Applications of transition-metal sulfides in the cathodes of lithium-sulfur batteries

Lithium-sulfur(Li-S)batteries are considered as one of the most promising candidates for next-generation energy storage systems with high energy density and reliable performance.However,the commercial applications of lithium-sulfur batteries is hindered by several shortcomings like the poor conductivity of sulfur and its reaction products,and the loss of active materials owing to the diffusion of lithium polysulfides(LiPSs)into the electrolyte.Hence,the effective restraining of the LiPSs and the promotion of the sluggish conversion are highly demanded to fulfill the potential of lithium-sulfur batteries.Here,we summarize the applications of transition-metal sulfides(TMSs)in the cathodes over recent years and demonstrate the unique advantages they possess to realize reliable long-life lithium-sulfur batteries.

Preface to the special issue on tungsten-and molybdenum-based two-dimensional materials for energy storage and conversion

Dramatically increased atmospheric CO_(2) level leads to apparent global climate change,which is an urgent and unpredictable threat to human societies.Developing new energies to replace traditional fossil energy is critical for sustainable development.For example,hydrogen is deemed as a clean and renewable energy alternative to fossil fuels.Alternatively,electricity will play an increasingly critical role in the future in terms of its low cost,diverse sources and wide applications and storage of electric energy is crucial for the applications.Increasing the energy density of lithium-based batteries is the key to satisfy the continuously growing energy demands for electric vehicles,portable electronic devices and smart grid storage.Specifically,Li-S batteries have much higher energy density than that of traditional Liion batteries,which are the most promising energy storage devices in the future.