热电池电解质流动抑制剂MgO的研究

Study of MgO materials for immobilizing electrolyte in thermal battery

为获得性能优良、满足科研生产需求的电解质粘合剂MgO材料,采用扫描电镜(SEM)、比表面积(BET)等测试手段对国内九种MgO材料进行了微观形貌和比表面积、孔径分布特征的观察分析;并通过测试电解质泄露量,评价不同MgO作为吸附剂时的吸附作用效果和不同种类MgO作为粘合剂时的抑制流动情况;同时将不同种类的MgO材料作为粘合剂制备成单体电池,进行了电性能的测试。结果表明:1~#～9~#样品形貌差异非常明显,由粒径约为几十纳米～几百纳米的颗粒聚集体或片状聚集体组成;与现有生产使用的1~#MgO材料平均孔径和总孔体积性能参数相近的有3~#、5~#和9~#MgO;与其他几种MgO材料相比,3~#MgO具有更强的吸附能力,并且对电解质E有更强的流动抑制作用;与现有生产使用的1~#MgO材料相比,以3~#MgO为抑制剂制成的单体电池具有最高的放电比容量和更高的放电电压。

In order to obtain excellent performance and meet the needs of scientific research and production of adhesive MgO, scanning electron microscopy (SEM) and specific surface area (BET) were used to observe the surface morphology and specific surface area and pore size distribution of nine kinds of MgO materials. The effect of different MgO as adsorbent and the inhibition of different kinds of MgO as binder were evaluated by measuring electrolyte leakage. At the same time, different kinds of MgO materials were used as binder to prepare the single cell, and the electrical properties were also tested. The results show that the morphology of 1^#~ 9^# MgO is obvious different, and it is composed of particle aggregates or lamellar aggregates with particle sizes ranging from tens of nanometers to hundreds of nanometers. 3^#, 5^# and 9^# MgO are similar to those of the existing 1^# MgO materials with the average pore size and total pore volume. Compared with other MgO materials, 3^# MgO has stronger adsorption ability, and has stronger flow inhibition effect on E. Compared with the existing 1^# MgO materials used in the production, a single cell with 3^# MgO as the inhibitor has the highest discharge capacity and higher discharge voltage.