Improvement of electrochemical and thermal stability of LiFePO4 cathode modified by CeO2

Analysis of the chemical diffusion coefficient of lithium ions in Li3V2(PO4)3 cathode material

“…Thus, the physical meaning of the chemical diffusion coefficient D Li + as a function of the composition in the situation of two-phase coexistence becomes obscure. However, in the literature, we can easily find D Li + for intercalation systems with two-phase reactions [18,24,25,30]. In these cases, the obtained diffusion coefficients from EIS and GITT measurement, may be taken as an effective measure which reflects the intensity of long-and short-range interactions between the intercalated species.…”

Electrochemical performance of microdisc-shaped carbon-coated lithium iron phosphate with preferentially exposed (010) planes in lithium sulfate aqueous solution

“…As one of the promising cathode materials for aqueous rechargeable Li-ion battery, LiFePO 4 has been investigated in various aqueous electrolytes with different methods by many research groups [18,[23][24][25][26][27][28][29][30][31][32].…”

Synthesis, characterization and electrochemical performances of MoO2 and carbon co-coated LiFePO4 cathode materials

“…The values of the apparent lithium ion diffusion coefficient vary from 4.92 Â 10 À 11 to 1.69 Â 10 À 10 cm 2 s À 1 during charge and from 3.59 Â 10 À 11 to 1.12 Â 10 À 10 cm 2 s À 1 during discharge depending on the MoO 2 content. Sample D gives the highest value of 1.69 Â 10 À 10 cm 2 s À 1 during charge and 1.11 Â 10 À 10 cm 2 s À 1 during discharge, and they are higher than CeO 2 modified LiFePO 4 /C composites [21] and V 2 O 3 modified LiFePO 4 /C composites [23] and ZnO incorporated LiFePO 4 cathode materials [31]. It is found that the apparent lithium ion diffusion coefficient in the charge process is slightly larger than in the discharge process, it is clarified that the discharge process in LiFePO 4 is slower than the charge process.…”

“…Li et al [20] proposed that SiO 2 coated LiFePO 4 /C effectively enhanced the cycling capacity and reduced capacity fading at high temperature and alleviated the cell impedance. Liu et al reported that the electrochemical lithiumion deintercalation-intercalation processes of CeO 2 modified LiFePO 4 electrodes were improved compared to the pristine www.elsevier.com/locate/ceramint LiFePO 4 electrode [21]. CuO and carbon co-coated LiFePO 4 was reported by Cui et al [22], the study found that the co-coating reduced the capacity fading and the interfacial resistances and the polarization of the cathode.…”