Development of the Next Generation Anode Materials for Super-Efficient Lithium-Ion Batteries

Abstract

The global environmental and energy challenges demand for an immediate response through decarbonization of the energy sources by technological advances and implementation of renewable sources. From this point of view, the development of super-efficient battery technology has received an extensive attention for electrification of vehicles and grid integration of renewables [1]. Silicon materials have not only overwhelmed the electronics industry, but also can be nominated as a key technology towards achieving such super-efficiency in batteries due to its appealing features associated with the highest-known specific capacity (~4200 mAh g-1), profusion, and attractive cost. However, its promotion in the global market is impeded by low-conductive nature and high structural instability during cycling. The abovementioned restrictions can be surmounted through involvement of stable spinel Li4Ti5O12 (LTO) structure [2] and polyacrylonitrile (PAN) polymer conductive network [3] in the preparation of Si-based anode material with superior electrochemical properties. PAN is considered to be a carbon source with sufficiently large electrical conductivity, while LTO possesses extremely safe “zero-strain” Li-ion insertion/extraction properties. High energy ball milling and heat treatment procedures were employed in the solid-state synthesis of Si/LTO/PAN ternary composite. This presentation will discuss a systematic study on the effect of precursor nature, versatility of components ratios in the composite electrode structure and highlight the process parameters, which play an important role in overcoming problems of Si anode and improving its physical and electrochemical properties. Acknowledgements This work was supported by the project grant 5097/GF4 “Development of a novel quartz (SiO2) based anode material for Li-ion batteries” from the Ministry of Education and Science of the Republic of Kazakhstan. References: [1] S. Goriparti, C. Capiglia, J. Power Sources 257 (2014) 421-443. [2] S. Jing, Y. Liang, L. Li, Y. Peng, H. Yang. Electrochimic. Acta 155 (2015) 125-131. [3] W. Yuping, S. Fang, Y.Jiang. J. Power Sources 75 (1998) 201-206.