Li2S‐Carbon Sandwiched Electrodes with Superior Performance for Lithium‐Sulfur Batteries

DOI: 10.1002/aenm.201300655 As the petroleum resources deplete and the concern on environmental pollution increases, utilization of renewable energies (e.g., solar and wind) and the adoption of electric vehicles are becoming more desirable. However, the development of an electrical energy storage system that can meet the rigorous requirements on the weight and volume for electric vehicles or on the cycle life and cost for stationary storage is a challenge. Li-ion batteries, representing the highest energy density battery chemistry, are believed to be one of the most promising technologies. However, the capacities of the current insertion oxide cathodes (e.g., layered and spinel oxides) have reached their limits of <300 mAh g −1 , [ 1 ] which forces the materials community to develop alternative high-capacity cathode materials that can support multiple electrons per molecule, such as sulfur and oxygen. [ 2 ]

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