Degradation Analyses of Commercial Lithium-Ion Cells by Temperature/C-rate Controlled Cycle Test

Abstract

Cycle life tests of commercial 18650-type lithium-ion cells were conducted at temperatures of 0°C, 25°C, and 45°C and current rates of 1 C and 2 C. Surprisingly, the discharge capacity rapidly decreased at 0°C regardless of the current rate. On the other hand, the discharge capacity decreased faster at 45°C than at 25°C for a rate of 1 C, and this decrease was faster at 25°C than 45°C for a rate of 2 C. Electrodes and electrolytic solutions of the degraded cells were characterized by several analytical methods. X-ray photoelectron spectroscopy revealed differences between solid electrolyte interface components according to test temperature. The carbonate ratio was high at low temperature while the phosphate ratio was high at elevated temperature. The observed cell degradations were caused by several factors exhibiting various temperature and current rate dependencies.

Degradation Analysis of LiNi0.8Co0.15Al0.05O2 for Cathode Material of Lithium-Ion Battery Using Single-Particle Measurement

“…Recently, they have also been used in electrically driven vehicles (xEVs) such as battery electric vehicles (BEVs) and plug-in hybrid electric vehicles (PHEVs). It is well-known that the degradation of LIBs, i.e., reduction in capacity and power, occurs after repeated charge/discharge and storage. , We performed cycle life and storage life tests on LIBs under various conditions and reported that the degradation factors are mainly related to solid electrolyte interphase (SEI) formation and cathode degradation. , It is known that the electrolyte solution is reduced at the anode. The reduction products are deposited on the anode to form the SEI. , In this process, electricity is mainly consumed during charging by the extraction of Li + ions from the cathode.…”

“…It is well-known that the degradation of LIBs, i.e., reduction in capacity and power, occurs after repeated charge/discharge and storage. 1,2 We performed cycle life and storage life tests on LIBs under various conditions and reported that the degradation factors are mainly related to solid electrolyte interphase (SEI) formation and cathode degradation. 3,4 It is known that the electrolyte solution is reduced at the anode.…”

A review of thermal physics and management inside lithium-ion batteries for high energy density and fast charging

“…Matsuda et al performed cycle life tests of commercial 18650 cells (Fig. 3a) at various temperatures (0 °C, 25 °C, and 45 °C) and charge rates (1C and 2C) [90]. In their study, the cycle life was better at 45 [74].…”

“…Resistance Temperature Detectors (RTDs) and Thermistors both rely on a calibrated relationship between the electrical resistance of a conductor (or semiconductor) and its temperature [90]. RTDs have a typical temperature resolution and sensitivity of 0.01-0.2 K and 0.38%/K, respectively [98].…”

A study of the capacity fade of a LiCoO2/graphite battery during the temperature storage process at 45 °C under different SOCs

“…[18][19][20][21] Other studies have argued that the capacity of lithium-ion batteries during storage decreases due to the instability of the interface between the electrodes and the electrolyte, the formation of excessive solid electrolyte interfaces (SEI), uneven lithium deposition, and the dissolution and decomposition of active substances such as (Co 3+ ) leading to capacity degradation. [22][23][24] In addition, it is commonly acknowledged that temperature is the most important factor affecting the storage life of lithium batteries, [25][26][27][28] storage at hightemperature accelerates the decomposition of the electrolyte, leading to rapid capacity degradation, [29][30][31][32][33][34] Besides, decomposition products of the electrolyte will accumulate on the surface of the electrodes, leading to an increase in battery resistance and a deterioration in battery multiplication performance. 35 In our team's previous work, we have revealed the relationship between dead lithium and lost capacity at high temperature (65 °C).…”