Abstract:

Because of high theoretical energy density and large resources of elemental sulfur, lithium sulfur （Li/S） became one of hot topics in the battery community. Due to the complex reaction process and many intermediate products which obviously differ to typical lithium ion batteries, this paper shows my own understanding and opinions about Li/S on four aspects of sulfur cathode, lithium anode, electrolyte and battery. Most of reported sulfur cathode materials can be divided into two categories, that is, mobile sulfur and stationary sulfur, which was briefly summarized in Table 1. The lithium metal anode still is the critical problem and more breakthrough works are required to accelerate the progress of Li/S applications. Safety is the first priority. More attention should be paid to construct intrinsic safe Li/S battery to ensure it highly reliable during all cycle life.

Key words: lithium sulfur, sulfur cathode, lithium anode, electrolyte