多孔碳电极用于多硫化钠-溴储能电池

研究了多硫化钠-溴(PSB)储能电池用多孔碳电极。电极材料为活性炭、导电炭黑、热塑性聚合物粘结剂,电极采用热压成型方法制备。用多孔炭电极作为电池正负极,系统地探讨了电极组成、活性炭颗粒粒径、造孔剂对电池充放电性能的影响。粘结剂量一定时,导电炭黑、活性炭比例存在最优值。大颗粒活性炭有利于保持电极的机械稳定性。加大造孔剂的量,促进了电极内孔的连通性,电池性能提高。活性炭制得的电极具有较高的电化学活性,在80 ℃、120 mA/cm2放电电流密度时比功率达0.14 W/cm2(1.19 V),可见活性炭是一种高性价比的PSB储能电池电极材料。

Porous carbon electrodes for sodium polysulfide-bromine redox flow energy storage cell

Porous carbon electrodes for sodium polysulfide/bromine (PSB) energy storage cell were investigated in this paper. The electrodes were prepared by hot isostatic pressing with activated carbon (AC), electrical conductive black carbon (BC) and thermoplastic binder. Effects of composition of electrode, particle size of activated carbon and weight proportion of pore precursor on the charge/discharge performance of the cell were examined. Optimization was needed for the ratio of BC/AC under the same amount of binder. It preferred to using activated carbon has large particle size for the mechanical stability of the electrode. Higher performance was obtained when more pore precursor was utilized. The power density output of up to 0.14 W/cm2 (1.19 V) was obtained when the porous carbon electrodes were applied. It was concluded that the activated carbon was an excellent electrode material with high performance/price ratio.