Diffusion coefficient analysis of aluminum electrolysis spent cathode as anode material for lithium-ion battery

Abstract

The aluminum electrolysis spent cathode (SC) was treated by hydrothermal method and used as anode material for lithium-ion battery. The purified SC material shows excellent electrochemical performance. In order to understand the diffusion behavior of Li + in the SC electrode, the diffusion coefficient of Li + in the SC electrode was systematically analyzed by galvanostatic intermittent titration technique (GITT), cyclic voltammetry (CV), and electrochemical impedance spectroscopy (EIS). The results show that the diffusion coefficient (D Li + ) of Li + in SC electrode is calculated by CV is 2.2292×10 -11 cm 2 •s -1 , which is calculated by GITT and EIS ranges are 4.2286×10 -13 -2.9667×10 -10 cm 2 •s -1 , 4.05×10 -13 -3.87×10 -12 cm 2 •s -1 , respectively. SC electrode exhibits better Li + diffusion kinetics compared to commercial graphite (CG). In addition, the full cell of LiNi0.5Co0.2Mn0.3O2/SC also shows excellent cycle performance. After 80 cycles at 1 C (1 C=172 mA•g -1 ), the specific discharge capacity of LiNi0.5Co0.2Mn0.3O2/SC full-cell can reach 94.7 mAh•g -1 , and the capacity retention can reach 98.13%. The fast lithium-ion diffusion rate and high discharge capacity provide a feasible direction for the high value utilization of aluminum electrolysis spent cathode.

Intertwined CNT Assemblies as an All-Around Current Collector for Volume-Efficient Lithium-Ion Hybrid Capacitors

“…In this context, the enhanced rate capabilities of CNT sheet-based LIHCs are ascribed to improved Li + ion diffusivity of LIG−CNTs, as already discussed in Figure 4E,F. 68 Furthermore, the AC−CNT and LIG−CNT LIHCs exhibit excellent cycling performance with 79% capacity retention after 10,000 cycles, whereas the conventional LIHCs retain only 58% of their initial capacity (Figure 5D). Ex situ EIS measurements, as a function of cycle number, are conducted to investigate the effects of CNT-based current collectors on cycling stability.…”

“…Therefore, the power performance of LIHCs is closely related to the Li + ion transport kinetics of anodes. In this context, the enhanced rate capabilities of CNT sheet-based LIHCs are ascribed to improved Li + ion diffusivity of LIG–CNTs, as already discussed in Figure E,F …”

Facile Synthesis of Three-Dimensional Porous ZnO Nanoflowers for High-Performance Anodes in Rechargeable Batteries

“…Because of its accuracy, herein the CV method was adapted and the results at different scanning rates are presented in Figure 4(a). The equation to calculate the Li + diffusion coefficient is shown below [16]:…”

“…The electrochemical workstation (Gamry Interface 1010E) was employed to determine the electrochemical impedance spectroscopy (EIS, 100 kHz-0.01Hz) and the cyclic voltammograms (CVs) at various scanning rates ranging from 0.01 to 1 mV s -1 . The Li + diffusion coefficient was figured out by using the chemical coefficient formula [16], which is based on the CV data.…”

Optimization and Mechanistic Investigation of Electrochemical Performance and Diffusion Behavior of MgFeP 2 O 7 Prepared via Sol-Gel Method in Magnesium Batteries

“…In recent years, the signi cant increase in energy [1][2][3][4] demand has led to the widespread application of ion batteries [5]. Lithium-ion batteries, as high-performance batteries, have found a place in the international energy eld [6][7][8][9][10][11]. However, due to the reduction of domestic resources, batteries using elements such as magnesium, sodium, and zinc are rapidly developing to meet the growing energy demand [4,[12][13][14].FePO 4 [1,6,10,15] is a mainstream cathode material for lithium-ion batteries, and magnesium iron phosphate [16,17]has advantages over other materials.…”