Discharge capacity

Eig. 14. Retention of discharge capacity of miniature 2inc—mercuric oxide batteries after storage at temperatures of A, 40°C B, 20°C and C, 0°C (21). 

Fig. 21. Retention of discharge capacity of miniature zinc—air battery having an unopened sealed cell after storage at 20°C (-) projected data (21).

Fig. 8. Discharge capacity of small sealed nickel—cadmium cells where the hiitial charge is 0.1 C x 16 h at 20°C and the discharge is 1 C at temperatures of...

Fig. 3. CeU voltage profiles as a function of discharge capacity for rechargeable "AA" ceUs A, Li ion B, Li—SO2 C, Li—Mn02 L), Li—TiS2 E, Li—M0S2 F,...

Method of separation Rotor type Centrifuge type Manner of liquid discharge Manner of solids discharge or removal Centrifuge speed for solids discharge Capacity ... 

The discharge curve (Fig. 8) is another important feature of battery systems therefore the terminal voltage is plotted against the discharge capacity. For an ideal battery the terminal voltage drops to zero in a single step when the stored energy is completely consumed. 

Charge-discharge capacity/mAh Figure 20. Charge-discharge characteristics of an Ni—MH battery (cell type AA). 

Improvement of Mm(Ni - Co - A1 - Mn)x type alloys has been achieved in various ways. It was reported that alloys with a nonstoichiometric composition [Mm(Ni - Co - Mn - Al), 4.5 < jc < 4.8] had a larger discharge capacity than those with stoichiometric alloys [26-27J. Using X-ray diffraction analysis, it was found that the larger capacity is dependent on an increase in the unit cell volume of alloys with x=4.5-4.8. It was also reported that annealing treatment improved the durability of this type of alloy. 

Figure 45. Dependence of discharge capacity on load (ML2430)...

Lithium-nickel oxides form various lithium compounds, lithium hydroxides (LiOH), Li2C03, nickel hydroxide (Ni(OH)2), nickel carbonate (NiC03) and nickel oxide (NiO). Figure 51 shows the discharge characteristics of lithium-nickel oxides synthesized from these compounds. They were heat-treated at 850 °C for 20 h in air. Although the lithium nickel oxides showed a smaller discharge capacity than that of LiCo02, LiOH and Ni(OH)2 were considered to be appropi-ate raw materials. 

LiMn204 is less than 150 mAhg 1. Consequently, the main feature of LiMn204 is its low cost, but the discharge capacity is also lower than LiCo02 and LiNi02. 

Figure 61. Relationship between discharge capacity, initial efficiency, and L, of soft carbon materials.

Figure 61 shows the relationship between the discharge capacity, the initial efficiency, and the L of some soft carbon materials when ethylene carbonate was used as a solvent. Figure 62 shows the re-... 

Polyacene is classified as a material which does not belong to either soft or hard carbons [84], It is also made by heat-treatment of phenol resin. As the heat-treatment temperature is lower than about 1000 °C, polyacene contains hydrogen and oxygen atoms. It has a conjugated plane into which lithium ions are doped. It was reported that the discharge capacity of polyacene is more than 1000 mAhg. However, there are no practical lithium-ion batteries using polyacene. 

Figure 2. Schematic semi-ideal discharge curves of Mn02 in 9 mol L 1 and 5 mol L 1 NH4CI2 + 2 mol L l ZnCl2 solutions. IL, range of discharge capacity of commercial alkaline MnO, - Zn R2, range of discharge capacity of commercial Leclanche or zinc chloride cells.

---