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Lithium-ion batteries power our lives.

Lithium sulfide (Li2S) is a promising cathode material with a high theoretical capacity (1166 mA h g−1) that can be paired with nonlithium-metal anodes, which can eliminate the safety issue related with lithium anode. Nevertheless, its poor electronic conductivity and low Li ion diffusion lead to the high activation barrier of Li2S and sluggish kinetic conversion to polysulfides, hindering its commercialization. Herein, Li2S particles coated by Co nanomaterial-decorated porous carbon shells (Li2S/Co@C) are catalytically synthesized in-situ as the Li2S-Co heterostructures to enhance Li2S reac...

Alleviating the shuttle effect is the core issue to realizing the practical application of lithium-sulfur battery (Li-S battery). In this study, heteroatom-doped Ginkgo Folium porous carbon (HDGF) was synthesized. The HDGF has micro-mesoporous composite structure, super large specific surface area, and excellent electrical conductivity. Attractively, HDGF-modified separator forms a unique 3D porous structure, which improves the affinity with electrolyte and accelerates the transport of Li+. Coupled with the strong chemical adsorption of polysulfides by heteroatoms, the battery exhibits excelle...

The world-wide energy revolution from fossil to renewable energy, such as wind and solar energy, has made greater demand on energy storage systems, which flatten the fluctuations of those energy supplies caused by their intrinsic attributes. The scaled-up implementation of these energy storage systems in power grids requires low cost and high energy density in these systems. The lithium-sulfur (Li-S) battery is one of the most promising systems that can meet the above requirements owing to its high capacity (1672 mA h g-1) and energy density, as well as the low cost of sulfur. Nevertheless, so...

Li-S batteries are considered a promising energy storage system owing to the great abundance of sulfur and its high specific capacity. Polysulfide shuttling and sluggish reaction kinetics in sulfur cathodes significantly degrade the cycle life of Li-S batteries. A modified method is employed to create defects in carbon nanotubes (CNTs), anchoring polysulfides, and accelerating electrochemical reactions. The defect-rich CNTs (D-CNT) enable dramatic improvement in both cycling and rate performance. A specific capacity of 600 mAh g−1 with a current density of 0.5 C is achieved after 400 cycles,...