Thematic area of the work 
"Nanocomposites and nanomaterials"

Electrochemical characteristics of silicon oxide with water-soluble binder for new generation of LIBs
Potapenko O.V.1,2, Potapenko A.V.1,2, Krushevskyi O.V1
1Joint Department of Electrochemical Energy Systems, 38A Vernadsky Ave., Kiev 03142, Ukraine
E-mail: avoloshka@ukr.net
2Faculty of Materials Metallurgy and Chemistry, Jiangxi University of Science and Technology, Ganzhou, Jiangxi, P.R. China.

Among the new anode materials proposed for LIB, silicon (Si) is considered as the promising candidate for graphite replacement. It is the second most abundant element in the earth's crust, environmentally friendly, with an ultra-high theoretical capacity (4200 mAh / g). However, a sharp fluctuation in the volume of silicon (~ 400%) in the lithiation / delithiation process and the high production cost of nanostructured silicon seriously hinder its widespread use.
Recently, silicon oxides have been considered as promising substitutes for elementary silicon due to their extremely abundant reserves, low cost, and ease of synthesis.
The active material of the electrode was SL450A-SOCQ silicon oxide (IOPSILION, China) paired with various binders CMC and SBR (Shandong Gelon Lib Co. Ltd., China), and LA136D (Indigo, China). The presence of hydrophilic cyano / amide groups with high polarity in LA136D made it possible to ensure sufficient bond strength between the active material, the conductive agent and the current collector. Adhesion measurements were carried out on the adhesion tester (HI-0350 Shanghai Hengyi Testing Instruments Co. Ltd., China). 
Here, the electrochemical properties of silicon oxide with water-soluble binders have been studied. It has been shown that the use of a combination of CMC and LA136D binder materials allows maintaining 90% of the electrode capacity after cycling for 85 cycles at various charge / discharge modes. It is noted that an increase in the LA136D content in the composition of the electrode leads to a growth in material adhesion. At the same time, this does not affect the specific capacity of the material at a low discharge current density. It can be concluded that the specific capacity of the material strongly depends on the value of the intercalation current of lithium ions.