Hydrothermal synthesis of LiFePO4 micro-particles for fabrication of cathode materials based on LiFePO4/carbon nanotubes nanocomposites for Li-ion batteries

Additive manufacturing enabled, microarchitected, hierarchically porous polylactic-acid/lithium iron phosphate/carbon nanotube nanocomposite electrodes for high performance Li-Ion batteries

“…The XRD patterns of the 3D printed PLA/LFP/CNT cellular nanocomposites with different CNT loadings (Figure S1, supporting information) showed sharper LFP peaks (JCPDS # 811173) without any visible peak of CNT due to intense peaks of LFP with a high order of crystallinity as compared to CNT [41,42]. Hence, Raman analysis is used to confirm the presence of CNT, with stronger D and G bands at 1342 and 1582 cm −1 , respectively, as shown in Figure S2.…”

An ambiguity of laser‐induced degradation in LiFePO4 and advantages of single‐particle approach to Raman spectroscopy

“…The duplet near 1000 cm −1 is commonly observed for LFP decomposition products and can be attributed to the presence of Li 3 Fe 2 (PO 4 ) 3 with the NASICON structure. [ 14,25–29 ] In this case, the decomposition reaction is described as …”

Sol-gel fabricated one-dimensional LiFePO4 microstructures for carbon nanotube-based nanocomposite freestanding sheet as cathode material for Li ion batteries

“…Both LFP7 + MWCNT and LFP8 + MWCNT electrodes displayed an impedance spectrum characterizing the charge transfer resistance (high-frequency semicircle) and Warburg diffusion (low-frequency incline line) of a Liion battery. 14,17 The R s and R ct values were found to be 4.45 V and 52.7 V for LFP8, and 6.14 V and 78.9 V for LFP7, respectively. Higher R ct value in LFP7 + MWCNT is related to lower Li + -ion diffusion at its interface.…”

“…As shown in Figure 2, the XRD pattern for LFP8 revealed intense diffraction peaks, which were well harmonized with JCPDS-811,173 and confirmed the presence of orthorhombic olivine-structured LiFePO 4 with Pnma space group. 14,15 LFP6 and LFP7 mimic the same diffraction pattern but with lower intensity, indicating underdeveloped crystalline microstructures. The absence of impurity peaks throughout Figure 2 confirms the phase purity of synthesized LiFePO 4 materials.…”