Litium Järnfosfat Energilagringscelldesign

Litium (77) Lithium järnfosfat, även känt som LiFePO4 eller bara LFP, är en typ av litiumjonbatteri som har blivit alltmer populär inom olika tillämpningar tack vare dess fördelar och egenskaper. …

What is LiTFSI used for?

LiTFSI was proposed as electrolyte salt in 1983 and later commercialized by 3 M and Rhodia (later acquired by Solvay). Nowadays, hundreds of tons of LiTFSI have been produced and are used as co-salt for lithium-ion batteries, as well as electrolyte salt for post-lithium-ion batteries such as Li-S batteries.

What is lithium bis (trifluoromethanesulfonyl)imide (LiTFSI)?

Among them, lithium bis (trifluoromethanesulfonyl)imide (LiTFSI) has gained the most attention from both academia and industry. LiTFSI was proposed as electrolyte salt in 1983 and later commercialized by 3 M and Rhodia (later acquired by Solvay).

How does lithium salt affect nmc811 slurry gelation?

For example, the residual lithium salt on NMC811 surfaces increases the pH value of the slurry and triggers gelation (Fig. 2a,b) due to the dehydrofluorination of the PVDF (polyvinylidene difluoride) binder 28, 29, making large-scale coating a challenge.

How to make lithium metal foil from an ingot?

There are three main strategies to generate lithium metal foils from an ingot, namely mechanical extrusion and rolling (Fig. 3a), evaporation/sputtering (Fig. 3b) and electrochemical plating (Fig. 3c). Mechanical rolling is the most widely used method for commercial lithium metal foils, due to the low cost and scalability of roll-to-roll.

What makes Li metal stand out in Li-based batteries?

Li metal is promising to achieve the highest energy density in Li-based batteries due to its low potential and high specific capacity. Unlike other electrode materials, Li metal immediately forms a SEI in a corrosion-like process within a few μs, as can be seen in simulation results shown in Fig. 10C.

Is LiTFSI thermally stable?

LiTFSI is thermally stable up to 380 °C , readily soluble in most donor solvents, and the resulting solution shows decent ionic conductivities (e.g., σ (25 °C) = 7.6 × 10 −3 S cm −1 for 1 M LiTFSI-EC/EMC (30:70, v/v) vs. σ (25 °C) = 9.3 × 10 −3 S cm −1 for 1 M LiPF 6 -EC/EMC (30:70, v/v) ).