Aqueous Polymer Electrolyte

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This invention discloses an environmentally friendly aqueous polymer electrolyte for use in batteries and other electrochemical energy storage devices. The electrolyte is composed mainly of water, a metal ion (such as lithium, sodium, potassium, magnesium, etc.), and a specially designed polymer (such as polyacrylate or polyacrylamide) that helps increase the electrochemical stability window and enhances battery safety and performance. The invention offers an alternative to traditional organic electrolytes, which are typically flammable and toxic.

Use CasesContent extracted from patent full text and abstract with AI.

• Lithium-ion batteries for portable electronics, electric vehicles, or grid storage
• Sodium-, magnesium-, zinc-, or other metal-ion batteries for stationary or backup power systems
• Supercapacitors and hybrid capacitors for rapid energy storage and delivery
• Battery systems requiring enhanced safety and lower toxicity (e.g., for medical devices)
• Low-cost, environmentally friendly batteries for large-scale renewable energy storage

BenefitsContent extracted from patent full text and abstract with AI.

• Non-flammable and non-toxic electrolyte composition, improving safety
• Wide electrochemical stability window, allowing higher operational voltages
• Comparable or higher ionic conductivity to commercial (organic) electrolytes
• Low production cost due to inexpensive and widely available polymer components
• Environmentally friendly – avoids use of toxic or hazardous substances like LiPF6
• Good cycling stability and high capacity retention in batteries
• Leak-free, dimensionally stable gel formulation possible, reducing risk of leaks or spills

Technical Classifications (CPCs)

Inventors & Applicants

Patent Abstract

The present invention relates to an aqueous polymer electrolyte comprising: a) water in a range of ‰¥ 5 wt% to ‰¤ 95 wt%, b) a metal ion component comprising a metal cation selected from the group consisting of Li + , Na + , K + , Mg 2+ , Al 3+ , Ca 2+ , Fe 2+ , Fe 3+ and Zn 2+ , and c) a polymer component comprising repeat units according to the following formula €ƒ€ƒ€ƒ€ƒ€ƒ€ƒ€ƒ€ƒ (I)€ƒ€ƒ€ƒ€ƒ€ƒ: -[C(X 1 )(X 2 )-C(Y 1 )(Y 2 )-Z]- wherein: X 1 , X 2 are selected, the same or independently from the other, from the group consisting of -H, -OH, -CH 3 , -NH 2 , -CH 2 OH and -C 6 H 9 (OH) 2 ; Y 1 , Y 2 are selected, the same or independently from the other, from the group consisting of -H, -CH 3 , -NC 4 H 6 O, -CONH 2 , -COOH, -COO-, C 6 H 10 SO 2 O- and -C 6 H 10 SO 2 OH; Z is an optional element selected from the group consisting of -O-, -CH 2 -, -CO-and methyl cellulose; wherein the metal ion component and the polymer component together amount to a content range of ‰¥ 5 wt% to ‰¤ 95 wt%, all wt% referring to a total amount of the aqueous polymer electrolyte of 100 wt%.