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.

An interfacial framework for breaking through the Li-ion transport barrier of Li-rich layered cathode materials

2017 ◽  
Vol 5 (46) ◽  
pp. 24292-24298 ◽  
Author(s):  
Yu Zheng ◽  
Lai Chen ◽  
Yuefeng Su ◽  
Jing Tan ◽  
Liying Bao ◽  
...  
Keyword(s):  
Ion Transport ◽  
Cathode Materials ◽  
Rate Capability ◽  
High Rate ◽  
Layered Crystal ◽  
High Rate Capability ◽  
Transport Barrier ◽  
Layered Cathode Materials ◽  
Li Ion

A spinel structured interfacial framework was derived within a host layered crystal, resulting in excellent high-rate capability of Li-rich materials.

Stabilizing Li-rich layered cathode materials by nanolayer-confined crystal growth for Li-ion batteries

2020 ◽  
Vol 333 ◽  
pp. 135466 ◽  
Author(s):  
Xiwei Lan ◽  
Yaqian Li ◽  
Songtao Guo ◽  
Le Yu ◽  
Yue Xin ◽  
...  
Keyword(s):  
Crystal Growth ◽  
Cathode Materials ◽  
Li Ion Batteries ◽  
Layered Cathode Materials ◽  
Li Ion

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.

FACILE SOL–GEL SYNTHESIS OF Li[Li0.2Mn0.56Ni0.16Co0.08]O2 AS IMPROVED CATHODE MATERIAL FOR LITHIUM-ION BATTERIES

2013 ◽  
Vol 01 (04) ◽  
pp. 1340015
Author(s):  
WENJUAN HAO ◽  
HAN CHEN ◽  
YANHONG WANG ◽  
HANHUI ZHAN ◽  
QIANGQIANG TAN ◽  
...  
Keyword(s):  
Cathode Materials ◽  
Sol Gel ◽  
Specific Capacity ◽  
Lithium Ion ◽  
Electrochemical Performances ◽  
Acetate Tetrahydrate ◽  
Li Ion Batteries ◽  
Gel Method ◽  
Sol Gel Method ◽  
Li Ion

Li [ Li 0.2 Mn 0.56 Ni 0.16 Co 0.08] O 2 cathode materials for Li -ion batteries were synthesized by a facile sol–gel method followed by calcination at various temperatures (700°C, 800°C and 900°C). Lithium acetate dihydrate, manganese (II) acetate tetrahydrate, nickel (II) acetate tetrahydrate and cobalt (II) acetate tetrahydrate are employed as the metal precursors, and citric acid monohydrate as the chelating agent. For the obtained Li [ Li 0.2 Mn 0.56 Ni 0.16 Co 0.08] O 2 materials, the metal components existed in the form of Mn 4+, Ni 2+ and Co 3+, and their molar ratio was in good agreement with 0.56 : 0.16 : 0.08. The calcination temperature played an important role in the particle size, crystallinity and further electrochemical properties of the cathode materials. The Li [ Li 0.2 Mn 0.56 Ni 0.16 Co 0.08] O 2 material calcined at 800°C for 6 h showed the best electrochemical performances. Its discharge specific capacities cycled at 0.1 C, 0.5 C, 1 C and 2 C rates were 266.0 mAh g−1, 243.1 mAh g−1, 218.2 mAh g−1 and 192.9 mAh g−1, respectively. When recovered to 0.1 C rate, the discharge specific capacity was 260.2 mAh g−1 and the capacity loss is only 2.2%. This work demonstrates that the sol–gel method is a facile route to prepare high performance Li [ Li 0.2 Mn 0.56 Ni 0.16 Co 0.08] O 2 cathode materials for Li -ion batteries.

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