scholarly journals Effect of PVP Coating on LiMnBO3 Cathodes for Li-Ion Batteries

Materials ◽  
2020 ◽  
Vol 13 (23) ◽  
pp. 5528
Author(s):  
Bolong Hong ◽  
Xiangming He ◽  
Huihua Yi ◽  
Chenglin Hu
Keyword(s):  
High Capacity ◽  
Lithium Ion ◽  
Particle Growth ◽  
Li Ion Batteries ◽  
Ion Diffusion ◽  
Solid State Method ◽  
Structure Morphology ◽  
Carbon Additives ◽  
Li Ion ◽  
Lithium Ion Diffusion

LiMnBO3 is a potential cathode for Li-ion batteries, but it suffers from a low electrochemical activity. To improve the electrochemical performance of LiMnBO3, the effect of polyvinyl pyrrolidone (PVP) as carbon additive was studied. Monoclinic LiMnBO3/C and LiMnBO3-MnO/C materials were obtained by a solid-state method at 500 °C. The structure, morphology and electrochemical behavior of these materials are characterized and compared. The results show that carbon additives and ball-milling dispersants affect the formation of impurities in the final products, but MnO is beneficial for the performance of LiMnBO3. The sample of LiMnBO3-MnO/C delivered a high capacity of 162.1 mAh g−1 because the synergistic effect of the MnO/C composite and the suppression of the PVP coating on particle growth facilitates charge transfer and 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

SnSb/TiO2/C nanocomposite fabricated by high energy ball milling for high-performance lithium-ion batteries

RSC Advances ◽  
2016 ◽  
Vol 6 (39) ◽  
pp. 32462-32466 ◽  
Author(s):  
Haihua Zhao ◽  
Wen Qi ◽  
Xuan Li ◽  
Hong Zeng ◽  
Ying Wu ◽  
...  
Keyword(s):  
Lithium Ion Batteries ◽  
Ball Milling ◽  
High Performance ◽  
High Capacity ◽  
Lithium Ion ◽  
High Energy ◽  
High Energy Ball Milling ◽  
Li Ion Batteries ◽  
Energy Ball ◽  
Li Ion

Alloy anodes for Li-ion batteries (LIBs) have attracted great interest due to their high capacity.

Sulfurization synthesis of a new anode material for Li-ion batteries: understanding the role of sulfurization in lithium ion conversion reactions and promoting lithium storage performance

2019 ◽  
Vol 7 (37) ◽  
pp. 21270-21279 ◽  
Author(s):  
Yanmin Qin ◽  
Zhongqing Jiang ◽  
Liping Guo ◽  
Jianlin Huang ◽  
Zhong-Jie Jiang ◽  
...  
Keyword(s):  
Anode Material ◽  
High Capacity ◽  
Lithium Ion ◽  
Li Ion Batteries ◽  
Lithium Storage ◽  
Storage Performance ◽  
Carbon Coated ◽  
Li Ion ◽  
Good Cycling Stability

N, S co-doped carbon coated MnOS (MnOS@NSC) has been demonstrated to be a potential anode material for LIBs with high capacity, good cycling stability and excellent rate performance.

The Effect of Sintering Temperature on Electronic Conductivity of LiFeGdPO4/C as a Lithium-Ion Battery Cathode

2021 ◽  
Vol 1028 ◽  
pp. 138-143
Author(s):  
Iman Rahayu ◽  
Anggi Suprabawati ◽  
Vina M. Puspitasari ◽  
Sahrul Hidayat ◽  
Atiek Rostika Noviyanti
Keyword(s):  
Lithium Ion Battery ◽  
Reduction Method ◽  
Sintering Temperature ◽  
Electronic Conductivity ◽  
Lithium Ion ◽  
Particle Growth ◽  
Ion Diffusion ◽  
A Value ◽  
High Theoretical Capacity ◽  
Lithium Ion Diffusion

Lithium ion batteries with LiFePO4 cathode have become the focus of research because they are eco-friendly, stable, high average voltage (3.5 V), and high theoretical capacity (170 mAh/g). However, LiFePO4 has disadvantages such as low electrical conductivity (~10-9 S/cm) and low lithium ion diffusion coefficient (~10-14-10-15 cm2/s) that can inhibit its application as a lithium ion battery cathode material. To increase the electronic conductivity of LiFePO4, it can be done by adding carbon as a coating material, then doping gadolinium metal ions because it has a radius similar to Fe, and increasing sintering temperature. Optimizing the sintering temperature can control particle growth and research was study the sintering temperature of the electronic conductivity of LiFeGdPO4/C and obtain the optimum sintering temperature at LiFeGdPO4/C. The carbothermal reduction method used in synthesis, with a variation of sintering temperature of 800°C, 830°C, 850°C, 870°C, and 900°C using reagents LiH2PO4, Fe2O3, Gd2O3, and carbon black. Furthermore the samples were characterized using XRD, SEM-EDS, and four-point probes. The results of the study were expected to increase the conductivity of LiFePO4. The results show the effect of sintering temperature can increase the electronic conductivity of LiFeGdPO4/C. Samples with a sintering temperature 850°C have the highest conductivity among all temperature variations with a value of 1.11 × 10-5 S cm-1.

High capacity MoO3/rGO nanocomposite anode for lithium ion batteries: an intuition into the conversion mechanism of MoO3

2018 ◽  
Vol 42 (23) ◽  
pp. 18569-18577 ◽  
Author(s):  
Shivaraj B. Patil ◽  
Udayabhanu Udayabhanu ◽  
Brij Kishore ◽  
G. Nagaraju ◽  
Jairton Dupont
Keyword(s):  
Lithium Ion Batteries ◽  
Anode Materials ◽  
High Capacity ◽  
Lithium Ion ◽  
Li Ion Batteries ◽  
Li Ion

rGO wrapped MoO3 NPs were successfully synthesized via simple and scalable steps as potential anode materials for Li-ion batteries.

The binder-free Ca2Ge7O16 nanosheet/carbon nanotube composite as a high-capacity anode for Li-ion batteries with long cycling life

RSC Advances ◽  
2016 ◽  
Vol 6 (108) ◽  
pp. 107040-107048 ◽  
Author(s):  
Xusong Liu ◽  
Xiaoxuan Ma ◽  
Jing Wang ◽  
Xiaoxu Liu ◽  
Caixia Chi ◽  
...  
Keyword(s):  
Carbon Nanotube ◽  
Lithium Ion Batteries ◽  
High Capacity ◽  
Lithium Ion ◽  
Li Ion Batteries ◽  
Ni Foam ◽  
Binder Free ◽  
Li Ion ◽  
Carbon Nanotube Composite ◽  
Cycling Life

Ca2Ge7O16 NS/CNT composites on Ni foam have been successfully fabricated for long cycling lithium-ion batteries.

scholarly journals Sustainable polysaccharide-derived mesoporous carbons (Starbon®) as additives in lithium-ion batteries negative electrodes

2017 ◽  
Vol 5 (46) ◽  
pp. 24380-24387 ◽  
Author(s):  
Sanghoon Kim ◽  
Angel Manuel Escamilla-Pérez ◽  
Mario De bruyn ◽  
Johan G. Alauzun ◽  
Nicolas Louvain ◽  
...  
Keyword(s):  
Lithium Ion Batteries ◽  
Lithium Ion ◽  
Mesoporous Carbons ◽  
Li Ion Batteries ◽  
Negative Electrodes ◽  
Carbon Additives ◽  
Li Ion

Mesoporous Starbon® was shown to surpass conventional carbon additives in Li-ion batteries negative electrodes.

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 Spatially Resolved Operando Synchrotron-Based X-Ray Diffraction Measurements of Ni-Rich Cathodes for Li-Ion Batteries

2022 ◽  
Vol 3 ◽  
Author(s):  
Andrew Stephen Leach ◽  
Alice V. Llewellyn ◽  
Chao Xu ◽  
Chun Tan ◽  
Thomas M. M. Heenan ◽  
...  
Keyword(s):  
High Capacity ◽  
Lithium Ion ◽  
Lower Percentage ◽  
Li Ion Batteries ◽  
X Ray Diffraction ◽  
X Ray ◽  
Spatially Resolved ◽  
Electrochemical Cycling ◽  
Li Ion

Understanding the performance of commercially relevant cathode materials for lithium-ion (Li-ion) batteries is vital to realize the potential of high-capacity materials for automotive applications. Of particular interest is the spatial variation of crystallographic behavior across (what can be) highly inhomogeneous electrodes. In this work, a high-resolution X-ray diffraction technique was used to obtain operando transmission measurements of Li-ion pouch cells to measure the spatial variances in the cell during electrochemical cycling. Through spatially resolved investigations of the crystallographic structures, the distribution of states of charge has been elucidated. A larger portion of the charging is accounted for by the central parts, with the edges and corners delithiating to a lesser extent for a given average electrode voltage. The cells were cycled to different upper cutoff voltages (4.2 and 4.3 V vs. graphite) and C-rates (0.5, 1, and 3C) to study the effect on the structure of the NMC811 cathode. By combining this rapid data collection method with a detailed Rietveld refinement of degraded NMC811, the spatial dependence of the degradation caused by long-term cycling (900 cycles) has also been shown. The variance shown in the pristine measurements is exaggerated in the aged cells with the edges and corners offering an even lower percentage of the charge. Measurements collected at the very edge of the cell have also highlighted the importance of electrode alignment, with a misalignment of less than 0.5 mm leading to significantly reduced electrochemical activity in that area.

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