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首页> 外文期刊>Applied Surface Science >Recrystallization synthesis of disodium rhodizonate-conductive polyaniline composite with high cyclic performance as cathode material of sodium-ion battery
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Recrystallization synthesis of disodium rhodizonate-conductive polyaniline composite with high cyclic performance as cathode material of sodium-ion battery

机译：钠离子电池正极材料高循环性能的重氮唑啉酸二钠-导电聚苯胺复合材料的重结晶合成

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摘要

Disodium rhodizonate (Na2C6O6) as an organic cathode material has broad application prospects in sodium-ion batteries (SIBs) due to its high theoretical specific capacity. However, Na2C6O6 may fall off the current collector in the electrochemical cycle, which causing the capacity to decay rapidly. In this paper, a Disodium rhodizonate-conductive polyaniline (Na2C6O6-PANI) composite was prepared by antisolvent precipitation method. The surface of Na2C6O6 produced by pulverization can still contact the surface of conducive polyaniline (PANI), which prevent the active material from separating from the conducive agent. The high conductivity of conductive polyaniline can reduce the higher impedance that caused by poor contact between the crushed Na2C6O6 and current collector in the electrochemical cycle. At a current density of 500 mA g(-1) in the voltage range of 0.5-3.2 V, the discharge specific capacity of Na2C6O6-PANI (9:1) has 174 mAh g(-1) after 50 cycles and the capacity retention rate is 63%. This modification method provides a strategy for improving electrode materials based on quinones.
机译：作为有机阴极材料的重氮二钠（Na2C6O6）由于其较高的理论比容量，在钠离子电池（SIB）中具有广阔的应用前景。但是，Na2C6O6在电化学循环中可能会从集电器上掉落，从而导致容量迅速衰减。本文采用反溶剂沉淀法制备了导电性的重氮二钠二钠（Na2C6O6-PANI）复合材料。粉碎产生的Na2C6O6表面仍然可以接触导电聚苯胺（PANI）的表面，从而阻止了活性物质与导电剂的分离。导电性聚苯胺的高电导率可以降低因粉碎的Na2C6O6与电化学循环中破碎的Na2C6O6与集电器之间接触不良而引起的较高阻抗。在0.5-3.2 V的电压范围内，电流密度为500 mA g（-1）时，Na2C6O6-PANI（9：1）的放电比容量在50个循环后具有174 mAh g（-1），并且容量保持率率是63％。该修饰方法提供了用于改进基于醌的电极材料的策略。

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