高效率多硫化钠/溴储能电池的研究

Study on high efficiency sodium polysulfide/bromine energy storage cell

采用高温还原的方法制备了多硫化钠/溴储能电池负极用Ni/C催化剂,Ni/C、Pt/C分别是多硫化钠/溴储能电池负极和正极性能良好的电催化剂。系统地研究了Nafion膜的厚度、电催化剂含量、操作条件对电池充放电性能的影响。采用较厚的膜,电池性能稍微降低,但可减少阴离子的渗透。这种新型储能电池放电时功率密度达到0 7W/cm2(U=1 0V)。循环性能研究表明:采用较厚的膜,电池的充放电性能好,性能衰减很小,在100mA/cm2充放电,电压效率达到86 7%。

The catalyst of nickel supported on carbon was made by reduction with hydrogen at high temperatureNi/C catalyst and Pt/C catalyst had high performance for the negative electrode and positive electrode of sodium polysulfide/bromine energy storage cell respectivelyEffect of the thickness of Nafion membrane,content of electrocatalyst,operation conditions on the charging and discharging performance of the cell were investigatedWhen the thickness of membrane increased,the cell performance decreased slightly but the undesirable permeation rate of anions decreasedThe power output density of up to 07?W/cm2 (U=10?V) was obtained in this novel energy storage systemIt could be seen that the sodium polysulfide/bromine energy storage cell using thick membrane maintained good performance over the whole charge and discharge cyclesThe performance deterioration of the cell and low The cell potential efficiency of up to 867% was obtained when both charging and discharging power densities were 100?mA/cm2