Open AccessВлияние диффузионных барьеров на емкостные свойства композитных анодов состава Si-CuSi-Cu
Author(s) -
Э.Ю. Бучин,
А. А. Мироненко,
В. В. Наумов,
А. С. Рудый
Publication year - 2020
Publication title -
pisʹma v žurnal tehničeskoj fiziki
Language(s) - English
Resource type - Journals
eISSN - 1726-7471
pISSN - 0320-0116
DOI - 10.21883/pjtf.2020.19.50034.18389
Subject(s) - anode , lithium (medication) , materials science , copper , ion , cobalt , electrode , diffusion , silicon , analytical chemistry (journal) , chemical engineering , optoelectronics , metallurgy , chemistry , thermodynamics , medicine , physics , organic chemistry , chromatography , engineering , endocrinology
As an anode material for liquid lithium-ion batteries, film structures consisting of several identical modules [Co(x)/a-Si(100)/Cu(70)], where the value of x varied from 2 to 10 nm, have been studied. It is shown that relatively thick cobalt layers are effective diffusion barriers for silicon and copper atoms, as well as lithium ions. This leads to a decrease in the capacitive properties of the studied films. Thin cobalt layers (less than 3 nm) with a network structure, on the contrary, contribute to an increase in the capacitive properties of anode films. This is due to a more uniform distribution in their volume of drift channels of lithium ions, which are formed at the initial stage of electrode cycling.