APPROACHING HIGH PERFORMANCE POTASSIUM ION

Potassium ion energy storage

Recently, devices relying on potassium ions as charge carriers have attracted wide attention as alternative energy storage systems due to the high abundance of potassium resources (1.5 wt % in the earth's crust) and fast ion transport kinetics of K + in electrolyte. 1 Currently, owing to the lower standard hydrogen potential of potassium (−2.93 V vs. E0) compared to sodium (−2.71 V vs. E0), potassium ion batteries (PIBs) feature the advantage of high energy density have attracted great interest as an alternative to lithium-ion batteries (LIBs). 2 In addition to PIBs, extended potassium-ion storage systems such as dual-ion batteries and K−X (X=O 2, 3 I 2, 4 S, 5 Se 6) batteries have been reported and exhibited excellent K + -storage rate capability. [pdf]

FAQS about Potassium ion energy storage

How do potassium ion batteries store energy?

The popularly reported energy storage mechanisms of potassium-ion batteries (PIBs) are based on alloy-, de-intercalation-, and conversion-type processes, which inevitably lead to structural damage of the electrodes caused by intercalation/de-intercalation of K + with a relatively large radius, which is accompanied by poor cycle stabilities.

Are potassium-ion batteries a viable technology for large scale energy storage?

Nature Communications 11, Article number: 1225 (2020) Cite this article Potassium-ion batteries are a compelling technology for large scale energy storage due to their low-cost and good rate performance. However, the development of potassium-ion batteries remains in its infancy, mainly hindered by the lack of suitable cathode materials.

Are potassium ions a charge carrier?

Tremendous progress has been made in the field of electrochemical energy storage devices that rely on potassium-ions as charge carriers due to their abundant resources and excellent ion transport properties.

Are advanced carbon materials suitable for potassium ion storage?

In the past few decades, advanced carbon materials have attracted great interest due to their low cost, high selectivity, and structural suitability and have been widely investigated as functional materials for potassium-ion storage.

Can high-temperature potassium-ion batteries have high cycle stability?

Distinctively different from the popularly reported works, an energy storage mechanism is proposed for exploring robust high-temperature potassium-ion batteries (PIBs) with high cycle stability. This is based on an example of p-phthalic acid with two carboxyl functional groups as the redox centers.

What is a potassium ion battery?

Science Potassium-ion batteries (PIBs) have attracted tremendous attention due to their low cost, fast ionic conductivity in electrolyte, and high operating voltage. Research on PIBs is still in its infanc...

Polymer energy storage performance

Among various dielectric materials, polymers have remarkable advantages for energy storage, such as superior breakdown strength (Eb) for high-voltage operation, low dissipation factor (tan δ, the ratio of the imaginary part to the real part of the complex dielectric constant of dielectrics) for high charge–discharge efficiency (η), good flexibility for variable device configurations, and self-clearing ability for higher device reliability 6, 7, 8, 9, 10. [pdf]

FAQS about Polymer energy storage performance

How to improve high temperature dielectric energy storage of polymer films?

High temperature dielectric energy storage of polymer films by molecular chains modulation. 4.2. Doping engineering Doping engineering is the most easily strategy to improve the high-temperature performance of polymer dielectric films.

How to improve room-temperature energy storage performance of polymer films?

The strategies for enhancing the room-temperature energy storage performance of polymer films can be roughly divided into three categories: tailoring molecular chain structure, doping functional fillers, and constructing multilayer structure.

How do nanoscale polymers affect energy storage performance?

As the size of fillers or thickness of introduced dielectric layers in the polymer matrix reduce to the nanoscale, the volume fraction of the nano-sized interfacial regions remarkably increases, becoming comparable to that of inorganic components, thus essentially influencing the overall energy storage performance.

Do polymer films have a microstructure and performance relationship?

While high-temperature dielectric energy storage has garnered attention, in-situ studies on the microstructures of polymer films are extremely rare, which hinders the establishment of a microstructure-performance relationship.

Are polymer-based composites a promising strategy for energy storage dielectric materials?

Polymer-based composites have become a promising strategy for developing the novel energy storage dielectric materials used in supercapacitors because of their ability to integrate the high Eb and flexibility of polymer matrices, the high energy storage performance of inorganic ceramics, and the various advantages of other fillers.

Can polymer-based composites improve energy storage properties?

Hence, this review provides a systematic summary of recent research advances in improving the energy storage properties of polymer-based composites from several aspects, mainly including polymer matrix types, optimization of filler shapes, surface modification of fillers, and design of multi-layer composite structures.

Fluoride ion battery energy storage

In the development of new electrochemical concepts for the fabrication of high-energy-density batteries, fluoride-ion batteries (FIBs) have emerged as one of the valid candidates for the next generation electrochemical energy storage technologies, showing the potential to match or even surpass the current lithium-ion batteries (LIBs) in terms of energy density, safety without dendritic grains, and elimination of dependence on scarce lithium and cobalt resources. [pdf]