scholarly journals Heterogeneous synthesis and electrochemical performance of LiMnPO4/C composites as cathode materials of lithium ion batteries

RSC Advances ◽  
2020 ◽  
Vol 10 (66) ◽  
pp. 39981-39987
Author(s):  
Ju-Gong Zheng ◽  
Guang-Yuan Ren ◽  
Jun Shi ◽  
Ting Yang ◽  
Yue-Feng Tang ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Electrochemical Performance ◽  
Lithium Ion Batteries ◽  
Phytic Acid ◽  
Heterogeneous Nucleation ◽  
Cathode Materials ◽  
Lithium Ion ◽  
Phosphorus Source

A heterogeneous nucleation technique was used to prepare LiMnPO4/C. The walls of carbon nanotubes were employed as nucleation interfaces and phytic acid as an eco-friendly phosphorus source. The product exhibits superior electrochemical performance.

Concentration-Controlled and Phytic Acid-Assisted Synthesis of Self-Assembled LiFePO4 as Cathode Materials for Lithium-Ion Battery

NANO ◽  
2020 ◽  
Vol 15 (01) ◽  
pp. 2050003
Author(s):  
Yin Li ◽  
Keyu Zhang ◽  
Zhengjie Chen ◽  
Yunke Wang ◽  
Li Wang ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Diffusion Coefficient ◽  
Electrochemical Performance ◽  
Phytic Acid ◽  
Cathode Materials ◽  
Electrochemical Impedance ◽  
Lithium Ion ◽  
Precursor Concentration ◽  
Phosphorus Source ◽  
Self Assembled

The olivine LiFePO4 with various morphologies and different growth lattice planes was prepared by a controllable hydrothermal method with changing precursor concentration and using phytic acid as phosphorus source. The microstructure, crystal orientation and electrochemical performance of the prepared samples were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), high-resolution transmission electron microscopy (HR-TEM) and charge–discharge tests. The results show that the morphologies of all samples change from spindle-like to hierarchical plate-like and then to long plate-like shape, and the main exposed facets transform from (100) to (001). This indicates that the precursor concentration and phytic acid play important roles in exposing facets and controlling the morphology of LiFePO4. In order to illustrate these phenomena, a reasonable assembly process is provided and the formation is explained. Li ion diffusion coefficient along [100] and [001] directions was calculated by using electrochemical impedance spectroscopy (EIS). The results show that the diffusion coefficient of (100) facet is higher than that of (001) facet, indicating a good electrochemical performance for (100) facet. In addition, the capacity test is carried out, which also confirms the above results. With the precursor concentration of 0.5[Formula: see text]M, the obtained LiFePO4 with self-assembled hierarchical structure, smaller size and (100) facet shows the best electrochemical performance: 162.1[Formula: see text]mAh/g at 0.1[Formula: see text]C and 112.4[Formula: see text]mAh/g at 10[Formula: see text]C. Using phytic acid as phosphorus source and controlling precursor concentration to prepare high performance LiFePO4 open up a new prospect for the production of cathode materials for lithium ion batteries.

Spray-drying synthesized LiNi0.6Co0.2Mn0.2O2 and its electrochemical performance as cathode materials for lithium ion batteries

2011 ◽  
Vol 214 (3) ◽  
pp. 279-282 ◽  
Author(s):  
Peng Yue ◽  
Zhixing Wang ◽  
Wenjie Peng ◽  
Lingjun Li ◽  
Wei Chen ◽  
...  
Keyword(s):  
Electrochemical Performance ◽  
Lithium Ion Batteries ◽  
Spray Drying ◽  
Cathode Materials ◽  
Lithium Ion

Template-free formation of various V2O5 hierarchical structures as cathode materials for lithium-ion batteries

2017 ◽  
Vol 5 (14) ◽  
pp. 6522-6531 ◽  
Author(s):  
Yining Ma ◽  
Aibin Huang ◽  
Huaijuan Zhou ◽  
Shidong Ji ◽  
Shuming Zhang ◽  
...  
Keyword(s):  
Electrochemical Performance ◽  
Lithium Ion Batteries ◽  
Cathode Materials ◽  
Hierarchical Structures ◽  
Lithium Ion ◽  
Excellent Electrochemical Performance ◽  
Template Free

Various V2O5 hierarchical structures were successfully synthesized via a template-free method and exhibited excellent electrochemical performance.

Improving the electrochemical properties of LiNi0.5Co0.2Mn0.3O2 at 4.6 V cutoff potential by surface coating with Li2TiO3 for lithium-ion batteries

2015 ◽  
Vol 17 (47) ◽  
pp. 32033-32043 ◽  
Author(s):  
Jing Wang ◽  
Yangyang Yu ◽  
Bing Li ◽  
Tao Fu ◽  
Dongquan Xie ◽  
...  
Keyword(s):  
Electrochemical Performance ◽  
Electrochemical Properties ◽  
Lithium Ion Batteries ◽  
Cathode Materials ◽  
Surface Coating ◽  
Lithium Ion ◽  
Coprecipitation Method

The Li2TiO3-coated LiNi0.5Co0.2Mn0.3O2 (LTO@NCM) cathode materials are synthesized via an in situ coprecipitation method to improve the electrochemical performance of NCM.

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