A new and effective approach to 4.8 V cathode synthesis with superior electrochemical qualities for lithium-ion applications

作者：Ornek Ahmet^*

来源：Journal of Alloys and Compounds, 2017, 710: 809-818.

DOI：10.1016/j.jallcom.2017.03.319

• Li-ion
• Cathode material
• Lithium cobalt phosphate
• Microwave power
• Alginic acid

Nano-scale LiCoPO4/C cathode materials were produced by a recently detailed low-level and longtime microwave-hydrothermal method. This effective method offers some clear advantages: it improves crystal qualities and has a positive impact on the quality and properties of the carbon layer. In addition, for comparison purposes, three other routes were used: hydrothermal, sol-gel and simple precipitation techniques. Alginic acid compound was used as a provider of carbon because of its superior properties in terms of its ability to adhere to the surface. It is clearly known that, while capable of producing high voltage olivine, cathodes have two main drawbacks and these have not yet been overcome; these are insufficient cycle stability and low rate performance. At this point, in light of the accessed data, it provides a simple and useful solution to the problems mentioned above. In particular, HR-TEM analysis reveals that this extraordinary microwave technique makes it possible to extremely fine and homogeneous surface carbon layer, whin results in a striking impact on its electrochemical properties. Thus, this work provides a unique solution for a high-level energy storage application.

• 出版日期2017-7-5