Self-discharge tests to measure side-reaction currents of a Li[Li_1/3Ti_5/3]O_4 electrode
| Autor: | Yusuke Yamada, Takahide Toda, Kingo Ariyoshi |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
リチウムイオン電池
General Chemical Engineering Analytical chemistry chemistry.chemical_element 02 engineering and technology 010402 general chemistry 01 natural sciences リチウムイオンバッテリー Analytical Chemistry Aluminium Lithium-ion battery Electrochemistry Self-discharge 021001 nanoscience & nanotechnology Side-reaction 0104 chemical sciences Titanium oxide Nickel State of charge chemistry Electrode Lithium titanium oxide Lithium 0210 nano-technology Electrode potential |
| Zdroj: | Journal of Electroanalytical Chemistry. 864:114110 |
| ISSN: | 1572-6657 |
| Popis: | The lifetime performance of lithium-ion batteries is a critical issue for automobile and stationary applications. The difference in the side-reaction current (ISR) of electrodes causes deviations of the state of charge (SOC) of the electrodes leading to the capacity fading of lithium-ion batteries. Establishment of a method to measure the ISR is important for understanding the capacity fading mechanism. We report herein that a novel and simple method to determine the ISR in lithium-ion batteries, the self-discharge test, was developed and applied to lithium-ion cells with lithium titanium oxide (Li[Li1/3Ti5/3]O4, LTO), lithium aluminum manganese oxide (Li[Li0.1Al0.1Mn1.8]O4, LAMO), and lithium nickel manganese oxide (Li[Ni1/2Mn3/2]O4, LiNiMO) as electrodes. According to the self-discharge test results, the ISR of LTO is affected by another electrode of LAMO or LiNiMO. The ISR of LTO in LTO/LiNiMO cells larger than that in LTO/LAMO cells is explained by the additional-ISR of LTO, which results from side reactions such as the reduction of oxidized products generated at the positive electrode. The side reactions at the positive electrode are accelerated with increasing electrode potential, meaning that the higher potential of the positive electrode resulted in the larger additional-ISR of LTO. The real side-reaction current of the LTO electrode in lithium-ion cells is the sum of the intrinsic and the additional current (real-ISR = intrinsic-ISR + additional-ISR). |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect