Polyurethane in new energy battery cabinet

How is a hyperbranched polyurethane (HPU) solid electrolyte prepared?

Herein, a hyperbranched polyurethane (HPU) solid electrolyte is prepared by the reaction of hyperbranched polyethylene glycol and isophoradione diisocyanate in the presence of lithium salt and ionic liquid for the first time.

Why is hyperbranched polymer used in lithium ion batteries?

Low room temperature ionic conductivity of solid polymer electrolytes (SPE) greatly constraints its application in the solid lithium-ion batteries. Hyperbranched polymer with unique topological structure as matrix of SPE is expected to solve this issue due to its low crystallinity and rich functional groups which helps dissociation of lithium salt.

Can hyperbranced PU-based electrolyte be used in solid-state lithium-ion batteries?

After half-cell tests with multiple positive and negative active materials as cathode, the cells with HPU1.5-IL1.5 was able to achieve adaptation and stable cycling at room temperature, proving the promising application of hyperbranced PU-based electrolyte in solid-state lithium-ion batteries.

Why is hyperbranched polyurethane a topological polymer?

Hyperbranched polymer is one of important topological polymer. Hyperbranched polyurethane (HPU) as polymer electrolyte matrix has some unique advantages . Hyperbranched polyurethane possesses the feature of being less prone to crystallization due to its highly branched structure, which is beneficial to ion transport .

Are lithium-ion batteries a high energy density energy conversion device?

1. Introduction Lithium-ion batteries (LIBs), as one of important high energy density energy conversion devices , , have been widely used owing to outstanding advantages such as high energy density and long cycle life.

Does hyperbranched polyurethane promote ion conduction and interfacial compatibility?

Thanks to the synergistic effect of hyperbranched polyurethane and IL for promoting ion conduction and interfacial compatibility, the obtained HPU1.5-IL1.5 electrolyte is capable of achieving a high conductivity of 0.4 mS cm −1 at room temperature and possesses a stable electrochemical window of 4.95 V.