyword(s):

Electrochemical Performance ◽

Low Cost ◽

Sol Gel ◽

High Capacity ◽

Synthesis Temperature ◽

Impurity Phase ◽

Temperature Structure ◽

Li Ion Batteries ◽

Li Ion ◽

Sol Gel Synthesis

Herein, the spinel-layered cathode material Li1.33MnTiO4+z (0.8LiMnTiO4•0.2Li2Mn0.5Ti0.5O3) is investigated for the purpose of developing a high-capacity, low-cost, and environmentally friendly cathode for Li-ion batteries. Sol-gel synthesis is conducted and the relationships between synthesis temperature, structure, and electrochemical performance of the cathodes are studied. The effects of size and purity on the capacities of these cathodes are discussed. The samples fired at 500 and 600 °C contain an impurity phase of TiO2, thus delivering capacities of 208 and 210 mAh g−1 at C/10, respectively. The sample fired at 700 °C without the impurity phase of TiO2 shows a high capacity of 222 mAh g−1 at C/10 and capacity retention of 90.5% after 100 cycles at 1C.

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