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在蔗糖辅助下以一步水热法制备了具有三维网络结构的石墨烯材料,以其作为与硫复合的载体实现了硫在石墨烯中的均匀分布,将此复合材料(3DGNS/S)应用于锂硫电池中表现出了优异的电化学性能:该材料在285mA/g下,首次放电比容量为1396mAh/g。2142mA/g下,首次放电比容量为713mAh/g,循环100周后,仍具有681mAh/g的放电比容量,平均每周的容量衰减率为0.04%,表现出优秀的循环性能。
The graphene material with three-dimensional network structure was prepared by one-step hydrothermal method with the help of sucrose, and the homogeneous distribution of sulfur in graphene was achieved by using it as a carrier to be compounded with sulfur. The composite material (3DGNS / S) Lithium-sulfur battery showed excellent electrochemical properties: The material at 285mA / g, the first discharge capacity of 1396mAh / g. The specific discharge capacity at 2142mA / g was 713mAh / g for the first time. After 100 cycles, the specific discharge capacity was 681mAh / g, and the average capacity decay rate per week was 0.04%, showing excellent cycling performance.