Analyzing Discharging and Charging Performance of a Lithium-Ion Battery

Abstract

Lithium-ion batteries are indispensable parts in electric vehicles, owing to their high energy density, discharge and charge efficiency. Therefore, it is essential to investigate their charging and discharging behavior at different current rates. The purpose of this investigation was to determine and analyses the discharge and charge behavior of a lithium-ion battery at different conditions. In addition, the relationship between cycle number, current and capacity during discharging and charging were analyzed. It was concluded that the extracted charge declined nonlinearly with the amount of the discharging current.

Internal and External Cultivation Design of Zero‐Strain Columbite‐Structured MNb2O6 toward Lithium‐Ion Capacitors as Competitive Anodes

“…In general, the smaller the charge–discharge current density, the more reaction of electrodes will occur, rendering even larger rversible capacities. [ 48 ] Accordingly, the ex situ XRD measurement during the initial two cycles at different (de)lithiation states of CdNb 2 O 6 is performed at a small current density of 0.1 A g −1 , as presented in Figure 7 a. Obviously, the reflection at 2 θ = 29.4 °, corresponding to the (131) plane, gradually shifts to the smaller 2 θ values during the discharge process, and then goes back to large diffraction angles in the charging process.…”

“…In general, the smaller the charge-discharge current density, the more reaction of electrodes will occur, rendering even larger rversible capacities. [48] Accordingly, the ex situ XRD measurement during the initial two cycles at different (de)lithiation states of CdNb 2 O 6 is performed at a small current density of 0.1 A g −1 , as presented in are 0.32%, 0.59%, 0.46%, 0.48%, 0.41% and 0.33%, respectively, indicative of their "zero strain" trait for efficient lithium storage, which is particularly competitive to other intercalation-type anodes (Figure 7d). [20,28,[49][50][51][52][53] Such small volume expansion guarantees the robust structural stability, which effectively suppresses the intergranular cracking and shed during the unremitting charge/discharge process, ensuring good cycling stability of the MNb 2 O 6 samples to a certain extent.…”