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 …”

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.…”