High Purity WS2 for Lithium Batteries of Electromobiles

As for the new generation lithium batteries for electromobiles, the energy storage electrodes are suitable for mixing high-purity WS₂ powders as modifiers during production, which can make the prepared products have better high temperature resistance and longer battery life. These advantages are mainly due to the excellent thermochemical properties of high-purity tungsten disulfide nanoparticles and superior storage performance.

In addition to high-purity WS₂ nanoparticles that could be used to prepare electrode materials for lithium batteries, they can also be used as solid lubricants, dry film lubricants, and self-lubricating composite materials. Lubricants are also an important component in battery cars like batteries.

Nano tungsten disulfide is a perfect solid lubricant with a friction factor of 0.01-0.03 and a compressive strength of up to 2100MPa. It holds strong resistance to acid and alkali corrosion, as well as the better load resistance, wider use temperature, and long lubrication life. It is also eco-friendly.

However, in recent years, with the continuous upgrading of chemical technology and the increasing demands of lithium batteries, the development of new nano-lubricating additives has become a crucial factor for the rapid development of global manufacturing. The solid lubricant hollow fullerene nano-tungsten sulfide has attracted mass attention from international researchers because of its ultra-low friction and wear.

Study on the extreme pressure and anti-wear synergistic properties of fullerene and nano-tungsten disulfide: The fullerene and high-purity WS₂ are compounded and added to the polyalphaolefin (PAO) base oil, and 4% methylnaphthalene dispersant is added and ultrasonically dispersed. The four-ball testing machine is used to observe the PAO base oil of extreme pressure and anti-wear performance and synergy in the base oil.

Experiments show that the antifriction effect of fullerene and nano-tungsten disulfide single agent in PAO base oil is not ideal, and the oil samples with different compound ratios show different antifriction effects, of which 0.01wt% fullerene plus 0.005wt% tungsten disulfide compound oil sample has the most obvious anti-friction effect.

Adding fullerene and nano tungsten disulfide single agent and the anti-wear performance of the oil sample after the compounding are all improved, especially 0.01wt% fuller the anti-wear synergistic effect of the oil sample compounded with olefin and 0.005wt%, WS2 is the best. But the extreme pressure performance of the base oil compounded with fullerene and nano tungsten disulfide is not greatly improved.

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