Size Effect Lithium Sulfur Battery

Are lithium-sulfur batteries a potential next-generation battery?

Lithium–sulfur (Li–S) batteries are supposed to be one of the most potential next-generation batteries owing to their high theoretical capacity and low cost. Nevertheless, the shuttle effect of firm multi-step two-electron reaction between sulfur and lithium in liquid electrolyte makes the capacity much smaller than the theoretical value.

Why is sulfur cathode important in Li-S batteries?

Sulfur cathode is a vital element in Li–S batteries for it performs a key function by releasing capacity, increasing energy density, and improving cycle life. Prevention of diffusion of soluble polysulfides is the primary approach for suppressing the shuttle effect.

Can a lithium-sulfur battery replace a current lithium-ion battery?

Lithium-sulfur (Li-S) battery, which releases energy by coupling high abundant sulfur with lithium metal, is considered as a potential substitute for the current lithium-ion battery.

Why do li-s batteries have a sluggish reaction kinetics?

This leads to sluggish reaction kinetics, prolonged retention time of polysulfide intermediates, an exacerbated shuttle effect, as well as a reduction in both the electrochemical stability and lifetime of the cell. This means that Li–S batteries can achieve stable cycling and high energy density if the shuttle effect is effectively suppressed.

How can lithium sulphur battery performance be enhanced?

Z. Wang, Y. Dong, H. Li, Z. Zhao, H. Bin Wu et al., Enhancing lithium–sulphur battery performance by strongly binding the discharge products on amino-functionalized reduced graphene oxide. Nat.

How to design a highly efficient catalyst for lithium-sulfur batteries?

In this work, Zhang Huigang’s team reported how to design a highly efficient catalyst for lithium-sulfur batteries by adjusting the adsorption of polysulfide ions. Through a series of 3D metal doping ZnS, the D-band center of the active site was adjusted, thus precisely regulating the adsorption capacity of the catalyst for polysulfide ions.