Candle soot has been collected and applied as an active material for Na⁺-storage anode. The candle soot anode exhibits high reversible capacity and superior rate performance, and this is mainly determined by the pseudocapacitance of Na⁺ cations. The pre-sodiated candle soot anode is coupled with a graphite cathode using a Na-based organic electrolyte to construct a dual-ion battery. Dual-ion batteries display a wide potential window (0–4.7 V), superior cyclic stability (1400 cycles with the retention of 92.3%), and an outstanding rate capability (111 mAh g⁻¹ at a current density of 2 A g⁻¹).

中文翻译：

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从蜡烛烟灰中收集的碳纳米珠作为阳极材料，具有高度假电容性的Na +储存能力，可用于双离子电池

蜡烛烟灰已被收集并用作Na ⁺储存阳极的活性材料。蜡烛烟灰阳极具有高可逆容量和优异的倍率性能，这主要取决于Na ⁺阳离子的拟电容。使用Na基有机电解质将预饱和的蜡烛烟灰阳极与石墨阴极耦合，以构造双离子电池。双离子电池显示很宽的电位窗（0-4.7 V），优异的循环稳定性（1400个循环的92.3％保留），和杰出的速率能力（111毫安克^-1在将2 g的电流密度^{- 1}）。