Optimized assembly of micro-/meso-/macroporous carbon for Li-S batteries
Based on the traditional S/C cathode, the effects of surface area, total pore volume and pore size distribution of carbon pores on performances of Li-S batteries are compared. In addition, on the premise of identically high sulfur content, the relation of the micro/meso/macropore volume ratio with the capacity, voltage plateau, rate capability, and cycle stability of Li-S battery are investigated. Among the samples, the porous carbon possesses the largest micropore volume ratio of 47.54% while a medium specific surface area of 1217 m2/g and inferior total pore volume of 0.54 cm3/g presents the highest initial discharge specific capacity of 1327 mAh/g and retention of 630 mAh/g over 100 cycles at 0.2C rate along with the best rate capability. The conclusions in this study can be directly applied in material fabrication for other systems of energy storage and even as criterions for further modification of Li-S batteries based on carbon material.
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Topic World Battery Technology
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Topic World Battery Technology
The topic world Battery Technology combines relevant knowledge in a unique way. Here you will find everything about suppliers and their products, webinars, white papers, catalogs and brochures.