Li Storage of Calcium Niobates for Lithium Ion Batteries

2015 ◽  
Vol 15 (10) ◽  
pp. 8103-8107
Author(s):  
Haena Yim ◽  
Seung-Ho Yu ◽  
So Yeon Yoo ◽  
Yung-Eun Sung ◽  
Ji-Won Choi
Keyword(s):  
Thin Film ◽  
Lithium Ion Batteries ◽  
Discharge Capacity ◽  
Coulombic Efficiency ◽  
Negative Electrode ◽  
Lithium Ion ◽  
Potassium Cation ◽  
Layered Perovskite ◽  
Perovskite Layer ◽  
Negative Material

New types of niobates negative electrode were studied for using in lithium-ion batteries in order to alternate metallic lithium anodes. The potassium intercalated compound KCa2Nb3O10 and proton intercalated compound HCa2Nb3O10 were studied, and the electrochemical results showed a reversible cyclic voltammetry profile with acceptable discharge capacity. The as-prepared KCa2Nb3O10 negative electrode had a low discharge capacity caused by high overpotential, but the reversible intercalation and deintercalation reaction of lithium ions was activated after exchanging H+ ions for intercalated K+ ions. The initial discharge capacity of HCa2Nb3O10 was 54.2 mAh/g with 92.1% of coulombic efficiency, compared with 10.4 mAh/g with 70.2% of coulombic efficiency for KCa2Nb3O10 at 1 C rate. The improved electrochemical performance of the HCa2Nb3O10 was related to the lower bonding energy between proton cation and perovskite layer, which facilitate Li+ ions intercalating into the cation site, unlike potassium cation and perovskite layer. Also, this negative material can be easily exfoliated to Ca2Nb3O10 layer by using cation exchange process. Then, obtained two-dimensional nanosheets layer, which recently expected to be an advanced electrode material because of its flexibility, chemical stable, and thin film fabricable, can allow Li+ ions to diffuse between the each perovskite layer. Therefore, this new type layered perovskite niobates can be used not only bulk-type lithium ion batteries but also thin film batteries as a negative material.

NANOSTRUCTURED SnO2/C COMPOSITE ANODES IN LITHIUM-ION BATTERIES

2003 ◽  
Vol 02 (04n05) ◽  
pp. 299-306 ◽  
Author(s):  
CHIEN-TE HSIEH ◽  
JIN-MING CHEN ◽  
HSIU-WEN HUANG
Keyword(s):  
Lithium Ion Batteries ◽  
Discharge Capacity ◽  
Coulombic Efficiency ◽  
Sol Gel ◽  
Lithium Ion ◽  
Surface Characteristics ◽  
Carbon Surface ◽  
Cyclic Voltammograms ◽  
Composite Anodes ◽  
Sol Gel Synthesis

Nanostructured SnO 2/ C composites used as anode materials were prepared by sol–gel synthesis to explore electrochemical properties in lithium-ion batteries. Surface characteristics of the SnO 2/ C nanocomposite were analyzed by X-ray diffraction (XRD) and transmission electron microscopy (TEM). It was found that nanocrystalline SnO 2/ C with a grain size of 20–50 nm was uniformly dispersed on the carbon surface. After nanocrytalline SnO 2 coated onto carbon, the discharge capacity showed an increase up to 23%, i.e., from 300 to 370 mAh/g at a current density of 0.6 mA/cm2. The nanocomposite anode can achieve a fairly stable discharge capacity and excellent Coulombic efficiency (>99.5%) over 50 cycles. Cyclic voltammograms indicated that the improvements on capacity and cycleability were due to reversible alloying of nanosized Sn and Li on carbon surface.

scholarly journals Erratum to: “Thin film negative electrode based on silicon composite for lithium-ion batteries”

2017 ◽  
Vol 46 (4) ◽  
pp. 297-297
Author(s):  
A. A. Airapetov ◽  
S. V. Vasiliev ◽  
T. L. Kulova ◽  
M. E. Lebedev ◽  
A. V. Metlitskaya ◽  
...  
Keyword(s):  
Thin Film ◽  
Lithium Ion Batteries ◽  
Negative Electrode ◽  
Lithium Ion

Thin film negative electrode based on silicon composite for lithium-ion batteries

2016 ◽  
Vol 45 (4) ◽  
pp. 285-291
Author(s):  
A. A. Airapetov ◽  
S. V. Vasiliev ◽  
T. L. Kulova ◽  
M. E. Lebedev ◽  
A. V. Metlitskaya ◽  
...  
Keyword(s):  
Thin Film ◽  
Lithium Ion Batteries ◽  
Negative Electrode ◽  
Lithium Ion

scholarly journals Micron-Sized Monodisperse Particle LiNi0.6Co0.2Mn0.2O2 Derived by Oxalate Solvothermal Process Combined with Calcination as Cathode Material for Lithium-Ion Batteries

Materials ◽  
2021 ◽  
Vol 14 (10) ◽  
pp. 2576
Author(s):  
Zhuo Chen ◽  
Fangya Guo ◽  
Youxiang Zhang
Keyword(s):  
Lithium Ion Batteries ◽  
Discharge Capacity ◽  
Coulombic Efficiency ◽  
Lithium Ion ◽  
High Energy ◽  
High Energy Density ◽  
Commercial Application ◽  
Side Reactions ◽  
Monodisperse Particles ◽  
Voltage Range

Ni-rich cathode LiNixCoyMn1-x-yO2 (NCM, x ≥ 0.5) materials are promising cathodes for lithium-ion batteries due to their high energy density and low cost. However, several issues, such as their complex preparation and electrochemical instability have hindered their commercial application. Herein, a simple solvothermal method combined with calcination was employed to synthesize LiNi0.6Co0.2Mn0.2O2 with micron-sized monodisperse particles, and the influence of the sintering temperature on the structures, morphologies, and electrochemical properties was investigated. The material sintered at 800 °C formed micron-sized particles with monodisperse characteristics, and a well-order layered structure. When charged–discharged in the voltage range of 2.8–4.3 V, it delivered an initial discharge capacity of 175.5 mAh g−1 with a Coulombic efficiency of 80.3% at 0.1 C, and a superior discharge capacity of 135.4 mAh g−1 with a capacity retention of 84.4% after 100 cycles at 1 C. The reliable electrochemical performance is probably attributable to the micron-sized monodisperse particles, which ensured stable crystal structure and fewer side reactions. This work is expected to provide a facile approach to preparing monodisperse particles of different scales, and improve the performance of Ni-rich NCM or other cathode materials for lithium-ion batteries.

scholarly journals NbO2 as a Noble Zero-Strain Material for Li-Ion Batteries: Electrochemical Redox Behavior in a Nonaqueous Solution

Energies ◽  
2019 ◽  
Vol 12 (15) ◽  
pp. 2960 ◽  
Author(s):  
Yang-Soo Kim ◽  
Yonghoon Cho ◽  
Paul M. Nogales ◽  
Soon-Ki Jeong
Keyword(s):  
Lithium Ion Batteries ◽  
Coulombic Efficiency ◽  
Active Material ◽  
Negative Electrode ◽  
Lithium Ion ◽  
Cycling Performance ◽  
Nonaqueous Solution ◽  
Constant Current ◽  
Lithium Ions ◽  
Rutile Structure

Lithium-ion batteries are widely available commercially and attempts to extend the lifetime of these batteries remain necessary. The energy storage characteristics of NbO2 with a rutile structure as a material for the negative electrode of lithium-ion batteries were investigated. When negative potential was applied to the NbO2 electrode during application of a constant current in a nonaqueous solution containing lithium ions, these ions were inserted into the NbO2. Conversely, upon application of positive potential, the inserted lithium ions were extracted from the NbO2. In situ X-ray diffraction results revealed that the variation in the volume of NbO2 accompanying the insertion and extraction of lithium was 0.14%, suggesting that NbO2 is a zero-strain (usually defined by a volume change ratio of 1% or less) active material for lithium-ion batteries. Moreover, the highly stable structure of NbO2 allows the corresponding electrode to exhibit excellent cycling performance and coulombic efficiency.

scholarly journals Cu&Si Core–Shell Nanowire Thin Film as High-Performance Anode Materials for Lithium Ion Batteries

2021 ◽  
Vol 11 (10) ◽  
pp. 4521
Author(s):  
Lifeng Zhang ◽  
Linchao Zhang ◽  
Zhuoming Xie ◽  
Junfeng Yang
Keyword(s):  
Lithium Ion Batteries ◽  
Discharge Capacity ◽  
Anode Materials ◽  
High Performance ◽  
Coulombic Efficiency ◽  
Three Dimensional ◽  
Lithium Ion ◽  
Core Shell ◽  
Si Nanowires ◽  
Cu Nanowires

Cu@Si core–shell nanowire thin films with a Cu3Si interface between the Cu and Si were synthesized by slurry casting and subsequent magnetron sputtering and investigated as anode materials for lithium ion batteries. In this constructed core–shell architecture, the Cu nanowires were connected to each other or to the Cu foil, forming a three-dimensional electron-conductive network and as mechanical support for the Si during cycling. Meanwhile, the Cu3Si layer can enhance the interface adhesion strength of the Cu core and Si shell; a large amount of void spaces between the Cu@Si nanowires could accommodate the lithiation-induced volume expansion and facilitate electrolyte impregnation. As a consequence, this electrode exhibits impressive electrochemical properties: the initial discharge capacity and initial coulombic efficiency is 3193 mAh/g and 87%, respectively. After 500 cycles, the discharge capacity is about 948 mAh/g, three times that of graphite, corresponding to an average capacity fading rate of 0.2% per cycle.

Improved coulombic efficiency in nanocomposite thin film based on electrodeposited-oxidized FeNi-electrodes for lithium-ion batteries

2013 ◽  
Vol 557 ◽  
pp. 82-90 ◽  
Author(s):  
María C. López ◽  
Gregorio F. Ortiz ◽  
Pedro Lavela ◽  
Ricardo Alcántara ◽  
José L. Tirado
Keyword(s):  
Thin Film ◽  
Lithium Ion Batteries ◽  
Coulombic Efficiency ◽  
Lithium Ion ◽  
Nanocomposite Thin Film
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