Corresponding Author

Han-Xi YANG(hxyang@whu.edu.cn)


Rechargeable Li-S batteries are a promising power source with realizable energy densities several times higher than current Li-ion batteries. However, the capacity utilization and cycling stability of the existing Li-S technologies are still insufficient for battery applications. The causes for the electrochemical instability of this redox system arise probably from the changes in the surface structures and electrochemical microenvironments of the Li anode and sulfur cathode during charge-discharge reactions, which includes the frustrated electron transfer in the sulfur-carbon interface, the dissoluble diffusion of the polysulfide intermediates, and the shuttle reaction inbetween the sulfur and Li electrodes. To deal with these problems, this paper tries to reveal the underlying chemistry affecting the charge-discharge stability of Li-S system and describe possible strategies to construct electrochemically stable Li anode and sulfur cathode, so as to achieve high efficiency Li-S batteries.

Graphical Abstract


rechargeable Li-S batteries, interfacial reactions, electrochemical microenviornments

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