Abstract
Carbon plays a critical role in improving the electronic conductivity of cathodes in lithium ion batteries. Particularly, the characteristics of carbon and its composite with electrode material strongly affect battery properties, governed by electron as well as Li+ ion transport. We have reviewed here various types of carbon materials and organic carbon sources in the production of conductive composites of nano-LiMnPO4 and LiCoO2. Various processes of making these composites with carbon or organic carbon sources and their characterization have been reviewed. Finally, the type and amount of carbon and the preparation methods of composites are summarized along with their battery performances and cathode materials. Among the different processes of making a composite, ball milling provided the benefit of dense and homogeneous nanostructured composites, leading to higher tap-density and thus increasing the volumetric energy densities of cathodes.
Highlights
Nowadays, lithium ion batteries are expanding their market and are used in electric vehicles and large energy storage systems
This review focuses on efficient carbon coating methods in detail, physicochemical properties of of the composites and battery performances of LiMnPO4 and LiCoO2 cathodes prepared by different the composites and battery performances of LiMnPO4 and LiCoO2 cathodes prepared by different mixing/coating methods
This study showed that the practical discharge power density of LiMnPO4 is close to that of LiFePO4 when the charge rate is C/25 and the practical energy density of LiMnPO4 (630 Wh kg−1 ) is comparable to or even higher than that of LiFePO4 at lower power (
Summary
Lithium ion batteries are expanding their market and are used in electric vehicles and large energy storage systems. Because the active cathode material (LiMx Oy , M = transition metals) is often lacking electronic conductivity, conductive carbon is added with the help of a binder (Figure 1) [7,8,9,10,11,12,13,14,15,16] This carbon in a cathode does not involve the electrochemical reaction but solely supports the transport of electrons through the redox-active material. The binder (grey in Figure 1) holds the particles together and provides a good adhesion to the current collector [18,19] Among these components (redox material, carbon and binder) in the electrode, the composite made from the redox-active material and carbon is very important because it is directly related to the transport of electrons and lithium ions, responsible for the battery properties [20].
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
