Effect of Si-Based Anode Lithiation on Charging Characteristics of All-Solid-State Lithium-Ion Battery
Alexander S. Rudy,
Sergei V. Kurbatov,
Alexander A. Mironenko,
Victor V. Naumov,
Alexander M. Skundin,
Yulia S. Egorova
Affiliations
Alexander S. Rudy
Department of Nanotechnology in Electronics, Physical Faculty, P.G. Demidov Yaroslavl State University, Sovetskaya St., 14, 150003 Yaroslavl, Russia
Sergei V. Kurbatov
Department of Nanotechnology in Electronics, Physical Faculty, P.G. Demidov Yaroslavl State University, Sovetskaya St., 14, 150003 Yaroslavl, Russia
Alexander A. Mironenko
Department of Nanotechnology in Electronics, Physical Faculty, P.G. Demidov Yaroslavl State University, Sovetskaya St., 14, 150003 Yaroslavl, Russia
Victor V. Naumov
Department of Nanotechnology in Electronics, Physical Faculty, P.G. Demidov Yaroslavl State University, Sovetskaya St., 14, 150003 Yaroslavl, Russia
Alexander M. Skundin
Laboratory of Processes in Chemical Current Sources, Frumkin Institute of Physical Chemistry and Electrochemistry, 31, Leninskii prospect, 119071 Moscow, Russia
Yulia S. Egorova
Department of Nanotechnology in Electronics, Physical Faculty, P.G. Demidov Yaroslavl State University, Sovetskaya St., 14, 150003 Yaroslavl, Russia
The description of the design, manufacturing technology, and test results of thin-film solid-state lithium-ion batteries with a nanocomposite negative electrode Si@O@Al is given herein. This electrochemical system features the hike on the charging curve plateau, which is interpreted as the change from I–V of the Ti-Si@O@Al contact. The latter is due to the change in the type of silicon conductivity during lithiation, as a result of which the ohmic metal-semiconductor contact proves to be biased in the reverse direction, and the charging current is maintained by minority charge carriers. It is shown that the current-conducting component Si@O@Al is formed by a solid solution a-Si(Al), which has a p-type conductivity. The change in the type of conductivity occurs as a result of silicon compensation through lithiation. It was found that Si@O@Al is nonlinear conductor, which can be considered as a percolation cluster formed by amorphous silicon nanoparticles and molecular clusters of silicon dioxide. The height of the Schottky barrier of the Ti|a-Si(Al) contact and the electron affinity of the a-Si(Al) solid solution were estimated.
