“锂硫电池”专辑序言

Preface to the Special Issue on Lithium-Sulfur Batteries

锂硫电池是指采用硫或含硫复合物作为正极,锂或含锂材料为负极,以硫-硫键的断裂/生成来实现电能与化学能相互转换的一类电池体系。由于活性物质具有质轻、多电子反应等特性,从而能够实现高达1675m Ah·g^(-1)的理论比容量和2600 Wh·kg^(-1)的质量比能量。这比传统的锂离子电池的能量密度高出7倍左右,极有潜力成为新一代高能量密度电化学储能体系,近年来一直是高能锂金属电池领域的研究热点之一。然而,锂硫电池的实用化依然存在着诸多问题。

Lithium sulfur battery(LSB)is a kind of electrochemical energy storage system that uses sulfur containing cathode and lithium-containing anode to realize the conversion between electric energy and chemical energy.Due to the light weight and multi-electron reaction characteristics of the active material,LSB can achieve a theoretical specific capacity of 1675 mAh·g^(-1) and a specific energy of 2600 Wh·kg^(-1).This is about seven times higher than the energy density of conventional lithium ion batteries.It shows great potential to become a new generation of high energy density electrochemical energy storage systems and become one of the research hotspots in the field of high-energy lithium metal batteries in recent years.