Chemistry & Cell Components

Chemistry & Cell Components

Active

Cathodes

Anodes

Inactive

Material Properties

Capacity (mAh/g)

Sulfur Carbon

Safety is better relative to conventional Li-ion Voltage window prohibitive to pack design Poor volumetric energy density due to tap density

SPAN

Poor volumetric and gravimetric energy Limited power density due to nominal voltage

Lithium Sulfide

High moisture sensitivity leads to higher costs Poor volumetric energy due to tap density

Silicon

Poor volumetric energy due to tap density Feedstock limits costs & quality

Lithium/ Lithium Alloy

Need to manage high volume change Limited cycle life reported

Material Properties

Voltage Range (V)

Tap Density (g/cm3)

Description

Cycle Life

Prospects & Challenges

Prospects & Challenges

Ether based

LiTFSI salt in ethers / fluoro ethers

Ethers solubility allows for a broad use of additives and salts for anode stability Ethers dissolve active CAM material within the cell

Carbonate based

LiPF6 salt in Cyclic/Linear carbonate mixtures

Good oxidative stability, but need to manage gas generation/accumulation

Aluminum Foil

Used at Cathode

At < 1 V aluminum will react with Lithium Weight of Al significant vs cathode loading

Copper Foil

Used at Anode

Copper weight is a significant impact on overall cell weight Due to chemistry window - Copper should be ok at 0V

Electrolyte

Current Collector

Lithium Sulfur | Materials Selection

Lithium Sulfur | Materials Selection

Extracted from the PDF; charts and images may read imperfectly.