Polyelectrolyte and energy storage device

Abstract

A polyelectrolyte includes a first segment and a second segment, wherein the structure of the first segment is at least one of formula (1) and formula (2); the structure of the second segment is at least one of formula (3) and formula (4). The polyelectrolyte undergoes microphase separation to form a nanoscale ordered self-assembled microstructure.

Description

technical field [0001] The invention relates to an energy storage technology, in particular to a polyelectrolyte and an energy storage element. Background technique [0002] As people's demand for lithium secondary batteries with high power and high energy density continues to increase, more and more research institutes are committed to improving their safety and stability. And because people's dependence on portable electronic products is increasing, and it is expected to increase the application of electrochemical energy storage devices in vehicles, uninterruptible power systems, etc., the safety of lithium secondary batteries must be further strictly required, especially for high-altitude flights aircraft or space shuttle. The current research on safety usually focuses on the development of flame retardant additives, solid electrolytes or new electrolyte systems, etc., all of which are aimed at improving various problems of liquid electrolytes and increasing the thermal ...

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Problems solved by technology

[0004] Although the above-mentioned polyelectrolyte can inhibit the deposition and puncture of lithium metal, increase the safety of lithium batteries, and can be prepared flexibly in size and shape, it is suitable for various lithium batteries, but its poor ion conductivity (solid polymer electrolyte is ~ 10 -5 S / cm, single ion conductor is ~10 -6 S / cm) has been hindering its application and commercialization

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