Discharge natural graphite

Figure 66. Discharge characteristics of the LiCo02 -natural graphite cell.

Figure 6. Low rate charge discharge performance of natural graphite electrode [13J.

Figure 4. Charge/discharge curves of the surface treated natural graphite SLC1015 vs. Li/Lt in MLiPF6, EC.DMC (50 50 wt%).

Figure 5. ASI vs. DOD for cell using surface treated natural graphite SLC1015 as anode in 1.2MLiPF6, EC/PC/MEC (30 30 40 wt%). Pulse discharge at 10C rate.

Figure 5. First charge and discharge of CR2016 coin type half-cells with anodes based on the 15 pm, spheroidized natural graphite (bold line) and the similar graphite modified by 8wt% Si at the C/15 rate.

Figure 2. Galvanostatic charge/discharge curves of natural graphite LBG1025 at C/20, C/5 and C/2 rates. Electrolyte EC-DMC (1 1) LiPF6 (1M).

Fluorination of natural graphite powder (x4 pm) by a gas mixture of F2, HF and IF5 yielded high fluorine content samples, CF0.8, CF0 9 and CF] 0 [34]. The structural parameters obtained by X-ray diffraction were 7C = 0.59 nm and oq = 0.246 nm. XPS data indicated the existence of two Cls peaks at 287.0 eV and 289.4 eV, and one F]S peak at 688.0 eV, which are intermediate values between those for semi-ionic and covalent C—F bonds. Galvanostatic discharge of these CFV samples was done... 

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