Dual concept of energy storage sodium ions

What is a sodium dual ion battery (SDIB)?

Sodium dual-ion batteries (SDIBs) employing covalent organic frameworks (COFs) as anode exhibit enormous application prospect and attract widespread attention for large-scale energy storage and conversion owing to the advantages of environment-friendly, cost-effective, and high-safety.

How to produce Mg/Na dual-ion batteries with higher working voltages?

To produce Mg/Na dual-ion batteries with higher working voltages, here we show an alternative cell employing oxidatively stable Na-ion electrolytes and Na-ion conductive membranes (β -alumina) on the cathode side of the battery (Fig. 1).

Does a magnesium-sodium dual-ion battery have a higher operating voltage?

Here, we examine a magnesium-sodium dual-ion concept, which allows for higher operating voltages of magnesium-sodium dual-ion batteries by using oxidatively stable sodium-ion electrolytes along with a sodium-ion conducting β-alumina membrane on the cathode side.

Does SSEPM/G dual-ion battery system perform better than sodium-based Dibs?

Based on the above analysis, the constructed SSePM//G dual-ion battery system exhibits significantly superior performance in terms of capacity retention, rate capability, specific discharge capacity, cyclic life, and energy density than the currently reported sodium-based DIBs employing COFs electrode materials, as depicted in Fig. 7 n. 3.

What is the discharge capacity of a sodium battery?

A discharge capacity of 102.9 mAh g −1 is delivered at 0.5C (1C=100 mA g −1), and as the current density increases to 5C, 81.5 % of the initial capacity at 0.5C can be maintained. This remarkable rate capability could be attributed to the introduction of dual-ion strategy in anode-free sodium batteries (Fig. 2 a, b).

Can a dual-ion battery be anode-free?

To overcome this dilemma, dual-ion storage strategy is introduced to anode-free battery. As a proof of concept, an anode-free sodium dual-ion battery (AFSDIB) with combined high energy and power densities is successfully fabricated.