Ultra-high voltage battery technology

Can a lithium battery be charged at high voltages?

Charging at high voltages in principle makes batteries energy dense, but this is often achieved at the cost of the cycling stability. Here the authors design a sulfonamide-based electrolyte to enable a Li metal battery with a state-of-the-art cathode at an ultra-high voltage of 4.7 V while maintaining cyclability.

What is a high-voltage wide-temperature electrolyte (HWE)?

The resulting high-voltage wide-temperature electrolyte (HWE) not only possesses low desolvation energy, fast Li+ transport, high oxidation stability, excellent thermal-abuse tolerance and non-flammability, but also enables the formation of both inorganic-rich cathode electrolyte interphase (CEI) and solid electrolyte interphase (SEI).

What is a fluorinated electrolyte for high-voltage Li metal batteries?

To address these issues, we developed an all-fluorinated electrolyte for high-voltage Li metal batteries, which contains 1 M LiPF 6 dissolved in a mixture of fluoroethylene carbonate (FEC): 2,2,2-trifluoroethylmethyl carbonate (FEMC): 1,1,2,3,3,3-hexafluoropropyl-2,2,2-trifluoroethylether (HTE) with a volume ratio of 1: 6: 3.

Can a heteroatom-based gel polymer electrolyte produce a high-energy “shuttle-relay” lithium battery?

Here, we report the combination of a heteroatom-based gel polymer electrolyte with a hybrid cathode comprising of a Li-rich oxide active material and graphite conductive agent to produce a high-energy “shuttle-relay” Li metal battery, where additional capacity is generated from the electrolyte’s anion shuttling at high voltages.

Why is a high voltage cathode a good choice for Polyether electrolytes?

Due to the inhibition of electrolyte decomposition at high voltage, it is conducive to the formation of inorganic-rich cathode-electrolyte interphase (CEI), which greatly improves the compatibility between polyether electrolytes and high voltage cathodes.

Why do we need high-energy density lithium batteries?

With the rapid development of electric vehicles and grid-scale energy storage systems, the need for high-energy density lithium batteries with high voltage and safety performance is becoming more and more compelling , , .