TY - JOUR

T1 - Atomic Layer Deposition Titanium Oxide Coating for C-Rate Improvement of Li-Ion Cathodes

AU - Ольховский, Денис

AU - Иванова, Дарья

AU - Чернявский, Вадим

AU - Вишняков, Павел

AU - Назаров, Денис Васильевич

AU - Ежов, Илья

AU - Яфарова, Лилия

AU - Peng, Shengjie

AU - Максимов, Максим

PY - 2024/2/8

Y1 - 2024/2/8

N2 - Today, lithium-ion batteries (LIBs) are the most widespread technology for electric energy storage. However, the technology requires further improvement, and one of the directions is atomic layer deposition protective coating creation on LIBs electrodes. The titanium oxide thin films influence on the NCM111 cathode electrochemical characteristics as a function of coating synthesis temperature and thickness was studied in this work. Separately, the Solef5130 binder heat treatment effect was studied using thermogravimetry with differential scanning calorimetry. The presence of titanium and its crystallinity degree on the cathode surface were confirmed by X-ray photoelectron spectroscopy, scanning electron microscopy with energy dispersive spectroscopy and Raman spectroscopy. Cathode’s C-rates were studied depending on discharge current, voltage and the number of charge-discharge cycles. Cyclic voltammetry and impedance spectroscopy were used to analyze the possible additional electrochemical reactions and coating influence on the resistance. As a result, cathodes with atomic layer deposition titanium oxide layers demonstrate cyclic stability and increased capacity retention (up to about 20%) with increasing discharge current (1C), and the coating synthesis temperature on the cathode surface plays a significant role in the final batteries capacity performance. NCM111 coating with titanium oxide films obtained by the atomic layer deposition; Study of the binder heat-treatment effect on the cathode performance; The importance of selecting the protective coating synthesis temperature; Modified cathode’s capacity preservation improvement with increasing current.

AB - Today, lithium-ion batteries (LIBs) are the most widespread technology for electric energy storage. However, the technology requires further improvement, and one of the directions is atomic layer deposition protective coating creation on LIBs electrodes. The titanium oxide thin films influence on the NCM111 cathode electrochemical characteristics as a function of coating synthesis temperature and thickness was studied in this work. Separately, the Solef5130 binder heat treatment effect was studied using thermogravimetry with differential scanning calorimetry. The presence of titanium and its crystallinity degree on the cathode surface were confirmed by X-ray photoelectron spectroscopy, scanning electron microscopy with energy dispersive spectroscopy and Raman spectroscopy. Cathode’s C-rates were studied depending on discharge current, voltage and the number of charge-discharge cycles. Cyclic voltammetry and impedance spectroscopy were used to analyze the possible additional electrochemical reactions and coating influence on the resistance. As a result, cathodes with atomic layer deposition titanium oxide layers demonstrate cyclic stability and increased capacity retention (up to about 20%) with increasing discharge current (1C), and the coating synthesis temperature on the cathode surface plays a significant role in the final batteries capacity performance. NCM111 coating with titanium oxide films obtained by the atomic layer deposition; Study of the binder heat-treatment effect on the cathode performance; The importance of selecting the protective coating synthesis temperature; Modified cathode’s capacity preservation improvement with increasing current.

UR - https://www.mendeley.com/catalogue/7afe7e06-8199-3a36-b073-9be977fa950d/

U2 - 10.1149/1945-7111/ad242c

DO - 10.1149/1945-7111/ad242c

M3 - Article

VL - 171

JO - Journal of the Electrochemical Society

JF - Journal of the Electrochemical Society

SN - 0013-4651

IS - 2

M1 - 020508

ER -