Characteristic of novel composition Nax[Ni0.6Co0.2Mn0.2]O2 as Cathode Materials for So-dium Ion-Batteries

2017 ◽  
Vol 20 (1) ◽  
pp. 021-024 ◽  
Author(s):  
Byeong-Chan Jang ◽  
Ji-Woong Shin ◽  
Jin-Joo Bae ◽  
Jong-Tae Son
Keyword(s):  
Cathode Material ◽  
Calcination Temperature ◽  
Cathode Materials ◽  
Cycling Performance ◽  
Sodium Content ◽  
High Discharge ◽  
High Discharge Capacity ◽  
Layered Cathode Materials ◽  
Co Precipitation

In this work, novel composition of Nax[Ni0.6Co0.2Mn0.2]O2 (x = 0.5 and 1.0) layered cathode materials were synthesized by using hydroxide co-precipitation and calcined at 850, 900 and 950 °C. We studied the effects of different sodium contents and calcination temperature on the structural and electrochemical properties of this novel cathode material. The change of calcination temperature and sodium content led to different P2-type, P2/P3-type, P2/O3-type, or O3-type structures. The results indicate better electrochemical perfor-mance of the P2-type cathode materials in terms of high discharge capacity and good cycling performance, when compared to P2/P3, P2/O3, and O3-type cathode materials. Na0.5[Ni0.6Co0.2Mn0.2]O2 electrode calcined at 900 °C exhibited a good capacity of 107.15 mAhg-1 and ca-pacity retention over 73 % after 20 cycle. Characterization of this material will help to develop cathode materials for the Na-ion battery cathode.

Molybdate flux growth of idiomorphic Li(Ni1/3Co1/3Mn1/3)O2 single crystals and characterization of their capabilities as cathode materials for lithium-ion batteries

2016 ◽  
Vol 4 (19) ◽  
pp. 7289-7296 ◽  
Author(s):  
T. Kimijima ◽  
N. Zettsu ◽  
K. Yubuta ◽  
K. Hirata ◽  
K. Kami ◽  
...  
Keyword(s):  
Lithium Ion Batteries ◽  
Single Crystals ◽  
Discharge Capacity ◽  
Cathode Materials ◽  
Lithium Ion ◽  
Flux Growth ◽  
High Discharge ◽  
High Discharge Capacity ◽  
Highly Dispersed

Highly dispersed primary Li(Ni1/3Co1/3Mn1/3)O2 crystals, which showed high discharge capacity at a high C-rate, were grown from a Li2MoO4 flux.

scholarly journals On the Sensitivity of the Ni-rich Layered Cathode Materials for Li-ion Batteries to the Different Calcination Conditions

Nanomaterials ◽  
2020 ◽  
Vol 10 (10) ◽  
pp. 2018
Author(s):  
Hubert Ronduda ◽  
Magdalena Zybert ◽  
Anna Szczęsna-Chrzan ◽  
Tomasz Trzeciak ◽  
Andrzej Ostrowski ◽  
...  
Keyword(s):  
Calcination Temperature ◽  
Cathode Materials ◽  
Nickel Content ◽  
Particle Growth ◽  
Electrochemical Performances ◽  
Layered Oxides ◽  
Calcination Temperatures ◽  
Layered Cathode Materials ◽  
Li Ion ◽  
Selection Of

Ni-rich layered oxides, i.e., LiNi0.6Mn0.2Co0.2O2 (NMC622) and LiNiO2 (LNO), were prepared using the two-step calcination procedure. The samples obtained at different calcination temperatures (750–950 °C for the NMC622 and 650–850 °C for the LNO cathode materials) were characterized using nitrogen physisorption, PXRD, SEM and DLS methods. The correlation of the calcination temperature, structural properties and electrochemical performance of the studied Ni-rich layered cathode materials was thoroughly investigated and discussed. It was determined that the optimal calcination temperature is dependent on the chemical composition of the cathode materials. With increasing nickel content, the optimal calcination temperature shifts towards lower temperatures. The NMC-900 calcined at 900 °C and the LNO-700 calcined at 700 °C showed the most favorable electrochemical performances. Despite their well-ordered structure, the materials calcined at higher temperatures were characterized by a stronger sintering effect, adverse particle growth, and higher Ni2+/Li+ cation mixing, thus deteriorating their electrochemical properties. The importance of a careful selection of the heat treatment (calcination) temperature for each individual cathode material was emphasized.

Surface Treatment of the Lithium Boron Oxide Coated LiMn2O4 Cathode Material in Li-Ion Battery

2007 ◽  
Vol 280-283 ◽  
pp. 671-676 ◽  
Author(s):  
Hong Wei Chan ◽  
Jenq Gong Duh ◽  
Shyang Roeng Sheen
Keyword(s):  
Particle Size ◽  
Cathode Material ◽  
Discharge Capacity ◽  
Average Particle Size ◽  
Lithium Ion ◽  
Cyclic Test ◽  
Average Particle ◽  
Laser Scattering ◽  
High Discharge ◽  
High Discharge Capacity

Surface modification on the electrode has a vital impact on lithium-ion batteries, and it is essential to probe the mechanism of the modified film on the surface of the electrode. In this study, a Li2O-2B2O3 film was coated on the surface of the cathode material by solution method. The cathode powders derived from co-precipitation method were calcined with various weight percent of the surface modified glass to form fine powder of single spinel phase with different particle size, size distribution and morphology. The thermogravimetry/differential thermal analysis was used to evaluate the appropriate heat treatment temperature. The structure was confirmed by the X-ray diffractometer along with the composition measured by the electron probe microanalyzer. From the field emission scanning electron microscope image and Laser Scattering measurements, the average particle size was in the range of 7-8µm. The electrochemical behavior of the cathode powder was examined by using two-electrode test cells consisted of a cathode, metallic lithium anode, and an electrolyte of 1M LiPF6. Cyclic charge/discharge testing of the coin cells, fabricated by both coated and un-coated cathode material, provided high discharge capacity. Furthermore, the coated cathode powder showed better cyclability than the un-coated one after the cyclic test. The introduction of the glass-coated cathode material revealed high discharge capacity and appreciably decreased the decay rate after cyclic test.

Well-Designed Spherical Morphology Li1.2Mn0.54Ni0.13Co0.13O2 as Superior Cathode Materials for Lithium-Ion Batteries

2016 ◽  
Vol 852 ◽  
pp. 853-857
Author(s):  
Shao Meng Ma ◽  
Xian Hua Hou ◽  
Yan Ling Huang ◽  
Xiao Li Zou ◽  
She Jun Hu
Keyword(s):  
Cathode Material ◽  
Cathode Materials ◽  
Performance Test ◽  
Coulombic Efficiency ◽  
Lithium Ion ◽  
Constant Current ◽  
Precipitation Method ◽  
One Pot ◽  
Constant Current Density ◽  
High Discharge Capacity

Li-rich layered cathode materials with an average composition of Li1.2Mn0.54Ni0.13Co0.13O2 have been successfully synthesized via one-pot facile co-precipitation method. The spherical cathode material and the unconsolidated shape one are obtained by optimizing the experimental condition. The results of electrochemical performance test expose that the spherical cathode material exhibits more excellent cycle ability and rate performance than the unconsolidated one. The initial charge-discharge specific capacities of the spherical cathode are approximately 323.4 mAh g-1 and 266.4 mAh g-1, respectively, showing an initial coulombic efficiency of 82.4%. A high discharge capacity of 241.1 mAh g-1 is maintained with the capacity retention of 90.5% after 50 cycles at a constant current density of 50 mA g-1 (1 C=250 mAh g-1).

Improving the cycling performance of LiFePO4 cathode material by poly(3,4-ethylenedioxythiopene) coating

RSC Advances ◽  
2014 ◽  
Vol 4 (50) ◽  
pp. 26108-26114 ◽  
Author(s):  
D. Cíntora-Juárez ◽  
C. Pérez-Vicente ◽  
Shahzada Ahmad ◽  
J. L. Tirado
Keyword(s):  
Cathode Material ◽  
Cathode Materials ◽  
Composite Cathode ◽  
Cycling Performance ◽  
Lifepo4 Cathode

LiFePO4 composite cathode materials with PEDOT [poly(3,4-ethylenedioxythiopene)] were prepared by electropolymerization or by blending methods.

Improved cycling properties of a Li-rich and Mn-based Li1.38Ni0.25Mn0.75O2.38 porous microspherical cathode material via micromorphological control

2020 ◽  
Vol 44 (30) ◽  
pp. 13074-13082
Author(s):  
Min Gao ◽  
Fengling Yun ◽  
Jinling Zhao ◽  
Wenjin Li ◽  
Fang Lian ◽  
...  
Keyword(s):  
Cathode Material ◽  
Discharge Rate ◽  
Cycling Performance ◽  
Side Reactions ◽  
Capacity Fading ◽  
High Discharge ◽  
High Discharge Rate ◽  
Primary Particles

The as-prepared LMNO-850 with 100–200 nm spherical-like shape primary particles exhibits superior cycling performance even at high discharge rate. The capacity fading in the first 50 cycles may be caused by interfacial side-reactions between electrode and electrolyte.

scholarly journals Flame Aerosol Synthesis and Electrochemical Characterization of Ni-Rich Layered Cathode Materials for Li-Ion Batteries

2019 ◽  
Vol 2 (2) ◽  
pp. 1319-1329 ◽  
Author(s):  
Christopher Abram ◽  
Jingning Shan ◽  
Xiaofang Yang ◽  
Chao Yan ◽  
Daniel Steingart ◽  
...  
Keyword(s):  
Cathode Materials ◽  
Electrochemical Characterization ◽  
Li Ion Batteries ◽  
Aerosol Synthesis ◽  
Layered Cathode Materials ◽  
Li Ion

scholarly journals Thermophysical Characterization of a Layered P2 Type Structure Na0.53MnO2 Cathode Material for Sodium Ion Batteries

Batteries ◽  
2021 ◽  
Vol 7 (1) ◽  
pp. 16
Author(s):  
Ijaz Ul Mohsin ◽  
Carlos Ziebert ◽  
Magnus Rohde ◽  
Hans Jürgen Seifert
Keyword(s):  
Thermal Diffusivity ◽  
Cathode Material ◽  
Specific Heat ◽  
Cathode Materials ◽  
Evolved Gas Analysis ◽  
Type Structure ◽  
Sodium Ion ◽  
Sodium Ion Batteries ◽  
Scanning Calorimetry

Over the last decade, the demand for safer batteries with excellent performance and lower costs has been intensively increasing. The abundantly available precursors and environmental friendliness are generating more and more interest in sodium ion batteries (SIBs), especially because of the lower material costs compared to Li-ion batteries. Therefore, significant efforts are being dedicated to investigating new cathode materials for SIBs. Since the thermal characterization of cathode materials is one of the key factors for designing safe batteries, the thermophysical properties of a commercial layered P2 type structure Na0.53MnO2 cathode material in powder form were measured in the temperature range between −20 and 1200 °C by differential scanning calorimetry (DSC), laser flash analysis (LFA), and thermogravimetry (TG). The thermogravimetry (TG) was combined with mass spectrometry (MS) to study the thermal decomposition of the cathode material with respect to the evolved gas analysis (EGA) and was performed from room temperature up to 1200 °C. The specific heat (Cp) and the thermal diffusivity (α) were measured up to 400 °C because beyond this temperature, the cathode material starts to decompose. The thermal conductivity (λ) as a function of temperature was calculated from the thermal diffusivity, the specific heat capacity, and the density. Such thermophysical data are highly relevant and important for thermal simulation studies, thermal management, and the mitigation of thermal runaway.

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