Lithium slurry battery (LSB) is a capacity-type electrochemical energy storage technology with the attractive features of low cost, long life, high security and easy recycling. The lithium-storage particles of LSB are dispersed within the 3-dimensional conductive network of the slurry rather than being fixed and bonded in the electrode as prepared in traditional lithium battery. This endues LSB the characteristics of thick electrode and being maintainable to get regeneration. There are some key scientific barriers which limit the application of LSB, including the interpretation of mixed electronic-ionic conductivity mechanisms under different slurry thicknesses and formulations, in order to get an optimized electrode slurry with low internal resistance as well as high energy and power density; the analysis of the electrochemical reaction mechanisms and microstructure evolutions of the surface of active particle and the interface between the slurry and the current collector, in order to decrease the contact resistance, stabilize the interface structure and reduce the polarization and capacity loss; the research of capacity fading mechanism to optimize the online maintenance and recovery methods, etc. In this paper, the working principles and characteristics of LSB, and the research progress on the key materials and mixed conductivity mechanism of electrode slurry, the interface of slurry and current collector for the design of thick electrode, and the regeneration and recycling of electrode slurry are introduced.
Contents
1 Introduction
2 Working principles and characteristics of lithium slurry battery
3 Key materials and mixed electronic-ionic conductivity mechanisms of electrode slurry
3.1 Key materials of the electrode slurry
3.2 Mixed electronic-ionic conductivity mechanisms of electrode slurry
4 Slurry-current collector interface and design of thick electrode
4.1 Characteristics of slurry-current collector interface
4.2 Design of thick electrode
5 Online maintenance and recycling of electrode slurry
5.1 Online maintenance of electrode slurry
5.2 Recycling of electrode slurry
6 Conclusion